/**
 *  @class   vetWindowQT
 *
 *  @brief   Class for displaying VETLib frames on a Linux Desktop Env.
 *           Require Trolltech QT library (included in most distribution)
 *           Inherit QWidget, so may be used in any QAplication without limitations.
 *           May be used to display video, sample applications played at 34 fps.
 *
 *  @bug     Currenlty does a single pixel routine.
 *  @warning Require a main QApplication.
 *  @todo
 *  @note    vetWindowQT must be initialized after QApplication.
 *
 *  @see     vetOutput
 *  @example ../../tests/test_vetWindowQT.cpp
 *  @example ../../tests/app_vetLinuxMOVPlayer.cpp
 *  @example ../../tests/app_vetLinuxMPEGPlayer.cpp
 *  @example ../../tests/app_vetVideo4LinuxPlayer.cpp
 *
 *  @version 1.0.2
 *  @date    15/09/2005
 *  @author  Alessandro Polo
 *
 *
 ****************************************************************************
 * VETLib Framework 1.0.2
 *  Copyright (C) Alessandro Polo 2006
 *  http://www.ewgate.net/vetlib
 *
 ****************************************************************************/



#ifndef __VETLIB_VETWINDOWQT_H__
 #define __VETLIB_VETWINDOWQT_H__

 #include "../vetDefs.h"
 #include "../vetOutput.h"

 #include "../vetFrameYUV420.h"
 #include "../vetFrameRGB24.h"
 #include "../vetFrameT.h"


 //Trolltech QT headers
 #include <qapplication.h>
 #include <qpainter.h>
 #include <qwidget.h>

/**
 * @brief  Deafult window's width.
 */
#define VETWQT_DEF_WIDTH	320
/**
 * @brief  Deafult window's height.
 */
#define VETWQT_DEF_HEIGHT	240


class vetWindowQT :		public vetOutput,
 						public QWidget
 {

	protected:

		/**
		 * @brief  QPainter instance, main drawing object.
		 */
		QPainter* dataCanvas;

		/**
		 * @brief  Paint Event callback functions for future extensions.
		 * @param[out] event Event raised.
		 */
		virtual void paintEvent(QPaintEvent* event) { }

	public:


		/**
		 * @brief  Default constructor initializes variables.
		 */
		vetWindowQT();

		/**
		 * @brief  Default constructor initializes variables.
		 *
		 * @param[in] width Window's width in pixels.
		 * @param[in] height Window's height in pixels.
		 */
		vetWindowQT(unsigned int width, unsigned int height);

		/**
		 * @brief  Set current canvas' height.
		 *
		 * @return height in pixel.
		 */
		VETRESULT setHeight(unsigned int value);

		/**
		 * @brief  Set current canvas' width.
		 *
		 * @return width in pixel.
		 */
		VETRESULT setWidth(unsigned int value);


		/**
		 * @brief  Currently not used.
		 * @return VETRET_NOT_IMPLEMENTED
		 */
		VETRESULT run() { return VETRET_NOT_IMPLEMENTED; };


		/**
		 * @brief  Display frame, single pixel routine.
		 *
		 * @param[in] img VETLib Cache Frame to be displayed.
		 *
		 * @return VETRET_OK if everything is fine, VETRET_INTERNAL_ERR else.
		 *
		 * @note   Input operator (<<) call directly this function.
		 * @see    operator << (vetFrameYUV420&)
		 */
		VETRESULT importFrom(vetFrameYUV420& img);

		/**
		 * @brief  Display frame, single pixel routine.
		 *
		 * @param[in] img VETLib Cache24 Frame to be displayed.
		 *
		 * @return VETRET_OK if everything is fine, VETRET_INTERNAL_ERR else.
		 *
		 * @note   Input operator (<<) call directly this function.
		 * @see    operator << (vetFrameRGB24&)
		 */
		VETRESULT importFrom(vetFrameRGB24& img);

		/**
		 * @brief  Display frame, single pixel routine.
		 *
		 * @param[in] img VETLib Grey Frame to be displayed.
		 *
		 * @return VETRET_OK if everything is fine, VETRET_INTERNAL_ERR else.
		 *
		 * @note   Input operator (<<) call directly this function.
		 * @see    operator << (vetFrameT&)
		 */
		VETRESULT importFrom(vetFrameT<unsigned char>& img);


};

#endif //__VETLIB_VETWINDOWQT_H__