// Copyright 1998-2014 Epic Games, Inc. All Rights Reserved.

#pragma once

// This class draws the connections for an UEdGraph with a behavior tree schema
class ENVIRONMENTQUERYEDITOR_API FEnvironmentQueryConnectionDrawingPolicy : public FConnectionDrawingPolicy
{
protected:
	UEdGraph* GraphObj;

	TMap<UEdGraphNode*, int32> NodeWidgetMap;
public:
	//
	FEnvironmentQueryConnectionDrawingPolicy(int32 InBackLayerID, int32 InFrontLayerID, float ZoomFactor, const FSlateRect& InClippingRect, FSlateWindowElementList& InDrawElements, UEdGraph* InGraphObj);

	// FConnectionDrawingPolicy interface 
	virtual void DetermineWiringStyle(UEdGraphPin* OutputPin, UEdGraphPin* InputPin, /*inout*/ float& Thickness, /*inout*/ FLinearColor& WireColor, /*inout*/ bool& bDrawBubbles, /*inout*/ bool& bBidirectional) override;
	virtual void Draw(TMap<TSharedRef<SWidget>, FArrangedWidget>& PinGeometries, FArrangedChildren& ArrangedNodes) override;
	virtual void DrawSplineWithArrow(FGeometry& StartGeom, FGeometry& EndGeom, const FLinearColor& WireColor, float WireThickness, bool bDrawBubbles, bool Bidirectional) override;
	virtual void DrawSplineWithArrow(const FVector2D& StartPoint, const FVector2D& EndPoint, const FLinearColor& WireColor, float WireThickness, bool bDrawBubbles, bool Bidirectional) override;
	virtual void DrawPreviewConnector(const FGeometry& PinGeometry, const FVector2D& StartPoint, const FVector2D& EndPoint, UEdGraphPin* Pin) override;
	virtual void DrawConnection(int32 LayerId, const FVector2D& Start, const FVector2D& End, const FLinearColor& InColor, float Thickness, bool bDrawBubbles) override;
	// End of FConnectionDrawingPolicy interface

protected:
	void Internal_DrawLineWithArrow(const FVector2D& StartAnchorPoint, const FVector2D& EndAnchorPoint, const FLinearColor& WireColor, float WireThickness, bool bDrawBubbles);
};