#ifndef _OPCAMERAZOOMBOX_H
#define _OPCAMERAZOOMBOX_H

#include "OpConstructRectangle.h"
#include "XJTrackballManipulator.h"

namespace OSGView
{

//interface of the HOpConstruction class
// draws a 2D box in view port based on pointer first position and last position
// Derived classes access the Points for the rectangle in HBaseOperator members
// m_ptFirst and m_ptLast; Points are stored in window space.
class OpCameraZoomBox : public OpConstructRectangle
{
public:
	OpCameraZoomBox();
	OpCameraZoomBox(osgViewer::Viewer* pViewer);
	virtual ~OpCameraZoomBox();

	/*!
		\returns A pointer to a character string denoting the name of the operator which is 'Construct Rectangle'.
	*/
	virtual const char * GetName() {return "OpCameraZoomBox";}  

	/*!
		OnLButtonUp finalizes the size of the rectangle and cleans up.
		\param hevent An GUIEventAdapter object containing information about the current event.
	  \return An #HOperatorReturn indicating the status of the event.
	*/
	virtual int OnLButtonUp(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa); 


	// transfer manipulator to this class
	void  SetManipulator(CXJManipulator* mp) {m_keyswitchManipulator = mp;}

protected:

	//two zoomBox mechanism

	//1ˇ˘Intersection with model
	void ZoomBoxWithModel();

	//2ˇ˘ zoom with scene
	void ZoomBoxWithScene();

protected:
	 CXJManipulator* m_keyswitchManipulator;
};

}   //end namespace



#endif