165 lines
5.5 KiB
C++
165 lines
5.5 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
|
|
|
|
#pragma once
|
|
|
|
#include "Animation/CurveSequence.h"
|
|
#include "CoreMinimal.h"
|
|
#include "HAL/Platform.h"
|
|
#include "Input/CursorReply.h"
|
|
#include "Input/Reply.h"
|
|
#include "Internationalization/Text.h"
|
|
#include "Layout/Geometry.h"
|
|
#include "Layout/SlateRect.h"
|
|
#include "Math/Vector2D.h"
|
|
#include "Misc/Attribute.h"
|
|
#include "SNodePanel.h"
|
|
#include "Styling/SlateColor.h"
|
|
#include "Templates/SharedPointer.h"
|
|
#include "Templates/UniquePtr.h"
|
|
#include "Types/SlateEnums.h"
|
|
#include "Widgets/DeclarativeSyntaxSupport.h"
|
|
#include "Widgets/SCompoundWidget.h"
|
|
|
|
class FActiveTimerHandle;
|
|
class FPaintArgs;
|
|
class FSlateWindowElementList;
|
|
class FWidgetStyle;
|
|
class SWidget;
|
|
struct FGeometry;
|
|
struct FPointerEvent;
|
|
struct FSlateBrush;
|
|
|
|
class UMGEDITOR_API SDesignSurface : public SCompoundWidget
|
|
{
|
|
public:
|
|
|
|
SLATE_BEGIN_ARGS( SDesignSurface )
|
|
: _AllowContinousZoomInterpolation(false)
|
|
{ }
|
|
|
|
/** Slot for this designers content (optional) */
|
|
SLATE_DEFAULT_SLOT(FArguments, Content)
|
|
|
|
SLATE_ATTRIBUTE(bool, AllowContinousZoomInterpolation)
|
|
SLATE_END_ARGS()
|
|
|
|
void Construct(const FArguments& InArgs);
|
|
|
|
// SWidget interface
|
|
virtual void Tick(const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime) override;
|
|
virtual FCursorReply OnCursorQuery(const FGeometry& MyGeometry, const FPointerEvent& CursorEvent) const override;
|
|
virtual FReply OnMouseButtonDown(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
|
|
virtual FReply OnMouseButtonUp(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
|
|
virtual FReply OnMouseMove(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
|
|
virtual FReply OnMouseWheel(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
|
|
virtual FReply OnTouchGesture(const FGeometry& MyGeometry, const FPointerEvent& GestureEvent) override;
|
|
virtual FReply OnTouchEnded(const FGeometry& MyGeometry, const FPointerEvent& InTouchEvent) override;
|
|
virtual int32 OnPaint(const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const override;
|
|
virtual bool SupportsKeyboardFocus() const override { return true; }
|
|
// End of Swidget interface
|
|
|
|
/** Gets the current zoom factor. */
|
|
float GetZoomAmount() const;
|
|
|
|
FVector2D GraphCoordToPanelCoord(const FVector2D& GraphSpaceCoordinate) const;
|
|
FVector2D PanelCoordToGraphCoord(const FVector2D& PanelSpaceCoordinate) const;
|
|
|
|
protected:
|
|
virtual void OnPaintBackground(const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId) const;
|
|
|
|
void PaintBackgroundAsLines(const FSlateBrush* BackgroundImage, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32& DrawLayerId) const;
|
|
|
|
void ChangeZoomLevel(int32 ZoomLevelDelta, const FVector2D& WidgetSpaceZoomOrigin, bool bOverrideZoomLimiting);
|
|
|
|
void PostChangedZoom();
|
|
|
|
bool ScrollToLocation(const FGeometry& MyGeometry, FVector2D DesiredCenterPosition, const float InDeltaTime);
|
|
|
|
bool ZoomToLocation(const FVector2D& CurrentSizeWithoutZoom, const FVector2D& DesiredSize, bool bDoneScrolling);
|
|
|
|
void ZoomToFit(bool bInstantZoom);
|
|
|
|
FText GetZoomText() const;
|
|
FSlateColor GetZoomTextColorAndOpacity() const;
|
|
|
|
FVector2D GetViewOffset() const;
|
|
|
|
FSlateRect ComputeSensibleBounds() const;
|
|
|
|
protected:
|
|
virtual FSlateRect ComputeAreaBounds() const;
|
|
virtual float GetGridScaleAmount() const;
|
|
virtual int32 GetGraphRulePeriod() const;
|
|
virtual int32 GetSnapGridSize() const = 0;
|
|
|
|
protected:
|
|
/** The position within the graph at which the user is looking */
|
|
FVector2D ViewOffset;
|
|
|
|
/** The position in the grid to begin drawing at. */
|
|
FVector2D GridOrigin;
|
|
|
|
/** Should we render the grid lines? */
|
|
bool bDrawGridLines;
|
|
|
|
/** Previous Zoom Level */
|
|
int32 PreviousZoomLevel;
|
|
|
|
/** How zoomed in/out we are. e.g. 0.25f results in quarter-sized nodes. */
|
|
int32 ZoomLevel;
|
|
|
|
/** Are we panning the view at the moment? */
|
|
bool bIsPanning;
|
|
|
|
/** Are we zooming the view with trackpad at the moment? */
|
|
bool bIsZooming;
|
|
|
|
/** Allow continuous zoom interpolation? */
|
|
TAttribute<bool> AllowContinousZoomInterpolation;
|
|
|
|
/** Fade on zoom for graph */
|
|
FCurveSequence ZoomLevelGraphFade;
|
|
|
|
/** Curve that handles fading the 'Zoom +X' text */
|
|
FCurveSequence ZoomLevelFade;
|
|
|
|
// The interface for mapping ZoomLevel values to actual node scaling values
|
|
TUniquePtr<FZoomLevelsContainer> ZoomLevels;
|
|
|
|
bool bAllowContinousZoomInterpolation;
|
|
|
|
bool bTeleportInsteadOfScrollingWhenZoomingToFit;
|
|
|
|
FVector2D ZoomTargetTopLeft;
|
|
FVector2D ZoomTargetBottomRight;
|
|
FVector2D ZoomToFitPadding;
|
|
|
|
/** The Y component of mouse drag (used when zooming) */
|
|
double TotalMouseDelta;
|
|
|
|
/** Offset in the panel the user started the LMB+RMB zoom from */
|
|
FVector2D ZoomStartOffset;
|
|
|
|
/** */
|
|
FVector2D ViewOffsetStart;
|
|
|
|
/** */
|
|
FVector2D MouseDownPositionAbsolute;
|
|
|
|
/** Cumulative magnify delta from trackpad gesture */
|
|
float TotalGestureMagnify;
|
|
|
|
/** Does the user need to press Control in order to over-zoom. */
|
|
bool bRequireControlToOverZoom;
|
|
|
|
private:
|
|
/** Active timer that handles deferred zooming until the target zoom is reached */
|
|
EActiveTimerReturnType HandleZoomToFit(double InCurrentTime, float InDeltaTime);
|
|
|
|
/** The handle to the active timer */
|
|
TWeakPtr<FActiveTimerHandle> ActiveTimerHandle;
|
|
|
|
// A flag noting if we have a pending zoom to extents operation to perform next tick.
|
|
bool bDeferredZoomToExtents;
|
|
};
|