// $Revision: 1.2 $
// Copyright (C) 1994, 1995 Taligent, Inc. All rights reserved.

#ifndef TaligentSample_TILESINTERACTORS
#define TaligentSample_TILESINTERACTORS

#ifndef TaligentSample_TILESCOMMANDS
#include "TilesCommands.h"
#endif

#ifndef TaligentSample_TILESVIEW
#include "TilesView.h"
#endif

// TMoveInteractor is an interactive mouse event handler.  Once the user clicks
// on a TTile in the window, the TMoveInteractor will track mouse events, create
// a TMoveCommand and apply the command incrementally to the TTile.  In this way
// the interactive mouse actions are bound to the TMoveCommand.  TMoveInteractor
// mixes in TInteractor to handle interactive events and MMouseEventHandler to
// receive mouse events.
class TMoveInteractor : public TInteractor, public MMouseEventHandler 
{
	public:
		// The constructor takes a pointer to the view in which the mouse down
		// event occured and in which the TMoveInteractor should operate.
	    						TMoveInteractor (TTilesView *view);
	    						TMoveInteractor ();
		virtual 				~TMoveInteractor ();
			
		// The following macro must be called within class declarations in order to use Taligent 
		// Type Extensions.The macro defines a set of Taligent Type Extension utility functions.
		// This macro call matches a macro call to TaligentTypeExtensionMacro in TilesInteractors.C
		TaligentTypeExtensionDeclarationsMacro(TMoveInteractor)
		
		// MouseDown starts the interactive mouse event handling
		virtual bool			MouseDown (TMouseDownEvent& mouseDown);
		// MouseMoved applies the TMoveCommand incrementally to the current selection
		virtual bool			MouseMoved (TMouseMovedEvent& mouseMoved);
		// MouseUp finishes the interactive mouse event handling
		virtual bool			MouseUp (TMouseUpEvent& mouseDown);
		// MouseEntered and MouseExited are used to detect when the user has
		// left or reentered the view while dragging the mouse.
		virtual bool 		MouseEntered (TMouseMovedEvent& mouseEnter);
		virtual bool 		MouseExited (TMouseMovedEvent& mouseExit);
		
	protected:
		// A cleanup routine in case an exception is thrown
		virtual void			HandleException ();
	
	private:
		// The view in which the TMoveInteractor will operate
		TTilesView*				fView;
		// To keep track of the TMoveCommand incremental command and its target,
		// which is the current selection
		TTilesCommandBinding*	fCommandBinding;
		// The location of the orginal mouse down event, used to calculate the
		// move delta.
		TGPoint					fOrigin;
};

#endif // TaligentSample_TILESINTERACTORS