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3c77014348
- Currently gated by a setting in Editor Preferences..Graph Editors - Alt+LMB Click on the spline to break the connection - Ctrl+LMB Click on the spline to move the connection to a different pin - Hover over the spline to highlight it [CL 2483923 by Michael Noland in Main branch]
135 lines
4.9 KiB
C++
135 lines
4.9 KiB
C++
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "GraphSplineOverlapResult.h"
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/////////////////////////////////////////////////////
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GRAPHEDITOR_API DECLARE_LOG_CATEGORY_EXTERN(LogConnectionDrawingPolicy, Log, All);
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/////////////////////////////////////////////////////
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// FGeometryHelper
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class GRAPHEDITOR_API FGeometryHelper
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{
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public:
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static FVector2D VerticalMiddleLeftOf(const FGeometry& SomeGeometry);
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static FVector2D VerticalMiddleRightOf(const FGeometry& SomeGeometry);
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static FVector2D CenterOf(const FGeometry& SomeGeometry);
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static void ConvertToPoints(const FGeometry& Geom, TArray<FVector2D>& Points);
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/** Find the point on line segment from LineStart to LineEnd which is closest to Point */
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static FVector2D FindClosestPointOnLine(const FVector2D& LineStart, const FVector2D& LineEnd, const FVector2D& TestPoint);
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static FVector2D FindClosestPointOnGeom(const FGeometry& Geom, const FVector2D& TestPoint);
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};
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/////////////////////////////////////////////////////
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// FConnectionParameters
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struct GRAPHEDITOR_API FConnectionParams
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{
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FLinearColor WireColor;
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UEdGraphPin* AssociatedPin1;
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UEdGraphPin* AssociatedPin2;
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float WireThickness;
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bool bDrawBubbles;
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bool bUserFlag1;
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bool bUserFlag2;
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EEdGraphPinDirection StartDirection;
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EEdGraphPinDirection EndDirection;
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FConnectionParams()
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: WireColor(FLinearColor::White)
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, AssociatedPin1(nullptr)
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, AssociatedPin2(nullptr)
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, WireThickness(1.0f)
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, bDrawBubbles(false)
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, bUserFlag1(false)
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, bUserFlag2(false)
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, StartDirection(EGPD_Output)
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, EndDirection(EGPD_Input)
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{
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}
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};
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/////////////////////////////////////////////////////
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// FConnectionDrawingPolicy
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// This class draws the connections for an UEdGraph composed of pins and nodes
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class GRAPHEDITOR_API FConnectionDrawingPolicy
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{
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protected:
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int32 WireLayerID;
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int32 ArrowLayerID;
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const FSlateBrush* ArrowImage;
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const FSlateBrush* MidpointImage;
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const FSlateBrush* BubbleImage;
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const UGraphEditorSettings* Settings;
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public:
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FVector2D ArrowRadius;
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FVector2D MidpointRadius;
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FGraphSplineOverlapResult SplineOverlapResult;
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protected:
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float ZoomFactor;
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float HoverDeemphasisDarkFraction;
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const FSlateRect& ClippingRect;
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FSlateWindowElementList& DrawElementsList;
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TMap< UEdGraphPin*, TSharedRef<SGraphPin> > PinToPinWidgetMap;
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TSet< UEdGraphPin* > HoveredPins;
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TMap<TSharedRef<SWidget>, FArrangedWidget>* PinGeometries;
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double LastHoverTimeEvent;
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FVector2D LocalMousePosition;
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public:
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virtual ~FConnectionDrawingPolicy() {}
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FConnectionDrawingPolicy(int32 InBackLayerID, int32 InFrontLayerID, float InZoomFactor, const FSlateRect& InClippingRect, FSlateWindowElementList& InDrawElements);
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// Update the drawing policy with the set of hovered pins (which can be empty)
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void SetHoveredPins(const TSet< TWeakObjectPtr<UEdGraphPin> >& InHoveredPins, const TArray< TSharedPtr<SGraphPin> >& OverridePins, double HoverTime);
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void SetMousePosition(const FVector2D& InMousePos);
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// Update the drawing policy with the marked pin (which may not be valid)
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void SetMarkedPin(TWeakPtr<SGraphPin> InMarkedPin);
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static float MakeSplineReparamTable(const FVector2D& P0, const FVector2D& P0Tangent, const FVector2D& P1, const FVector2D& P1Tangent, FInterpCurve<float>& OutReparamTable);
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virtual void DrawSplineWithArrow(const FVector2D& StartPoint, const FVector2D& EndPoint, const FConnectionParams& Params);
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virtual void DrawSplineWithArrow(const FGeometry& StartGeom, const FGeometry& EndGeom, const FConnectionParams& Params);
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virtual FVector2D ComputeSplineTangent(const FVector2D& Start, const FVector2D& End) const;
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virtual void DrawConnection(int32 LayerId, const FVector2D& Start, const FVector2D& End, const FConnectionParams& Params);
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virtual void DrawPreviewConnector(const FGeometry& PinGeometry, const FVector2D& StartPoint, const FVector2D& EndPoint, UEdGraphPin* Pin);
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// Give specific editor modes a chance to highlight this connection or darken non-interesting connections
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virtual void DetermineWiringStyle(UEdGraphPin* OutputPin, UEdGraphPin* InputPin, /*inout*/ FConnectionParams& Params);
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virtual void Draw(TMap<TSharedRef<SWidget>, FArrangedWidget>& InPinGeometries, FArrangedChildren& ArrangedNodes);
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virtual void DetermineLinkGeometry(
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FArrangedChildren& ArrangedNodes,
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TSharedRef<SWidget>& OutputPinWidget,
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UEdGraphPin* OutputPin,
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UEdGraphPin* InputPin,
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/*out*/ FArrangedWidget*& StartWidgetGeometry,
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/*out*/ FArrangedWidget*& EndWidgetGeometry
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);
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virtual void SetIncompatiblePinDrawState(const TSharedPtr<SGraphPin>& StartPin, const TSet< TSharedRef<SWidget> >& VisiblePins);
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virtual void ResetIncompatiblePinDrawState(const TSet< TSharedRef<SWidget> >& VisiblePins);
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virtual void ApplyHoverDeemphasis(UEdGraphPin* OutputPin, UEdGraphPin* InputPin, /*inout*/ float& Thickness, /*inout*/ FLinearColor& WireColor);
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virtual bool IsConnectionCulled( const FArrangedWidget& StartLink, const FArrangedWidget& EndLink ) const;
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};
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