// $Revision: 1.4 $
//------------------------------------------------------------------------------
//
// Copyright (C) 1994, 1995 Taligent, Inc. All rights reserved.
//
// Project:			TaligentSelectionTool
// File:			SelectionMapping.h
// Build/Version:	1.0.0
//
// Description:		The MSelectionMapping class defines a concise, five function 
//					protocol for converting between TModelSelections and the
//					screen real estate the specified data occupies. Since 
//					coordinate systems may vary from view to view, a standard 
//					coordinate system needs to be agreed upon to put geometries 
//					into their proper screen context. Each MSelectionMapping keeps 
//					a reference to a view to establish a coordinate system for 
//					geometries passed between itself and its clients.
//
//------------------------------------------------------------------------------

#ifndef TaligentSamples_SELECTIONMAPPING
#define TaligentSamples_SELECTIONMAPPING

class MSelectionMapping;

#ifndef Taligent_GUICOMPOUNDDOCUMENT
#include <Taligent/GUICompoundDocument.h>
#endif

//................................................................................

class MSelectionMapping {
public:
								MSelectionMapping(const TViewHandle& view);
	virtual						~MSelectionMapping();
	
	virtual TGArea				GetSelectionDisplayArea(const TModelSelection& area) const = 0;
	virtual TModelSelection*	CreateInsertionPoint(const TGPoint& where) const = 0;
	virtual TModelSelection*	CreateSelectionFromPoint(const TGPoint& area) const = 0;
	virtual TModelSelection*	CreateSelectionFromArea(const TGArea& area) const = 0;
	
	TViewHandle					GetMappingView() const;
	
private:
	TViewHandle					fView;
};

#endif