// -*-c++-*- osgWidget - Code by: Jeremy Moles (cubicool) 2007-2008
// $Id: ViewerEventHandlers 31 2008-04-01 19:36:41Z cubicool $

#ifndef OSGWIDGET_VIEWER_EVENT_HANDLERS
#define OSGWIDGET_VIEWER_EVENT_HANDLERS

#include <osgGA/GUIEventAdapter>
#include <osgGA/GUIEventHandler>
#include <osgWidget/WindowManager>

// NOTE! These are all just examples of some default event handlers--they are not
// required. You are more than welcome to provide your own even handlers that
// communicate with a WindowManager using it's public API.

namespace osgWidget {

// This handles the pressing/moving of mouse buttons, etc.
class OSGWIDGET_EXPORT MouseHandler: public osgGA::GUIEventHandler {
	osg::ref_ptr<WindowManager> _wm;

	bool _handleMousePush        (float, float, int);
	bool _handleMouseRelease     (float, float, int);
	bool _handleMouseDoubleClick (float, float, int);
	bool _handleMouseDrag        (float, float, int);
	bool _handleMouseMove        (float, float, int);
	bool _handleMouseScroll      (float, float, int);

	typedef bool (MouseHandler::*MouseAction)(float, float, int);
	typedef bool (WindowManager::*MouseEvent)(float, float);

	MouseAction _isMouseEvent (osgGA::GUIEventAdapter::EventType) const;
	bool        _doMouseEvent (float, float, MouseEvent);

public:
	MouseHandler(WindowManager*);
	
	virtual bool handle(
		const osgGA::GUIEventAdapter&,
		osgGA::GUIActionAdapter&,
		osg::Object*,
		osg::NodeVisitor*
	);
};

// This handles the forwarding of keypress events.
class OSGWIDGET_EXPORT KeyboardHandler: public osgGA::GUIEventHandler {
	osg::ref_ptr<WindowManager> _wm;

public:
	KeyboardHandler(WindowManager*);

	virtual bool handle(
		const osgGA::GUIEventAdapter&,
		osgGA::GUIActionAdapter&,
		osg::Object*,
		osg::NodeVisitor*
	);
};

// This class offers a default kind of handling for resizing.
class OSGWIDGET_EXPORT ResizeHandler: public osgGA::GUIEventHandler {
	osg::ref_ptr<WindowManager> _wm;
	osg::ref_ptr<osg::Camera>   _camera;

public:
	ResizeHandler(WindowManager*, osg::Camera*);

	virtual bool handle(
		const osgGA::GUIEventAdapter&,
		osgGA::GUIActionAdapter&,
		osg::Object*,
		osg::NodeVisitor*
	);
};

}

#endif