Updated

Scripts/Animation/epic_pose_wrangler/v2/__init__.py

@@ -0,0 +1,5 @@
+from .extensions import (
+    bake_poses,
+    copy_paste_trs,
+    generate_inbetweens
+)

Scripts/Animation/epic_pose_wrangler/v2/extensions/bake_poses.py

@@ -0,0 +1,97 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+
+import traceback
+from functools import partial
+
+from maya import cmds
+
+from epic_pose_wrangler.log import LOG
+from epic_pose_wrangler.v2.model import base_extension, pose_blender
+
+class BakePosesToTimeline(base_extension.PoseWranglerExtension):
+    __category__ = "Core Extensions"
+
+    @property
+    def view(self):
+        if self._view is not None:
+            return self._view
+        from Qt import QtWidgets
+        self._view = QtWidgets.QPushButton("Bake Poses To Timeline")
+        self._view.clicked.connect(partial(self.execute, None))
+        return self._view
+
+    def execute(self, context=None, **kwargs):
+        if context is None:
+            context = self.api.get_context()
+        if context.current_solver is not None:
+            bake_poses_to_timeline(solver=context.current_solver, view=self._display_view)
+
+def bake_poses_to_timeline(start_frame=0, anim_layer=None, solver=None, view=False):
+    """
+    Bakes the poses to the timeline and sets the time range to the given animation.
+    :param start_frame :type int: start frame of he baked animation
+    :param anim_layer :type str: if given the animations will be baked on that layer or created if it doesn't exist
+    :param solver :type api.RBFNode: solver reference
+    :param view :type bool: is the view present
+    """
+    # Grab all the transforms for the solver
+    transforms = solver.drivers()
+    transforms.extend(solver.driven_nodes(pose_blender.UEPoseBlenderNode.node_type))
+
+    bake_enabled = True
+    pose_list = []
+    # Set default anim layer if one isn't specified
+    if not anim_layer:
+        anim_layer = "BaseAnimation"
+    # If the layer doesnt exist, create it
+    if not cmds.animLayer(anim_layer, query=True, exists=True):
+        cmds.animLayer(anim_layer)
+    try:
+        cmds.autoKeyframe(e=1, st=0)
+        # If we are running with the view, provide a popup
+        if view:
+            from Qt import QtWidgets
+            msg = ("This will bake the poses to the timeline, change your time range, "
+                   "and delete inputs on driving and driven transforms.\n"
+                   "Do you want this to happen?")
+
+            ret = QtWidgets.QMessageBox.warning(
+                None, "WARNING: DESTRUCTIVE FUNCTION", msg,
+                QtWidgets.QMessageBox.Ok | QtWidgets.QMessageBox.Cancel,
+                QtWidgets.QMessageBox.Cancel
+            )
+            if ret == QtWidgets.QMessageBox.StandardButton.Ok:
+                bake_enabled = True
+                cmds.undoInfo(openChunk=True, undoName='Bake poses to timeline')
+            else:
+                bake_enabled = False
+
+        # If we are baking, do the bake
+        if bake_enabled:
+            i = start_frame
+            for pose_name in solver.poses():
+                # let's key it on the previous and next frames before we pose it
+                cmds.select(transforms)
+                cmds.animLayer(anim_layer, addSelectedObjects=True, e=True)
+                cmds.setKeyframe(transforms, t=[(i - 1), (i + 1)], animLayer=anim_layer)
+
+                # assume the pose
+                solver.go_to_pose(pose_name)
+
+                cmds.setKeyframe(transforms, t=[i], animLayer=anim_layer)
+
+                pose_list.append(pose_name)
+
+                # increment to next keyframe
+                i += 1
+
+            # set the range to the number of keyframes
+            cmds.playbackOptions(minTime=0, maxTime=i, animationStartTime=0, animationEndTime=i - 1)
+            cmds.dgdirty(a=1)
+            return pose_list
+
+        cmds.dgdirty(a=1)
+    except Exception as e:
+        LOG.error(traceback.format_exc())
+    finally:
+        cmds.undoInfo(closeChunk=True)

Scripts/Animation/epic_pose_wrangler/v2/extensions/copy_paste_trs.py

@@ -0,0 +1,221 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+
+import traceback
+from functools import partial
+
+from maya import cmds
+
+from epic_pose_wrangler.log import LOG
+from epic_pose_wrangler.v2.model import base_extension, exceptions, pose_blender
+
+class BakePosesToTimeline(base_extension.PoseWranglerExtension):
+    __category__ = "Core Extensions"
+
+    @property
+    def view(self):
+        if self._view is not None:
+            return self._view
+        from Qt import QtWidgets
+
+        self._view = QtWidgets.QWidget()
+        layout = QtWidgets.QVBoxLayout()
+        self._view.setLayout(layout)
+
+        label = QtWidgets.QLabel("Copy/Paste Driven Transforms")
+        layout.addWidget(label)
+
+        button_layout = QtWidgets.QHBoxLayout()
+        layout.addLayout(button_layout)
+
+        copy_button = QtWidgets.QPushButton("Copy")
+        copy_button.clicked.connect(partial(self.copy_driven_trs, None))
+        button_layout.addWidget(copy_button)
+
+        paste_button = QtWidgets.QPushButton("Paste")
+        button_layout.addWidget(paste_button)
+
+        spin_label = QtWidgets.QLabel("Multiplier: ")
+        button_layout.addWidget(spin_label)
+
+        spin_box = QtWidgets.QDoubleSpinBox()
+        spin_box.setMinimum(0.01)
+        spin_box.setSingleStep(0.1)
+        spin_box.setValue(1.0)
+        button_layout.addWidget(spin_box)
+
+        paste_button.clicked.connect(partial(self.paste_driven_trs, lambda: spin_box.value(), None))
+
+        return self._view
+
+    def execute(self, context=None, **kwargs):
+        copy = kwargs.get('copy', False)
+        driver = kwargs.get('driver', True)
+        multiplier = kwargs.get('multiplier', 1.0)
+        if context is None:
+            context = self.api.get_context()
+        if context.current_solver is not None:
+            if copy:
+                if driver:
+                    self.copy_driver_trs()
+                else:
+                    self.copy_driven_trs()
+            else:
+                if driver:
+                    self.paste_driver_trs(multiplier=multiplier)
+                else:
+                    self.paste_driven_trs(multiplier=multiplier)
+
+    def copy_driven_trs(self, solver=None):
+        """
+        Copy the driven transforms translate, rotate and scale for the specified solver
+        :param solver :type api.RBFNode: solver reference
+        """
+        context = self.api.get_context()
+        solver = solver or context.current_solver
+        CopyPasteTRS.copy_driven(solver)
+
+    def paste_driven_trs(self, multiplier=1.0, solver=None):
+        """
+        Paste the driven transforms translate, rotate and scale based on the multiplier specified
+        :param multiplier :type float: scale multiplier
+        :param solver :type api.RBFNode: solver reference
+        """
+        # Get the solver if it hasn't been specified
+        if callable(multiplier):
+            multiplier = multiplier()
+        context = self.api.get_context()
+        solver = solver or context.current_solver
+        edit_status = self.api.get_solver_edit_status(solver=solver)
+        if not edit_status:
+            self.api.edit_solver(edit=True, solver=solver)
+        CopyPasteTRS.paste_driven(multiplier=multiplier)
+
+    def copy_driver_trs(self, solver=None):
+        """
+        Copy the driver transforms translate, rotate and scale for the specified solver
+        :param solver :type api.RBFNode: solver reference
+        """
+        context = self.api.get_context()
+        # Get the solver if it hasn't been specified
+        solver = solver or context.current_solver
+        # Copy the driver transforms
+        CopyPasteTRS.copy_driver(solver)
+
+    def paste_driver_trs(self, multiplier=1.0):
+        """
+        Paste the driver transforms rotate and scale based on the multiplier specified
+        :param multiplier :type float: scale multiplier
+        """
+        if callable(multiplier):
+            multiplier = multiplier()
+        CopyPasteTRS.paste_driver(multiplier=multiplier)
+
+class TRSError(exceptions.exceptions.PoseWranglerException):
+    pass
+
+class CopyPasteTRS(object):
+    """
+    Class wrapper for copying and pasting TRS data
+    """
+    # Dicts to store the driver and driven data. Driver data is only used when auto generating poses
+    TRS_DRIVEN_DATA = {}
+    TRS_DRIVER_DATA = {}
+
+    @classmethod
+    def copy_driven(cls, solver):
+        """
+        Copy the driven transforms TRS data for the specified solver
+        :param solver :type api.RBFNode: solver reference
+        """
+        cls._copy(
+            transforms=solver.driven_nodes(pose_blender.UEPoseBlenderNode.node_type),
+            target_datastore=cls.TRS_DRIVEN_DATA
+        )
+
+    @classmethod
+    def paste_driven(cls, multiplier=1.0):
+        """
+        Paste the copied driven values onto the driven with the specified modifier
+        :param multiplier :type float: multiplier value
+        """
+        cls._paste(multiplier=multiplier, target_datastore=cls.TRS_DRIVEN_DATA)
+
+    @classmethod
+    def copy_driver(cls, solver):
+        """
+        Copy the driver transforms TRS data for the specified solver
+        :param solver :type api.RBFNode: solver reference
+        """
+        cls._copy(transforms=solver.drivers(), target_datastore=cls.TRS_DRIVER_DATA, attributes=['rotate', 'scale'])
+
+    @classmethod
+    def paste_driver(cls, multiplier=1.0):
+        """
+        Paste the copied driver values onto the driver with the specified modifier
+        :param multiplier :type float: multiplier value
+        """
+        cls._paste(multiplier=multiplier, target_datastore=cls.TRS_DRIVER_DATA)
+
+    @classmethod
+    def _copy(cls, transforms, target_datastore, attributes=None):
+        """
+        Copy the specified transforms attributes to the specified datastore
+        :param transforms :type list: list of maya transform nodes
+        :param target_datastore :type dict: reference to cls.TRS_DRIVER_DATA or cls.TRS_DRIVEN_DATA
+        :param attributes :type list: list of attribute names to store
+        """
+        # If no attributes are specified, use TRS
+        if not attributes:
+            attributes = ['translate', 'rotate', 'scale']
+        # Clear the datastore before we copy
+        target_datastore.clear()
+        # For each transform, get the specified attributes and store them in a dictionary
+        for transform in transforms:
+            target_datastore[transform] = {attr: cmds.getAttr(
+                "{transform}.{attr}".format(
+                    transform=transform,
+                    attr=attr
+                )
+            )[0]
+                                           for attr in attributes}
+
+        LOG.info("Successfully copied TRS for {transforms}".format(transforms=transforms))
+
+    @classmethod
+    def _paste(cls, multiplier, target_datastore):
+        """
+        Paste the attributes from the target_datastore multiplied by the given multiplier
+        :param multiplier :type float: multiplier value
+        :param target_datastore : type dict: reference to cls.TRS_DRIVER_DATA or cls.TRS_DRIVEN_DATA
+        """
+        # If the target datastore is empty, we can't paste
+        if not target_datastore:
+            raise TRSError("No data has been copied. Unable to paste")
+
+        # Iterate through the items in the datastore
+        for transform, data in target_datastore.items():
+            # Iterate through the attribute names and values in the datastore
+            for attr, values in data.items():
+                # Set the attribute to the multiplied value
+                try:
+                    cmds.setAttr(
+                        "{transform}.{attr}".format(transform=transform, attr=attr), values[0] * multiplier,
+                                                                                     values[1] * multiplier,
+                                                                                     values[2] * multiplier
+                    )
+                except:
+                    traceback.print_exc()
+
+            # Calculate and set the scale
+            scale = [((s - 1.0) * multiplier) + 1 for s in data['scale']]
+            try:
+                cmds.setAttr("{driven}.scale".format(driven=transform), *scale)
+            except:
+                traceback.print_exc()
+
+        LOG.info(
+            "Successfully pasted TRS with multiplier: {multiplier} for {transforms}".format(
+                multiplier=multiplier,
+                transforms=list(target_datastore.keys())
+            )
+        )

Scripts/Animation/epic_pose_wrangler/v2/extensions/generate_inbetweens.py

@@ -0,0 +1,70 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+from functools import partial
+
+from epic_pose_wrangler.v2.model import base_extension
+from epic_pose_wrangler.v2.extensions import copy_paste_trs
+
+class GenerateInbetweens(base_extension.PoseWranglerExtension):
+    __category__ = "Core Extensions"
+
+    @property
+    def view(self):
+        if self._view is not None:
+            return self._view
+        from Qt import QtWidgets
+
+        self._view = QtWidgets.QWidget()
+        layout = QtWidgets.QVBoxLayout()
+        self._view.setLayout(layout)
+
+        label = QtWidgets.QLabel("Copy/Paste Driven Transforms")
+        layout.addWidget(label)
+
+        button_layout = QtWidgets.QHBoxLayout()
+        layout.addLayout(button_layout)
+
+        generate_inbetweens_button = QtWidgets.QPushButton("Generate Inbetweens")
+        button_layout.addWidget(generate_inbetweens_button)
+
+        spin_label = QtWidgets.QLabel("Pose Count: ")
+        button_layout.addWidget(spin_label)
+
+        spin_box = QtWidgets.QSpinBox()
+        spin_box.setMinimum(1)
+        spin_box.setSingleStep(1)
+        spin_box.setValue(1)
+        button_layout.addWidget(spin_box)
+
+        generate_inbetweens_button.clicked.connect(partial(self.generate_inbetweens, lambda: spin_box.value()))
+
+        return self._view
+
+    def generate_inbetweens(self, count=1, pose_prefix="pose"):
+        """
+        Generate inbetween poses between the current position and the default pose
+        :param count :type int: number of poses to generate
+        :param pose_prefix :type: name of the pose
+        """
+        context = self.api.get_context()
+        if callable(count):
+            count = count()
+
+        solver = context.current_solver
+        copy_paste_trs_action = self.api.get_extension_by_type(copy_paste_trs.BakePosesToTimeline)
+        copy_paste_trs_action.copy_driven_trs(solver=solver)
+        copy_paste_trs_action.copy_driver_trs(solver=solver)
+
+        # Calculate the multiplier increment based on the number of desired poses
+        multiplier_increment = 1.0 / float((count + 1))
+        # Set the start multiplier
+        multiplier = 1.0
+        # Iterate through the number of desired poses
+        for i in range(count):
+            # Generate the new multiplier
+            multiplier -= multiplier_increment
+            # Paste the driver and driven translate, rotate and scale based on the new multiplier
+            # Note: Driver only gets rotate and scale applied to it.
+            copy_paste_trs_action.paste_driven_trs(multiplier)
+            copy_paste_trs_action.paste_driver_trs(multiplier)
+            # Create a new pose at this position
+            self.api.create_pose(pose_name="{pose_prefix}_{i}".format(pose_prefix=pose_prefix, i=i), solver=solver)

Scripts/Animation/epic_pose_wrangler/v2/main.py

@@ -0,0 +1,830 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+import inspect
+import json
+import os
+import sys
+
+from maya.api import OpenMaya as om
+
+from epic_pose_wrangler.log import LOG
+from epic_pose_wrangler.model import mirror_mapping, settings, exceptions
+from epic_pose_wrangler.model.api import RBFAPI
+from epic_pose_wrangler.v2.model import api, base_action, base_extension, pose_blender, context, utils
+from epic_pose_wrangler.v2.model import exceptions as api_exceptions
+
+class UERBFAPI(RBFAPI):
+    """
+    Main entry point for interacting with the UERBFSolverNode and UEPoseBlenderNode
+
+    >>> from epic_pose_wrangler.v2 import main
+    >>> rbf_api = main.UERBFAPI(view=False)
+    >>> rbf_api.create_rbf_solver(solver_name="ExampleSolver", drivers=['leg_l'])
+    """
+    VERSION = "2.0.0"
+
+    def __init__(self, view=False, parent=None, file_path=None):
+        super(UERBFAPI, self).__init__(view=view, parent=parent)
+
+        self._view = None
+
+        # Set up a default mirror mapping
+        self._mirror_mapping = mirror_mapping.MirrorMapping()
+        # Instantiate a settings manager to restore settings from previous sessions
+        self._settings_manager = settings.SettingsManager()
+        # Empty var to store the current solver for convenience so that you don't have to pass the solver through
+        # every time you call a function
+        self._current_solver = None
+        # Empty list to store any core and custom actions used to extend the functionality of PoseWrangler
+        self._extensions = []
+
+        # If view is requested, import and build the UI. We use a local import so that any QtWidget dependencies
+        # won't be loaded if the user is running from mayapy
+        if view:
+            from epic_pose_wrangler.v2.view import pose_wrangler_window
+            self._view = pose_wrangler_window.PoseWranglerWindow()
+            # Connect up the views events to the appropriate functions
+            self._setup_view_events()
+
+        # Load the contents of the current scene
+        LOG.info("Loading PoseWrangler...")
+        self.load()
+        # If a file path is specified, deserialize and load it
+        if file_path:
+            self.deserialize_from_file(file_path=file_path)
+
+    @property
+    def extensions(self):
+        """
+        :return: list of pose wrangler extensions currently loaded
+        :rtype: list[pose_wrangler.v2.model.base_extension.PoseWranglerExtension]
+        """
+        return self._extensions
+
+    @property
+    def view(self):
+        """
+        :return: reference to the ui QWidget
+        :rtype: QtWidgets.QWidget or None
+        """
+        return self._view
+
+    @property
+    def current_solver(self):
+        """
+        :return: reference to the current solver
+        :rtype: api.RBFNode or None
+        """
+        return self._current_solver
+
+    @current_solver.setter
+    def current_solver(self, solver):
+        # If the specified solver is not an RBFNode class, raise exception
+        if not isinstance(solver, api.RBFNode):
+            raise api_exceptions.InvalidSolverError(
+                "Solver is not a valid {node_type} node".format(node_type=api.RBFNode)
+            )
+        # Set the current solver
+        self._current_solver = solver
+        solvers = self.rbf_solvers
+        for action in self._extensions:
+            action.on_context_changed(
+                context.PoseWranglerContext(current_solver=solver, solvers=solvers)
+            )
+        # If we are displaying the view, update it with the current selection
+        if self._view:
+            # Generate a kwarg dict.
+            kwargs = {
+                "solver": solver,
+                # We want to store a reference to the MObject in case the name of the  node is changed and the
+                # user doesn't refresh the UI
+                "drivers": {driver: om.MGlobal.getSelectionListByName(driver).getDependNode(0) for driver in
+                            solver.drivers()},
+                # We want to display both the driven transforms and connected blendshapes.
+                # NOTE: Blendshapes will only be found if connected up via this API. For more info see:
+                # self.create_blendshape or self.add_blendshape
+                "driven_transforms": {
+                    'transform': solver.driven_nodes(pose_blender.UEPoseBlenderNode.node_type),
+                    'blendshape': {mesh: solver.get_pose_for_blendshape_mesh(mesh) for mesh in
+                                   solver.driven_nodes(type='blendShape')}
+                },
+                "poses": solver.poses()
+            }
+            # Load the solver settings in the view with the given kwargs
+            self._view.load_solver_settings(**kwargs)
+
+    @property
+    def mirror_mapping(self):
+        """
+        :return: reference to the currently loaded mirror mapping
+        :rtype: mirror_mapping.MirrorMapping object
+        """
+        return self._mirror_mapping
+
+    @property
+    def rbf_solvers(self):
+        """
+        :return: list of rbf solvers in the scene
+        :rtype: list
+        """
+        return api.RBFNode.find_all()
+
+    # ================================================ Solvers ======================================================= #
+
+    def create_rbf_solver(self, solver_name, drivers=None):
+        """
+        Create an rbf solver node with the given name and the specified driver transforms
+
+        :param solver_name: name of the solver node
+        :type solver_name: str
+        :param drivers: list of driver transform node names
+        :type drivers: list
+        :return: RBFNode ref
+        :rtype: api.RBFNode
+        """
+        # If no drivers are specified, grab the current selection
+        drivers = drivers or utils.get_selection(_type='transform')
+        LOG.debug("Creating RBF solver '{name}' with drivers: {drivers}".format(name=solver_name, drivers=drivers))
+        # Create the solver
+        solver = api.RBFNode.create(solver_name)
+        # If drivers have been specified, add them
+        if drivers:
+            self.add_drivers(drivers=drivers, solver=solver)
+        # If we are in UI mode, add the solver to the view
+        if self._view:
+            self._view.add_rbf_solver(solver)
+        # Set the current solver
+        self.current_solver = solver
+        # Set the current solver to edit mode
+        self.edit_solver(edit=True, solver=solver)
+        # Return the new solver
+        return solver
+
+    def delete_rbf_solver(self, solver=None):
+        """
+        Delete the specified solver
+
+        :param solver:  solver reference
+        :type solver: api.RBFNode
+        """
+        # If no solver is specified, grab the current solver
+        solver = solver or self._current_solver
+        # Delete the solver
+        solver.delete()
+        # If we are using the UI, delete the solver
+        if self._view:
+            self._view.delete_solver(solver)
+        # If the current solver is this solver, set current to None
+        if self._current_solver == solver:
+            self._current_solver = None
+
+    def edit_solver(self, edit=True, solver=None):
+        """
+        Edit or finish editing the specified solver. Enables pose creation/driven node changes via the ui
+
+        :param edit:  set edit mode on or off
+        :type edit: bool
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # If no solver is specified, grab the current solver
+        solver = solver or self._current_solver
+        # Edit the solver
+        solver.edit_solver(edit=edit)
+        # If we have a ui, update the edit mode status
+        if self._view:
+            self._view.edit_solver(solver=solver, edit=edit)
+        LOG.debug("Setting edit status: {status} for solver: {solver}".format(status=edit, solver=solver))
+        self.current_solver = solver
+
+    def mirror_rbf_solver(self, solver=None):
+        """
+        Mirror the current solver
+
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        :return: mirrored solver reference
+        :rtype: api.RBFNode
+        """
+        # If no solver is specified, grab the current solver
+        solver = solver or self._current_solver
+        mirrored_solver = solver.mirror(self.mirror_mapping)
+        if self._view:
+            self._load_view()
+
+        # Set the current solver to the new solver
+        self.current_solver = mirrored_solver
+        # Return the new solver
+        return mirrored_solver
+
+    def get_rbf_solver_by_name(self, solver_name):
+        """
+        Searches the scene for an rbf solver with the given name. Case insensitive
+
+        :param solver_name: Solver node name
+        :type solver_name: str
+        :return: found node or None
+        :rtype: api.RBFNode or None
+        """
+        for solver in api.RBFNode.find_all():
+            if str(solver).lower() == solver_name.lower():
+                return solver
+
+    # ================================================ Drivers ======================================================= #
+
+    def add_drivers(self, drivers=None, solver=None):
+        """
+        Add the specified drivers to the specified solver
+
+        :param drivers: list of transform nodes
+        :type drivers: list
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # If no solver is specified, grab the current solver
+        solver = solver or self._current_solver
+        # If we already have more than one pose, we can't add a new driver (would require manually updating every pose)
+        if solver.num_poses() > 1:
+            raise api_exceptions.InvalidPoseIndex("Too many poses have been created, unable to add a new driver.")
+        # Check if we have a default pose
+        if solver.has_pose(pose_name='default'):
+            # Delete the current rest pose if found
+            solver.delete_pose(pose_name='default')
+        # Add new drivers
+        solver.add_driver(transform_nodes=drivers)
+        # Create the new rest pose with all the drivers
+        solver.add_pose_from_current(pose_name='default')
+        # Set the current solver
+        self.current_solver = solver
+
+    def remove_drivers(self, drivers, solver=None):
+        """
+        Remove the specified drivers from the specified solver
+
+        :param drivers: list of driver transform nodes
+        :type drivers: list
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Get the solver if it hasn't been specified
+        solver = solver or self._current_solver
+        # Remove the drivers from the solver
+        solver.remove_drivers(drivers)
+        # Have to re-wrap solver due to a bug with targets array indexing
+        self.current_solver = api.RBFNode(str(solver))
+
+    # ================================================ Driven ======================================================== #
+
+    def add_driven_transforms(self, driven_nodes=None, solver=None, edit=False):
+        """
+        Add driven transforms to the specified solver
+
+        :param driven_nodes: list of transform nodes
+        :type driven_nodes: list
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        :param edit: should this transform not be connected to the pose blender output upon creation
+        :type edit: bool
+        """
+        # Get the solver if it hasn't been specified
+        solver = solver or self._current_solver
+        solver.add_driven_transforms(driven_nodes, edit=edit)
+        # Update the current solver
+        self.current_solver = solver
+
+    def remove_driven(self, driven_nodes, solver=None):
+        """
+        Remove driven transforms from the specified solver
+
+        :param driven_nodes: list of transform nodes
+        :type driven_nodes: list
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Get the solver if it hasn't been specified
+        solver = solver or self._current_solver
+        solver.remove_driven_transforms(driven_nodes)
+        # Update the current solver
+        self.current_solver = solver
+
+    # ============================================== Blendshapes ===================================================== #
+
+    def add_blendshape(self, pose_name, mesh_name, base_mesh, solver=None):
+        """
+        Add an existing blendshape for the current pose
+
+        :param pose_name: name of the pose the blendshape is associated with
+        :type pose_name: str
+        :param mesh_name: name of the existing blendshape mesh
+        :type mesh_name: str
+        :param base_mesh: name of the mesh the blendshape mesh is derived from
+        :type base_mesh: str
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Add the blendshape
+        solver.add_existing_blendshape(pose_name, mesh_name, base_mesh)
+        self.current_solver = solver
+
+    def create_blendshape(self, pose_name, mesh_name=None, edit=False, solver=None):
+        """
+        Create a new blendshape for the given pose and mesh
+
+        :param pose_name: name of the pose to create this blendshape for
+        :type pose_name: str
+        :param mesh_name: name of the mesh to create the blendshape from
+        :type mesh_name: str
+        :param edit: should this blendshape be edited straight away
+        :type edit: bool
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        :return: name of the newly created blendshape mesh
+        :rtype: str
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Create a new blendshape mesh at the specified pose
+        blendshape_mesh_name = solver.create_blendshape(pose_name, mesh_name)
+        # If we are editing, change the mode
+        if edit:
+            self.edit_blendshape(pose_name=pose_name, edit=True, solver=solver)
+        else:
+            # If we aren't editing, update the current solver
+            self.current_solver = solver
+        # Return the name of the new blendshape mesh
+        return blendshape_mesh_name
+
+    def delete_blendshape(self, pose_name, solver=None):
+        """
+        Delete the blendshape associated with the specified pose
+
+        :param pose_name: name of the pose to delete blendshapes for
+        :type pose_name: str
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Delete the blendshape mesh at the specified pose
+        solver.delete_blendshape(pose_name, delete_mesh=True)
+        # Set the current solver
+        self.current_solver = solver
+
+    def edit_blendshape(self, pose_name, edit=True, solver=None):
+        """
+        Edit or finish editing the blendshape associated with the specified pose name
+
+        :param pose_name: name of the pose the blendshape is associated with
+        :type pose_name: str
+        :param edit: True = enable editing, False =  finish editing
+        :type edit: bool
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Edit or finish editing the blendshape
+        solver.edit_blendshape(pose_name, edit=edit)
+        # Set the current solver
+        self.current_solver = solver
+        # If we have a ui, update the blendshapes status
+        if self._view:
+            self._view.edit_blendshape(pose_name, edit=edit)
+
+    def isolate_blendshape(self, pose_name, isolate=True, solver=None):
+        """
+        Isolate the blendshape associated with the specified pose name, disabling all other blendshapes.
+
+        :param pose_name: name of the pose the blendshape is associated with
+        :type pose_name: str
+        :param isolate: True = isolate the blendshape, False = reconnect all disconnected blendshapes
+        :type isolate: bool
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Isolate or un-isolate the blendshape
+        solver.isolate_blendshape(pose_name=pose_name, isolate=isolate)
+        # Set the current solver
+        self.current_solver = solver
+
+    # ================================================= Poses ======================================================== #
+
+    def create_pose(self, pose_name, solver=None):
+        """
+        Create a new pose for the specified solver
+
+        :param pose_name: name of the new pose
+        :type pose_name: str
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Create a new pose from the current position
+        solver.add_pose_from_current(pose_name=pose_name)
+        # Set the current solver
+        self.current_solver = solver
+
+    def delete_pose(self, pose_name, solver=None):
+        """
+        Remove a pose from the given solver
+
+        :param pose_name: name of the pose to remove
+        :type pose_name: str
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Delete the pose
+        solver.delete_pose(pose_name)
+        # Set the current solver
+        self.current_solver = solver
+
+    def go_to_pose(self, pose_name, solver=None):
+        """
+        Move the driver/driven transforms to the given pose
+
+        :param pose_name: name of the pose
+        :type pose_name: str
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Go to the pose
+        solver.go_to_pose(pose_name=pose_name)
+
+    def mirror_pose(self, pose_name, solver=None):
+        """
+        Mirror a pose to the mirror of the current solver
+
+        :param pose_name: name of the pose
+        :type pose_name: str
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Mirror the pose
+        solver.mirror_pose(pose_name=pose_name, mirror_mapping=self.mirror_mapping)
+        # Reload all the solvers
+        self.load()
+        # Set the current solver
+        self.current_solver = solver
+
+    def mute_pose(self, pose_name, mute=True, solver=None):
+        """
+        Mute or unmute the specified pose, removing all influences of the pose from the solver.
+        NOTE: This will affect the solver radius if automatic radius is enabled.
+
+        :param pose_name: name of the pose
+        :type pose_name: str
+        :param mute: mute or unmute the pose
+        :type mute: bool
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Mute or unmute the pose
+        solver.mute_pose(pose_name=pose_name, mute=mute)
+        # Set the current solver
+        self.current_solver = solver
+
+    def rename_pose(self, pose_name, new_pose_name, solver=None):
+        """
+        Rename a pose on the given solver
+
+        :param pose_name: name of the pose
+        :type pose_name: str
+        :param new_pose_name: new name of the pose
+        :type new_pose_name: str
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Get the current pose index
+        pose_index = solver.pose_index(pose_name=pose_name)
+        # Rename the pose at the given index
+        solver.rename_pose(pose_index=pose_index, pose_name=new_pose_name)
+        # Update the current solver
+        self.current_solver = solver
+
+    def update_pose(self, pose_name, solver=None):
+        """
+        Update the pose for the given solver
+
+        :param pose_name: name of the pose to update
+        :type pose_name: str
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        """
+        # Ensure we have a solver
+        solver = solver or self._current_solver
+        # Update the pose with the current driver/driven positions
+        solver.add_pose_from_current(pose_name, update=True)
+        LOG.info("Updated {pose_name}".format(pose_name=pose_name))
+
+        self.current_solver = solver
+
+    # ================================================== IO ========================================================== #
+
+    def deserialize_from_file(self, file_path, solver_names=None):
+        """
+        Deserialize solvers from a specific file.
+
+        :param file_path: json file to load
+        :type file_path: str
+        """
+        # Check the path exists
+        if not os.path.exists(file_path):
+            raise exceptions.PoseWranglerIOError(
+                "Unable to deserialize from {file_path}, path does not exist".format(file_path=file_path)
+            )
+        if solver_names is None:
+            solver_names = []
+        # Load the json file and deserialize
+        with open(file_path, 'r') as f:
+            data = json.loads(f.read())
+        self.deserialize(data, solver_names=solver_names)
+        LOG.debug("Successfully loaded solvers: {solvers}".format(solvers=solver_names or list(data.keys())))
+        LOG.info(
+            "Successfully loaded {num_solvers} solver(s) from {file_path}".format(
+                num_solvers=len(data),
+                file_path=file_path
+            )
+        )
+
+    def serialize_to_file(self, file_path, solvers=None):
+        """
+        Serialize the specified solvers to a file
+
+        :param file_path: json file to serialize
+        :type file_path: str
+        :param solvers: list of api.RBFNode to serialize
+        :type solvers: list
+        """
+        # Check that the directory exists before writing to it
+        if not os.path.exists(os.path.dirname(file_path)):
+            os.makedirs(file_path)
+        # Dump the serialized data to the json file
+        with open(file_path, 'w') as f:
+            data = self.serialize(solvers=solvers)
+            LOG.debug("Successfully serialized solvers: {solvers}".format(solvers=list(data.keys())))
+            f.write(json.dumps(data))
+            LOG.info(
+                "Successfully exported {num_solvers} solver(s) to {file_path}".format(
+                    num_solvers=len(data),
+                    file_path=file_path
+                )
+            )
+
+    def deserialize(self, data, solver_names=None):
+        """
+        Deserialize and load the solvers from the data specified
+
+        :param data: serialized solver data
+        :type data: dict
+        :param solver_names: list of solver names to load from the data
+        :type solver_names: list, optional
+        """
+        for solver_name, solver_data in data.items():
+            if solver_names and solver_name in solver_names or not solver_names:
+                api.RBFNode.create_from_data(solver_data)
+        self.load()
+
+    def serialize(self, solvers=None):
+        """
+        Serialize the specified solvers
+
+        :param solvers: list of api.RBFNode to serialize
+        :type solvers: list
+        :return: serialized solver data
+        :rtype: dict
+        """
+        return {str(solver): solver.data() for solver in solvers or self.rbf_solvers}
+
+    def load(self):
+        """
+        Load the default pose wrangler settings
+        """
+        # Set the mirror mapping from user settings
+        self.set_mirror_mapping()
+        self._load_extensions()
+
+        if self._view:
+            self._load_view()
+
+    # =============================================== Utilities ====================================================== #
+
+    def get_context(self):
+        """
+        Get the current solver context
+
+        :return: pose wrangler context containing the current solver and all rbf solvers
+        :rtype: context.PoseWranglerContext
+        """
+        return context.PoseWranglerContext(current_solver=self.current_solver, solvers=self.rbf_solvers)
+
+    def get_ui_context(self):
+        """
+        If the ui is available, return the ui context
+
+        :return: ui context containing the current state of the ui
+        :rtype: ui_context.PoseWranglerUIContext or None
+        """
+        if self._view:
+            return self._view.get_context()
+
+    def get_extension_by_type(self, class_ref):
+        """
+        Get a reference to one of the loaded extensions from a class type
+
+        :param class_ref: reference to an extension class
+        :type class_ref: base_extension.PoseWranglerExtension
+        :return: reference to a loaded extension if one is loaded
+        :rtype: base_extension.PoseWranglerExtension instance or None
+        """
+        extensions = [extension for extension in self._extensions if isinstance(extension, class_ref)]
+        if not extensions:
+            return
+        return extensions[0]
+
+    def set_mirror_mapping(self, path=None):
+        """
+        Set the mirror mapping from a file
+
+        :param path: path to json mirror mapping file
+        :type path: str
+        """
+        # If no path is specified, get the path stored in the settings manager
+        if path is None:
+            path = self._settings_manager.get_setting("MirrorMappingFile")
+        if path:
+            # If the path doesnt exist, raise an exception
+            if not os.path.exists(path):
+                raise exceptions.InvalidMirrorMapping("Unable to find mapping file: {file}".format(file=path))
+            # Set the new mirror mapping
+            self._mirror_mapping = mirror_mapping.MirrorMapping(file_path=path)
+            self._settings_manager.set_setting("MirrorMappingFile", path)
+        # If we are using the UI, update the mirror mapping file path
+        if self._view:
+            self._view.update_mirror_mapping_file(self._mirror_mapping.file_path)
+
+    def get_solver_edit_status(self, solver):
+        """
+        Check if the current solver is in 'Edit' mode
+
+        :param solver: solver reference
+        :type solver: api.RBFNode
+        :return: True = in edit mode, False = not in edit mode
+        :rtype: bool
+        """
+        # Get the solver if it hasn't been specified
+        solver = solver or self._current_solver
+        return solver.get_solver_edit_status()
+
+    def _get_valid_actions(self, ui_context):
+        """
+        Gets the valid actions base on the ui context
+        :param ui_context :type PoseWranglerUIContext: current selection state of the UI
+        """
+        if not self._view:
+            return
+        # Find all the available actions
+        found_actions = []
+        # Iterate through all the modules currently loaded
+        for module in list(sys.modules.values()):
+            try:
+                # Find all the classes in the module that inherit from BaseAction
+                found_actions.extend(
+                    [obj for name, obj in inspect.getmembers(module, inspect.isclass) if
+                     issubclass(
+                         obj, base_action.BaseAction
+                     ) and obj != base_action.BaseAction
+                     and obj not in found_actions]
+                )
+            except ImportError:
+                continue
+
+        # Create the actions
+        self._view.valid_actions.clear()
+        self._view.valid_actions.extend([action(api=self) for action in found_actions])
+
+    def _load_extensions(self):
+        """
+        Loads any core and custom extensions found in the sys.modules
+        """
+        # Find all the available extensions
+        found_extensions = []
+        # Iterate through all the modules currently loaded
+        for module in list(sys.modules.values()):
+            try:
+                # Find all the classes in the module that inherit from BaseAction
+                found_extensions.extend(
+                    [obj for name, obj in inspect.getmembers(module, inspect.isclass) if
+                     issubclass(
+                         obj, base_extension.PoseWranglerExtension
+                     ) and obj != base_extension.PoseWranglerExtension
+                     and obj not in found_extensions]
+                )
+            except ImportError:
+                continue
+
+        # Create the extensions
+        self._extensions = [extension(display_view=bool(self._view), api=self) for extension in found_extensions]
+
+        # If we are using the UI, show the actions
+        if self._view:
+            self._view.display_extensions(self._extensions)
+
+    def _load_view(self):
+        """
+        Refresh the UI with the latest solvers
+        """
+        if not self._view:
+            return
+        # If we have a ui, clear it before we load fresh data
+        self._view.clear()
+        # Bool to keep track if we have a solver that has edits to it
+        existing_edit = None
+        # Iterate through all the solvers in the scene
+        for solver in self.rbf_solvers:
+            # Get the solvers edit status
+            edit = self.get_solver_edit_status(solver)
+            # If we have an existing edit and this solver has also been edited
+            if existing_edit is not None and edit:
+                # Finish editing this solver
+                self.edit_solver(edit=False, solver=solver)
+                # Update the edit status accordingly
+                edit = False
+            # Otherwise if no existing edit and we have an edit
+            elif edit:
+                # Store the existing edit
+                existing_edit = solver
+            # Add the solver to the view with its edit status
+            self._view.add_rbf_solver(solver, edit=edit)
+
+    def _set_current_solver(self, solver):
+        """
+        UI Event to update the current solver
+        :param solver :type api.RBFNode: solver reference
+        """
+        self.current_solver = solver
+
+    # noinspection DuplicatedCode
+    def _setup_view_events(self):
+        """
+        Connect up all of the ui signals to their corresponding functions
+        """
+        # Only works if we have a view
+        if not self._view:
+            return
+        # Connect up all the ui events
+        # Solver Events
+        self._view.event_create_solver.connect(self.create_rbf_solver)
+        self._view.event_delete_solver.connect(self.delete_rbf_solver)
+        self._view.event_edit_solver.connect(self.edit_solver)
+        self._view.event_mirror_solver.connect(self.mirror_rbf_solver)
+        self._view.event_refresh_solvers.connect(self._load_view)
+        self._view.event_set_current_solver.connect(self._set_current_solver)
+        # Driver Events
+        self._view.event_add_drivers.connect(self.add_drivers)
+        self._view.event_remove_drivers.connect(self.remove_drivers)
+        self._view.event_export_drivers.connect(self.serialize_to_file)
+        self._view.event_import_drivers.connect(self.deserialize_from_file)
+        # Driven Events
+        self._view.event_add_driven.connect(self.add_driven_transforms)
+        self._view.event_remove_driven.connect(self.remove_driven)
+        # Pose Events
+        self._view.event_add_pose.connect(self.create_pose)
+        self._view.event_delete_pose.connect(self.delete_pose)
+        self._view.event_go_to_pose.connect(self.go_to_pose)
+        self._view.event_mirror_pose.connect(self.mirror_pose)
+        self._view.event_rename_pose.connect(self.rename_pose)
+        self._view.event_update_pose.connect(self.update_pose)
+        self._view.event_mute_pose.connect(self.mute_pose)
+        # Blendshape Events
+        self._view.event_create_blendshape.connect(self.create_blendshape)
+        self._view.event_add_blendshape.connect(self.add_blendshape)
+        self._view.event_edit_blendshape.connect(self.edit_blendshape)
+        # Utility Events
+        self._view.event_get_valid_actions.connect(self._get_valid_actions)
+        self._view.event_select.connect(utils.set_selection)
+        self._view.event_set_mirror_mapping.connect(self.set_mirror_mapping)
+
+if __name__ == '__main__':
+    import ctypes
+
+    from Qt import QtWidgets
+
+    myappid = 'EpicGames.PoseWrangler'
+    ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(myappid)
+    app = QtWidgets.QApplication(sys.argv)
+    tool = UERBFAPI(view=True)
+    app.exec_()

Scripts/Animation/epic_pose_wrangler/v2/model/__init__.py

@@ -0,0 +1,5 @@
+from .actions import (
+    selection,
+    io,
+    zero_pose
+)

Scripts/Animation/epic_pose_wrangler/v2/model/actions/io.py

@@ -0,0 +1,68 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+from epic_pose_wrangler.v2.model import base_action
+
+class ExportSelectedAction(base_action.BaseAction):
+    __display_name__ = "Export Selected Solvers"
+    __tooltip__ = "Exports the currently selected solver nodes in the scene to a JSON file"
+    __category__ = "IO"
+
+    @classmethod
+    def validate(cls, ui_context):
+        return bool(ui_context.current_solvers)
+
+    def execute(self, ui_context=None, **kwargs):
+        from Qt import QtWidgets
+
+        if not ui_context:
+            ui_context = self.api.get_ui_context()
+        if not ui_context:
+            return
+        file_path = QtWidgets.QFileDialog.getSaveFileName(None, "Pose Wrangler File", "", "*.json")[0]
+        # If no path is specified, exit early
+        if file_path == "":
+            return
+        self.api.serialize_to_file(file_path, ui_context.current_solvers)
+
+class ExportAllAction(base_action.BaseAction):
+    __display_name__ = "Export All Solvers"
+    __tooltip__ = "Exports all solver nodes in the scene to a JSON file"
+    __category__ = "IO"
+
+    @classmethod
+    def validate(cls, ui_context):
+        return bool(ui_context.current_solvers)
+
+    def execute(self, ui_context=None, **kwargs):
+        from Qt import QtWidgets
+
+        if not ui_context:
+            ui_context = self.api.get_ui_context()
+        if not ui_context:
+            return
+        file_path = QtWidgets.QFileDialog.getSaveFileName(None, "Pose Wrangler File", "", "*.json")[0]
+        # If no path is specified, exit early
+        if file_path == "":
+            return
+        self.api.serialize_to_file(file_path, None)
+
+class ImportFromFileAction(base_action.BaseAction):
+    __display_name__ = "Import Solvers"
+    __tooltip__ = "Imports solver nodes into the scene from a JSON file"
+    __category__ = "IO"
+
+    @classmethod
+    def validate(cls, ui_context):
+        return bool(ui_context.current_solvers)
+
+    def execute(self, ui_context=None, **kwargs):
+        from Qt import QtWidgets
+
+        if not ui_context:
+            ui_context = self.api.get_ui_context()
+        if not ui_context:
+            return
+        file_path = QtWidgets.QFileDialog.getOpenFileName(None, "Pose Wrangler File", "", "*.json")[0]
+        # If no path is specified, exit early
+        if file_path == "":
+            return
+        self.api.deserialize_from_file(file_path)

Scripts/Animation/epic_pose_wrangler/v2/model/actions/selection.py

@@ -0,0 +1,52 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+from maya import cmds
+
+from epic_pose_wrangler.v2.model import base_action
+
+class SelectSolverAction(base_action.BaseAction):
+    __display_name__ = "Select Solver Node(s)"
+    __tooltip__ = "Selects the currently selected solver nodes in the scene"
+    __category__ = "Select"
+
+    @classmethod
+    def validate(cls, ui_context):
+        return bool(ui_context.current_solvers)
+
+    def execute(self, ui_context=None, **kwargs):
+        if not ui_context:
+            ui_context = self.api.get_ui_context()
+        if not ui_context:
+            return
+        cmds.select(ui_context.current_solvers, replace=True)
+
+class SelectDriverAction(base_action.BaseAction):
+    __display_name__ = "Select Driver Node(s)"
+    __tooltip__ = "Selects the driver nodes in the scene"
+    __category__ = "Select"
+
+    @classmethod
+    def validate(cls, ui_context):
+        return bool(ui_context.drivers)
+
+    def execute(self, ui_context=None, **kwargs):
+        if not ui_context:
+            ui_context = self.api.get_ui_context()
+        if not ui_context:
+            return
+        cmds.select(ui_context.drivers, replace=True)
+
+class SelectDrivenAction(base_action.BaseAction):
+    __display_name__ = "Select Driven Node(s)"
+    __tooltip__ = "Selects the driven nodes in the scene"
+    __category__ = "Select"
+
+    @classmethod
+    def validate(cls, ui_context):
+        return bool(ui_context.driven)
+
+    def execute(self, ui_context=None, **kwargs):
+        if not ui_context:
+            ui_context = self.api.get_ui_context()
+        if not ui_context:
+            return
+        cmds.select(ui_context.driven, replace=True)

Scripts/Animation/epic_pose_wrangler/v2/model/actions/zero_pose.py

@@ -0,0 +1,41 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+from maya import cmds
+from epic_pose_wrangler.v2.model import base_action, pose_blender
+
+class ZeroDefaultPoseAction(base_action.BaseAction):
+    __display_name__ = "Zero Default Pose Transforms"
+    __tooltip__ = ""
+    __category__ = "Utilities"
+
+    @classmethod
+    def validate(cls, ui_context):
+        return bool(ui_context.current_solvers)
+
+    def execute(self, ui_context=None, solver=None, **kwargs):
+        from Qt import QtWidgets
+        if not ui_context:
+            ui_context = self.api.get_ui_context()
+        if ui_context:
+            solver = self.api.get_rbf_solver_by_name(ui_context.current_solvers[-1])
+        if not solver:
+            solver = self.api.current_solver
+
+        # Go to the default pose
+        solver.go_to_pose('default')
+        # Assume edit is enabled
+        edit = True
+        if not self.api.get_solver_edit_status(solver):
+            # If edit isn't enabled, store the current enabled state and enable editing
+            edit = False
+            self.api.edit_solver(edit=True, solver=solver)
+
+        # Reset the driven transforms
+        for node in solver.driven_nodes(type=pose_blender.UEPoseBlenderNode.node_type):
+            cmds.setAttr('{node}.translate'.format(node=node), 0.0, 0.0, 0.0)
+            cmds.setAttr('{node}.rotate'.format(node=node), 0.0, 0.0, 0.0)
+            cmds.setAttr('{node}.scale'.format(node=node), 1.0, 1.0, 1.0)
+
+        # Update the pose
+        self.api.update_pose(pose_name='default', solver=solver)
+        # Restore edit status
+        self.api.edit_solver(edit=edit, solver=solver)

Scripts/Animation/epic_pose_wrangler/v2/model/base_action.py

@@ -0,0 +1,23 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+import abc
+
+class BaseAction(object):
+    __display_name__ = "BaseAction"
+    __tooltip__ = ""
+    __category__ = ""
+
+    @classmethod
+    @abc.abstractmethod
+    def validate(cls, ui_context):
+        raise NotImplementedError
+
+    @abc.abstractmethod
+    def execute(self, ui_context=None, **kwargs):
+        raise NotImplementedError
+
+    def __init__(self, api=None):
+        self._api = api
+
+    @property
+    def api(self):
+        return self._api

Scripts/Animation/epic_pose_wrangler/v2/model/base_extension.py

@@ -0,0 +1,58 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+from epic_pose_wrangler.model import exceptions
+
+class PoseWranglerExtension(object):
+    """
+    Base class for extending pose wrangler with custom utilities that can be dynamically added to the UI
+    """
+    __category__ = ""
+
+    def __init__(self, display_view=False, api=None):
+        super(PoseWranglerExtension, self).__init__()
+        self._display_view = display_view
+        self._view = None
+        self._api = api
+
+    @property
+    def api(self):
+        """
+        Get the current API
+
+        :return: Reference to the main API interface
+        :rtype: pose_wrangler.v2.main.UERBFAPI
+        """
+
+        return self._api
+
+    @property
+    def view(self):
+        """
+        Get the current view widget. This should be overridden by custom extensions if you wish to embed a UI for this
+        extension into the main PoseWrangler UI.
+
+        :return: Reference to the PySide widget associated with this extension
+        :rtype: QWidget or None
+        """
+        return self._view
+
+    def execute(self, context=None, **kwargs):
+        """
+        Generic entrypoint for executing the extension.
+
+        :param: context: pose wrangler context containing current solver and all solvers
+        :type context: pose_wrangler.v2.model.context.PoseWranglerContext or None
+        """
+        raise exceptions.PoseWranglerFunctionalityNotImplemented(
+            "'execute' function has not been implemented for {class_name}".format(
+                class_name=self.__class__.__name__
+            )
+        )
+
+    def on_context_changed(self, new_context):
+        """
+        Context event called when the current solver is set via the API
+
+        :param new_context: pose wrangler context containing current solver and all solvers
+        :type new_context: pose_wrangler.v2.model.context.PoseWranglerContext or None
+        """
+        pass

Scripts/Animation/epic_pose_wrangler/v2/model/context.py

@@ -0,0 +1,13 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+class PoseWranglerContext(object):
+    def __init__(self, current_solver, solvers):
+        self._current_solver = current_solver
+        self._solvers = solvers
+
+    @property
+    def current_solver(self):
+        return self._current_solver
+
+    @property
+    def solvers(self):
+        return self._solvers

Scripts/Animation/epic_pose_wrangler/v2/model/exceptions.py

@@ -0,0 +1,45 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+"""
+API v2 Specific exceptions
+"""
+from epic_pose_wrangler.model import exceptions
+
+class MessageConnectionError(exceptions.PoseWranglerException):
+    """
+    Raised when message connections fail.
+    """
+
+class InvalidSolverError(exceptions.PoseWranglerException):
+    """
+    Raised when the incorrect solver type is specified
+    """
+
+class InvalidNodeType(exceptions.PoseWranglerException, TypeError):
+    """
+    Raised when the incorrect node type is specified
+    """
+
+class PoseWranglerAttributeError(exceptions.PoseWranglerException, AttributeError):
+    """
+    Raised when there is an issue getting/setting an attribute
+    """
+
+class PoseBlenderPoseError(exceptions.PoseWranglerException):
+    """
+    Generic error for issues with poses
+    """
+
+class InvalidPose(exceptions.PoseWranglerException):
+    """
+    Generic error for incorrect poses
+    """
+
+class InvalidPoseIndex(exceptions.PoseWranglerException):
+    """
+    Raised when issues arise surrounding the poses index
+    """
+
+class BlendshapeError(exceptions.PoseWranglerException):
+    """
+    Generic error for blendshape issues
+    """

Scripts/Animation/epic_pose_wrangler/v2/model/export.py

@@ -0,0 +1,325 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+import os
+import json
+from maya import cmds
+
+from special_projects.publish_tools.fbx_cmd import fbx_export
+from special_projects.publish_tools.utils import find_top_joints
+
+from special_projects.rigging.rbf_node import RBFNode
+
+class RBFNodeExporter(object):
+    """
+    Utility class to export a RBFsolver node, exports a JSON and FBX
+    
+    >>> from special_projects.rigging.rbf_node.export import RBFNodeExporter
+    >>> node = 'my_UE4RBFSolver_node'
+    >>> asset_name = 'my_asset_name'
+    >>> export_directory = 'my:/export/directory'
+    >>> exporter = RBFNodeExporter(node, asset_name, export_directory)
+    >>> exporter.export()
+
+    Result:
+        export_directory/node.json
+        export_directory/node.fbx
+    """
+
+    def __init__(self, node, asset_name, export_directory):
+        """
+        Initialize RBF Exporter
+        """
+
+        self.set_node(node)
+        self.set_asset_name(asset_name)
+        self.set_export_directory(export_directory)
+        self._set_fbx_export_path()
+        self._set_json_export_path()
+
+    def node(self):
+        return self._node
+
+    def set_node(self, node):
+
+        if not cmds.objectType(node, isAType=RBFNode.node_type):
+            raise TypeError('Invalid "{}" node: "{}"'.format(RBFNode.node_type, node))
+
+        self._node = RBFNode(node)
+
+    def asset_name(self):
+        return self._asset_name
+
+    def set_asset_name(self, asset_name):
+        self._asset_name = asset_name
+
+    def export_directory(self):
+        return self._export_directory
+
+    def set_export_directory(self, directory):
+        if os.path.isdir(directory) and os.path.exists(directory):
+            self._export_directory = directory
+        else:
+            raise IOError('Export directory "{}" does not exists'.format(directory))
+
+    def fbx_export_path(self):
+        return self._fbx_export_path
+
+    def _set_fbx_export_path(self):
+        self._fbx_export_path = os.path.join(self._export_directory, '{}.fbx'.format(self._node))
+
+    def json_export_path(self):
+        return self._json_export_path
+
+    def _set_json_export_path(self):
+        self._json_export_path = os.path.join(self._export_directory, '{}.json'.format(self._node))
+
+    # -------------------------------------------------------------------------------------
+
+    def export(self):
+        """
+        Exports FBX and sidecar JSON file
+        """
+
+        self.fbx_export()
+        self.json_export()
+
+    def json_export(self):
+        """
+        Exports JSON sidecar
+        """
+
+        self.node().name_unnamed_poses()
+
+        config = self._node.data()
+        config['export_fbx'] = self.fbx_export_path()
+        config['asset_name'] = self.asset_name()
+
+        with open(self.json_export_path(), 'w') as outfile:
+            json.dump(config, outfile, sort_keys=0, indent=4, separators=(",", ":"))
+
+    def fbx_export(self):
+        """
+        Exports baked poses to FBX
+        """
+
+        self.node().name_unnamed_poses()
+
+        self.bake_poses()
+        cmds.select(self.root_joint())
+        fbx_export(self.fbx_export_path(),
+                   animation=True,
+                   bake_complex_animation=True,
+                   bake_complex_start=0,
+                   bake_complex_end=cmds.playbackOptions(q=True, maxTime=True),
+                   up_axis='z')
+
+    # -------------------------------------------------------------------------------------
+
+    def blendshape_nodes(self):
+        """
+        Finds blendshape nodes from driven attributes
+        """
+
+        driven_attributes = self._node.driven_attributes(type='blendShape')
+
+        blendshape_nodes = list()
+        for output in driven_attributes:
+            for attribute in output:
+                blendshape_nodes.append(attribute.split('.')[0])
+
+        return list(set(blendshape_nodes))
+
+    def meshes(self):
+        """
+        Finds meshes from blendshape nodes
+        """
+
+        meshes = list()
+
+        blendShapes = self.blendshape_nodes()
+        if blendShapes:
+            for blendShape in blendShapes:
+                meshes.extend(cmds.deformer(blendShape, q=True, geometry=True))
+
+            meshes = list(set(meshes))
+            meshes = cmds.listRelatives(meshes, parent=True)
+
+        return meshes
+
+    def root_joint(self):
+        """
+        Finds root joint from meshes
+        """
+
+        meshes = self.meshes()
+        if meshes:
+            skeleton = list()
+            for mesh in meshes:
+                skin_cluster = cmds.ls(cmds.findDeformers(mesh), type='skinCluster')
+                if skin_cluster:
+                    skin_cluster = skin_cluster[0]
+                    influences = cmds.skinCluster(skin_cluster, q=True, inf=True)
+                    if influences:
+                        skeleton.extend(influences)
+                    else:
+                        raise RuntimeError('No influences found for "{}"'.format(skin_cluster))
+                else:
+                    cmds.warning('No skinCluster found for "{}"'.format(mesh))
+
+            root_joints = find_top_joints(skeleton)
+
+        else:
+            skeleton = self._node.drivers()
+            # for driver in self._node.drivers():
+            # driven = driver.replace('_drv', '')
+            # if cmds.objExists(driven):
+            #    skeleton.append(driven)
+
+            root_joints = find_top_joints(skeleton)
+
+        if not root_joints:
+            raise RuntimeError('No root joint found for "{}"'.format(self._node))
+
+        return root_joints[0]
+
+    def add_root_attributes(self, root_joint):
+        """
+        Adds RBFNode driven attributes to root_joint
+        """
+
+        pose_root_attributes = dict()
+
+        poses = self._node.poses()
+        for pose in poses:
+            driven_attributes = self._node.pose_driven_attributes(pose)  # add type flag!
+            current_pose = list()
+            for attribute in driven_attributes:
+                node, target = attribute.split('.')
+                root_attribute = '{}.{}'.format(root_joint, target)
+                if root_attribute not in current_pose:
+                    if not cmds.objExists(root_attribute):
+                        cmds.addAttr(root_joint, ln=target, at='double', k=True)
+                    else:
+                        input_connection = cmds.listConnections(root_attribute, s=True, d=False, plugs=True)
+                        if input_connection:
+                            cmds.disconnectAttr(input_connection[0], root_attribute)
+
+                    # cmds.connectAttr(attribute, root_attribute)
+                    current_pose.append(root_attribute)
+
+            pose_root_attributes[pose] = current_pose
+
+        return pose_root_attributes
+
+    def bake_poses(self):
+        """
+        Bakes the RBFNode poses in the timeline for FBX export
+        """
+
+        for anim_curve_type in ['animCurveTL', 'animCurveTA', 'animCurveTU']:
+            cmds.delete(cmds.ls(type=anim_curve_type))
+
+        pose_root_attributes = self.add_root_attributes(self.root_joint())
+
+        for frame, pose in enumerate(self._node.poses()):
+
+            # go to pose
+            self._node.go_to_pose(pose)
+
+            # key controllers
+            if self._node.num_controllers():
+                for controller in self._node.controllers():
+                    cmds.setKeyframe(controller, t=frame, inTangentType='linear', outTangentType='step')
+
+            # or key drivers
+            else:
+                for driver in self._node.drivers():
+                    cmds.setKeyframe(driver, t=frame, inTangentType='linear', outTangentType='step')
+
+            root_attributes = pose_root_attributes.get(pose, [])
+
+            for root_attribute in root_attributes:
+
+                input_connection = cmds.listConnections(root_attribute, s=True, d=False, plugs=True)
+                if input_connection:
+                    cmds.disconnectAttr(input_connection[0], root_attribute)
+
+                # Key Driven Before/After
+                cmds.setAttr(root_attribute, 0)
+
+                if frame == len(self._node.poses()) - 1:
+                    cmds.setKeyframe(root_attribute, t=(frame - 1), inTangentType='linear', outTangentType='linear')
+                else:
+                    cmds.setKeyframe(root_attribute, t=((frame - 1), (frame + 1)), inTangentType='linear',
+                                     outTangentType='linear')
+
+                # Key Driven
+                cmds.setAttr(root_attribute, 1)
+                cmds.setKeyframe(root_attribute, t=frame, inTangentType='linear', outTangentType='linear')
+
+        # set start-end frames
+        end_frame = len(self._node.poses()) - 1
+        cmds.playbackOptions(minTime=0, maxTime=end_frame, animationStartTime=0, animationEndTime=end_frame)
+        cmds.dgdirty(a=True)
+
+class RBFPoseExporterBatch(object):
+    """
+    Utility class to export multiple RBFsolver nodes, exports a JSON and FBX for each solver
+
+    >>> solvers = cmds.ls(type='UE4RBFSolverNode')
+    >>> rig_scene = r'D:\Build\UE5_Main\Collaboration\Frosty\ArtSource\Character\Hero\Kenny\Rig\Kenny_Rig.ma'
+    >>> export_directory = r'D:\test\class'
+    >>> asset_name = 'Kenny'
+    >>> rbf_exporter_batch = RBFPoseExporterBatch(solvers, asset_name, export_directory, rig_scene)
+
+    Result:
+        export_directory/node1.json
+        export_directory/node1.fbx
+        export_directory/node2.json
+        export_directory/node2.fbx
+    """
+
+    def __init__(self, nodes, asset_name, export_directory, rig_scene):
+        self.set_pose_exporter(nodes, asset_name, export_directory)
+        self.set_rig_scene(rig_scene)
+
+    def pose_exporter(self):
+        return self._poseExporter
+
+    def asset_name(self):
+        return self._asset_name
+
+    def export_directory(self):
+        return self._export_directory
+
+    def set_pose_exporter(self, nodes, asset_name, export_directory):
+        if not hasattr(nodes, '__iter__'):
+            nodes = [nodes]
+
+        exporters = list()
+        for node in nodes:
+            if cmds.objectType(node, isAType=RBFNodeExporter.node_type):
+                exporters.append(RBFNodeExporter(node, asset_name, export_directory))
+
+        if not len(exporters):
+            raise RuntimeError('No valid {} objects found'.format(RBFNodeExporter.node_type))
+
+        self._poseExporter = exporters
+        self._asset_name = asset_name
+        self._export_directory = export_directory
+
+    def rig_scene(self):
+        return self._rig_scene
+
+    def set_rig_scene(self, rig_scene):
+        if not os.path.exists(rig_scene):
+            raise IOError('Rig scene "{}" does not exists'.format(rig_scene))
+
+        self._rig_scene = rig_scene
+
+    # -------------------------------------------------------------------------------------
+
+    def export(self, run_in_subprocess=True):
+        # TO-DO: Implement run_in_subprocess
+        for exporter in self.pose_exporter():
+            cmds.file(self.rig_scene(), open=True, force=True)
+            exporter.export()

Scripts/Animation/epic_pose_wrangler/v2/model/pose_blender.py

@@ -0,0 +1,501 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+
+import copy
+
+from maya import cmds
+from maya.api import OpenMaya as om
+
+from epic_pose_wrangler.log import LOG
+from epic_pose_wrangler.v2.model import exceptions, utils
+
+class UEPoseBlenderNode(object):
+    """
+    Class wrapper for UEPoseBlenderNode
+    """
+    node_type = 'UEPoseBlenderNode'
+
+    @classmethod
+    def create(cls, driven_transform=None):
+        """
+        Create Pose Blender Node
+        >>> new_node = UEPoseBlenderNode.create()
+        """
+        name = driven_transform
+        # If no name is specified, generate unique name
+        if name is None:
+            name = '{name}#'.format(name=cls.node_type)
+        name += "_{class_name}".format(class_name=cls.__name__)
+        # Create node
+        node = cmds.createNode(cls.node_type, name=name)
+        node_ref = cls(node)
+        # If a driving transform is specified, connect it via a message attribute and set the base pose
+        if driven_transform is not None:
+            utils.message_connect(
+                from_attribute="{node}.drivenTransform".format(node=node),
+                to_attribute="{transform}.poseBlender".format(transform=driven_transform)
+            )
+            # Set the base pose
+            node_ref.base_pose = cmds.xform(driven_transform, query=True, objectSpace=True, matrix=True)
+        # Return the new UEPoseBlenderNode reference
+        return node_ref
+
+    @classmethod
+    def find_all(cls):
+        """
+        Returns all PoseBlender nodes in scene
+        """
+        return [cls(node) for node in cmds.ls(type=cls.node_type)]
+
+    @classmethod
+    def find_by_name(cls, name):
+        """
+        Find a UEPoseBlenderNode class with the specified name
+        :param name :type str: name of the node
+        :return :type UEPoseBlenderNode or None:
+        """
+        if not name.endswith(cls.node_type):
+            name += "_{node_type}".format(node_type=cls.node_type)
+        match = cmds.ls(name, type=cls.node_type)
+        return cls(match[0]) if match else None
+
+    @classmethod
+    def find_by_transform(cls, transform):
+        """
+        Finds a UEPoseBlenderNode class connected to the specified joint
+        :param transform :type str: name of the transform
+        :return :type UEPoseBlenderNode or None
+        """
+        if not cmds.attributeQuery('poseBlender', node=transform, exists=True):
+            return
+        connections = cmds.listConnections('{transform}.poseBlender'.format(transform=transform))
+        if not connections:
+            return
+        return cls(connections[0])
+
+    def __init__(self, node):
+        # If the node doesn't exist, raise an exception
+        if not cmds.objectType(node, isAType=self.node_type):
+            raise exceptions.InvalidNodeType(
+                'Invalid "{node_type}" node: "{node_name}"'.format(
+                    node_type=self.node_type,
+                    node_name=node
+                )
+            )
+        # Store a reference ot the MObject in case the name of the node is changed whilst this class is still in use
+        self._node = om.MFnDependencyNode(om.MGlobal.getSelectionListByName(node).getDependNode(0))
+
+    def __repr__(self):
+        """
+        Returns class string representation
+        """
+        return '<{node_type}>: {object}'.format(node_type=self.node_type, object=self)
+
+    def __str__(self):
+        """
+        Returns class as string
+        """
+        return str(self.node)
+
+    def __eq__(self, other):
+        """
+        Returns if two objects are the same, allows for comparing two different UEPoseBlenderNode references that wrap
+        the same MObject
+        """
+        return str(self) == str(other)
+
+    def __enter__(self):
+        """
+        Override the __enter__ to allow for this class to be used as a context manager to toggle edit mode
+        >>> pose_blender = UEPoseBlenderNode('TestPoseBlenderNode')
+        >>> with pose_blender:
+        >>>     # Edit mode enabled so changes can be made
+        >>>     pass
+        >>> # Edit mode is now disabled
+        """
+        self.edit = True
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        """
+        On exit, disable edit mode
+        """
+        self.edit = not self.edit
+
+    @property
+    def node(self):
+        return self._node.name()
+
+    @property
+    def rbf_solver_attr(self):
+        return '{node}.rbfSolver'.format(node=self.node)
+
+    @property
+    def base_pose_attr(self):
+        return '{node}.basePose'.format(node=self.node)
+
+    @property
+    def envelope_attr(self):
+        return '{node}.envelope'.format(node=self.node)
+
+    @property
+    def in_matrix_attr(self):
+        return '{node}.inMatrix'.format(node=self.node)
+
+    @property
+    def out_matrix_attr(self):
+        return '{node}.outMatrix'.format(node=self.node)
+
+    @property
+    def poses_attr(self):
+        return '{node}.poses'.format(node=self.node)
+
+    @property
+    def weights_attr(self):
+        return '{node}.weights'.format(node=self.node)
+
+    @property
+    def driven_transform(self):
+        """
+        Get the current driven transform
+        :return :type str: transform node name
+        """
+        if cmds.attributeQuery('drivenTransform', node=self.node, exists=True):
+            transforms = cmds.listConnections("{node}.drivenTransform".format(node=self.node))
+            if transforms:
+                return transforms[0]
+
+    @property
+    def edit(self):
+        """
+        :return :type bool: are the driven transforms connected to this node editable?
+        """
+        transform = self.driven_transform
+        # If no transform, we can edit!
+        if not transform:
+            return True
+        # False if we have any matrix connections, otherwise we have no connections and can edit
+        return False if cmds.listConnections(self.out_matrix_attr) else True
+
+    @edit.setter
+    def edit(self, value):
+        """
+        Allow the driven transforms to be edited (or not)
+        :param value :type bool: edit mode enabled True/False
+        """
+        # If we don't have a driven transform we can't do anything
+        transform = self.driven_transform
+        if not transform:
+            return
+        # If we are in edit mode, disable out connections
+        if bool(value):
+            self.out_matrix = None
+        # Otherwise connect up the transform
+        else:
+            self.out_matrix = transform
+
+    @property
+    def rbf_solver(self):
+        """
+        :return:The connected rbf solver node if it exists
+        """
+        from epic_pose_wrangler.v2.model import api
+        # Check the attr exists
+        exists = cmds.attributeQuery(self.rbf_solver_attr.split('.')[-1], node=self.node, exists=True)
+        # Query the connections
+        connections = cmds.listConnections(self.rbf_solver_attr)
+        # Return the node if the attr exists and a connection is found
+        return api.RBFNode(connections[0]) if exists and connections else None
+
+    @rbf_solver.setter
+    def rbf_solver(self, rbf_solver_attr):
+        """
+        Connects up this node to an rbf solver node
+        :param rbf_solver_attr: the attribute on the rbf solver to connect this to i.e my_rbf_solver.poseBlend_back_120
+        """
+        utils.message_connect(rbf_solver_attr, self.rbf_solver_attr)
+
+    @property
+    def base_pose(self):
+        """
+        :return :type list: matrix
+        """
+        return self.get_pose(index=0)
+
+    @base_pose.setter
+    def base_pose(self, matrix):
+        """
+        Set the base pose to a specific pose.PoseNode
+        :param matrix :type list: Matrix to set as base pose
+        """
+        # Connect up the pose's outputLocalMatrix to the basePose plug
+        utils.set_attr_or_connect(source_attr_name=self.base_pose_attr, value=matrix, attr_type='matrix')
+        # Set the inMatrix to the basePose plug
+        self.in_matrix = matrix
+        # Set the first pose in the pose list to the new base pose
+        self.set_pose(index=0, overwrite=True, matrix=matrix)
+
+    @property
+    def envelope(self):
+        """
+        Get the value of the envelope attr from this node
+        """
+        return utils.get_attr(self.envelope_attr, as_value=True)
+
+    @envelope.setter
+    def envelope(self, value):
+        """
+        Sets the envelope
+        :param value: float, int or string (i.e node.attributeName). Float/Int will set the value, whilst
+        passing an attribute will connect the plugs
+        """
+        if isinstance(value, float) or isinstance(value, int) and 0 > value > 1:
+            value = min(max(0.0, value), 1.0)
+        utils.set_attr_or_connect(source_attr_name=self.envelope_attr, value=value)
+
+    @property
+    def in_matrix(self):
+        """
+        Get the inMatrix value
+        :return: matrix or attributeName
+        """
+        # Get the current value of the attribute
+        return utils.get_attr(self.in_matrix_attr, as_value=True)
+
+    @in_matrix.setter
+    def in_matrix(self, value):
+        """
+        Sets the inMatrix attribute to a value or connects it to another matrix plug
+        :param value: matrix (list) or string node.attributeName
+        """
+        utils.set_attr_or_connect(source_attr_name=self.in_matrix_attr, value=value, attr_type='matrix')
+
+    @property
+    def out_matrix(self):
+        """
+        :return:
+        """
+        return cmds.getAttr(self.out_matrix_attr)
+
+    @out_matrix.setter
+    def out_matrix(self, transform_name=None):
+        """
+        Connect the output matrix up to a given transform node
+        :param transform_name: name of a transform node to connect to
+        """
+        # If a transform is specified, connect it
+        current_selection = cmds.ls(selection=True)
+        if transform_name:
+            # Check that the node type is a transform
+            if not cmds.ls(transform_name, type='transform'):
+                # If its not a transform raise an error
+                raise exceptions.InvalidNodeType(
+                    "Invalid node type. Expected 'transform', received '{node_type}'".format(
+                        node_type=cmds.objectType(transform_name)
+                    )
+                )
+            # Create a new decomposeMatrix node to convert the outMatrix to T,R,S
+            mx_decompose_node = cmds.createNode('decomposeMatrix', name="{node}_mx_decompose#".format(node=self.node))
+            # Connect the outMatrix up to the decomposeMatrix's input
+            cmds.connectAttr(self.out_matrix_attr, '{node}.inputMatrix'.format(node=mx_decompose_node))
+            # Create an iterator with TRS attributes
+            attributes = ('translate', 'rotate', 'scale')
+            # Iterate through each attr and connect it
+            for attr in attributes:
+                out_attr = '{mx_decompose_node}.output{attr}'.format(
+                    mx_decompose_node=mx_decompose_node,
+                    attr=attr.capitalize()
+                )
+                in_attr = '{node_name}.{attr}'.format(node_name=transform_name, attr=attr)
+                cmds.connectAttr(out_attr, in_attr, force=True)
+        else:
+            # No transform was specified, disconnect all existing connections
+            connections = cmds.listConnections(self.out_matrix_attr, type='decomposeMatrix')
+            current_matrix = cmds.xform(self.driven_transform, query=True, matrix=True, objectSpace=True)
+            if connections:
+                cmds.delete(connections)
+            for connection in cmds.listConnections(self.out_matrix_attr, plugs=True) or []:
+                cmds.disconnectAttr(self.out_matrix_attr, connection)
+            cmds.xform(self.driven_transform, matrix=current_matrix, objectSpace=True)
+        cmds.select(current_selection, replace=True)
+
+    def get_pose(self, index=-1):
+        """
+        Get the pose at the specified index
+        :param index :type int: index to query
+        :return :type list matrix or None
+        """
+        # Get the value of the pose_attr at the specified index
+        return utils.get_attr(
+            '{poses_attr}[{index}]'.format(poses_attr=self.poses_attr, index=index),
+            as_value=True
+        )
+
+    def get_poses(self):
+        """
+        :return :type list of matrices
+        """
+        # TODO update this when the weight + name get added
+        return utils.get_attr_array(attr_name=self.poses_attr, as_value=True)
+
+    def add_pose_from_current(self, pose_name, index=-1):
+        """
+        Add a pose from the current transforms positions
+        :param pose_name :type str: name of the pose
+        :param index :type int: target index for the pose
+        """
+        # Find the next index if no index is specified
+        if index < 0:
+            # If the index is less than 0 find the next available index
+            index = len(cmds.getAttr(self.poses_attr, multiIndices=True) or [0]) - 1
+        # Store driven transform in var to reduce number of cmds calls
+        driven_transform = self.driven_transform
+        if not driven_transform:
+            raise exceptions.PoseBlenderPoseError(
+                "No driven transform associated with this node, "
+                "unable to get the current matrix"
+            )
+        # Get the local matrix for the driven transform
+        local_matrix = cmds.xform(driven_transform, query=True, objectSpace=True, matrix=True)
+        # Set the pose
+        self.set_pose(index=index, pose_name=pose_name, matrix=local_matrix)
+
+    def set_pose(self, index=-1, pose_name="", overwrite=True, matrix=None):
+        """
+        Set a pose for the specified index
+        :param index: int value of the index to set
+        :param pose_name: name of the pose as a string
+        :param overwrite: should it overwrite any existing pose at the index or insert
+        :param matrix: matrix value to set
+        """
+        # Find the next index if no index is specified
+        if index < 0:
+            if pose_name:
+                LOG.warning("Set Pose has not been implemented to support a pose name. FIXME")
+                return
+            else:
+                # If the index is less than 0 find the next available index
+                index = len(cmds.getAttr(self.poses_attr, multiIndices=True) or [0]) - 1
+
+        # If no matrix is specified, grab the matrix for the driven transform
+        if matrix is None:
+            matrix = cmds.xform(self.driven_transform, query=True, matrix=True, objectSpace=True)
+
+        # TODO add in support for inserting into the pose list
+        if not overwrite:
+            pose_count = len(cmds.getAttr(self.poses_attr, multiIndices=True) or [])
+            if pose_count - 1 > index:
+                pass
+
+        # Generate the source attribute (the attribute on this node) from the default attr and given index
+        source_attr_name = '{poses_attr}[{index}]'.format(poses_attr=self.poses_attr, index=index)
+        # Set the pose
+        utils.set_attr_or_connect(source_attr_name=source_attr_name, value=matrix, attr_type='matrix')
+
+    def go_to_pose(self, index=-1):
+        """
+        Move the driven transform to the matrix stored in the pose list at the specified index
+        :param index :type index: index to go to
+        """
+        # Get the matrix at the specified index
+        pose_matrix = self.get_pose(index=index)
+        # Assume the position
+        cmds.xform(self.driven_transform, matrix=pose_matrix)
+
+    def delete_pose(self, index=-1, pose_name=""):
+        """
+        Delete a pose at the specified index or with the given name
+        :param index :type int: index to delete or -1 to use pose_name
+        :param pose_name :type str: pose name to delete
+        """
+        # TODO Delete pose will need to remember enabled state + reconnect up pose_name connection when the changes are
+        #  made to the solver. Currently can't delete by pose name because there is nothing tying an index to a pose
+        #  name
+        # If no index and no pose name, raise exception
+        if index < 0 and not pose_name:
+            raise exceptions.InvalidPoseIndex("Unable to delete pose")
+
+        # Copy a list of the poses
+        poses = copy.deepcopy(self.get_poses())
+
+        # Iterate through the existing poses in reverse
+        for i in reversed(range(len(poses))):
+            # Remove the pose from the list of targets
+            cmds.removeMultiInstance('{blender}.poses[{index}]'.format(blender=self, index=i), b=True)
+
+        # Remove the pose at the given index
+        poses.pop(index)
+
+        # Re-add all the deleted poses (minus the one we popped)
+        for pose_index, matrix in enumerate(poses):
+            self.set_pose(index=pose_index, matrix=matrix)
+
+    def get_weight(self, index, as_float=True):
+        """
+        Get the current weight for the specified index
+        :param index :type int
+        :param as_float :type bool: return as float or as attribute name of the connected plug
+        :return: float or plug
+        """
+        return utils.get_attr('{weights}[{index}]'.format(weights=self.weights_attr, index=index), as_value=as_float)
+
+    def get_weights(self, as_float=True):
+        """
+        Get all the weights associated with this node
+        :param as_float :type bool: as list of floats or list of plugs
+        :return: list of floats or plugs
+        """
+        return utils.get_attr_array(attr_name=self.weights_attr, as_value=as_float)
+
+    def set_weight(self, index=-1, in_float_attr="", float_value=0.0):
+        """
+        Set the weight at a given index either by connecting an attribute or specifying a float value
+        :param index :type int: index to set
+        :param in_float_attr :type str: node.attributeName to connect to this plug
+        :param float_value :type float: float value to set
+        """
+        if index < 0:
+            # If the index is less than 0 find the next available index
+            index = len(cmds.getAttr(self.weights_attr, multiIndices=True) or [0]) - 1
+        # Generate the correct source attr name for the index specified
+        source_attr_name = '{weights}[{index}]'.format(weights=self.weights_attr, index=index)
+        # Set the array element to either the attr or the float value
+        utils.set_attr_or_connect(source_attr_name=source_attr_name, value=in_float_attr or float_value)
+
+    def set_weights(self, in_float_array_attr="", floats=None):
+        """
+        Set multiple weights either by an attribute array string or a float list.Will overwrite existing values
+        :param in_float_array_attr :type str: node.attributeName array attribute to connect all indices with
+        :param floats :type list: list of float values to set for each corresponding index
+        """
+        # Prioritize plugs over setting floats
+        if in_float_array_attr:
+            # Iterate through all the indices in the array
+            for i in range(len(cmds.getAttr(in_float_array_attr, multiIndices=True) or [0])):
+                # Generate the source attr name
+                in_float_attr = "{array_attr}[{index}]".format(array_attr=in_float_array_attr, index=i)
+                # Set the weight for the current index
+                self.set_weight(index=i, in_float_attr=in_float_attr)
+        elif floats:
+            # Iterate through the floats
+            for index, float_value in enumerate(floats):
+                # Set the weight for the current index
+                self.set_weight(index=index, float_value=float_value)
+
+    def delete(self):
+        """
+        Delete the node associated with this wrapper
+        """
+        # If we aren't in edit mode we still have connections made to decomposeMatrix nodes that we want to delete
+        if not self.edit:
+            # Enable edit mode to delete those decomposeMatrix nodes
+            self.edit = True
+        # Disconnect all attrs
+        destination_conns = cmds.listConnections(self, plugs=True, connections=True, source=False) or []
+        for i in range(0, len(destination_conns), 2):
+            cmds.disconnectAttr(destination_conns[i], destination_conns[i + 1])
+        source_conns = cmds.listConnections(self, plugs=True, connections=True, destination=False) or []
+
+        for i in range(0, len(source_conns), 2):
+            # we have to flip these because the output is always node centric and not connection centric
+            cmds.disconnectAttr(source_conns[i + 1], source_conns[i])
+        # Delete the node
+        cmds.delete(self.node)

Scripts/Animation/epic_pose_wrangler/v2/model/utils.py

@@ -0,0 +1,297 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+import math
+import traceback
+
+from maya import OpenMaya, cmds
+
+from epic_pose_wrangler.log import LOG
+from epic_pose_wrangler.v2.model import exceptions
+
+# NOTE: MTransformationMatrix & MEulerRotation have different values for the same axis.
+XFORM_ROTATION_ORDER = {
+    'xyz': OpenMaya.MTransformationMatrix.kXYZ,
+    'yzx': OpenMaya.MTransformationMatrix.kYZX,
+    'zxy': OpenMaya.MTransformationMatrix.kZXY,
+    'xzy': OpenMaya.MTransformationMatrix.kXZY,
+    'yxz': OpenMaya.MTransformationMatrix.kYXZ,
+    'zyx': OpenMaya.MTransformationMatrix.kZYX
+}
+
+EULER_ROTATION_ORDER = {
+    'xyz': OpenMaya.MEulerRotation.kXYZ,
+    'yzx': OpenMaya.MEulerRotation.kYZX,
+    'zxy': OpenMaya.MEulerRotation.kZXY,
+    'xzy': OpenMaya.MEulerRotation.kXZY,
+    'yxz': OpenMaya.MEulerRotation.kYXZ,
+    'zyx': OpenMaya.MEulerRotation.kZYX
+}
+
+def compose_matrix(position, rotation, rotation_order='xyz'):
+    """
+    Compose a 4x4 matrix with given transformation.
+
+    >>> compose_matrix((0.0, 0.0, 0.0), (90.0, 0.0, 0.0))
+    [1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, -1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0]
+    """
+
+    # create rotation ptr
+    rot_script_util = OpenMaya.MScriptUtil()
+    rot_script_util.createFromDouble(*[deg * math.pi / 180.0 for deg in rotation])
+    rot_double_ptr = rot_script_util.asDoublePtr()
+
+    # construct transformation matrix
+    xform_matrix = OpenMaya.MTransformationMatrix()
+    xform_matrix.setTranslation(OpenMaya.MVector(*position), OpenMaya.MSpace.kTransform)
+    xform_matrix.setRotation(rot_double_ptr, XFORM_ROTATION_ORDER[rotation_order], OpenMaya.MSpace.kTransform)
+
+    matrix = xform_matrix.asMatrix()
+    return [matrix(m, n) for m in range(4) for n in range(4)]
+
+def decompose_matrix(matrix, rotation_order='xyz'):
+    """
+    Decomposes a 4x4 matrix into translation and rotation.
+
+    >>> decompose_matrix([1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, -1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0])
+    ((0.0, 0.0, 0.0), (90.0, 0.0, 0.0))
+    """
+
+    mmatrix = OpenMaya.MMatrix()
+    OpenMaya.MScriptUtil.createMatrixFromList(matrix, mmatrix)
+
+    # create transformation matrix
+    xform_matrix = OpenMaya.MTransformationMatrix(mmatrix)
+
+    # get translation
+    translation = xform_matrix.getTranslation(OpenMaya.MSpace.kTransform)
+
+    # get rotation
+    # @ref: https://github.com/LumaPictures/pymel/blob/master/pymel/core/datatypes.py
+    # The apicls getRotation needs a "RotationOrder &" object, which is impossible to make in python...
+    euler_rotation = xform_matrix.eulerRotation()
+    euler_rotation.reorderIt(EULER_ROTATION_ORDER[rotation_order])
+    rotation = euler_rotation.asVector()
+
+    return (
+        (translation.x, translation.y, translation.z),
+        (rotation.x * 180.0 / math.pi, rotation.y * 180.0 / math.pi, rotation.z * 180.0 / math.pi)
+    )
+
+def euler_to_quaternion(rotation, rotation_order='xyz'):
+    """
+    Returns Euler Rotation as Quaternion
+
+    >>> euler_to_quaternion((90, 0, 0))
+    (0.7071, 0.0, 0.0, 0.70710))
+    """
+    euler_rotation = OpenMaya.MEulerRotation(
+        rotation[0] * math.pi / 180.0,
+        rotation[1] * math.pi / 180.0,
+        rotation[2] * math.pi / 180.0
+    )
+    euler_rotation.reorderIt(EULER_ROTATION_ORDER[rotation_order])
+
+    quat = euler_rotation.asQuaternion()
+    return quat.x, quat.y, quat.z, quat.w
+
+def quaternion_to_euler(rotation, rotation_order='xyz'):
+    """
+    Returns Quaternion Rotation as Euler
+
+    quaternion_to_euler((0.7071, 0.0, 0.0, 0.70710))
+    (90, 0, 0)
+    """
+    quat = OpenMaya.MQuaternion(*rotation)
+    euler_rotation = quat.asEulerRotation()
+    euler_rotation.reorderIt(EULER_ROTATION_ORDER[rotation_order])
+
+    return euler_rotation.x * 180.0 / math.pi, euler_rotation.y * 180.0 / math.pi, euler_rotation.z * 180.0 / math.pi
+
+def is_connected_to_array(attribute, array_attr):
+    """
+    Check if the attribute is connected to the specified array
+    :param attribute :type str: attribute
+    :param array_attr :type str array attribute
+    :return :type int or None: int of index in the array or None
+    """
+    try:
+        indices = cmds.getAttr(array_attr, multiIndices=True) or []
+    except ValueError:
+        return None
+    for i in indices:
+        attr = '{from_attr}[{index}]'.format(from_attr=array_attr, index=i)
+        if attribute in (cmds.listConnections(attr, plugs=True) or []):
+            return i
+    return None
+
+def get_next_available_index_in_array(attribute):
+    # Get the next available index
+    indices = cmds.getAttr(attribute, multiIndices=True) or []
+    i = 0
+    for index in indices:
+        if index != i and i not in indices:
+            indices.append(i)
+        i += 1
+    indices.sort()
+    attrs = ['{from_attr}[{index}]'.format(from_attr=attribute, index=i) for i in indices]
+    connections = [cmds.listConnections(attr, plugs=True) or [] for attr in attrs]
+    target_index = len(indices)
+    for index, conn in enumerate(connections):
+        if not conn:
+            target_index = index
+            break
+    return target_index
+
+def message_connect(from_attribute, to_attribute, in_array=False, out_array=False):
+    """
+    Create and connect a message attribute between two nodes
+    """
+    # Generate the object and attr names
+    from_object, from_attribute_name = from_attribute.split('.', 1)
+    to_object, to_attribute_name = to_attribute.split('.', 1)
+
+    # If the attributes don't exist, create them
+    if not cmds.attributeQuery(from_attribute_name, node=from_object, exists=True):
+        cmds.addAttr(from_object, longName=from_attribute_name, attributeType='message', multi=in_array)
+    if not cmds.attributeQuery(to_attribute_name, node=to_object, exists=True):
+        cmds.addAttr(to_object, longName=to_attribute_name, attributeType='message', multi=out_array)
+    # Check that both attributes, if existing are message attributes
+    for a in (from_attribute, to_attribute):
+        if cmds.getAttr(a, type=1) != 'message':
+            raise exceptions.MessageConnectionError(
+                'Message Connect: Attribute {attr} is not a message attribute. CONNECTION ABORTED.'.format(
+                    attr=a
+                )
+            )
+    # Connect up the attributes
+    try:
+        if in_array:
+            from_attribute = "{from_attribute}[{index}]".format(
+                from_attribute=from_attribute,
+                index=get_next_available_index_in_array(from_attribute)
+            )
+
+        if out_array:
+            to_attribute = "{to_attribute}[{index}]".format(
+                to_attribute=to_attribute,
+                index=get_next_available_index_in_array(to_attribute)
+            )
+
+        return cmds.connectAttr(from_attribute, to_attribute, force=True)
+    except Exception as e:
+        LOG.error(traceback.format_exc())
+        return False
+
+def connect_attr(from_attr, to_attr):
+    if not cmds.isConnected(from_attr, to_attr):
+        cmds.connectAttr(from_attr, to_attr)
+
+def get_attr(attr_name, as_value=True):
+    """
+    Get the specified attribute
+    :param attr_name :type str: attribute name i.e node.translate
+    :param as_value :type bool: return as value or connected plug name
+    :return :type list or any: either returns a list of connections or the value of the attribute
+    """
+    # Check if the attribute is connected
+    connections = cmds.listConnections(attr_name, plugs=True)
+    if connections and not as_value:
+        # If the attribute is connected and we don't want the value, return the connections
+        return connections
+    elif as_value:
+        # Return the value
+        return cmds.getAttr(attr_name)
+
+def get_attr_array(attr_name, as_value=True):
+    """
+    Get the specified array attr
+    :param attr_name :type str: attribute name i.e node.translate
+    :param as_value :type bool: return as value or connected plug name
+    :return :type list or any: either returns a list of connections or the value of the attribute
+    """
+    # Get the number of indices in the array
+    indices = cmds.getAttr(attr_name, multiIndices=True) or []
+    # Empty list to store the connected plugs
+    connected_plugs = []
+    # Empty list to store values
+    values = []
+    # Iterate through the indices
+    for i in indices:
+        # Get all the connected plugs for this index
+        connections = cmds.listConnections('{attr_name}[{index}]'.format(attr_name=attr_name, index=i), plugs=True)
+        # If we want the plugs and not values, store connections
+        if connections and not as_value:
+            connected_plugs.extend(connections)
+        # If we want values, get the value at the index
+        elif as_value:
+            values.append(cmds.getAttr('{attr_name}[{index}]'.format(attr_name=attr_name, index=i)))
+    # Return plugs or values, depending on which one has data
+    return connected_plugs or values
+
+def set_attr_or_connect(source_attr_name, value=None, attr_type=None, output=False):
+    """
+    Set an attribute or connect it to another attribute
+    :param source_attr_name :type str: attribute name
+    :param value : type any: value to set the attribute to
+    :param attr_type :type str: name of the attribute type i.e matrix
+    :param output :type bool: is this plug an output (True) or input (False)
+    """
+    # Type conversion from maya: python
+    attr_types = {
+        'matrix': list
+    }
+    # Check if we have a matching type
+    matching_type = attr_types.get(attr_type, None)
+    # If we have a matching type and the value matches that type, set the attr
+    if matching_type is not None and isinstance(value, matching_type):
+        cmds.setAttr(source_attr_name, value, type=attr_type)
+    # If the value is a string and no type is matched, we want to connect the attributes
+    elif isinstance(value, str):
+        try:
+            # Connect from left->right depending on if the source is output or input
+            if output:
+                if not cmds.isConnected(source_attr_name, value):
+                    cmds.connectAttr(source_attr_name, value)
+            else:
+                if not cmds.isConnected(value, source_attr_name):
+                    cmds.connectAttr(value, source_attr_name)
+        except Exception as e:
+            raise exceptions.PoseWranglerAttributeError(
+                "Unable to {direction} {input} to '{output}'".format(
+                    direction="connect" if value else "disconnect",
+                    input=source_attr_name if output else value,
+                    output=value if output else source_attr_name
+                )
+            )
+    else:
+        cmds.setAttr(source_attr_name, value)
+
+def disconnect_attr(attr_name, array=False):
+    """
+    Disconnect the specified attribute
+    :param attr_name :type str: attribute name to disconnect
+    :param array :type bool: is this attribute an array?
+    """
+    attrs = []
+    # If we are disconnecting an array, get the names of all the attributes
+    if array:
+        attrs.extend(cmds.getAttr(attr_name, multiIndices=True) or [])
+    # Otherwise append the attr name specified
+    else:
+        attrs.append(attr_name)
+    # Iterate through all the attrs listed
+    for attr in attrs:
+        # Find their connections and disconnect them
+        for plug in cmds.listConnections(attr, plugs=True) or []:
+            cmds.disconnectAttr(attr, plug)
+
+def get_selection(_type=""):
+    """
+    Returns the current selection
+    """
+    return cmds.ls(selection=True, type=_type)
+
+def set_selection(selection_list):
+    """
+    Sets the active selection
+    """
+    cmds.select(selection_list, replace=True)

Scripts/Animation/epic_pose_wrangler/v2/view/maya_style.qss

@@ -0,0 +1,16 @@
+QListWidget[Log=true]{
+    background-color: #2A2A2A;
+    background-image: url("PoseWrangler:epic.png");
+    background-repeat: no-repeat;
+    background-position: bottom right;
+}
+
+QPushButton[Category=true] {
+    text-align: left;
+    background-color: #707070;
+}
+
+QPushButton::hover[Category=true] {
+    text-align: left;
+    background-color: #707070;
+}

Scripts/Animation/epic_pose_wrangler/v2/view/pose_wrangler_ui.ui

@@ -0,0 +1,839 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>883</width>
+    <height>693</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QHBoxLayout" name="horizontalLayout_4">
+    <item>
+     <widget class="QSplitter" name="splitter_3">
+      <property name="orientation">
+       <enum>Qt::Horizontal</enum>
+      </property>
+      <widget class="QSplitter" name="splitter_2">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <widget class="QWidget" name="verticalLayoutWidget">
+        <layout class="QVBoxLayout" name="verticalLayout">
+         <property name="spacing">
+          <number>0</number>
+         </property>
+         <item>
+          <widget class="QLabel" name="label">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="font">
+            <font>
+             <pointsize>10</pointsize>
+             <weight>75</weight>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>RBF SOLVERS:</string>
+           </property>
+           <property name="heading" stdset="0">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QListWidget" name="solver_LIST">
+           <property name="maximumSize">
+            <size>
+             <width>16777215</width>
+             <height>16777215</height>
+            </size>
+           </property>
+           <property name="selectionMode">
+            <enum>QAbstractItemView::ExtendedSelection</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="label_6">
+           <property name="text">
+            <string>RMB Solver for options</string>
+           </property>
+           <property name="alignment">
+            <set>Qt::AlignCenter</set>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_14">
+           <property name="spacing">
+            <number>2</number>
+           </property>
+           <item>
+            <widget class="QPushButton" name="toggle_edit_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Edit Selected Solver</string>
+             </property>
+             <property name="checkable">
+              <bool>true</bool>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+         <item>
+          <spacer name="verticalSpacer_6">
+           <property name="orientation">
+            <enum>Qt::Vertical</enum>
+           </property>
+           <property name="sizeType">
+            <enum>QSizePolicy::Fixed</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>20</width>
+             <height>2</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_13">
+           <property name="spacing">
+            <number>2</number>
+           </property>
+           <item>
+            <widget class="QPushButton" name="create_solver_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+               <weight>50</weight>
+               <bold>false</bold>
+              </font>
+             </property>
+             <property name="text">
+              <string>Create Solver</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="refresh_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+               <weight>50</weight>
+               <bold>false</bold>
+              </font>
+             </property>
+             <property name="text">
+              <string>Refresh Solvers</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+         <item>
+          <spacer name="verticalSpacer_2">
+           <property name="orientation">
+            <enum>Qt::Vertical</enum>
+           </property>
+           <property name="sizeType">
+            <enum>QSizePolicy::Fixed</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>20</width>
+             <height>2</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_11">
+           <property name="spacing">
+            <number>2</number>
+           </property>
+           <property name="topMargin">
+            <number>0</number>
+           </property>
+           <item>
+            <widget class="QPushButton" name="delete_solver_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+               <weight>75</weight>
+               <bold>true</bold>
+              </font>
+             </property>
+             <property name="text">
+              <string>Delete Solvers</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="mirror_solver_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Mirror Solver</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+         <item>
+          <spacer name="verticalSpacer_3">
+           <property name="orientation">
+            <enum>Qt::Vertical</enum>
+           </property>
+           <property name="sizeType">
+            <enum>QSizePolicy::Fixed</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>20</width>
+             <height>2</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <widget class="Line" name="line_4">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </widget>
+       <widget class="QWidget" name="verticalLayoutWidget_2">
+        <layout class="QVBoxLayout" name="poses_layout">
+         <item>
+          <widget class="QLabel" name="label_2">
+           <property name="font">
+            <font>
+             <pointsize>10</pointsize>
+             <weight>75</weight>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>POSES:</string>
+           </property>
+           <property name="heading" stdset="0">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QListWidget" name="pose_LIST">
+           <property name="selectionMode">
+            <enum>QAbstractItemView::ExtendedSelection</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_8">
+           <property name="spacing">
+            <number>2</number>
+           </property>
+           <item>
+            <widget class="QPushButton" name="add_pose_BTN">
+             <property name="enabled">
+              <bool>true</bool>
+             </property>
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+               <weight>50</weight>
+               <bold>false</bold>
+              </font>
+             </property>
+             <property name="text">
+              <string>Add Pose</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="edit_pose_BTN">
+             <property name="enabled">
+              <bool>true</bool>
+             </property>
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+               <weight>50</weight>
+               <bold>false</bold>
+              </font>
+             </property>
+             <property name="text">
+              <string>Update Pose</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="delete_pose_BTN">
+             <property name="enabled">
+              <bool>true</bool>
+             </property>
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+               <weight>50</weight>
+               <bold>false</bold>
+              </font>
+             </property>
+             <property name="text">
+              <string>Delete Pose</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_10">
+           <property name="spacing">
+            <number>2</number>
+           </property>
+           <item>
+            <widget class="QPushButton" name="mute_pose_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Mute Pose</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="mirror_pose_BTN">
+             <property name="enabled">
+              <bool>true</bool>
+             </property>
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+               <weight>50</weight>
+               <bold>false</bold>
+              </font>
+             </property>
+             <property name="text">
+              <string>Mirror Pose</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="rename_pose_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Rename Pose</string>
+             </property>
+             <property name="checkable">
+              <bool>false</bool>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+        </layout>
+       </widget>
+      </widget>
+      <widget class="QSplitter" name="splitter">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <widget class="QWidget" name="layoutWidget">
+        <layout class="QVBoxLayout" name="driver_layout">
+         <property name="spacing">
+          <number>0</number>
+         </property>
+         <item>
+          <widget class="QLabel" name="label_4">
+           <property name="font">
+            <font>
+             <pointsize>10</pointsize>
+             <weight>75</weight>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>DRIVER TRANSFORMS:</string>
+           </property>
+           <property name="heading" stdset="0">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QListWidget" name="driver_transforms_LIST">
+           <property name="selectionMode">
+            <enum>QAbstractItemView::ExtendedSelection</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout">
+           <property name="spacing">
+            <number>2</number>
+           </property>
+           <item>
+            <widget class="QPushButton" name="add_driver_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Add Driver Transforms</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="remove_driver_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Remove Driver Transforms</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+        </layout>
+       </widget>
+       <widget class="QWidget" name="layoutWidget">
+        <layout class="QVBoxLayout" name="driven_layout">
+         <item>
+          <widget class="QLabel" name="label_5">
+           <property name="font">
+            <font>
+             <pointsize>10</pointsize>
+             <weight>75</weight>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>DRIVEN TRANSFORMS/BLENDSHAPES</string>
+           </property>
+           <property name="heading" stdset="0">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QListWidget" name="driven_transforms_LIST">
+           <property name="selectionMode">
+            <enum>QAbstractItemView::ExtendedSelection</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_3">
+           <property name="spacing">
+            <number>2</number>
+           </property>
+           <property name="topMargin">
+            <number>0</number>
+           </property>
+           <item>
+            <widget class="QPushButton" name="add_driven_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Add Driven Transforms</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="remove_driven_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Remove Selected</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_2">
+           <item>
+            <widget class="QPushButton" name="create_blendshape_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Create Blendshape</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_6">
+           <item>
+            <widget class="QPushButton" name="add_existing_blendshape_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Add Existing Blendshape</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QPushButton" name="edit_blendshape_BTN">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
+             <property name="text">
+              <string>Edit Blendshape</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+        </layout>
+       </widget>
+      </widget>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QDockWidget" name="utilities_DOCK">
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <property name="minimumSize">
+    <size>
+     <width>306</width>
+     <height>99</height>
+    </size>
+   </property>
+   <property name="allowedAreas">
+    <set>Qt::LeftDockWidgetArea|Qt::RightDockWidgetArea</set>
+   </property>
+   <property name="windowTitle">
+    <string>Utilities</string>
+   </property>
+   <attribute name="dockWidgetArea">
+    <number>2</number>
+   </attribute>
+   <widget class="QWidget" name="dockWidgetContents">
+    <layout class="QVBoxLayout" name="verticalLayout_5">
+     <property name="spacing">
+      <number>2</number>
+     </property>
+     <property name="leftMargin">
+      <number>2</number>
+     </property>
+     <property name="topMargin">
+      <number>2</number>
+     </property>
+     <property name="rightMargin">
+      <number>2</number>
+     </property>
+     <property name="bottomMargin">
+      <number>2</number>
+     </property>
+     <item>
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QScrollArea" name="action_scroll_area">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="minimumSize">
+          <size>
+           <width>300</width>
+           <height>0</height>
+          </size>
+         </property>
+         <property name="horizontalScrollBarPolicy">
+          <enum>Qt::ScrollBarAlwaysOff</enum>
+         </property>
+         <property name="sizeAdjustPolicy">
+          <enum>QAbstractScrollArea::AdjustToContentsOnFirstShow</enum>
+         </property>
+         <property name="widgetResizable">
+          <bool>true</bool>
+         </property>
+         <widget class="QWidget" name="scrollAreaWidgetContents">
+          <property name="geometry">
+           <rect>
+            <x>0</x>
+            <y>0</y>
+            <width>298</width>
+            <height>642</height>
+           </rect>
+          </property>
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <layout class="QVBoxLayout" name="verticalLayout_3" stretch="0">
+           <property name="spacing">
+            <number>0</number>
+           </property>
+           <property name="leftMargin">
+            <number>0</number>
+           </property>
+           <property name="topMargin">
+            <number>0</number>
+           </property>
+           <property name="rightMargin">
+            <number>0</number>
+           </property>
+           <property name="bottomMargin">
+            <number>0</number>
+           </property>
+           <item>
+            <layout class="QVBoxLayout" name="verticalLayout_4">
+             <item>
+              <layout class="QVBoxLayout" name="extension_layout"/>
+             </item>
+             <item>
+              <widget class="QLabel" name="label_9">
+               <property name="font">
+                <font>
+                 <pointsize>10</pointsize>
+                 <weight>75</weight>
+                 <bold>true</bold>
+                </font>
+               </property>
+               <property name="text">
+                <string>Settings:</string>
+               </property>
+               <property name="heading" stdset="0">
+                <bool>true</bool>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QLabel" name="label_8">
+               <property name="text">
+                <string>Mirror Mapping:</string>
+               </property>
+               <property name="heading" stdset="0">
+                <bool>false</bool>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <layout class="QHBoxLayout" name="horizontalLayout_7">
+               <property name="spacing">
+                <number>2</number>
+               </property>
+               <item>
+                <widget class="QLineEdit" name="mirror_mapping_LINE">
+                 <property name="readOnly">
+                  <bool>true</bool>
+                 </property>
+                 <property name="placeholderText">
+                  <string>Mirror Mapping File</string>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="QPushButton" name="mirror_mapping_BTN">
+                 <property name="font">
+                  <font>
+                   <pointsize>10</pointsize>
+                  </font>
+                 </property>
+                 <property name="text">
+                  <string>Select File</string>
+                 </property>
+                </widget>
+               </item>
+              </layout>
+             </item>
+             <item>
+              <spacer name="verticalSpacer">
+               <property name="orientation">
+                <enum>Qt::Vertical</enum>
+               </property>
+               <property name="sizeHint" stdset="0">
+                <size>
+                 <width>20</width>
+                 <height>585</height>
+                </size>
+               </property>
+              </spacer>
+             </item>
+             <item>
+              <spacer name="horizontalSpacer">
+               <property name="orientation">
+                <enum>Qt::Horizontal</enum>
+               </property>
+               <property name="sizeHint" stdset="0">
+                <size>
+                 <width>40</width>
+                 <height>1</height>
+                </size>
+               </property>
+              </spacer>
+             </item>
+            </layout>
+           </item>
+          </layout>
+         </widget>
+        </widget>
+       </item>
+      </layout>
+     </item>
+    </layout>
+   </widget>
+  </widget>
+  <widget class="QMenuBar" name="menuBar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>883</width>
+     <height>21</height>
+    </rect>
+   </property>
+   <widget class="QMenu" name="menuHelp">
+    <property name="title">
+     <string>Help</string>
+    </property>
+    <addaction name="documentation_ACT"/>
+   </widget>
+   <widget class="QMenu" name="menuFile">
+    <property name="title">
+     <string>File</string>
+    </property>
+    <addaction name="import_drivers_ACT"/>
+    <addaction name="separator"/>
+    <addaction name="export_drivers_ACT"/>
+    <addaction name="export_selected_drivers_ACT"/>
+   </widget>
+   <widget class="QMenu" name="menuEdit">
+    <property name="title">
+     <string>Edit</string>
+    </property>
+    <widget class="QMenu" name="menuStyle">
+     <property name="title">
+      <string>Style</string>
+     </property>
+     <addaction name="use_maya_style_ACT"/>
+    </widget>
+    <addaction name="menuStyle"/>
+   </widget>
+   <addaction name="menuFile"/>
+   <addaction name="menuEdit"/>
+   <addaction name="menuHelp"/>
+  </widget>
+  <action name="connectSkinNode_action">
+   <property name="text">
+    <string>Connect Selected Skin Nodes</string>
+   </property>
+  </action>
+  <action name="createGeometry_action">
+   <property name="text">
+    <string>Create Geometry From SkinNode</string>
+   </property>
+  </action>
+  <action name="unbindGeometry_action">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="checked">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Unbind Geometry When Saving</string>
+   </property>
+  </action>
+  <action name="documentation_ACT">
+   <property name="text">
+    <string>Documentation</string>
+   </property>
+  </action>
+  <action name="actionGithub">
+   <property name="text">
+    <string>Github</string>
+   </property>
+  </action>
+  <action name="import_drivers_ACT">
+   <property name="text">
+    <string>Import Drivers</string>
+   </property>
+  </action>
+  <action name="export_drivers_ACT">
+   <property name="text">
+    <string>Export All Drivers</string>
+   </property>
+  </action>
+  <action name="export_selected_drivers_ACT">
+   <property name="text">
+    <string>Export Selected Drivers</string>
+   </property>
+  </action>
+  <action name="use_maya_style_ACT">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Use Maya Style</string>
+   </property>
+  </action>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

Scripts/Animation/epic_pose_wrangler/v2/view/pose_wrangler_window.py

@@ -0,0 +1,980 @@
+# Copyright Epic Games, Inc. All Rights Reserved.
+
+import os
+import webbrowser
+from functools import partial
+
+from maya.app.general.mayaMixin import MayaQWidgetDockableMixin
+
+from Qt import QtWidgets, QtGui
+from Qt import QtCore
+# from Qt import QtUiTools
+from Qt.QtCompat import loadUi
+
+from epic_pose_wrangler.v2.view import ui_context
+from epic_pose_wrangler.v2.view.widget import category
+from epic_pose_wrangler.log import LOG
+from epic_pose_wrangler.view import log_widget
+from epic_pose_wrangler.model import settings
+
+class PoseWranglerWindow(MayaQWidgetDockableMixin, QtWidgets.QMainWindow):
+    """
+    class for the pose wranglerUI
+    """
+
+    # Solver Signals
+    event_create_solver = QtCore.Signal(str)
+    event_delete_solver = QtCore.Signal(str)
+    event_edit_solver = QtCore.Signal(bool, object)
+    event_mirror_solver = QtCore.Signal(object)
+    event_refresh_solvers = QtCore.Signal()
+    event_set_current_solver = QtCore.Signal(object)
+    # Driver Signals
+    event_add_drivers = QtCore.Signal()
+    event_remove_drivers = QtCore.Signal(list)
+    event_import_drivers = QtCore.Signal(str)
+    event_export_drivers = QtCore.Signal(str, list)
+    # Driven Signals
+    event_add_driven = QtCore.Signal(list, object, bool)
+    event_remove_driven = QtCore.Signal(list, object)
+    # Pose Signals
+    event_add_pose = QtCore.Signal(str, object)
+    event_delete_pose = QtCore.Signal(str, object)
+    event_go_to_pose = QtCore.Signal(str, object)
+    event_mirror_pose = QtCore.Signal(str, object)
+    event_rename_pose = QtCore.Signal(str, str, object)
+    event_update_pose = QtCore.Signal(str, object)
+    event_mute_pose = QtCore.Signal(str, object, object)
+    # Blendshape Signals
+    event_create_blendshape = QtCore.Signal(str, str, bool, object)
+    event_add_blendshape = QtCore.Signal(str, str, str, object)
+    event_edit_blendshape = QtCore.Signal(str, bool, object)
+    # Utility Signals
+    event_get_valid_actions = QtCore.Signal(object)
+    event_select = QtCore.Signal(list)
+    event_set_mirror_mapping = QtCore.Signal(str)
+
+    def __init__(self):
+        super(PoseWranglerWindow, self).__init__()
+        # Load the UI file
+        file_path = os.path.dirname(__file__) + "/pose_wrangler_ui.ui"
+        if os.path.exists(file_path):
+            ui_file = QtCore.QFile(file_path)
+            # Attempt to open and load the UI
+            try:
+                # ui_file.open(QtCore.QFile.ReadOnly)
+                # loader = QtUiTools.QUiLoader()
+                # self.win = loader.load(ui_file)
+                self.win = loadUi(file_path)
+            finally:
+                # Always close the UI file regardless of loader result
+                # ui_file.close()
+                pass
+        else:
+            raise ValueError('UI File does not exist on disk at path: {}'.format(file_path))
+        icon_folder = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), 'resources', 'icons')
+        QtCore.QDir.setSearchPaths("PoseWrangler", [icon_folder])
+        self.setWindowTitle("Pose Wrangler 2.0.0")
+
+        # Embed the UI window inside this window
+        self.setCentralWidget(self.win)
+        self.setWindowIcon(QtGui.QIcon(QtGui.QPixmap("PoseWrangler:unreal.png")))
+
+        # Solver Connections
+        self.win.create_solver_BTN.pressed.connect(self._create_solver)
+        self.win.delete_solver_BTN.pressed.connect(self._delete_solver)
+        self.win.toggle_edit_BTN.clicked.connect(self._edit_solver_toggle)
+        self.win.mirror_solver_BTN.pressed.connect(self._mirror_solver)
+        self.win.refresh_BTN.clicked.connect(self._refresh_solvers)
+        self.win.solver_LIST.itemSelectionChanged.connect(self._solver_selection_changed)
+        self.win.solver_LIST.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
+        self.win.solver_LIST.customContextMenuRequested.connect(self._solver_context_menu_requested)
+
+        # Driver Connections
+        self.win.add_driver_BTN.pressed.connect(self._add_drivers)
+        self.win.remove_driver_BTN.pressed.connect(self._remove_drivers)
+        self.win.import_drivers_ACT.triggered.connect(self._import_drivers)
+        self.win.export_drivers_ACT.triggered.connect(partial(self._export_drivers, True))
+        self.win.export_selected_drivers_ACT.triggered.connect(self._export_drivers)
+        self.win.driver_transforms_LIST.itemDoubleClicked.connect(
+            partial(
+                self._select_in_scene,
+                self.win.driver_transforms_LIST
+            )
+        )
+        self.win.driven_transforms_LIST.itemDoubleClicked.connect(
+            partial(
+                self._select_in_scene,
+                self.win.driven_transforms_LIST
+            )
+        )
+
+        # Driven Connections
+        self.win.add_driven_BTN.pressed.connect(self._add_driven)
+        self.win.remove_driven_BTN.pressed.connect(self._remove_driven)
+
+        # Pose Connections
+        self.win.add_pose_BTN.pressed.connect(self._create_pose)
+        self.win.delete_pose_BTN.pressed.connect(self._delete_pose)
+        self.win.edit_pose_BTN.pressed.connect(self._update_pose)
+        self.win.mirror_pose_BTN.pressed.connect(self._mirror_pose)
+        self.win.rename_pose_BTN.pressed.connect(self._rename_pose)
+        self.win.mute_pose_BTN.pressed.connect(self._mute_pose)
+        self.win.pose_LIST.itemSelectionChanged.connect(self._pose_selection_changed)
+
+        # Blendshape Connections
+        self.win.create_blendshape_BTN.pressed.connect(self._create_blendshape)
+        self.win.add_existing_blendshape_BTN.pressed.connect(self._add_blendshape)
+        self.win.edit_blendshape_BTN.pressed.connect(self._edit_blendshape)
+
+        # Utility Connections
+        self.win.mirror_mapping_BTN.clicked.connect(self.set_mirror_file)
+        self.win.use_maya_style_ACT.triggered.connect(self._toggle_stylesheet)
+        self.win.documentation_ACT.triggered.connect(self._open_documentation)
+
+        self.win.use_maya_style_ACT.setChecked(bool(int(settings.SettingsManager.get_setting("UseMayaStyle") or 0)))
+
+        # Create a log dock widget
+        self._log_widget = log_widget.LogWidget()
+        # Add the log widget as a handler for the current log to display log messages in the UI
+        LOG.addHandler(self._log_widget)
+        # Add the dock to the window
+        self.addDockWidget(QtCore.Qt.BottomDockWidgetArea, self._log_widget.log_dock)
+
+        # Set the stylesheet
+        self._set_stylesheet()
+        # Empty vars to store the currently edited solver and blendshape, None if not editing either
+        self._editing_solver = None
+        self._editing_blendshape = None
+        self._valid_actions = []
+
+        # Generate lists of UI elements for different UI states.
+        # Solver context enables/disables the specified widgets when a solver is in edit mode or not
+        self._solver_context_ui_elements = [self.win.add_pose_BTN, self.win.delete_pose_BTN,
+                                            self.win.edit_pose_BTN, self.win.mirror_pose_BTN, self.win.mute_pose_BTN,
+                                            self.win.add_driven_BTN, self.win.remove_driven_BTN,
+                                            self.win.create_blendshape_BTN,
+                                            self.win.add_existing_blendshape_BTN, self.win.edit_blendshape_BTN,
+                                            self.win.add_driver_BTN, self.win.remove_driver_BTN,
+                                            self.win.rename_pose_BTN]
+        # Blendshape editing context enables/disables the specified widgets when a blendshape is being edited or not
+        self._blendshape_editing_context_ui_elements = [self.win.add_pose_BTN, self.win.delete_pose_BTN,
+                                                        self.win.edit_pose_BTN, self.win.mirror_pose_BTN,
+                                                        self.win.mute_pose_BTN,
+                                                        self.win.add_driven_BTN, self.win.remove_driven_BTN,
+                                                        self.win.create_blendshape_BTN,
+                                                        self.win.add_existing_blendshape_BTN,
+                                                        self.win.add_driver_BTN, self.win.remove_driver_BTN,
+                                                        self.win.create_solver_BTN, self.win.delete_solver_BTN,
+                                                        self.win.toggle_edit_BTN, self.win.rename_pose_BTN]
+
+        # Disable all the solver elements by default
+        for element in self._solver_context_ui_elements:
+            element.setEnabled(False)
+
+        self.show(dockable=True)
+
+    @property
+    def valid_actions(self):
+        return self._valid_actions
+
+    def add_rbf_solver(self, solver, edit=False):
+        """
+        Add a solver to the view
+        :param solver :type api.RBFNode: solver reference
+        :param edit :type bool: is this solver in edit mode?
+        """
+        # Create a new widget item with the solver name
+        item = QtWidgets.QListWidgetItem(str(solver))
+        # Add the solver and the edit status as custom data on the item
+        item.setData(QtCore.Qt.UserRole, {"solver": solver, "edit": edit})
+        # If we are editing, keep track of it
+        if edit:
+            self._editing_solver = solver
+        # Add the item to the solver list
+        self.win.solver_LIST.addItem(item)
+
+    def clear(self):
+        """
+        Clear all the lists in the UI
+        """
+        self.win.solver_LIST.clear()
+        self.win.driver_transforms_LIST.clear()
+        self.win.driven_transforms_LIST.clear()
+        self.win.pose_LIST.clear()
+
+    def delete_solver(self, solver):
+        """
+        Delete the specified solver from the view
+        :param solver :type api.RBFNode: solver ref
+        """
+        # Iterate through the solvers
+        for i in range(self.win.solver_LIST.count()):
+            # Get the item
+            item = self.win.solver_LIST.item(i)
+            # If the solver matches the solver from the item data
+            if item.data(QtCore.Qt.UserRole)['solver'] == solver:
+                # Remove the item from the list and break early
+                self.win.solver_LIST.takeItem(self.win.solver_LIST.row(item))
+                break
+
+    def display_extensions(self, extensions):
+        """
+        Adds any found extensions to the utilities dock
+        :param extensions :type list: list of PoseWranglerExtension instances
+        """
+        # Clear the existing extension layout
+        for i in reversed(range(0, self.win.extension_layout.count())):
+            item = self.win.extension_layout.itemAt(i)
+            if isinstance(item, QtWidgets.QWidgetItem):
+                widget = item.widget()
+                widget.deleteLater()
+                del widget
+            self.win.extension_layout.removeItem(item)
+
+        categories = {}
+        for extension in extensions:
+            if extension.view:
+                category_name = extension.__category__ or "Default"
+                if category_name in categories:
+                    category_widget = categories[category_name]
+                else:
+                    category_widget = category.CategoryWidget(category_name)
+                    categories[category_name] = category_widget
+                    self.win.extension_layout.addWidget(category_widget)
+                category_widget.add_extension(extension.view)
+
+        self.win.utilities_DOCK.setMinimumWidth(
+            self.win.extension_layout.sizeHint().width() +
+            self.win.action_scroll_area.verticalScrollBar().sizeHint().width()
+        )
+
+    def edit_blendshape(self, pose_name, edit=False):
+        """
+        Set the UI in blendshape edit mode or finish editing.
+        :param pose_name :type str: name of the pose to edit or finish editing
+        :param edit :type bool: True = edit mode, False = finish editing
+        """
+        # Iterate through all of the driven transforms in the list
+        for i in range(self.win.driven_transforms_LIST.count()):
+            # Get the item
+            item = self.win.driven_transforms_LIST.item(i)
+            # Find the custom data stored on the item
+            item_data = item.data(QtCore.Qt.UserRole)
+            # If the item type is a blendshape and the pose matches the current pose, break
+            if item_data['type'] == 'blendshape' and item_data['pose_name'] == pose_name:
+                break
+        # If no break was hit, exit early because no match was found
+        else:
+            return
+        # If we are editing
+        if edit:
+            # If we are already editing a blendshape, finish editing the previous one first
+            if self._editing_blendshape is not None:
+                # Get the existing item data from the currently edited blendshape
+                existing_item_data = self._editing_blendshape.data(QtCore.Qt.UserRole)
+                # Finish editing
+                self.event_edit_blendshape.emit(
+                    existing_item_data['pose_name'], False,
+                    existing_item_data['solver']
+                )
+                # Update the icon
+                self._editing_blendshape.setIcon(QtGui.QIcon(":/blendShape.png"))
+            # Store a ref to the new blendshape being edited
+            self._editing_blendshape = item
+            # Update the button text
+            self.win.edit_blendshape_BTN.setText("Finish Editing Blendshape")
+            # Update the icon to show edit mode
+            item.setIcon(QtGui.QIcon(":/fileTextureEdit.png"))
+            # Disable all the non blendshape related ui elements
+            for element in self._blendshape_editing_context_ui_elements:
+                element.setEnabled(False)
+        # If we are not editing
+        else:
+            # Clear the ref to the edited blendshape
+            self._editing_blendshape = None
+            # Revert the button text
+            self.win.edit_blendshape_BTN.setText("Edit Blendshape")
+            # Revert the icon
+            item.setIcon(QtGui.QIcon(":/blendShape.png"))
+            # Re-enable all the ui elements
+            for element in self._blendshape_editing_context_ui_elements:
+                element.setEnabled(True)
+        # Store the edit status in the item data
+        item_data['edit'] = edit
+        # Update the item data on the widget
+        item.setData(QtCore.Qt.UserRole, item_data)
+
+    def edit_solver(self, solver, edit=False):
+        """
+        Set the UI in solver edit mode or finish editing.
+        :param solver :type str: name of the solver to edit or finish editing
+        :param edit :type bool: True = edit mode, False = finish editing
+        """
+        # Iterate through the solvers
+        for i in range(self.win.solver_LIST.count()):
+            # Get the widget item
+            item = self.win.solver_LIST.item(i)
+            # If the solver matches the item data, break
+            if item.data(QtCore.Qt.UserRole)['solver'] == solver:
+                break
+        # No match found, return early
+        else:
+            return
+        # Grab the item data for the item
+        item_data = item.data(QtCore.Qt.UserRole)
+
+        # If edit mode
+        if edit:
+            # If we are already editing a solver, finish editing that one first
+            if self._editing_solver is not None:
+                # Update the icon
+                self._editing_solver.setIcon(QtGui.QIcon())
+                # Finish editing
+                self.event_edit_solver.emit(False, self._editing_solver)
+            # Store the new item as the current edited solver
+            self._editing_solver = item
+            # Update the button text
+            self.win.toggle_edit_BTN.setText("Finish Editing '{solver}'".format(solver=solver))
+            # Set the edit icon
+            item.setIcon(QtGui.QIcon(":/fileTextureEdit.png"))
+        else:
+            # Clear the current solver
+            self._editing_solver = None
+            # Revert the button text
+            self.win.toggle_edit_BTN.setText("Edit Selected Driver")
+            # Clear the edit icon
+            item.setIcon(QtGui.QIcon())
+
+        # Update the item data with the new edit status
+        item_data['edit'] = edit
+        # Set the item data
+        item.setData(QtCore.Qt.UserRole, item_data)
+
+        # Update the solver related ui elements with the current edit status
+        for element in self._solver_context_ui_elements:
+            element.setEnabled(edit)
+
+        self.win.delete_solver_BTN.setEnabled(not edit)
+        self.win.create_solver_BTN.setEnabled(not edit)
+        self.win.refresh_BTN.setEnabled(not edit)
+        self.win.mirror_solver_BTN.setEnabled(not edit)
+        # If a pose is selected, go to it. This will cause transforms to pop if edits weren't saved
+        self._pose_selection_changed()
+
+    def get_context(self):
+        """
+        Gets the current state of the ui
+        :return: PoseWranglerUIContext
+        """
+        return ui_context.PoseWranglerUIContext(
+            current_solvers=[i.text() for i in self.win.solver_LIST.selectedItems()],
+            current_poses=[i.text() for i in self.win.pose_LIST.selectedItems()],
+            current_drivers=[i.text() for i in self.win.driver_transforms_LIST.selectedItems()],
+            current_driven=[i.text() for i in self.win.driven_transforms_LIST.selectedItems()],
+            solvers=[self.win.solver_LIST.item(i).text() for i in range(0, self.win.solver_LIST.count())],
+            poses=[self.win.pose_LIST.item(i).text() for i in range(0, self.win.pose_LIST.count())],
+            drivers=[self.win.driver_transforms_LIST.item(i).text() for i in
+                     range(0, self.win.driver_transforms_LIST.count())],
+            driven=[self.win.driven_transforms_LIST.item(i).text() for i in
+                    range(0, self.win.driven_transforms_LIST.count())],
+        )
+
+    def load_solver_settings(self, solver, drivers, driven_transforms, poses):
+        """
+        Display the settings for the specified solver
+        :param solver :type RBFNode: solver reference
+        :param drivers :type dict: dictionary of driver name: driver data
+        :param driven_transforms :type dict: dictionary of driven transform type: driven transforms
+        :param poses :type dict: dictionary of pose data
+        """
+        # Grab the current selection from the driver, driven and pose list
+        current_drivers = [i.text() for i in self.win.driver_transforms_LIST.selectedItems()]
+        current_driven = [i.text() for i in self.win.driven_transforms_LIST.selectedItems()]
+        current_poses = [i.text() for i in self.win.pose_LIST.selectedItems()]
+
+        # Clear the driver, driven and pose lists
+        self.win.driver_transforms_LIST.clear()
+        self.win.driven_transforms_LIST.clear()
+        self.win.pose_LIST.clear()
+
+        # Iterate through each driver
+        for driver_name, driver_data in drivers.items():
+            # Create new item widget
+            item = QtWidgets.QListWidgetItem(driver_name)
+            # Set the icon to a joint
+            item.setIcon(QtGui.QIcon(":/kinJoint.png"))
+            # Add item to the list
+            self.win.driver_transforms_LIST.addItem(item)
+            # Set the item data so it can be referenced later
+            item.setData(QtCore.Qt.UserRole, driver_data)
+
+        # Iterate through the driven transforms transform nodes
+        for driven_transform in driven_transforms['transform']:
+            # Create new item widget
+            item = QtWidgets.QListWidgetItem(driven_transform)
+            # Store the solver and item type
+            item.setData(QtCore.Qt.UserRole, {'type': 'transform', 'solver': solver})
+            # Set the icon to a joint
+            item.setIcon(QtGui.QIcon(":/kinJoint.png"))
+            # Add item to the list
+            self.win.driven_transforms_LIST.addItem(item)
+
+        # Iterate through all the driven transforms blendshapes
+        for blendshape_mesh, pose_name in driven_transforms['blendshape'].items():
+            # Create new item widget
+            item = QtWidgets.QListWidgetItem(blendshape_mesh)
+            # Store the solver, pose associated with the blendshape and the item type
+            item.setData(QtCore.Qt.UserRole, {'type': 'blendshape', 'pose_name': pose_name, 'solver': solver})
+            # Set the icon to blendshape
+            item.setIcon(QtGui.QIcon(":/blendShape.png"))
+            # Add item to the list
+            self.win.driven_transforms_LIST.addItem(item)
+
+        # Iterate through the poses
+        for pose, pose_data in poses.items():
+            # Create item and add it to the list
+            item = QtWidgets.QListWidgetItem(pose)
+            self.win.pose_LIST.addItem(item)
+            muted = not pose_data.get('target_enable', True)
+            if muted:
+                font = item.font()
+                font.setStrikeOut(True)
+                item.setFont(font)
+            # Set icon to a pose
+            item.setIcon(QtGui.QIcon(":/p-head.png"))
+
+        # Iterate through the solvers
+        for row in range(self.win.solver_LIST.count()):
+            # Find the item
+            item = self.win.solver_LIST.item(row)
+            # If the current solver matches this item, select it
+            if solver == item.data(QtCore.Qt.UserRole)['solver']:
+                item.setSelected(True)
+                break
+
+        # Create a map between widgets: names of previously selected items
+        existing_selection_to_list_map = {
+            self.win.driver_transforms_LIST: current_drivers,
+            self.win.driven_transforms_LIST: current_driven,
+            self.win.pose_LIST: current_poses
+        }
+        # Iterate through the widgets: target selections
+        for list_ref, current in existing_selection_to_list_map.items():
+            # Block signals so we don't fire any selection changed events
+            list_ref.blockSignals(True)
+            # Iterate through the list widget
+            for i in range(list_ref.count()):
+                # Get the item
+                item = list_ref.item(i)
+                # Check if the text is in the list of currently selected items (case sensitive) and select/deselect
+                # as appropriate
+                if item.text() in current:
+                    item.setSelected(True)
+                else:
+                    item.setSelected(False)
+            # Unblock the signals
+            list_ref.blockSignals(False)
+
+    def set_mirror_file(self):
+        """
+        Open up a dialog to get a new mirror mapping file
+        """
+        # Open dialog
+        result = QtWidgets.QFileDialog.getOpenFileName(
+            self, "Mirror Mapping File",
+            os.path.join(os.path.dirname(__file__), 'mirror_mappings'),
+            "Mirror Mapping File (*.json)"
+        )
+        # If no file specified, exit early
+        if not result[0]:
+            return
+        # Emit the event
+        self.event_set_mirror_mapping.emit(result[0])
+
+    def update_mirror_mapping_file(self, path):
+        """
+        Update the mirror mapping widget with the specified path
+        :param path :type str: file path to the mirror mapping file
+        """
+        # Set the text
+        self.win.mirror_mapping_LINE.setText(path)
+
+    # ================================================ Solvers ======================================================= #
+
+    def _create_solver(self):
+        """
+        Create a new solver with the given name
+        """
+        # Popup input widget to get the solver name
+        interp_name, ok = QtWidgets.QInputDialog.getText(self, 'Create Solver', 'Solver Name:')
+        # Hack to fix broken styling caused by using a QInputDialog
+        self.win.create_solver_BTN.setEnabled(False)
+        self.win.create_solver_BTN.setEnabled(True)
+        # If no name, exit
+        if not interp_name:
+            return
+
+        if not interp_name.lower().endswith('_uerbfsolver'):
+            interp_name += "_UERBFSolver"
+        # Trigger solver creation
+        self.event_create_solver.emit(interp_name)
+
+    def _delete_solver(self):
+        """
+        Delete selected solvers
+        """
+        # Get the current solver selection
+        selected_items = self.win.solver_LIST.selectedItems()
+
+        selected_solvers = []
+        # Iterate through the selection in reverse
+        for item in reversed(selected_items):
+            # Grab the solver from the item data
+            selected_solvers.append(item.data(QtCore.Qt.UserRole)['solver'])
+
+        # Delete the solvers from the backend first
+        for solver in selected_solvers:
+            self.event_delete_solver.emit(solver)
+
+    def _edit_solver_toggle(self):
+        """
+        Toggle edit mode for the currently selected driver
+        """
+        # Grab the current selection
+        selection = self.win.solver_LIST.selectedItems()
+        if selection:
+            # Grab the last item
+            item = selection[-1]
+            # Get the item data
+            item_data = item.data(QtCore.Qt.UserRole)
+            # Get the solver
+            solver = item_data['solver']
+            # Trigger edit mode enabled/disabled depending on the solvers current edit state
+            self.event_edit_solver.emit(not item_data.get('edit', False), solver)
+
+    def _get_item_from_solver(self, solver):
+        """
+        Get the widget associated with this solver
+        :param solver :type api.RBFNode: solver ref
+        :return :type QtWidgets.QListWidgetItem or None: widget
+        """
+        # Iterate through the solver list
+        for i in range(self.win.solver_LIST.count()):
+            # Get the item
+            item = self.win.solver_LIST.item(i)
+            # If the solver stored in the item data matches, return it
+            if item.data(QtCore.Qt.UserRole)['solver'] == solver:
+                return item
+        # No match found, returning None
+
+    def _get_selected_solvers(self):
+        """
+        :return: List of current RBFNodes
+        """
+        # Get the solver from the item data for each item in the current selection
+        return [item.data(QtCore.Qt.UserRole)['solver'] for item in self.win.solver_LIST.selectedItems()]
+
+    def _mirror_solver(self):
+        """
+        Mirror the selected solvers
+        """
+        # For each solver, trigger mirroring
+        for solver in self._get_selected_solvers():
+            self.event_mirror_solver.emit(solver)
+
+    def _refresh_solvers(self):
+        """
+        Refresh the solver list
+        """
+        self.event_refresh_solvers.emit()
+
+    def _solver_selection_changed(self):
+        """
+        When the solver selection changes, update the driver/driven and poses list accordingly
+        """
+        # Get the current selection
+        items = self.win.solver_LIST.selectedItems()
+        # If we have a selection
+        if items:
+            # Grab the last selected item
+            item = items[-1]
+            # Grab the item data
+            item_data = item.data(QtCore.Qt.UserRole)
+            # Set the current solver to the solver associated with this widget
+            self.event_set_current_solver.emit(item_data['solver'])
+            # Get the solvers edit status
+            edit = item_data.get('edit', False)
+            # Enable/disable the ui elements accordingly
+            for element in self._solver_context_ui_elements:
+                element.setEnabled(edit)
+            # If we are in edit mode
+            if edit:
+                # Update the button
+                self.win.toggle_edit_BTN.setText("Finish Editing '{solver}'".format(solver=item_data['solver']))
+                # Set the icon
+                item.setIcon(QtGui.QIcon(":/fileTextureEdit.png"))
+        # No selection, clear all the lists
+        else:
+            self.win.driver_transforms_LIST.clear()
+            self.win.driven_transforms_LIST.clear()
+            self.win.pose_LIST.clear()
+
+    # ================================================ Drivers ======================================================= #
+
+    def _add_drivers(self):
+        """
+        Add drivers.
+        """
+        # Emit nothing so that the current scene selection will be used
+        self.event_add_drivers.emit()
+
+    def _remove_drivers(self):
+        """
+        Remove the specified drivers
+        """
+        # Emit the selected drivers to be deleted
+        self.event_remove_drivers.emit(
+            [i.data(QtCore.Qt.UserRole)
+             for i in self.win.driver_transforms_LIST.selectedItems()]
+        )
+
+    # ================================================ Driven ======================================================== #
+
+    def _add_driven(self):
+        """
+        Add driven nodes to the solver
+        """
+        # Emit no driven nodes so that it uses scene selection, no solver so that it uses the current solver and set
+        # edit mode to true
+        self.event_add_driven.emit(None, None, True)
+
+    def _remove_driven(self):
+        """
+        Remove driven transforms from the specified solver
+        """
+        # Get currently selected driven items
+        items = self.win.driven_transforms_LIST.selectedItems()
+        # Exit early if nothing is selected
+        if not items:
+            return
+        # Get the solver for the last item (they should all have the same solver)
+        solver = items[-1].data(QtCore.Qt.UserRole)['solver']
+        # Trigger event to remove specified nodes for the solver
+        self.event_remove_driven.emit([i.text() for i in items], solver)
+
+    # ============================================== Blendshapes ===================================================== #
+
+    def _add_blendshape(self):
+        """
+        Add an existing blendshape to the solver for the current pose
+        """
+        # Get current solver
+        solver = self._get_selected_solvers()
+        # Get current pose
+        poses = self._get_selected_poses()
+        if not solver or not poses:
+            LOG.warning("Unable to add blendshape, please select a solver and a pose and try again")
+            return
+        self.event_add_blendshape.emit(poses[-1], "", "", solver[-1])
+
+    def _create_blendshape(self):
+        """
+        Create a blendshape for the current solver at the current pose
+        """
+        # Get current solver
+        solver = self._get_selected_solvers()
+        # Get current pose
+        poses = self._get_selected_poses()
+        if not solver or not poses:
+            LOG.warning("Unable to create blendshape, please select a solver and a pose and try again")
+            return
+        # Create a blendshape for the last pose selected, with the current mesh selection, in edit mode enabled and
+        # for the last solver selected
+        self.event_create_blendshape.emit(poses[-1], None, True, solver[-1])
+
+    def _edit_blendshape(self):
+        """
+        Edit or finish editing the selected blendshape
+        """
+        # Get the current blendshape being edited
+        blendshape = self._editing_blendshape
+        # If none is being edited, see if we have a blendshape selected
+        if blendshape is None:
+            # Get all the blendshapes selected
+            selection = [sel for sel in self.win.driven_transforms_LIST.selectedItems() if
+                         sel.data(QtCore.Qt.UserRole)['type'] == 'blendshape']
+            # Update the blendshape var
+            if selection:
+                blendshape = selection[-1]
+        # If we have a blendshape
+        if blendshape:
+            # Get the item data
+            item_data = blendshape.data(QtCore.Qt.UserRole)
+            # Get the associated pose name and solver
+            pose_name = item_data['pose_name']
+            solver = item_data['solver']
+            # Trigger editing the blendshape for the pose name, using the opposite to the current edit status and for
+            # the associated solver
+            self.event_edit_blendshape.emit(pose_name, not item_data.get('edit', False), solver)
+
+    # ================================================= Poses ======================================================== #
+
+    def _create_pose(self):
+        """
+        Create a new pose
+        """
+        # Get the current solver
+        selected_solvers = self._get_selected_solvers()
+
+        # Get the last selection
+        solver = selected_solvers[-1]
+        # Display popup to get pose name
+        pose_name, ok = QtWidgets.QInputDialog.getText(self, 'Create Pose', 'Pose Name:')
+        # Hack to fix broken styling caused by using a QInputDialog
+        self.win.add_pose_BTN.setEnabled(False)
+        self.win.add_pose_BTN.setEnabled(True)
+
+        if pose_name:
+            # If a pose name is specified, create pose
+            self.event_add_pose.emit(pose_name, solver)
+
+    def _delete_pose(self):
+        """
+        Delete the selected poses
+        """
+        # Get the currently selected poses
+        poses = self._get_selected_poses()
+        # Exit early if nothing is selected
+        if not poses:
+            return
+        # Get the selected solver
+        solver = self._get_selected_solvers()[-1]
+        # Block the signals to stop UI event updates
+        self.win.pose_LIST.blockSignals(True)
+        # For each selected pose, delete it
+        for pose_name in poses:
+            self.event_delete_pose.emit(pose_name, solver)
+        self.win.pose_LIST.blockSignals(False)
+
+    def _get_selected_poses(self):
+        """
+        Get the selected poses
+        :return :type list: list of selected pose names
+        """
+        return [item.text() for item in self.win.pose_LIST.selectedItems()]
+
+    def _mirror_pose(self):
+        """
+        Mirror the selected poses
+        """
+        # Get the pose selection
+        poses = self._get_selected_poses()
+        # Exit early if nothing is selected
+        if not poses:
+            return
+        # Get the selected solver
+        solver = self._get_selected_solvers()[-1]
+        # For each pose, mirror it. This will create a mirrored solver if it doesn't already exist
+        for pose_name in poses:
+            self.event_mirror_pose.emit(pose_name, solver)
+
+    def _mute_pose(self):
+        """
+        Toggles the muted status for the poses the selected poses
+        """
+        # Get the pose selection
+        poses = self._get_selected_poses()
+        # Exit early if nothing is selected
+        if not poses:
+            return
+
+        solver = self._get_selected_solvers()[-1]
+        # For each pose, mirror it. This will create a mirrored solver if it doesn't already exist
+        for pose_name in poses:
+            self.event_mute_pose.emit(pose_name, None, solver)
+
+    def _pose_selection_changed(self):
+        """
+        On pose selection changed, go to the new pose
+        """
+        # Get the current pose selection
+        selected_poses = self._get_selected_poses()
+        if selected_poses:
+            # Get the last pose
+            selected_pose = selected_poses[-1]
+            # Get the selected solver
+            solver = self._get_selected_solvers()[-1]
+            # Go to pose
+            self.event_go_to_pose.emit(selected_pose, solver)
+
+    def _rename_pose(self):
+        """
+        Rename the currently selected pose
+        """
+        # Get the current pose selection
+        poses = self._get_selected_poses()
+        # Exit early if nothing is selected
+        if not poses:
+            return
+        # Get the last selected pose name
+        pose_name = poses[-1]
+        # Get the current solver
+        solver = self._get_selected_solvers()[-1]
+        # Create a popup to get the new pose name
+        new_name, ok = QtWidgets.QInputDialog.getText(self, 'Rename Pose', 'New Pose Name:')
+        # Hack to fix broken styling caused by using a QInputDialog
+        self.win.rename_pose_BTN.setEnabled(False)
+        self.win.rename_pose_BTN.setEnabled(True)
+        # Exit if no new name is specified
+        if not new_name:
+            return
+        # Get the existing pose names
+        existing_names = [self.win.pose_LIST.item(i).text().lower() for i in range(self.win.pose_LIST.count())]
+        # If the pose name already exists, log it and exit
+        if new_name.lower() in existing_names:
+            LOG.error("Pose '{pose_name}' already exists".format(pose_name=new_name))
+            return
+        # Pose doesn't already exist, rename it
+        self.event_rename_pose.emit(pose_name, new_name, solver)
+
+    def _update_pose(self):
+        """
+        Update the pose for the given solver
+        """
+
+        # Get the current pose selection
+        poses = self._get_selected_poses()
+        # Exit early if nothing is selected
+        if not poses:
+            return
+        # Get the last selected pose name
+        pose_name = poses[-1]
+        # Get the current solver
+        solver = self._get_selected_solvers()[-1]
+        # Update the pose
+        self.event_update_pose.emit(pose_name, solver)
+
+    # ================================================== IO ========================================================== #
+
+    def _import_drivers(self):
+        """
+        Generate a popup to find a json file to import serialized solver data from
+        """
+        # Get a json file path
+        file_path = QtWidgets.QFileDialog.getOpenFileName(None, "Pose Wrangler Format", "", "*.json")[0]
+        # If no path is specified, exit early
+        if file_path == "":
+            return
+        # Import the drivers
+        self.event_import_drivers.emit(file_path)
+
+    def _export_drivers(self, all_drivers=False):
+        """
+        Export drivers to a file
+        :param all_drivers :type bool: should all drivers be exported or just the current selection?
+        """
+        # Get the export file path
+        file_path = QtWidgets.QFileDialog.getSaveFileName(None, "Pose Wrangler Format", "", "*.json")[0]
+        # If no path is specified, exit early
+        if file_path == "":
+            return
+
+        # If all drivers is specified, get all solvers
+        if all_drivers:
+            target_solvers = []
+        else:
+            # Get the currently selected solvers
+            target_solvers = self._get_selected_solvers()
+            # If no solvers found, skip export
+            if not target_solvers:
+                LOG.warning("Unable to export. No solvers selected")
+                return
+
+        # Export drivers
+        self.event_export_drivers.emit(file_path, target_solvers)
+
+    # =============================================== Utilities ====================================================== #
+    def _open_documentation(self):
+        """
+        Open the documentation
+        """
+        index_html = os.path.abspath(
+            os.path.join(os.path.dirname(__file__), '../..', 'docs', 'site', 'html', 'index.html')
+        )
+        webbrowser.open(index_html)
+
+    def _set_stylesheet(self):
+        """
+        Load the style.qss file and set the stylesheet
+        :return:
+        """
+        if bool(int(settings.SettingsManager.get_setting("UseMayaStyle") or 0)):
+            styles_path = os.path.join(os.path.dirname(__file__), 'maya_style.qss')
+        else:
+            styles_path = os.path.join(os.path.dirname(__file__), 'style.qss')
+
+        with open(styles_path) as style:
+            self.setStyleSheet(style.read())
+
+    def _toggle_stylesheet(self, use_maya_style=False):
+        """
+        Toggles between the maya and UE stylesheet
+        :param use_maya_style :type bool: on or off
+        """
+        settings.SettingsManager.set_setting("UseMayaStyle", int(use_maya_style))
+        self._set_stylesheet()
+
+    def _select_in_scene(self, list_widget=None, item=None):
+        """
+        Select the specified items in the scene
+        :param list_widget :type QtWidgets.QListWidget or None: optional list widget to select from
+        :param item :type QtWidgets.QListWidgetItem or None: optional item to select
+        """
+        # If no item is provided, select all the items from the list widget specified
+        if item is None:
+            items = [list_widget.item(i).text() for i in range(list_widget.count())]
+        # Otherwise select the current item
+        else:
+            items = [item.text()]
+        # If we have items, select them
+        if items:
+            self.event_select.emit(items)
+
+    def _solver_context_menu_requested(self, point):
+        """
+        Create a context menu for the solver list widget
+        :param point :type QtCore.QPoint: screen position of the request
+        """
+        # Create a new menu
+        menu = QtWidgets.QMenu(parent=self)
+        self.event_get_valid_actions.emit(self.get_context())
+
+        # Dict to store sub menu name: sub menu
+        sub_menus = {}
+        # Iterate through the valid actions
+        for action in self._valid_actions:
+            # Set the current menu to the base menu
+            current_menu = menu
+            # If the action has a category
+            if action.__category__:
+                # If the category doesn't already exist, create it
+                if action.__category__ not in sub_menus:
+                    sub_menus[action.__category__] = menu.addMenu(action.__category__)
+                # Set the current menu to the category menu
+                current_menu = sub_menus[action.__category__]
+            # Create a new action on the current menu
+            action_widget = current_menu.addAction(action.__display_name__)
+            action_widget.setToolTip(action.__tooltip__)
+            # Connect the action trigger to execute the action, passing through the action and data to execute
+            action_widget.triggered.connect(partial(self._trigger_context_menu_action, action))
+        # Draw the menu at the current cursor pos
+        menu.exec_(QtGui.QCursor.pos())
+
+    def _trigger_context_menu_action(self, action):
+        """
+        Execute the specified action with the given data
+        :param action :type base_action.BaseAction: action class
+        """
+        # Execute the action with the data
+        action.execute(ui_context=self.get_context())

Scripts/Animation/epic_pose_wrangler/v2/view/style.qss

@@ -0,0 +1,204 @@
+QWidget {
+    background-color: rgb(27, 28, 30);
+    color: rgb(200, 200, 200);
+}
+
+
+QMenu {
+    background-color: rgb(4, 4, 4);
+}
+
+QMenu::item:selected {
+    background-color: rgb(50, 50, 50);
+}
+
+QWidget:disabled {
+    color: rgb(112, 117, 120);
+}
+
+QLineEdit {
+    border-radius: 2px;
+    padding-left: 7px;
+    padding-right: 7px;
+    padding-top: 5px;
+    padding-bottom: 5px;
+    selection-background-color: rgb(5, 127, 255);
+    background: rgb(4, 4, 4);
+
+}
+
+QDoubleSpinBox {
+    border-radius: 2px;
+    selection-background-color: rgb(5, 127, 255);
+    background: rgb(4, 4, 4);
+
+}
+
+QSpinBox {
+    border-radius: 2px;
+    selection-background-color: rgb(5, 127, 255);
+    background: rgb(4, 4, 4);
+
+}
+
+QComboBox {
+    background-color: #2c2d2f;
+    border-radius: 5px;
+}
+
+QScrollArea {
+    border: 2px solid rgb(9, 10, 12);
+}
+
+QFrame#background {
+    border: 2px solid rgb(9, 10, 12);
+}
+
+QListWidget {
+    background-color: rgb(15, 15, 15);
+}
+
+QListWidget[Log=true] {
+    background-color: rgb(15, 15, 15);
+    background-image: url("PoseWrangler:epic.png");
+    background-repeat: no-repeat;
+    background-position: bottom right;
+    background-attachment: fixed;
+}
+
+QFrame {
+    border-radius: 5px;
+    margin-bottom: 5px;
+}
+
+QTreeWidget QHeaderView:section {
+    border-style: none;
+    padding: 8px;
+    color: rgb(0, 255, 0);
+    background-color: #1e2126;
+}
+
+QPushButton {
+    border-radius: 2px;
+    padding-top: 5px;
+    padding-bottom: 5px;
+    padding-left: 10px;
+    padding-right: 10px;
+    color: rgb(255, 255, 255);
+    background-color: rgb(40, 40, 40);
+}
+
+
+QPushButton:hover {
+    background: rgb(100, 100, 100);
+}
+
+QPushButton:pressed {
+    background: rgb(41, 164, 255);
+}
+
+
+QProgressBar {
+    background: rgb(50, 50, 50);
+    color: rgb(10, 10, 10);
+    border-radius: 5px;
+    border: 1px solid rgb(100, 100, 100);
+    text-align: center;
+    font-size: 11px;
+    font-weight: bold;
+}
+
+QProgressBar::chunk {
+    border-radius: 5px;
+    background: QLinearGradient(
+    x1:1,
+    y1: 0,
+    x2: 0,
+    y2: 0,
+    stop: 1 rgb(41, 164, 255),
+    stop: 0.4 rgb(5, 127, 255));
+    text-align: center;
+    font-weight: bold;
+}
+
+QScrollBar::handle:vertical {
+    background: rgb(100, 100, 100);
+    border-radius: 5px;
+}
+
+QScrollBar::sub-page:vertical {
+    border-radius: -5px;
+    background: rgb(15, 15, 15);
+}
+
+QScrollBar::add-page:vertical {
+    border-radius: -5px;
+    background: rgb(15, 15, 15);
+}
+
+QScrollBar::handle:horizontal {
+    background: rgb(100, 100, 100);
+    border-radius: 5px;
+}
+
+QScrollBar::sub-page:horizontal {
+    border-radius: -5px;
+    background: rgb(15, 15, 15);
+}
+
+QScrollBar::add-page:horizontal {
+    border-radius: -5px;
+    background: rgb(15, 15, 15);
+}
+
+QToolTip {
+    border-radius: 10px;
+    color: rgb(255, 255, 255);
+    background-color: rgb(10, 10, 10);
+    padding: 5px;
+    border: 0px;
+}
+
+QCheckBox {
+    width: 13px;
+    height: 13px;
+}
+
+QCheckBox::indicator {
+    width: 13px;
+    height: 13px;
+}
+
+QGroupBox {
+    border: 0px solid rgb(100, 100, 100);
+    border-radius: 0px;
+    padding: 10px;
+}
+
+QLabel[heading=true] {
+    background-color: rgb(50, 50, 50);
+    border-radius: 0px;
+    padding: 4px;
+}
+
+QPushButton[Category=true] {
+    text-align: left;
+    background-color: #323232;
+}
+
+QPushButton::hover[Category=true] {
+    text-align: left;
+    background-color: #323232;
+}
+
+QPushButton[LogButton=true] {
+    background-color: #323232;
+}
+
+QPushButton::hover[LogButton=true] {
+    background-color: #474646;
+}
+
+QPushButton::checked[LogButton=true] {
+    background-color: #202328;
+}

Scripts/Animation/epic_pose_wrangler/v2/view/ui_context.py

@@ -0,0 +1,45 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+class PoseWranglerUIContext(object):
+    def __init__(
+            self, current_solvers, current_poses, current_drivers, current_driven, solvers, poses, drivers, driven
+    ):
+        self._current_solvers = current_solvers
+        self._current_poses = current_poses
+        self._current_drivers = current_drivers
+        self._current_driven = current_driven
+        self._solvers = solvers
+        self._poses = poses
+        self._drivers = drivers
+        self._driven = driven
+
+    @property
+    def current_solvers(self):
+        return self._current_solvers
+
+    @property
+    def current_poses(self):
+        return self._current_poses
+
+    @property
+    def current_drivers(self):
+        return self._current_drivers
+
+    @property
+    def current_driven(self):
+        return self._current_driven
+
+    @property
+    def solvers(self):
+        return self._solvers
+
+    @property
+    def poses(self):
+        return self._poses
+
+    @property
+    def drivers(self):
+        return self._drivers
+
+    @property
+    def driven(self):
+        return self._driven

Scripts/Animation/epic_pose_wrangler/v2/view/widget/category.py

@@ -0,0 +1,44 @@
+#  Copyright Epic Games, Inc. All Rights Reserved.
+from Qt import QtCore, QtGui, QtWidgets
+
+class CategoryWidget(QtWidgets.QWidget):
+    def __init__(self, name):
+        super(CategoryWidget, self).__init__()
+
+        self.setContentsMargins(0, 0, 0, 0)
+        main_layout = QtWidgets.QVBoxLayout()
+        main_layout.setContentsMargins(0, 0, 0, 0)
+        self.setLayout(main_layout)
+
+        self._category_button = QtWidgets.QPushButton(name)
+        font = self._category_button.font()
+        font.setBold(True)
+        font.setPointSize(10)
+        self._category_button.setFont(font)
+        self._category_button.setIcon(QtGui.QIcon(QtGui.QPixmap("PoseWrangler:frame_open.png")))
+        self._category_button.setIconSize(QtCore.QSize(16, 16))
+        self._category_button.clicked.connect(self._toggle_category_visibility)
+        self._category_button.setCheckable(True)
+        self._category_button.setChecked(True)
+        self._category_button.setProperty("Category", True)
+        main_layout.addWidget(self._category_button)
+
+        self._category_container = QtWidgets.QWidget()
+        self._category_container.setContentsMargins(0, 0, 0, 0)
+        self._category_layout = QtWidgets.QVBoxLayout()
+        self._category_layout.setContentsMargins(0, 0, 0, 0)
+        self._category_layout.setSpacing(0)
+        self._category_container.setLayout(self._category_layout)
+        main_layout.addWidget(self._category_container)
+
+    def _toggle_category_visibility(self):
+        self._category_container.setVisible(self._category_button.isChecked())
+        self._category_button.setIcon(
+            QtGui.QIcon(QtGui.QPixmap("PoseWrangler:frame_open.png"))
+            if self._category_button.isChecked() else QtGui.QIcon(
+                QtGui.QPixmap("PoseWrangler:frame_closed.png")
+            )
+        )
+
+    def add_extension(self, widget):
+        self._category_layout.addWidget(widget)