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UnrealEngine/Engine/Source/Editor/SceneOutliner/Public/SOutlinerTreeView.h
2025-05-18 13:04:45 +08:00

170 lines
6.0 KiB
C++

// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
#include "CoreMinimal.h"
#include "SceneOutlinerFwd.h"
#include "Input/Reply.h"
#include "Widgets/SWidget.h"
#include "Widgets/DeclarativeSyntaxSupport.h"
#include "Widgets/Views/STableRow.h"
#include "Widgets/Views/STreeView.h"
#include "Animation/SlateSprings.h"
class SSceneOutlinerTreeView : public STreeView< FSceneOutlinerTreeItemPtr >
{
public:
/** Construct this widget */
void Construct(const FArguments& InArgs, TSharedRef<SSceneOutliner> Owner);
void FlashHighlightOnItem( FSceneOutlinerTreeItemPtr FlashHighlightOnItem );
const TWeakPtr<SSceneOutliner>& GetOutlinerPtr() { return SceneOutlinerWeak; }
protected:
virtual FReply OnDragOver( const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent ) override;
virtual void OnDragLeave( const FDragDropEvent& DragDropEvent ) override;
virtual FReply OnDrop( const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent ) override;
private:
virtual void Private_UpdateParentHighlights() override;
/** Weak reference to the outliner widget that owns this list */
TWeakPtr<SSceneOutliner> SceneOutlinerWeak;
};
/** Widget that represents a row in the outliner's tree control. Generates widgets for each column on demand. */
class SSceneOutlinerTreeRow
: public SMultiColumnTableRow< FSceneOutlinerTreeItemPtr >
{
public:
SLATE_BEGIN_ARGS( SSceneOutlinerTreeRow ) {}
/** The list item for this row */
SLATE_ARGUMENT( FSceneOutlinerTreeItemPtr, Item )
SLATE_END_ARGS()
/** Construct function for this widget */
void Construct( const FArguments& InArgs, const TSharedRef<SSceneOutlinerTreeView>& OutlinerTreeView, TSharedRef<SSceneOutliner> SceneOutliner );
/** Overridden from SMultiColumnTableRow. Generates a widget for this column of the tree row. */
virtual TSharedRef<SWidget> GenerateWidgetForColumn( const FName& ColumnName ) override;
void FlashHighlight();
protected:
virtual FReply OnMouseButtonDown(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
virtual FReply OnMouseButtonUp(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
virtual FReply OnMouseButtonDoubleClick(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
virtual void OnDragEnter( const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent ) override;
virtual void OnDragLeave( const FDragDropEvent& DragDropEvent ) override;
virtual FReply OnDragOver( const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent ) override;
virtual FReply OnDrop( const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent ) override;
bool IsRowEnabled() const;
private:
/** Weak reference to the outliner widget that owns our list */
TWeakPtr< SSceneOutliner > SceneOutlinerWeak;
/** The item associated with this row of data */
TWeakPtr<ISceneOutlinerTreeItem> Item;
protected:
virtual void Tick( const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime ) override;
virtual int32 OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const override;
private:
/** How many pixels to extend the highlight rectangle's left side horizontally */
static const float HighlightRectLeftOffset;
/** How many pixels to extend the highlight rectangle's right side horizontally */
static const float HighlightRectRightOffset;
/** How quickly the highlight 'targeting' rectangle will slide around. Larger is faster. */
static const float HighlightTargetSpringConstant;
/** Duration of animation highlight target effects */
static const float HighlightTargetEffectDuration;
/** Opacity of the highlight target effect overlay */
static const float HighlightTargetOpacity;
/** How large the highlight target effect will be when highlighting, as a scalar percentage of font height */
static const float LabelChangedAnimOffsetPercent;
/** Highlight "targeting" visual effect left position */
FFloatSpring1D HighlightTargetLeftSpring;
/** Highlight "targeting" visual effect right position */
FFloatSpring1D HighlightTargetRightSpring;
/** Last time that the user had a major interaction with the highlight */
double LastHighlightInteractionTime;
};
/** Widget that represents a pinned row in the outliner's tree control.*/
class SSceneOutlinerPinnedTreeRow
: public SMultiColumnTableRow< FSceneOutlinerTreeItemPtr >
{
public:
SLATE_BEGIN_ARGS(SSceneOutlinerPinnedTreeRow) {}
/** The list item for this row */
SLATE_ARGUMENT(FSceneOutlinerTreeItemPtr, Item)
SLATE_END_ARGS()
/** Construct function for this widget */
void Construct(const FArguments& InArgs, const TSharedRef<SSceneOutlinerTreeView>& OutlinerTreeView, TSharedRef<SSceneOutliner> SceneOutliner);
/** Overridden from SMultiColumnTableRow. Generates a widget for this column of the tree row. */
virtual TSharedRef<SWidget> GenerateWidgetForColumn(const FName& ColumnName) override;
protected:
virtual void ConstructChildren(ETableViewMode::Type InOwnerTableMode, const TAttribute<FMargin>& InPadding, const TSharedRef<SWidget>& InContent) override
{
STableRow<FSceneOutlinerTreeItemPtr>::Content = InContent;
// We don't want the expander by default.
this->ChildSlot
.Padding(InPadding)
[
InContent
];
}
virtual void OnDragEnter(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent) override;
virtual void OnDragLeave(const FDragDropEvent& DragDropEvent) override;
virtual FReply OnDragOver(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent) override;
virtual FReply OnDrop(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent) override;
private:
/** Weak reference to the outliner widget that owns our list */
TWeakPtr< SSceneOutliner > SceneOutlinerWeak;
/** Weak reference to the tree view that contains our list */
TWeakPtr< SSceneOutlinerTreeView > OutlinerTreeViewWeak;
/** The item associated with this row of data */
TWeakPtr<ISceneOutlinerTreeItem> Item;
};