// $Revision: 1.9 $
//------------------------------------------------------------------------------
//
// Copyright (C) 1994, 1995 Taligent, Inc. All rights reserved.
//
// Project:			StockBrowser
// File:			GraphDrawer.h
// Build/Version:	1.0.0
//
// Description:		TGraphDrawer is abstract class that provides a protocol
//					for drawing into a TStandardGraph.
//
//------------------------------------------------------------------------------

#ifndef TaligentSamples_GRAPHDRAWER
#define TaligentSamples_GRAPHDRAWER

class TGraphDrawer;

#ifndef Taligent_TALIGENTTYPE
#include <Taligent/TaligentType.h>
#endif

#ifndef Taligent_BASEGEOMETRY
#include <Taligent/BaseGeometry.h>	// Included for TGRect.
#endif

#ifndef TaligentSamples_GRAPHRANGE
#include "GraphRange.h"
#endif

class TStandardGraph;
class TGrafPort;

//==============================================================================
// TGraphDrawer

class TGraphDrawer {
public:
	TaligentTypeExtensionDeclarationsMacro_Abstract(TGraphDrawer)

public:
									TGraphDrawer();
									TGraphDrawer(const TGraphDrawer& source);
	virtual							~TGraphDrawer();
	
	TGraphDrawer&					operator=(const TGraphDrawer& source);
	virtual	TStream&				operator>>=(TStream& toStream) const;
	virtual	TStream&				operator<<=(TStream& fromStream);

	virtual	const TStandardGraph&	GetTargetGraph() const;
	virtual	void					SetTargetGraph(const TStandardGraph* graph);
	
	virtual void					Prepare(const TStandardGraph& graph);
	virtual	void					DrawIntoGraph(TGrafPort& port) const = 0;
	virtual TGRect					GetBounds() const = 0;

private:
	enum 							{kOriginalVersion};
	
	const TStandardGraph*			fTargetGraph;
};

#endif