C++ FGeometry::AbsoluteToLocal方法代码示例

FReply SPaperEditorViewport::OnMouseButtonDown(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
	TotalMouseDelta = 0;

	if (MouseEvent.GetEffectingButton() == EKeys::RightMouseButton)
	{
		// RIGHT BUTTON is for dragging and Context Menu.
		FReply ReplyState = FReply::Handled();
		ReplyState.CaptureMouse( SharedThis(this) );
		ReplyState.UseHighPrecisionMouseMovement( SharedThis(this) );

		SoftwareCursorPosition = PanelCoordToGraphCoord( MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() ) );

		// clear any interpolation when you manually pan
		//DeferredMovementTargetObject = nullptr;

		return ReplyState;
	}
	else if (MouseEvent.GetEffectingButton() == EKeys::LeftMouseButton)
	{
		// START MARQUEE SELECTION.
		const FVector2D GraphMousePos = PanelCoordToGraphCoord( MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() ) );
		Marquee.Start( GraphMousePos, FMarqueeOperation::OperationTypeFromMouseEvent(MouseEvent) );

		// Trigger a selection update now so that single-clicks without a drag still select something
		OnSelectionChanged.ExecuteIfBound(Marquee, true);
		PaperViewportClient->Invalidate();

		return FReply::Handled().CaptureMouse( SharedThis(this) );
	}
	else
	{
		return FReply::Unhandled();
	}
}

void SGraphNodeDocumentation::Tick( const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime )
{
	if( !bUserIsDragging )
	{
		ChildWidgetVisibility = EVisibility::HitTestInvisible;
		FVector2D LocalMouseCoordinates = AllottedGeometry.AbsoluteToLocal( FSlateApplication::Get().GetCursorPos() );

		EResizableWindowZone CurrMouseZone = FindMouseZone( LocalMouseCoordinates );
		
		if( CurrMouseZone == CRWZ_InWindow )
		{
			ChildWidgetVisibility = EVisibility::Visible;
		}
	}
	// Check Cached Links to determine if we need to update the documention link/excerpt
	if( CachedDocumentationLink != GraphNode->GetDocumentationLink() ||
		CachedDocumentationExcerpt != GraphNode->GetDocumentationExcerptName())
	{
		GraphNode->NodeWidth = 0.f;
		GraphNode->NodeHeight = 0.f;
		UpdateGraphNode();
	}

	SGraphNodeResizable::Tick( AllottedGeometry, InCurrentTime, InDeltaTime );
}

FReply SGraphPanel::OnDragOver( const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent )
{
	TSharedPtr<FDragDropOperation> Operation = DragDropEvent.GetOperation();
	if (!Operation.IsValid())
	{
		return FReply::Unhandled();
	}

	// Handle Read only graphs
	if( !IsEditable.Get() )
	{
		TSharedPtr<FGraphEditorDragDropAction> GraphDragDropOp = DragDropEvent.GetOperationAs<FGraphEditorDragDropAction>();

		if( GraphDragDropOp.IsValid() )
		{
			GraphDragDropOp->SetDropTargetValid( false );
		}
		else
		{
			TSharedPtr<FDecoratedDragDropOp> AssetOp = DragDropEvent.GetOperationAs<FDecoratedDragDropOp>();
			if( AssetOp.IsValid() )
			{
				FText Tooltip = AssetOp->GetHoverText();
				if( Tooltip.IsEmpty() )
				{
					Tooltip = NSLOCTEXT( "GraphPanel", "DragDropOperation", "Graph is Read-Only" );
				}
				AssetOp->SetToolTip( Tooltip, FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error")));
			}
		}
		return FReply::Handled();
	}

	if( Operation->IsOfType<FGraphEditorDragDropAction>() )
	{
		PreviewConnectorEndpoint = MyGeometry.AbsoluteToLocal( DragDropEvent.GetScreenSpacePosition() );
		return FReply::Handled();
	}
	else if (Operation->IsOfType<FExternalDragOperation>())
	{
		return AssetUtil::CanHandleAssetDrag(DragDropEvent);
	}
	else if (Operation->IsOfType<FAssetDragDropOp>())
	{
		if(GraphObj != NULL && GraphObj->GetSchema())
		{
			TSharedPtr<FAssetDragDropOp> AssetOp = StaticCastSharedPtr<FAssetDragDropOp>(Operation);
			bool bOkIcon = false;
			FString TooltipText;
			GraphObj->GetSchema()->GetAssetsGraphHoverMessage(AssetOp->AssetData, GraphObj, TooltipText, bOkIcon);
			const FSlateBrush* TooltipIcon = bOkIcon ? FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.OK")) : FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));;
			AssetOp->SetToolTip(FText::FromString(TooltipText), TooltipIcon);
		}
		return FReply::Handled();
	} 
	else
	{
		return FReply::Unhandled();
	}
}

FReply SProfilerThreadView::OnMouseButtonUp( const FGeometry& MyGeometry, const FPointerEvent& MouseEvent )
{
	FReply Reply = FReply::Unhandled();

	if( IsReady() )
	{
		const FVector2D MousePositionOnButtonUp = MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() );
		const bool bIsValidForMouseClick = MousePositionOnButtonUp.Equals( MousePositionOnButtonDown, MOUSE_SNAP_DISTANCE );

		if( MouseEvent.GetEffectingButton() == EKeys::LeftMouseButton )
		{
			if( bIsLeftMousePressed )
			{
				// Release the mouse, we are no longer dragging.
				Reply = FReply::Handled().ReleaseMouseCapture();
			}

			bIsLeftMousePressed = false;
		}
		else if( MouseEvent.GetEffectingButton() == EKeys::RightMouseButton )
		{
			if( bIsRightMousePressed )
			{
				if( bIsValidForMouseClick )
				{
					ShowContextMenu( MouseEvent.GetScreenSpacePosition() );
					Reply = FReply::Handled();
				}
			}
			bIsRightMousePressed = false;
		}
	}

	return Reply;
}

FGradientStopMark SColorGradientEditor::AddStop( const FVector2D& Position, const FGeometry& MyGeometry, bool bColorStop )
{
	FScopedTransaction AddStopTrans( LOCTEXT("AddGradientStop", "Add Gradient Stop") );

	CurveOwner->ModifyOwner();

	FTrackScaleInfo ScaleInfo(ViewMinInput.Get(),  ViewMaxInput.Get(), 0.0f, 1.0f, MyGeometry.Size);

	FVector2D LocalPos = MyGeometry.AbsoluteToLocal( Position );

	float NewStopTime = ScaleInfo.LocalXToInput( LocalPos.X );
			
	TArray<FRichCurveEditInfo> Curves = CurveOwner->GetCurves();

	FGradientStopMark NewStop;
	NewStop.Time = NewStopTime;

	if( bColorStop )
	{
		FRichCurve* RedCurve = Curves[0].CurveToEdit;
		FRichCurve* GreenCurve = Curves[1].CurveToEdit;
		FRichCurve* BlueCurve = Curves[2].CurveToEdit;
		
		NewStop.RedKeyHandle = RedCurve->AddKey( NewStopTime, LastModifiedColor.R );
		NewStop.GreenKeyHandle = GreenCurve->AddKey( NewStopTime, LastModifiedColor.G );
		NewStop.BlueKeyHandle = BlueCurve->AddKey( NewStopTime, LastModifiedColor.B );
	}
	else
	{
		FRichCurve* AlphaCurve = Curves[3].CurveToEdit;
		NewStop.AlphaKeyHandle = AlphaCurve->AddKey( NewStopTime, LastModifiedColor.A );
	}

	return NewStop;
}

FReply FSequencerEditTool_Movement::OnMouseMove(SWidget& OwnerWidget, const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
	if (DelayedDrag.IsSet())
	{
		const FVirtualTrackArea VirtualTrackArea = SequencerWidget.Pin()->GetVirtualTrackArea();

		FReply Reply = FReply::Handled();

		if (DelayedDrag->IsDragging())
		{
			// If we're already dragging, just update the drag op if it exists
			if (DragOperation.IsValid())
			{
				DragOperation->OnDrag(MouseEvent, MyGeometry.AbsoluteToLocal(MouseEvent.GetScreenSpacePosition()), VirtualTrackArea);
			}
		}
		// Otherwise we can attempt a new drag
		else if (DelayedDrag->AttemptDragStart(MouseEvent))
		{
			DragOperation = CreateDrag();

			if (DragOperation.IsValid())
			{
				DragOperation->OnBeginDrag(MouseEvent, DelayedDrag->GetInitialPosition(), VirtualTrackArea);

				// Steal the capture, as we're now the authoritative widget in charge of a mouse-drag operation
				Reply.CaptureMouse(OwnerWidget.AsShared());
			}
		}

		return Reply;
	}
	return FReply::Unhandled();
}

/**
	* The system calls this method to notify the widget that a mouse moved within it. This event is bubbled.
	*
	* @param MyGeometry The Geometry of the widget receiving the event
	* @param MouseEvent Information about the input event
	*
	* @return Whether the event was handled along with possible requests for the system to take action.
	*/
FReply SGraphBar::OnMouseMove( const FGeometry& MyGeometry, const FPointerEvent& MouseEvent )
{
	const float HoverX = ( MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() ).X / MyGeometry.Size.X ) / Zoom - Offset / Zoom;

	int32 HoveredEventIndex = INDEX_NONE;

	for( int32 EventIndex = 0; EventIndex < Events.Num(); EventIndex++ )
	{
		TSharedPtr< FVisualizerEvent > Event = Events[ EventIndex ];

		if( HoverX >= Event->Start && HoverX < ( Event->Start + Event->Duration ) )
		{
			HoveredEventIndex = EventIndex;
			break;
		}
	}

	if( HoveredEventIndex != LastHoveredEvent )
	{
		if( HoveredEventIndex != INDEX_NONE )
		{
			this->SetToolTipText( FText::FromString(Events[HoveredEventIndex]->EventName) );
		}
		else
		{
			this->SetToolTipText( FText::GetEmpty() );
		}
		LastHoveredEvent = HoveredEventIndex;
	}

	return SLeafWidget::OnMouseMove( MyGeometry, MouseEvent );
}

FReply SPaperEditorViewport::OnMouseWheel(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
	// We want to zoom into this point; i.e. keep it the same fraction offset into the panel
	const FVector2D WidgetSpaceCursorPos = MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() );
	FVector2D PointToMaintainGraphSpace = PanelCoordToGraphCoord( WidgetSpaceCursorPos );


	const int32 ZoomLevelDelta = FMath::FloorToInt(MouseEvent.GetWheelDelta());

	const bool bAllowFullZoomRange = true;
	const float OldZoomLevel = ZoomLevel;

	if (bAllowFullZoomRange)
	{
		ZoomLevel = FMath::Clamp( ZoomLevel + ZoomLevelDelta, 0, NumZoomLevels-1 );
	}
	else
	{
		// Without control, we do not allow zooming out past 1:1.
		ZoomLevel = FMath::Clamp( ZoomLevel + ZoomLevelDelta, 0, DefaultZoomLevel );
	}

	ZoomLevelFade.Play(this->AsShared());


	// Re-center the screen so that it feels like zooming around the cursor.
	ViewOffset = PointToMaintainGraphSpace - WidgetSpaceCursorPos / GetZoomAmount();

	return FReply::Handled();
}

FReply SColorGradientEditor::OnMouseMove( const FGeometry& MyGeometry, const FPointerEvent& MouseEvent )
{
	if( HasMouseCapture() && IsEditingEnabled.Get() == true )
	{
		DistanceDragged += FMath::Abs( MouseEvent.GetCursorDelta().X );
			
		if( MouseEvent.IsMouseButtonDown( EKeys::LeftMouseButton ) && SelectedStop.IsValid( *CurveOwner ) )
		{
			const float DragThresholdDist = 5.0f;
			if( !bDraggingStop )
			{
				if( DistanceDragged >= DragThresholdDist )
				{
					// Start a transaction, we just started dragging a stop
					bDraggingStop = true;
					GEditor->BeginTransaction( LOCTEXT("MoveGradientStop", "Move Gradient Stop") );
					CurveOwner->ModifyOwner();
				}

				return FReply::Handled();
			}
			else
			{
				// Already dragging a stop, move it
				FTrackScaleInfo ScaleInfo(ViewMinInput.Get(),  ViewMaxInput.Get(), 0.0f, 1.0f, MyGeometry.Size);
				float MouseTime = ScaleInfo.LocalXToInput( MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() ).X );
				MoveStop( SelectedStop, MouseTime );

				return FReply::Handled();
			}
		}
	}

	return FReply::Unhandled();
}

FReply SScrubWidget::OnMouseButtonUp( const FGeometry& MyGeometry, const FPointerEvent& MouseEvent )
{
	bool bHandleLeftMouseButton = MouseEvent.GetEffectingButton() == EKeys::LeftMouseButton && this->HasMouseCapture();
	bool bHandleRightMouseButton = MouseEvent.GetEffectingButton() == EKeys::RightMouseButton && this->HasMouseCapture() && bAllowZoom;

	if ( bHandleRightMouseButton )
	{
		bPanning = false;

		FTrackScaleInfo TimeScaleInfo(ViewInputMin.Get(), ViewInputMax.Get(), 0.f, 0.f, MyGeometry.Size);
		FVector2D CursorPos = MyGeometry.AbsoluteToLocal(MouseEvent.GetLastScreenSpacePosition());
		float NewValue = TimeScaleInfo.LocalXToInput(CursorPos.X);

		if( !bMouseMovedDuringPanning )
		{
			CreateContextMenu(NewValue, MouseEvent);
		}
		return FReply::Handled().ReleaseMouseCapture();
	}
	else if ( bHandleLeftMouseButton )
	{
		if(DraggingBar)
		{
			DraggingBar = false;
		}
		else if( bDragging )
		{
			OnEndSliderMovement.ExecuteIfBound( ValueAttribute.Get() );
		}
		else
		{
			FTrackScaleInfo TimeScaleInfo(ViewInputMin.Get(), ViewInputMax.Get(), 0.f, 0.f, MyGeometry.Size);
			FVector2D CursorPos = MyGeometry.AbsoluteToLocal(MouseEvent.GetLastScreenSpacePosition());
			float NewValue = TimeScaleInfo.LocalXToInput(CursorPos.X);

			CommitValue( NewValue, true, false );
		}

		bDragging = false;
		return FReply::Handled().ReleaseMouseCapture();

	}

	return FReply::Unhandled();
}

FReply SRealtimeProfilerLineGraph::OnMouseMove( const FGeometry& InMyGeometry, const FPointerEvent& InMouseEvent )
{	
	MousePosition = InMyGeometry.AbsoluteToLocal(InMouseEvent.GetScreenSpacePosition());

	if(bIsLeftMouseButtonDown)
	{		
		DisplayFrameDetailAtMouse(InMyGeometry,InMouseEvent);
	}
	return FReply::Handled();
}

FReply FSequencerEditTool_Movement::OnMouseButtonDown(SWidget& OwnerWidget, const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
	DelayedDrag.Reset();

	if (MouseEvent.GetEffectingButton() == EKeys::LeftMouseButton)
	{
		DelayedDrag = FDelayedDrag_Hotspot(MyGeometry.AbsoluteToLocal(MouseEvent.GetScreenSpacePosition()), EKeys::LeftMouseButton, Hotspot);
		return FReply::Handled();
	}
	return FReply::Unhandled();
}

FReply STrackNode::BeginDrag( const FGeometry& MyGeometry, const FPointerEvent& MouseEvent )
{

	FVector2D ScreenCursorPos = MouseEvent.GetScreenSpacePosition();
	FVector2D CursorPos = MyGeometry.AbsoluteToLocal(ScreenCursorPos);
	FVector2D ScreenNodePosition = MyGeometry.AbsolutePosition;// + GetOffsetRelativeToParent(MyGeometry);
	
	bBeingDragged = true;

	//void FTrackNodeDragDropOp(TSharedRef<STrackNode> TrackNode, const FVector2D &CursorPosition, const FVector2D &ScreenPositionOfNode)
	return FReply::Handled().BeginDragDrop(FTrackNodeDragDropOp::New(SharedThis(this), ScreenCursorPos, ScreenNodePosition));
}

TSharedPtr<SWidget> STrack::SummonContextMenu(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
	bool SummonedContextMenu = false;

	const bool bCloseWindowAfterMenuSelection = true;
	FMenuBuilder MenuBuilder( bCloseWindowAfterMenuSelection, EditorActions );

	FVector2D CursorPos = MouseEvent.GetScreenSpacePosition();
	float DataPos = LocalToDataX( MyGeometry.AbsoluteToLocal(CursorPos).X, MyGeometry );

	// Context menu for a node
	int NotifyIndex = GetHitNode(MyGeometry, MyGeometry.AbsoluteToLocal(CursorPos));
	if(NotifyIndex != INDEX_NONE)
	{
		if(TrackNodes[NotifyIndex]->OnNodeRightClickContextMenu.IsBound())
		{
			TrackNodes[NotifyIndex]->OnNodeRightClickContextMenu.Execute(MenuBuilder);
			SummonedContextMenu = true;
		}
	}

	// Context menu for track itself
	if(OnTrackRightClickContextMenu.IsBound())
	{
		SummonedContextMenu = true;
		OnTrackRightClickContextMenu.Execute(MenuBuilder, DataPos, DraggableBarIndex);
	}

	// Build the menu if we actually added anything to it
	TSharedPtr<SWidget> MenuContent;
	if(SummonedContextMenu)
	{
		MenuContent = MenuBuilder.MakeWidget();

		FWidgetPath WidgetPath = MouseEvent.GetEventPath() != nullptr ? *MouseEvent.GetEventPath() : FWidgetPath();
		FSlateApplication::Get().PushMenu(SharedThis(this), WidgetPath, MenuContent.ToSharedRef(), CursorPos, FPopupTransitionEffect(FPopupTransitionEffect::ContextMenu));
	}

	return MenuContent;
}

FReply SGraphPanel::OnDrop( const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent )
{
	const FVector2D NodeAddPosition = PanelCoordToGraphCoord( MyGeometry.AbsoluteToLocal( DragDropEvent.GetScreenSpacePosition() ) );

	FSlateApplication::Get().SetKeyboardFocus(AsShared(), EFocusCause::SetDirectly);

	TSharedPtr<FDragDropOperation> Operation = DragDropEvent.GetOperation();
	if (!Operation.IsValid() || !IsEditable.Get())
	{
		return FReply::Unhandled();
	}

	if (Operation->IsOfType<FGraphEditorDragDropAction>())
	{
		check(GraphObj);
		TSharedPtr<FGraphEditorDragDropAction> DragConn = StaticCastSharedPtr<FGraphEditorDragDropAction>(Operation);
		if (DragConn.IsValid() && DragConn->IsSupportedBySchema(GraphObj->GetSchema()))
		{
			return DragConn->DroppedOnPanel(SharedThis(this), DragDropEvent.GetScreenSpacePosition(), NodeAddPosition, *GraphObj);
		}

		return FReply::Unhandled();
	}
	else if (Operation->IsOfType<FActorDragDropGraphEdOp>())
	{
		TSharedPtr<FActorDragDropGraphEdOp> ActorOp = StaticCastSharedPtr<FActorDragDropGraphEdOp>(Operation);
		OnDropActor.ExecuteIfBound(ActorOp->Actors, GraphObj, NodeAddPosition);
		return FReply::Handled();
	}

	else if (Operation->IsOfType<FLevelDragDropOp>())
	{
		TSharedPtr<FLevelDragDropOp> LevelOp = StaticCastSharedPtr<FLevelDragDropOp>(Operation);
		OnDropStreamingLevel.ExecuteIfBound(LevelOp->StreamingLevelsToDrop, GraphObj, NodeAddPosition);
		return FReply::Handled();
	}
	else
	{
		if(GraphObj != NULL && GraphObj->GetSchema() != NULL)
		{
			TArray< FAssetData > DroppedAssetData = AssetUtil::ExtractAssetDataFromDrag( DragDropEvent );

			if ( DroppedAssetData.Num() > 0 )
			{
				GraphObj->GetSchema()->DroppedAssetsOnGraph( DroppedAssetData, NodeAddPosition, GraphObj );
				return FReply::Handled();
			}
		}

		return FReply::Unhandled();
	}
}