opencv/modules/highgui/src/window_QT.cpp

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//               For Open Source Computer Vision Library

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//are permitted provided that the following conditions are met:

//  * Redistribution's of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.

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//  this list of conditions and the following disclaimer in the documentation
//  and/or other materials provided with the distribution.

//  * The name of the copyright holders may not be used to endorse or promote products
//  derived from this software without specific prior written permission.

//This software is provided by the copyright holders and contributors "as is" and
//any express or implied warranties, including, but not limited to, the implied
//warranties of merchantability and fitness for a particular purpose are disclaimed.
//In no event shall the Intel Corporation or contributors be liable for any direct,
//indirect, incidental, special, exemplary, or consequential damages
//(including, but not limited to, procurement of substitute goods or services;
//loss of use, data, or profits; or business interruption) however caused
//and on any theory of liability, whether in contract, strict liability,
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//the use of this software, even if advised of the possibility of such damage.

//--------------------Google Code 2010 -- Yannick Verdie--------------------//


#if defined(HAVE_QT)

#include <window_QT.h>

//Static and global first
static GuiReceiver *guiMainThread = NULL;
static int parameterSystemC = 1;
static char* parameterSystemV[] = {""};
static bool multiThreads = false;
static int last_key = -1;
QWaitCondition key_pressed;
QMutex mutexKey;
static const unsigned int threshold_zoom_img_region = 15;
//the minimum zoom value to start displaying the values in the grid
//that is also the number of pixel per grid

static CvWinProperties* global_control_panel = NULL;
//end static and global



CV_IMPL CvFont cvFontQt(const char* nameFont, int pointSize,CvScalar color,int weight,int style, int spacing)
{

	/*
	//nameFont   <- only Qt
	//CvScalar color   <- only Qt (blue_component, green_component, red\_component[, alpha_component])
	int         font_face;//<- style in Qt
	const int*  ascii;
	const int*  greek;
	const int*  cyrillic;
	float       hscale, vscale;
	float       shear;
	int         thickness;//<- weight in Qt
	float       dx;//spacing letter in Qt (0 default) in pixel
	int         line_type;//<- pointSize in Qt
	*/
	CvFont f = {nameFont,color,style,NULL,NULL,NULL,0,0,0,weight,spacing,pointSize};
	return f;
}



CV_IMPL void cvAddText(const CvArr* img, const char* text, CvPoint org, CvFont* font)
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"putText",
		Qt::AutoConnection,
		Q_ARG(void*, (void*) img),
		Q_ARG(QString,QString(text)),
		Q_ARG(QPoint, QPoint(org.x,org.y)),
		Q_ARG(void*,(void*) font));
}

double cvGetRatioWindow_QT(const char* name)
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	double result = -1;
	QMetaObject::invokeMethod(guiMainThread,
		"getRatioWindow",
		//Qt::DirectConnection,
		Qt::AutoConnection,
		Q_RETURN_ARG(double, result),
		Q_ARG(QString, QString(name)));
	return result;
}

void cvSetRatioWindow_QT(const char* name,double prop_value)
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"setRatioWindow",
		Qt::AutoConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(double, prop_value));
}

double cvGetPropWindow_QT(const char* name)
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	double result = -1;
	QMetaObject::invokeMethod(guiMainThread,
		"getPropWindow",
		//Qt::DirectConnection,
		Qt::AutoConnection,
		Q_RETURN_ARG(double, result),
		Q_ARG(QString, QString(name)));
	return result;
}

void cvSetPropWindow_QT(const char* name,double prop_value)
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"setPropWindow",
		Qt::AutoConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(double, prop_value));
}

void cvSetModeWindow_QT(const char* name, double prop_value)
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"toggleFullScreen",
		Qt::AutoConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(double, prop_value));
}

double cvGetModeWindow_QT(const char* name)
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	double result = -1;

	QMetaObject::invokeMethod(guiMainThread,
		"isFullScreen",
		Qt::AutoConnection,
		Q_RETURN_ARG(double, result),
		Q_ARG(QString, QString(name)));
	return result;
}

CV_IMPL void cvDisplayOverlay(const char* name, const char* text, int delayms)
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"displayInfo",
		Qt::AutoConnection,
		//Qt::DirectConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(QString, QString(text)),
		Q_ARG(int, delayms));

}

CV_IMPL void cvSaveWindowParameters(const char* name)
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"saveWindowParameters",
		Qt::AutoConnection,
		Q_ARG(QString, QString(name)));
}

CV_IMPL void cvLoadWindowParameters(const char* name)
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"loadWindowParameters",
		Qt::AutoConnection,
		Q_ARG(QString, QString(name)));
}

CV_IMPL void cvDisplayStatusBar(const char* name, const char* text, int delayms)
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"displayStatusBar",
		Qt::AutoConnection,
		//Qt::DirectConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(QString, QString(text)),
		Q_ARG(int, delayms));
}


CV_IMPL int cvWaitKey( int arg )
{

	int result = -1;

	if (!guiMainThread)
		return result;

	unsigned long delayms;//in milliseconds
	if (arg<=0)
		delayms = ULONG_MAX;
	else
		delayms = arg;

	if (multiThreads)
	{
		mutexKey.lock();
		if(key_pressed.wait(&mutexKey,delayms))//false if timeout
		{
			result = last_key;
		}
		last_key = -1;
		mutexKey.unlock();

	}else{
		//cannot use wait here because events will not be distributed before processEvents (the main eventLoop is broken)
		//so I create a Thread for the QTimer

		if (arg>0)
			guiMainThread->timer->start(arg);

		//QMutex dummy;

		while(!guiMainThread->_bTimeOut)
		{
			qApp->processEvents(QEventLoop::AllEvents);


			if (!guiMainThread)//when all the windows are deleted
				return result;

			mutexKey.lock();
			if (last_key != -1)
			{
				result = last_key;
				last_key = -1;
				guiMainThread->timer->stop();
				//printf("keypressed\n");
			}
			mutexKey.unlock();

			if (result!=-1)
			{
				break;
			}
			else
			{
				/*
				* //will not work, I broke the event loop !!!!
				dummy.lock();
				QWaitCondition waitCondition;
				waitCondition.wait(&dummy, 2);
				*/

				//to decrease CPU usage
				//sleep 1 millisecond
#if defined WIN32 || defined _WIN32 || defined WIN64 || defined _WIN64
				Sleep(1);
#else
				usleep(1000);
#endif

			}
		}
		guiMainThread->_bTimeOut = false;

	}

	return result;
}

//Yannick Verdie
//This function is experimental and some functions (such as cvSet/getWindowProperty will not work)
//We recommend not using this function for now
CV_IMPL int cvStartLoop(int (*pt2Func)(int argc, char *argv[]), int argc, char* argv[])
{
	multiThreads = true;
	QFuture<int> future = QtConcurrent::run(pt2Func,argc,argv);
	return guiMainThread->start();
}

CV_IMPL void cvStopLoop()
{

	qApp->exit();
}


CvWindow* icvFindWindowByName( const char* arg )
{

	QPointer<CvWindow> window;

	if( !arg )
		CV_Error( CV_StsNullPtr, "NULL name string" );

	QString name(arg);
	CvWindow* w;
	CvWinModel* temp;

	//This is not a very clean way to do the stuff. Indeed, QAction automatically generate toolTil (QLabel)
	//that can be grabbed here and crash the code at 'w->param_name==name'.
	foreach (QWidget *widget, QApplication::topLevelWidgets())
	{

		if (widget->isWindow() && !widget->parentWidget ())//is a window without parent
		{
			temp = (CvWinModel*) widget;
			if (temp->type == type_CvWindow)
			{
			w = (CvWindow*) temp;
			if (name.compare(w->param_name)==0)
			{
				window = w;
				break;
			}
			}
		}
	}
	

	return window;
}


CvBar* icvFindBarbyName(QBoxLayout* layout, QString name_bar, typeBar type)
{
	if (!layout)
		return NULL;

	CvBar* t;

	int stop_index  = layout->layout()->count();

	for (int i = 0; i < stop_index; ++i)
	{
		t = (CvBar*) layout->layout()->itemAt(i);
		if (t->type == type && t->name_bar == name_bar)
			return t;
	}

	return NULL;
}

CvTrackbar* icvFindTrackbarByName( const char* name_trackbar, const char* name_window, QBoxLayout* layout = NULL )
{
	QString nameQt(name_trackbar);
	CvBar* result = NULL;

	if (!name_window && global_control_panel)//window name is null and we have a control panel
		layout = global_control_panel->myLayout;

	if (!layout)
	{
		QPointer<CvWindow> w = icvFindWindowByName( name_window );

		if( !w )
			CV_Error( CV_StsNullPtr, "NULL window handler" );

		if ( w->param_gui_mode == CV_GUI_NORMAL)
			return (CvTrackbar*) icvFindBarbyName( w->myBarLayout, nameQt, type_CvTrackbar);

		if ( w->param_gui_mode == CV_GUI_EXPANDED)
		{
			result = icvFindBarbyName( w->myBarLayout, nameQt, type_CvTrackbar);

			if (result)
				return (CvTrackbar*) result;

			return (CvTrackbar*) icvFindBarbyName(global_control_panel->myLayout, nameQt, type_CvTrackbar);
		}

		return NULL;
	}else
		//layout was specified
	{
		return (CvTrackbar*) icvFindBarbyName( layout, nameQt, type_CvTrackbar);
	}
}

CvButtonbar* icvFindButtonbarByName( const char* button_name,QBoxLayout* layout)
{
	QString nameQt(button_name);
	return (CvButtonbar*) icvFindBarbyName( layout, nameQt, type_CvButtonbar);
}

int icvInitSystem(int *c, char** v)
{
	static int wasInitialized = 0;

	// check initialization status
	if( !wasInitialized)
	{
		new QApplication(*c,v);

		wasInitialized = 1;
		qDebug()<<"init done";

#if defined( HAVE_QT_OPENGL )
		qDebug()<<"opengl support available";
#endif
	}

	return 0;
}

CV_IMPL int cvInitSystem( int, char** )
{
	icvInitSystem(&parameterSystemC, parameterSystemV);
	return 0;
}


CV_IMPL int cvNamedWindow( const char* name, int flags )
{

	if (!guiMainThread)
		guiMainThread = new GuiReceiver;

	if (multiThreads)
		QMetaObject::invokeMethod(guiMainThread,
		"createWindow",
		Qt::BlockingQueuedConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(int, flags));
	else
		guiMainThread->createWindow(QString(name),flags);

	return 1;//Dummy value
}

CV_IMPL void cvDestroyWindow( const char* name )
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"destroyWindow",
		//Qt::BlockingQueuedConnection,
		Qt::AutoConnection,
		Q_ARG(QString, QString(name))
		);
}



CV_IMPL void cvDestroyAllWindows(void)
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"destroyAllWindow",
		//Qt::BlockingQueuedConnection,
		Qt::AutoConnection
		);
}

CV_IMPL void* cvGetWindowHandle( const char* name )
{
	if( !name )
		CV_Error( CV_StsNullPtr, "NULL name string" );

	return (void*) icvFindWindowByName( name );
}

CV_IMPL const char* cvGetWindowName( void* window_handle )
{

	if( !window_handle )
		CV_Error( CV_StsNullPtr, "NULL window handler" );

	return ((CvWindow*)window_handle)->windowTitle().toLatin1().data();
}

CV_IMPL void cvMoveWindow( const char* name, int x, int y )
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"moveWindow",
		//Qt::BlockingQueuedConnection,
		Qt::AutoConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(int, x),
		Q_ARG(int, y)
		);

}

CV_IMPL void cvResizeWindow(const char* name, int width, int height )
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"resizeWindow",
		//Qt::BlockingQueuedConnection,
		Qt::AutoConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(int, width),
		Q_ARG(int, height)
		);

}

CV_IMPL int cvCreateTrackbar2( const char* name_bar, const char* window_name, int* val, int count, CvTrackbarCallback2 on_notify, void* userdata )
{
	if (!guiMainThread) 
 		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" ); 

 	QMetaObject::invokeMethod(guiMainThread, 
 								"addSlider2", 
 								Qt::AutoConnection, 
 								Q_ARG(QString, QString(name_bar)), 
 								Q_ARG(QString, QString(window_name)), 
 								Q_ARG(void*, (void*)val), 
 								Q_ARG(int, count), 
 								Q_ARG(void*, (void*)on_notify), 
 								Q_ARG(void*, (void*)userdata) 
 	); 

 	return 1;//dummy value 
}

CV_IMPL int cvStartWindowThread()
{
	return 0;
}

CV_IMPL int cvCreateTrackbar( const char* name_bar, const char* window_name, int* value, int count, CvTrackbarCallback on_change)
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"addSlider",
		Qt::AutoConnection,
		Q_ARG(QString, QString(name_bar)),
		Q_ARG(QString, QString(window_name)),
		Q_ARG(void*, (void*)value),
		Q_ARG(int, count),
		Q_ARG(void*, (void*)on_change)
		);

	return 1;//dummy value
}



CV_IMPL int cvCreateButton(const char* button_name,CvButtonCallback on_change, void* userdata , int button_type, int initial_button_state )
{

	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	if (initial_button_state < 0 || initial_button_state > 1)
		return 0;

	QMetaObject::invokeMethod(guiMainThread,
		"addButton",
		Qt::AutoConnection,
		Q_ARG(QString, QString(button_name)),
		Q_ARG(int,  button_type),
		Q_ARG(int, initial_button_state),
		Q_ARG(void*, (void*)on_change),
		Q_ARG(void*, userdata)
		);

	return 1;//dummy value
}

CV_IMPL void cvCreateOpenGLCallback( const char* window_name, CvOpenGLCallback callbackOpenGL, void* userdata, double angle, double zmin, double zmax)
{
	if (!guiMainThread)
		CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

	QMetaObject::invokeMethod(guiMainThread,
		"setOpenGLCallback",
		Qt::AutoConnection,
		Q_ARG(QString, QString(window_name)),
		Q_ARG(void*, (void*)callbackOpenGL),
		Q_ARG(void*, userdata),
		Q_ARG(double, angle),
		Q_ARG(double, zmin),
		Q_ARG(double, zmax)
		);
}

CV_IMPL int cvGetTrackbarPos( const char* name_bar, const char* window_name )
{
	int result = -1;

	QPointer<CvTrackbar> t = icvFindTrackbarByName(  name_bar, window_name );

	if (t)
		result = t->slider->value();

	return result;
}

CV_IMPL void cvSetTrackbarPos( const char* name_bar, const char* window_name, int pos )
{

	QPointer<CvTrackbar> t = icvFindTrackbarByName(  name_bar, window_name );

	if (t)
		t->slider->setValue(pos);

}

/* assign callback for mouse events */
CV_IMPL void cvSetMouseCallback( const char* window_name, CvMouseCallback on_mouse,void* param )
{
	QPointer<CvWindow> w = icvFindWindowByName( window_name );

	if (!w)
		CV_Error(CV_StsNullPtr, "NULL window handler" );

	w->setMouseCallBack(on_mouse, param);

}

CV_IMPL void cvShowImage( const char* name, const CvArr* arr )
{

	if (!guiMainThread)
		guiMainThread = new GuiReceiver;

	QMetaObject::invokeMethod(guiMainThread,
		"showImage",
		//Qt::BlockingQueuedConnection,
		Qt::DirectConnection,
		Q_ARG(QString, QString(name)),
		Q_ARG(void*, (void*)arr)
		);
}


//----------OBJECT----------------

GuiReceiver::GuiReceiver() : _bTimeOut(false), nb_windows(0)
{
	icvInitSystem(&parameterSystemC, parameterSystemV);

	timer = new QTimer;
	QObject::connect(timer, SIGNAL(timeout()), this, SLOT(timeOut()));
	timer->setSingleShot(true);
}


void GuiReceiver::isLastWindow()
{
	if (--nb_windows <= 0)
	{
		delete guiMainThread;//delete global_control_panel too
		guiMainThread = NULL;
		qApp->quit();
	}
}

GuiReceiver::~GuiReceiver()
{
	
	if (global_control_panel)
	{
		delete global_control_panel;
		global_control_panel = NULL;
	}

	delete timer;
}

void GuiReceiver::putText(void* arg1, QString text, QPoint org, void* arg2)
{
	CV_Assert(arg1)

		IplImage* img = (IplImage*)arg1;

	//for now, only support QImage::Format_RGB888
	if (img->depth !=IPL_DEPTH_8U || img->nChannels != 3)
		return;

	CvFont* font = (CvFont*)arg2;



	QImage qimg((uchar*) img->imageData, img->width, img->height,QImage::Format_RGB888);
	QPainter qp(&qimg);
	if (font)
	{
		QFont f(font->nameFont, font->line_type/*PointSize*/, font->thickness/*weight*/);
		f.setStyle((QFont::Style)font->font_face/*style*/);
		f.setLetterSpacing ( QFont::AbsoluteSpacing, font->dx/*spacing*/ );
		//cvScalar(blue_component, green_component, red\_component[, alpha_component])
		//Qt map non-transparent to 0xFF and transparent to 0
		//OpenCV scalar is the reverse, so 255-font->color.val[3]
		qp.setPen(QColor(font->color.val[2],font->color.val[1],font->color.val[0],255-font->color.val[3]));
		qp.setFont ( f );
	}
	qp.drawText (org, text );
	qp.end();
}

void GuiReceiver::saveWindowParameters(QString name)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (w)
		w->writeSettings();
}

void GuiReceiver::loadWindowParameters(QString name)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (w)
		w->readSettings();
}

double GuiReceiver::getRatioWindow(QString name)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );


	if (!w)
		return -1;

	return (double)w->getView()->getRatio();
}

void GuiReceiver::setRatioWindow(QString name, double arg2 )
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (!w)
		return;

	int flags = (int) arg2;

	if (w->getView()->getRatio() == flags)//nothing to do
		return;

	//if valid flags
	if (flags == CV_WINDOW_FREERATIO || flags == CV_WINDOW_KEEPRATIO)
		w->getView()->setRatio(flags);

}

double GuiReceiver::getPropWindow(QString name)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );


	if (!w)
		return -1;

	return (double)w->param_flags;
}

void GuiReceiver::setPropWindow(QString name, double arg2 )
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (!w)
		return;

	int flags = (int) arg2;

	if (w->param_flags == flags)//nothing to do
		return;


	switch(flags)
	{
	case  CV_WINDOW_NORMAL:
		w->myGlobalLayout->setSizeConstraint(QLayout::SetMinAndMaxSize);
		w->param_flags = flags;

		break;
	case  CV_WINDOW_AUTOSIZE:
		w->myGlobalLayout->setSizeConstraint(QLayout::SetFixedSize);
		w->param_flags = flags;

		break;
	default:;
	}
}

double GuiReceiver::isFullScreen(QString name)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (!w)
		return -1;

	if (w->isFullScreen())
		return CV_WINDOW_FULLSCREEN;
	else
		return CV_WINDOW_NORMAL;
}

//accept CV_WINDOW_NORMAL or CV_WINDOW_FULLSCREEN
void GuiReceiver::toggleFullScreen(QString name, double flags )
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (!w)
		return;

	if (w->isFullScreen() && flags == CV_WINDOW_NORMAL)
	{
		w->showTools();
		w->showNormal();
		return;
	}

	if (!w->isFullScreen() && flags == CV_WINDOW_FULLSCREEN)
	{
		w->hideTools();
		w->showFullScreen();
		return;
	}

}

void GuiReceiver::createWindow( QString name, int flags )
{
	if (!qApp)
		CV_Error(CV_StsNullPtr, "NULL session handler" );

	// Check the name in the storage
	if( icvFindWindowByName( name.toLatin1().data() ))
	{
		return;
	}

	//QPointer<CvWindow> w1 =
	nb_windows++;
	new CvWindow(name, flags);
}

void GuiReceiver::timeOut()
{
	_bTimeOut = true;
}

void GuiReceiver::displayInfo( QString name, QString text, int delayms )
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (w && delayms > 0)
		w->displayInfo(text,delayms);
}

void GuiReceiver::displayStatusBar( QString name, QString text, int delayms )
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (w && delayms > 0)
		if (w->myStatusBar)//if statusbar was created
			w->displayStatusBar(text,delayms);
}

void GuiReceiver::showImage(QString name, void* arr)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (!w)//as observed in the previous implementation (W32, GTK or Carbon), create a new window is the pointer returned is null
	{
		cvNamedWindow( name.toLatin1().data() );
		w = icvFindWindowByName( name.toLatin1().data() );
	}

	if( w && arr )
	{
		w->updateImage(arr);

		if (w->isHidden())
			w->show();
	}
	else
	{
		CV_Error(CV_StsNullPtr, "Do nothing (Window or Image NULL)");
	}
}

void GuiReceiver::destroyWindow(QString name)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (w)
	{
		w->close();
		//in not-multiThreads mode, looks like the window is hidden but not deleted
		//so I do it manually
		//otherwise QApplication do it for me if the exec command was executed (in multiThread mode)
		if (!multiThreads)
			delete w;
	}
}

void GuiReceiver::destroyAllWindow()
{
	if (!qApp)
		CV_Error(CV_StsNullPtr, "NULL session handler" );

	if (multiThreads)
	{
		qApp->closeAllWindows();
	}else{

		foreach (QObject *obj, QApplication::topLevelWidgets())
		{
			if (obj->metaObject ()->className () == "CvWindow")
			{
				delete obj;
			}
		}

	}

}

void GuiReceiver::setOpenGLCallback(QString window_name, void* callbackOpenGL, void* userdata,  double angle, double zmin, double zmax)
{
	QPointer<CvWindow> w = icvFindWindowByName( window_name.toLatin1().data() );

	if (w && callbackOpenGL)
		w->setOpenGLCallback((CvOpenGLCallback) callbackOpenGL, userdata,angle,zmin,zmax);
}

void GuiReceiver::moveWindow(QString name, int x, int y)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (w)
		w->move(x,y);

}

void GuiReceiver::resizeWindow(QString name, int width, int height)
{
	QPointer<CvWindow> w = icvFindWindowByName( name.toLatin1().data() );

	if (w)
		w->resize(width, height);
}

void GuiReceiver::enablePropertiesButtonEachWindow()
{
	CvWindow* w;
	CvWinModel* temp;

	//For each window, enable window property button
	foreach (QWidget *widget, QApplication::topLevelWidgets())
	{

		if (widget->isWindow() && !widget->parentWidget ())//is a window without parent
		{
			temp = (CvWinModel*) widget;
			if (temp->type == type_CvWindow)
			{
				w = (CvWindow*) widget;
				//active window properties button
				w->vect_QActions[9]->setDisabled(false);
			}
		}
	}
}

void GuiReceiver::addButton(QString button_name, int button_type, int initial_button_state , void* on_change, void* userdata)
{

	if (!global_control_panel)
		return;
	QPointer<CvButtonbar> b;// = icvFindButtonbarByName(  button_name.toLatin1().data(), global_control_panel->myLayout );

	//if (b)//button with this name already exist
	//    return;


	if (global_control_panel->myLayout->count() == 0)//if that is the first button attach to the control panel, create a new button bar
	{

		b = CvWindow::createButtonbar(button_name);//the bar has the name of the first button attached to it
		enablePropertiesButtonEachWindow();

	}else{
		CvBar* lastbar = (CvBar*) global_control_panel->myLayout->itemAt(global_control_panel->myLayout->count()-1);

		if (lastbar->type == type_CvTrackbar)//if last bar is a trackbar, create a new buttonbar, else, attach to the current bar
			b = CvWindow::createButtonbar(button_name);//the bar has the name of the first button attached to it
		else
			b = (CvButtonbar*) lastbar;

	}

	b->addButton( button_name,(CvButtonCallback) on_change, userdata, button_type, initial_button_state);
}

void GuiReceiver::addSlider2(QString bar_name, QString window_name, void* value, int count, void* on_change, void *userdata)
{
	QBoxLayout *layout = NULL;
	QPointer<CvWindow> w;
	if (window_name != "")
	{
		w = icvFindWindowByName( window_name.toLatin1().data()  );

		if (!w)
			return;
	}else{
		if (global_control_panel)
			layout = global_control_panel->myLayout;
	}

	QPointer<CvTrackbar> t = icvFindTrackbarByName( bar_name.toLatin1().data() , window_name.toLatin1().data(), layout );

	if (t)//trackbar exists
		return;

	if (!value)
		CV_Error(CV_StsNullPtr, "NULL value pointer" );

	if (count<= 0)//count is the max value of the slider, so must be bigger than 0
		CV_Error(CV_StsNullPtr, "Max value of the slider must be bigger than 0" );

	CvWindow::addSlider2(w,bar_name,(int*)value,count,(CvTrackbarCallback2) on_change, userdata);
}

void GuiReceiver::addSlider(QString bar_name, QString window_name, void* value, int count, void* on_change)
{
	QBoxLayout *layout = NULL;
	QPointer<CvWindow> w;
	if (window_name != "")
	{
		w = icvFindWindowByName( window_name.toLatin1().data()  );

		if (!w)
			return;
	}else{
		if (global_control_panel)
			layout = global_control_panel->myLayout;
	}

	QPointer<CvTrackbar> t = icvFindTrackbarByName( bar_name.toLatin1().data() , window_name.toLatin1().data(), layout );

	if (t)//trackbar exists
		return;

	if (!value)
		CV_Error(CV_StsNullPtr, "NULL value pointer" );

	if (count<= 0)//count is the max value of the slider, so must be bigger than 0
		CV_Error(CV_StsNullPtr, "Max value of the slider must be bigger than 0" );

	CvWindow::addSlider(w,bar_name,(int*)value,count,(CvTrackbarCallback) on_change);
}

int GuiReceiver::start()
{
	return qApp->exec();
}

CvTrackbar::CvTrackbar(CvWindow* arg, QString name, int* value, int count, CvTrackbarCallback2 on_change, void* data )
{
	callback = NULL;
	callback2 = on_change;
	userdata = data;

	construc_trackbar(arg,name, value, count);
}

CvTrackbar::CvTrackbar(CvWindow* arg, QString name, int* value, int count, CvTrackbarCallback on_change )
{
	callback = on_change;
	callback2 = NULL;
	userdata = NULL;

	construc_trackbar(arg,name, value, count);
}

void CvTrackbar::construc_trackbar(CvWindow* arg, QString name, int* value, int count)
{
	type=type_CvTrackbar;
	myparent = arg;
	name_bar = name;
	setObjectName(name_bar);
	dataSlider = value;

	slider = new QSlider(Qt::Horizontal);
	slider->setFocusPolicy(Qt::StrongFocus);
	slider->setMinimum(0);
	slider->setMaximum(count);
	slider->setPageStep(5);
	slider->setValue(*value);
	slider->setTickPosition(QSlider::TicksBelow);


	//Change style of the Slider
	//slider->setStyleSheet(str_Trackbar_css);

	QFile qss(":/stylesheet-trackbar");
	if (qss.open(QFile::ReadOnly))
	{
		slider->setStyleSheet(QLatin1String(qss.readAll()));
		qss.close();
	}


	//this next line does not work if we change the style with a stylesheet, why ? (bug in QT ?)
	//slider->setTickPosition(QSlider::TicksBelow);
	label = new QPushButton;
	label->setFlat(true);
	setLabel(slider->value());


	QObject::connect( slider, SIGNAL( valueChanged( int ) ),this, SLOT( update( int ) ) );

	QObject::connect( label, SIGNAL( clicked() ),this, SLOT( createDialog() ));

	//label->setStyleSheet("QPushButton:disabled {color: black}");

	addWidget(label,Qt::AlignLeft);//name + value
	addWidget(slider,Qt::AlignCenter);//slider
}

void CvTrackbar::createDialog()
{

	bool ok= false;

	//crash if I access the values directly and give them to QInputDialog, so do a copy first.
	int value = slider->value();
	int step = slider->singleStep();
	int min = slider->minimum();
	int max = slider->maximum();

	int i =
#if QT_VERSION >= 0x040500
		QInputDialog::getInt
#else
		QInputDialog::getInteger
#endif
		(this->parentWidget(),
		tr("Slider %1").arg(name_bar),
		tr("New value:"),
		value,
		min,
		max,
		step,
		&ok);

	if (ok)
		slider->setValue(i);

}

void CvTrackbar::update(int myvalue)
{
	setLabel(myvalue);

	*dataSlider = myvalue;
	if (callback)
	{
		callback(myvalue);
		return;
	}

	if (callback2)
	{
		callback2(myvalue,userdata);
		return;
	}
}

void CvTrackbar::setLabel(int myvalue)
{
	QString nameNormalized = name_bar.leftJustified( 10, ' ', true );
	QString valueMaximum = QString("%1").arg(slider->maximum());
	QString str = QString("%1 (%2/%3)").arg(nameNormalized).arg(myvalue,valueMaximum.length(),10,QChar('0')).arg(valueMaximum);
	label->setText(str);
}

CvTrackbar::~CvTrackbar()
{
	delete slider;
	delete label;
}




//here CvButtonbar class
CvButtonbar::CvButtonbar(QWidget* arg,  QString arg2)
{
	type=type_CvButtonbar;
	myparent = arg;
	name_bar = arg2;
	setObjectName(name_bar);

	group_button = new QButtonGroup;

	/*
	label = new QLabel;
	setLabel();
	addWidget(label,Qt::AlignLeft );
	*/
}

CvButtonbar::~CvButtonbar()
{
	QLayoutItem *child;

	while ((child = takeAt(0)) != 0)
		delete child;

	delete group_button;
}

void CvButtonbar::setLabel()
{
	QString nameNormalized = name_bar.leftJustified( 10, ' ', true );
	label->setText(nameNormalized);
}

void CvButtonbar::addButton( QString name, CvButtonCallback call, void* userdata,  int button_type, int initial_button_state)
{
	QString button_name = name;

	if (button_name == "")
		button_name = tr("button %1").arg(this->count());

	QPointer<QAbstractButton> button;

	if (button_type == CV_PUSH_BUTTON)
		button = (QAbstractButton*) new CvPushButton(this, button_name,call, userdata);

	if (button_type == CV_CHECKBOX)
		button = (QAbstractButton*) new CvCheckBox(this, button_name,call, userdata, initial_button_state);

	if (button_type == CV_RADIOBOX)
	{
		button = (QAbstractButton*) new CvRadioButton(this, button_name,call, userdata, initial_button_state);
		group_button->addButton(button);
	}

	if (button)
	{
		QObject::connect( button, SIGNAL( toggled(bool) ),button, SLOT( callCallBack(bool) ));
		addWidget(button,Qt::AlignCenter);
	}
}





//buttons here
CvPushButton::CvPushButton(CvButtonbar* arg1, QString arg2, CvButtonCallback arg3, void* arg4)
{
	myparent = arg1;
	button_name = arg2;
	callback = arg3;
	userdata=arg4;

	setObjectName(button_name);
	setText(button_name);

	if (isChecked())
		callCallBack(true);
}

void CvPushButton::callCallBack(bool checked)
{
	if (callback)
		callback(checked,userdata);
}

CvCheckBox::CvCheckBox(CvButtonbar* arg1, QString arg2, CvButtonCallback arg3, void* arg4, int initial_button_state)
{
	myparent = arg1;
	button_name = arg2;
	callback = arg3;
	userdata=arg4;

	setObjectName(button_name);
	setCheckState((initial_button_state == 1?Qt::Checked:Qt::Unchecked));
	setText(button_name);

	if (isChecked())
		callCallBack(true);
}

void CvCheckBox::callCallBack(bool checked)
{
	if (callback)
		callback(checked,userdata);
}

CvRadioButton::CvRadioButton(CvButtonbar* arg1, QString arg2, CvButtonCallback arg3, void* arg4, int initial_button_state)
{
	myparent = arg1;
	button_name = arg2;
	callback = arg3;
	userdata=arg4;

	setObjectName(button_name);
	setChecked(initial_button_state);
	setText(button_name);

	if (isChecked())
		callCallBack(true);
}

void CvRadioButton::callCallBack(bool checked)
{
	if (callback)
		callback(checked,userdata);
}




//here CvWinProperties class
CvWinProperties::CvWinProperties(QString name_paraWindow, QObject* parent)
{
	//setParent(parent);
	type = type_CvWinProperties;
	setWindowFlags(Qt::Tool);
	setContentsMargins(0,0,0,0);
	setWindowTitle(name_paraWindow);
	setObjectName(name_paraWindow);
	resize(100,50);

	myLayout = new QBoxLayout(QBoxLayout::TopToBottom);
	myLayout->setObjectName(QString::fromUtf8("boxLayout"));
	myLayout->setContentsMargins(0, 0, 0, 0);
	myLayout->setSpacing(0);
	myLayout->setMargin(0);
	myLayout->setSizeConstraint(QLayout::SetFixedSize);
	setLayout(myLayout);

	hide();
}

void CvWinProperties::closeEvent ( QCloseEvent * e )
{
	e->accept();//intersept the close event (not sure I really need it)
	//an hide event is also sent. I will intercept it and do some processing
}

void CvWinProperties::showEvent ( QShowEvent * event )
{
	//why -1,-1 ?: do this trick because the first time the code is run,
	//no value pos was saved so we let Qt move the window in the middle of its parent (event ignored).
	//then hide will save the last position and thus, we want to retreive it (event accepted).
	QPoint mypos(-1,-1);
	QSettings settings("OpenCV2", this->windowTitle());
	mypos = settings.value("pos", mypos).toPoint();

	if (mypos.x()>=0)
	{
		move(mypos);
		event->accept();
	}
	else{
		event->ignore();
	}
}

void CvWinProperties::hideEvent ( QHideEvent * event )
{
	QSettings settings("OpenCV2", this->windowTitle());
	settings.setValue("pos", pos());//there is an offset of 6 pixels (so the window's position is wrong -- why ?)
	event->accept();
}

CvWinProperties::~CvWinProperties()
{
	//clear the setting pos
	QSettings settings("OpenCV2", this->windowTitle());
	settings.remove("pos");

	QLayoutItem *child;
	if (myLayout)
	{
		while ((child = myLayout->takeAt(0)) != 0)
			delete child;

		delete myLayout;
	}
}






//Here CvWindow class
CvWindow::CvWindow(QString arg, int arg2)
{
	type = type_CvWindow;
	moveToThread(qApp->instance()->thread());
	param_name = arg;

	param_flags = arg2 & 0x0000000F;
	param_gui_mode = arg2 & 0x000000F0;
	param_ratio_mode =  arg2 & 0x00000F00;

	//setAttribute(Qt::WA_DeleteOnClose);//in other case, does not release memory
	setContentsMargins(0,0,0,0);
	setWindowTitle(param_name);
	setObjectName(param_name);

	resize(400,300);

	//1: create control panel
	if (!global_control_panel)
		global_control_panel = createParameterWindow();

	//2: Layouts
	createBarLayout();
	createGlobalLayout();

	//3: my view
	int mode_display = CV_MODE_NORMAL;
#if defined( HAVE_QT_OPENGL )
	mode_display = CV_MODE_OPENGL;
#endif
	createView(mode_display, param_ratio_mode);

	//4: shortcuts and actions
	createActions();
	createShortcuts();
	//createActionsandShortcuts();

	//5: toolBar and statusbar
	if (param_gui_mode == CV_GUI_EXPANDED)
	{
		createToolBar();
		createStatusBar();
	}


	//Now attach everything
	if (myToolBar)
		myGlobalLayout->addWidget(myToolBar,Qt::AlignCenter);

	myGlobalLayout->addWidget(myview,Qt::AlignCenter);

	myGlobalLayout->addLayout(myBarLayout,Qt::AlignCenter);

	if (myStatusBar)
		myGlobalLayout->addWidget(myStatusBar,Qt::AlignCenter);

	setLayout(myGlobalLayout);
	show();

}

CvWindow::~CvWindow()
{

	QLayoutItem *child;

	if (myGlobalLayout)
	{
		while ((child = myGlobalLayout->takeAt(0)) != 0)
			delete child;

		delete myGlobalLayout;
	}

	if (myBarLayout)
	{
		while ((child = myBarLayout->takeAt(0)) != 0)
			delete child;

		delete myBarLayout;
	}

	if (myStatusBar)
	{
		delete myStatusBar;
		delete myStatusBar_msg;
	}

	if (myToolBar)
	{
		for (int i=0;i<vect_QActions.count();i++)
			delete vect_QActions[i];

		delete myToolBar;
	}

	for (int i=0;i<vect_QShortcuts.count();i++)
		delete vect_QShortcuts[i];

	if (guiMainThread)
		guiMainThread->isLastWindow();
}



CvButtonbar* CvWindow::createButtonbar(QString name_bar)
{
	QPointer<CvButtonbar> t = new CvButtonbar(global_control_panel,name_bar);
	t->setAlignment(Qt::AlignHCenter);

	QPointer<QBoxLayout> myLayout = global_control_panel->myLayout;

	myLayout->insertLayout(myLayout->count(),t);

	return t;
}


void CvWindow::hideTools()
{
	if (myToolBar)
		myToolBar->hide();

	if (myStatusBar)
		myStatusBar->hide();

	if (global_control_panel)
		global_control_panel->hide();
}

void CvWindow::showTools()
{
	if (myToolBar)
		myToolBar->show();

	if (myStatusBar)
		myStatusBar->show();

}

CvWinProperties* CvWindow::createParameterWindow()
{
	QString name_paraWindow =QFileInfo(QApplication::applicationFilePath()).fileName()+" settings";

	CvWinProperties *result =  new CvWinProperties(name_paraWindow,guiMainThread);
	return result;
}

void CvWindow::displayPropertiesWin()
{
	if (global_control_panel->isHidden())
		global_control_panel->show();
	else
		global_control_panel->hide();
}

void CvWindow::createActions()
{
	vect_QActions.resize(10);

	//if the shortcuts are changed in window_QT.h, we need to update the tooltip manually
	vect_QActions[0] = new QAction(QIcon(":/left-icon"),"Panning left (CTRL+arrowLEFT)",this);
	vect_QActions[0]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[0],SIGNAL(triggered()),myview, SLOT( siftWindowOnLeft() ));

	vect_QActions[1] = new QAction(QIcon(":/right-icon"),"Panning right (CTRL+arrowRIGHT)",this);
	vect_QActions[1]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[1],SIGNAL(triggered()),myview, SLOT( siftWindowOnRight() ));

	vect_QActions[2] = new QAction(QIcon(":/up-icon"),"Panning up (CTRL+arrowUP)",this);
	vect_QActions[2]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[2],SIGNAL(triggered()),myview, SLOT( siftWindowOnUp() ));

	vect_QActions[3] = new QAction(QIcon(":/down-icon"),"Panning down (CTRL+arrowDOWN)",this);
	vect_QActions[3]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[3],SIGNAL(triggered()),myview, SLOT( siftWindowOnDown() ));

	vect_QActions[4] = new QAction(QIcon(":/zoom_x1-icon"),"Zoom x1 (CTRL+P)",this);
	vect_QActions[4]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[4],SIGNAL(triggered()),myview, SLOT( resetZoom() ));

	vect_QActions[5] = new QAction(QIcon(":/imgRegion-icon"),tr("Zoom x%1 (see label) (CTRL+X)")
		.arg(threshold_zoom_img_region)
		,this);
	vect_QActions[5]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[5],SIGNAL(triggered()),myview, SLOT( imgRegion() ));

	vect_QActions[6] = new QAction(QIcon(":/zoom_in-icon"),tr("Zoom in (CTRL++)"),this);
	vect_QActions[6]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[6],SIGNAL(triggered()),myview, SLOT( ZoomIn() ));

	vect_QActions[7] = new QAction(QIcon(":/zoom_out-icon"),tr("Zoom out (CTRL+-)"),this);
	vect_QActions[7]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[7],SIGNAL(triggered()),myview, SLOT( ZoomOut() ));

	vect_QActions[8] = new QAction(QIcon(":/save-icon"),tr("Save current image (CTRL+S)"),this);
	vect_QActions[8]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[8],SIGNAL(triggered()),myview, SLOT( saveView() ));

	vect_QActions[9] = new QAction(QIcon(":/properties-icon"),tr("Display properties window (CTRL+P)"),this);
	vect_QActions[9]->setIconVisibleInMenu(true);
	QObject::connect( vect_QActions[9],SIGNAL(triggered()),this, SLOT( displayPropertiesWin() ));

	if (global_control_panel->myLayout->count() == 0)
		vect_QActions[9]->setDisabled(true);
}


void CvWindow::createShortcuts()
{
	vect_QShortcuts.resize(10);

	vect_QShortcuts[0] = new QShortcut(shortcut_panning_left, this);
	QObject::connect( vect_QShortcuts[0], SIGNAL( activated ()),myview, SLOT( siftWindowOnLeft() ));
	vect_QShortcuts[1] = new QShortcut(shortcut_panning_right, this);
	QObject::connect( vect_QShortcuts[1], SIGNAL( activated ()),myview, SLOT( siftWindowOnRight() ));
	vect_QShortcuts[2] = new QShortcut(shortcut_panning_up, this);
	QObject::connect(vect_QShortcuts[2], SIGNAL( activated ()),myview, SLOT( siftWindowOnUp() ));
	vect_QShortcuts[3] = new QShortcut(shortcut_panning_down, this);
	QObject::connect(vect_QShortcuts[3], SIGNAL( activated ()),myview, SLOT( siftWindowOnDown() ));

	vect_QShortcuts[4] = new QShortcut(shortcut_zoom_normal, this);
	QObject::connect( vect_QShortcuts[4], SIGNAL( activated ()),myview, SLOT( resetZoom( ) ));
	vect_QShortcuts[5] = new QShortcut(shortcut_zoom_imgRegion, this);
	QObject::connect( vect_QShortcuts[5], SIGNAL( activated ()),myview, SLOT( imgRegion( ) ));
	vect_QShortcuts[6] = new QShortcut(shortcut_zoom_in, this);
	QObject::connect( vect_QShortcuts[6], SIGNAL( activated ()),myview, SLOT( ZoomIn() ));
	vect_QShortcuts[7] = new QShortcut(shortcut_zoom_out, this);
	QObject::connect(vect_QShortcuts[7], SIGNAL( activated ()),myview, SLOT( ZoomOut() ));
	vect_QShortcuts[8] = new QShortcut(shortcut_save_img, this);
	QObject::connect( vect_QShortcuts[8], SIGNAL( activated ()),myview, SLOT( saveView( ) ));
	vect_QShortcuts[9] = new QShortcut(shortcut_properties_win, this);
	QObject::connect( vect_QShortcuts[9], SIGNAL( activated ()),this, SLOT( displayPropertiesWin() ));
}

void CvWindow::createToolBar()
{
	myToolBar = new QToolBar(this);
	myToolBar->blockSignals(true);
	//myToolBar->setFloatable(false);//is not a window
	myToolBar->setMaximumHeight(28);

	foreach (QAction *a, vect_QActions)
		myToolBar->addAction(a);
}

void CvWindow::createStatusBar()
{
	myStatusBar = new QStatusBar(this);
	myStatusBar->setSizeGripEnabled(false);
	myStatusBar->setMaximumHeight(20);
	myStatusBar_msg = new QLabel;
	myStatusBar_msg->setFrameStyle(QFrame::Raised);
	myStatusBar_msg->setAlignment(Qt::AlignHCenter);
	myStatusBar->addWidget(myStatusBar_msg);
}

void CvWindow::createGlobalLayout()
{
	myGlobalLayout = new QBoxLayout(QBoxLayout::TopToBottom);
	myGlobalLayout->setObjectName(QString::fromUtf8("boxLayout"));
	myGlobalLayout->setContentsMargins(0, 0, 0, 0);
	myGlobalLayout->setSpacing(0);
	myGlobalLayout->setMargin(0);

	if (param_flags == CV_WINDOW_AUTOSIZE)
		myGlobalLayout->setSizeConstraint(QLayout::SetFixedSize);

	if (param_flags == CV_WINDOW_NORMAL)
		myGlobalLayout->setSizeConstraint(QLayout::SetMinAndMaxSize);
}

void CvWindow::createBarLayout()
{
	myBarLayout = new QBoxLayout(QBoxLayout::TopToBottom);
	myBarLayout->setObjectName(QString::fromUtf8("barLayout"));
	myBarLayout->setContentsMargins(0, 0, 0, 0);
	myBarLayout->setSpacing(0);
	myBarLayout->setMargin(0);
}


void CvWindow::createView(int mode, int ratio)
{
	//mode = CV_MODE_NORMAL or CV_MODE_OPENGL
	//ratio = CV_WINDOW_KEEPRATIO or CV_WINDOW_FREERATIO
	myview = new ViewPort(this, mode,ratio);//parent, mode_display, keep_aspect_ratio
	myview->setAlignment(Qt::AlignHCenter);
}

void CvWindow::setOpenGLCallback(CvOpenGLCallback func,void* userdata, double angle, double zmin, double zmax)
{
	myview->setOpenGLCallback(func,userdata, angle, zmin, zmax );
}

ViewPort* CvWindow::getView()
{
	return myview;
}

void CvWindow::displayInfo(QString text,int delayms)
{
	myview->startDisplayInfo(text, delayms);
}

void CvWindow::displayStatusBar(QString text,int delayms)
{
	myStatusBar->showMessage(text,delayms);
}

void CvWindow::updateImage(void* arr)
{
	myview->updateImage(arr);
}

void CvWindow::setMouseCallBack(CvMouseCallback m, void* param)
{
	myview->setMouseCallBack(m,param);
}

//addSlider2 is static
void CvWindow::addSlider2(CvWindow* w,QString name, int* value, int count,CvTrackbarCallback2 on_change, void* userdata)
{
	QPointer<CvTrackbar> t = new CvTrackbar(w,name,value, count, on_change, userdata);
	t->setAlignment(Qt::AlignHCenter);

	QPointer<QBoxLayout> myLayout;

	if (w)
	{
		myLayout = w->myBarLayout;
	}
	else
	{
		myLayout = global_control_panel->myLayout;

		//if first one, enable control panel
		if (myLayout->count() == 0)
			guiMainThread->enablePropertiesButtonEachWindow();
	}

	myLayout->insertLayout( myLayout->count(),t);


}

//addSlider is static
void CvWindow::addSlider(CvWindow* w,QString name, int* value, int count,CvTrackbarCallback on_change)
{
	QPointer<CvTrackbar> t = new CvTrackbar(w,name,value, count, on_change);
	t->setAlignment(Qt::AlignHCenter);

	QPointer<QBoxLayout> myLayout;

	if (w)
	{
		myLayout = w->myBarLayout;
	}
	else
	{
		myLayout = global_control_panel->myLayout;

		//if first one, enable control panel
		if (myLayout->count() == 0)
			guiMainThread->enablePropertiesButtonEachWindow();
	}

	myLayout->insertLayout( myLayout->count(),t);


}

//Need more test here !
void CvWindow::keyPressEvent(QKeyEvent *event)
{
	//see http://doc.trolltech.com/4.6/qt.html#Key-enum
	int key = event->key();
	bool goodKey = false;

	if (key>=20 && key<=255 )
	{
		key = (int)event->text().toLocal8Bit().at(0);
		goodKey = true;
	}

	if (key == Qt::Key_Escape)
	{
		key = 27;
		goodKey = true;
	}

	//control plus (Z, +, -, up, down, left, right) are used for zoom/panning functions
	if (event->modifiers() != Qt::ControlModifier && goodKey)
	{
		mutexKey.lock();
		last_key = key;
		//last_key = event->nativeVirtualKey ();
		mutexKey.unlock();
		key_pressed.wakeAll();
		//event->accept();
	}

	QWidget::keyPressEvent(event);
}

//TODO: load CV_GUI flag (done) and act accordingly (create win property if needed and attach trackbars)
void CvWindow::readSettings()
{
	//organisation and application's name
	QSettings settings("OpenCV2", QFileInfo(QApplication::applicationFilePath()).fileName());
	QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
	QSize size = settings.value("size", QSize(400, 400)).toSize();
	//param_name = settings.value("name_window",param_name).toString();
	param_flags = settings.value("mode_resize",param_flags).toInt();
	param_gui_mode = settings.value("mode_gui",param_gui_mode).toInt();

	param_ratio_mode = settings.value("mode_ratio",param_ratio_mode).toInt();
	myview->param_keepRatio = settings.value("view_aspectRatio",myview->param_keepRatio).toInt();

	param_flags = settings.value("mode_resize",param_flags).toInt();
	qreal m11 = settings.value("matrix_view.m11",myview->param_matrixWorld.m11()).toDouble();
	qreal m12 = settings.value("matrix_view.m12",myview->param_matrixWorld.m12()).toDouble();
	qreal m13 = settings.value("matrix_view.m13",myview->param_matrixWorld.m13()).toDouble();
	qreal m21 = settings.value("matrix_view.m21",myview->param_matrixWorld.m21()).toDouble();
	qreal m22 = settings.value("matrix_view.m22",myview->param_matrixWorld.m22()).toDouble();
	qreal m23 = settings.value("matrix_view.m23",myview->param_matrixWorld.m23()).toDouble();
	qreal m31 = settings.value("matrix_view.m31",myview->param_matrixWorld.m31()).toDouble();
	qreal m32 = settings.value("matrix_view.m32",myview->param_matrixWorld.m32()).toDouble();
	qreal m33 = settings.value("matrix_view.m33",myview->param_matrixWorld.m33()).toDouble();
	myview->param_matrixWorld = QTransform(m11,m12,m13,m21,m22,m23,m31,m32,m33);

	//trackbar here
	icvLoadTrackbars(&settings);

	resize(size);
	move(pos);

	if (global_control_panel)
	{
		icvLoadControlPanel();
		global_control_panel->move(settings.value("posPanel", global_control_panel->pos()).toPoint());
	}
}

void CvWindow::writeSettings()
{
	//organisation and application's name
	QSettings settings("OpenCV2", QFileInfo(QApplication::applicationFilePath()).fileName());
	//settings.setValue("name_window",param_name);
	settings.setValue("pos", pos());
	settings.setValue("size", size());
	settings.setValue("mode_resize",param_flags);
	settings.setValue("mode_gui",param_gui_mode);

	settings.setValue("param_ratio_mode",param_ratio_mode);
	settings.setValue("view_aspectRatio",myview->param_keepRatio);

	settings.setValue("matrix_view.m11",myview->param_matrixWorld.m11());
	settings.setValue("matrix_view.m12",myview->param_matrixWorld.m12());
	settings.setValue("matrix_view.m13",myview->param_matrixWorld.m13());
	settings.setValue("matrix_view.m21",myview->param_matrixWorld.m21());
	settings.setValue("matrix_view.m22",myview->param_matrixWorld.m22());
	settings.setValue("matrix_view.m23",myview->param_matrixWorld.m23());
	settings.setValue("matrix_view.m31",myview->param_matrixWorld.m31());
	settings.setValue("matrix_view.m32",myview->param_matrixWorld.m32());
	settings.setValue("matrix_view.m33",myview->param_matrixWorld.m33());

	icvSaveTrackbars(&settings);


	if (global_control_panel)
	{
		icvSaveControlPanel();
		settings.setValue("posPanel", global_control_panel->pos());
	}
}

void CvWindow::icvLoadControlPanel()
{
	QSettings settings("OpenCV2", QFileInfo(QApplication::applicationFilePath()).fileName()+" control panel");
	int size = settings.beginReadArray("bars");
	int subsize;
	CvBar* t;
	if (size == global_control_panel->myLayout->layout()->count())
		for (int i = 0; i < size; ++i) {
			t = (CvBar*) global_control_panel->myLayout->layout()->itemAt(i);
			settings.setArrayIndex(i);
			if (t->type == type_CvTrackbar)
			{
				if (t->name_bar == settings.value("namebar").toString())
				{
					((CvTrackbar*)t)->slider->setValue(settings.value("valuebar").toInt());
				}
			}
			if (t->type == type_CvButtonbar)
			{
				subsize = settings.beginReadArray(QString("buttonbar")+i);

				if ( subsize == ((CvButtonbar*)t)->layout()->count() )
					icvLoadButtonbar((CvButtonbar*)t,&settings);
				
				settings.endArray();
			}
		}
		settings.endArray();
}

void CvWindow::icvSaveControlPanel()
{
	QSettings settings("OpenCV2", QFileInfo(QApplication::applicationFilePath()).fileName()+" control panel");
	settings.beginWriteArray("bars");

	CvBar* t;
	for (int i = 0; i < global_control_panel->myLayout->layout()->count(); ++i) {
		t = (CvBar*) global_control_panel->myLayout->layout()->itemAt(i);
		settings.setArrayIndex(i);
		if (t->type == type_CvTrackbar)
		{
			settings.setValue("namebar", QString(t->name_bar));
			settings.setValue("valuebar",((CvTrackbar*)t)->slider->value());
		}
		if (t->type == type_CvButtonbar)
		{
			settings.beginWriteArray(QString("buttonbar")+i);
			icvSaveButtonbar((CvButtonbar*)t,&settings);
			settings.endArray();
		}
	}
	settings.endArray();
}

void CvWindow::icvSaveButtonbar(CvButtonbar* b,QSettings *settings)
{
	QWidget* temp;
	QString myclass;
	for (int i = 0; i < b->layout()->count(); ++i) {
		settings->setArrayIndex(i);
		temp = (QWidget*) b->layout()->itemAt(i)->widget();
		myclass = QString(temp->metaObject ()->className ());
		if (myclass == "CvPushButton")
		{
			CvPushButton* button = (CvPushButton*) temp;
			settings->setValue("namebutton", QString(button->text()) );
			settings->setValue("valuebutton", int(button->isChecked()));
		}

		if (myclass == "CvCheckBox")
		{
			CvCheckBox* button = (CvCheckBox*) temp;
			settings->setValue("namebutton", QString(button->text()) );
			settings->setValue("valuebutton", int(button->isChecked()));
		}

		if (myclass == "CvRadioButton")
		{
			CvRadioButton* button = (CvRadioButton*) temp;
			settings->setValue("namebutton", QString(button->text()) );
			settings->setValue("valuebutton", int(button->isChecked()));
		}
	}
}

void CvWindow::icvLoadButtonbar(CvButtonbar* b,QSettings *settings)
{
	QWidget* temp;
	QString myclass;
	for (int i = 0; i < b->layout()->count(); ++i)
	{
		settings->setArrayIndex(i);
		temp = (QWidget*) b->layout()->itemAt(i)->widget();
		myclass = QString(temp->metaObject ()->className ());
		if (myclass == "CvPushButton")
		{
			CvPushButton* button = (CvPushButton*) temp;
			if (button->text() == settings->value("namebutton").toString())
				button->setChecked(settings->value("valuebutton").toInt());
		}

		if (myclass == "CvCheckBox")
		{
			CvCheckBox* button = (CvCheckBox*) temp;
			if (button->text() == settings->value("namebutton").toString())
				button->setChecked(settings->value("valuebutton").toInt());
		}

		if (myclass == "CvRadioButton")
		{
			CvRadioButton* button = (CvRadioButton*) temp;
			if (button->text() == settings->value("namebutton").toString())
				button->setChecked(settings->value("valuebutton").toInt());
		}

	}
}


void CvWindow::icvLoadTrackbars(QSettings *settings)
{
	int size = settings->beginReadArray("trackbars");
	QPointer<CvTrackbar> t;

	//trackbar are saved in the same order, so no need to use icvFindTrackbarByName

	if (myBarLayout->layout()->count() == size)//if not the same number, the window saved and loaded is not the same (nb trackbar not equal)
		for (int i = 0; i < size; ++i)
		{
			settings->setArrayIndex(i);
			t = (CvTrackbar*)  myBarLayout->layout()->itemAt(i);

			if (t->name_bar == settings->value("name").toString())
				t->slider->setValue(settings->value("value").toInt());

		}
		settings->endArray();

}

void CvWindow::icvSaveTrackbars(QSettings *settings)
{
	QPointer<CvTrackbar> t;

	settings->beginWriteArray("trackbars");

	for (int i = 0; i < myBarLayout->layout()->count(); ++i) {
		t = (CvTrackbar*) myBarLayout->layout()->itemAt(i);
		settings->setArrayIndex(i);
		settings->setValue("name", t->name_bar);
		settings->setValue("value", t->slider->value());
	}
	settings->endArray();
}







//Here is ViewPort class
ViewPort::ViewPort(CvWindow* arg, int arg2, int arg3)
{
	centralWidget = arg,
	setParent(centralWidget);
	mode_display = arg2;
	param_keepRatio = arg3;


	//setAlignment(Qt::AlignLeft | Qt::AlignTop);
	setContentsMargins(0,0,0,0);

	setObjectName(QString::fromUtf8("graphicsView"));
	timerDisplay = new QTimer(this);
	timerDisplay->setSingleShot(true);
	connect(timerDisplay, SIGNAL(timeout()), this, SLOT(stopDisplayInfo()));
	drawInfo = false;
	positionGrabbing = QPointF(0,0);
	positionCorners = QRect(0,0,size().width(),size().height());
	on_mouse = NULL;
	mouseCoordinate = QPoint(-1,-1);
	on_openGL_draw3D = NULL;

	//no border
	setStyleSheet( "QGraphicsView { border-style: none; }" ); 

#if defined( HAVE_QT_OPENGL )
	
	if ( mode_display == CV_MODE_OPENGL)
	{
		myGL = new QGLWidget(QGLFormat(QGL::SampleBuffers));
		setViewport(myGL);
		if (param_keepRatio == CV_WINDOW_KEEPRATIO)
		{
		//TODO: fix this bug:
		//::::blinking in OpenGL with CV_WINDOW_KEEPRATIO::::
		//The raison is that to move the widget in the middle and resize it manually to keep the aspect ratio,
		//we resize in resizeEvent() and use a trick not to be blocked in an infinity loop.
		//This is working fine if the viewport is not OpenGL, however we have two rendering with OpenGL.
		//The first rendering with the widget not moved in the midle (so stuck in top left), then the final and correct rendering.
		//This two rendering are visible with OpenGL and CV_WINDOW_KEEPRATIO but not with native rendering (why ???)

		//I tried to use Qt::AlignCenter of the layout manager but the widget does not expand anymore
		//I tried to center with painter.drawImage (in draw2D), but the imgRegion and all other function using the size of the widget will not work anymore.
		startDisplayInfo("WARNING: For now, you cannot use OpenGL rendering with CV_WINDOW_KEEPRATIO, so we changed to CV_WINDOW_FREERATIO", 5000);
		setRatio(CV_WINDOW_FREERATIO);
		}

		//setViewport(new QGLWidget());
		angle = DEFAULT_ANGLE;
		zmin = DEFAULT_ZMIN;
		zmax = DEFAULT_ZMAX;
		initGL();
	}

#endif

	image2Draw_mat = cvCreateMat( viewport()->width(),viewport()->height(), CV_8UC3 );

	nbChannelOriginImage = 0;
	cvZero(image2Draw_mat);

	setInteractive(false);
	setMouseTracking (true);//receive mouse event everytime

}

ViewPort::~ViewPort()
{
	if (image2Draw_mat)
		
		cvReleaseMat(&image2Draw_mat);

	
//#if defined( HAVE_QT_OPENGL )
//	if (myGL)
//		delete myGL;
//#endif;

	delete timerDisplay;
}

void ViewPort::contextMenuEvent(QContextMenuEvent *event)
{
	if (centralWidget->vect_QActions.size() > 0)
	{
		QMenu menu(this);
		foreach (QAction *a, centralWidget->vect_QActions)
			menu.addAction(a);
		//   menu.popup(event->globalPos());
		menu.exec(event->globalPos());
	}
}

//can save as JPG, JPEG, BMP, PNG
void ViewPort::saveView()
{
	QDate date_d = QDate::currentDate ();
	QString date_s = date_d.toString("dd.MM.yyyy");
	QString name_s = centralWidget->param_name+"_screenshot_"+date_s;

	QString fileName = QFileDialog::getSaveFileName(this, tr("Save File %1").arg(name_s),
		name_s+".png",
		tr("Images (*.png *.jpg *.bmp *.jpeg)"));

	if (!fileName.isEmpty ())//save the picture
	{
		QString extension = fileName.right(3);


#if defined( HAVE_QT_OPENGL )
		image2Draw_qt_resized = ((QGLWidget*)viewport())->grabFrameBuffer();
#else
		//   (no need anymore) create the image resized to receive the 'screenshot'
		//    image2Draw_qt_resized = QImage(viewport()->width(), viewport()->height(),QImage::Format_RGB888);
		
		QPainter saveimage(&image2Draw_qt_resized);
		this->render(&saveimage);
#endif

		// Save it..
		if (QString::compare(extension, "png", Qt::CaseInsensitive) == 0)
		{
			image2Draw_qt_resized.save(fileName, "PNG");
			return;
		}

		if (QString::compare(extension, "jpg", Qt::CaseInsensitive) == 0)
		{
			image2Draw_qt_resized.save(fileName, "JPG");
			return;
		}

		if (QString::compare(extension, "bmp", Qt::CaseInsensitive) == 0)
		{
			image2Draw_qt_resized.save(fileName, "BMP");
			return;
		}

		if (QString::compare(extension, "jpeg", Qt::CaseInsensitive) == 0)
		{
			image2Draw_qt_resized.save(fileName, "JPEG");
			return;
		}

		CV_Error(CV_StsNullPtr, "file extension not recognized, please choose between JPG, JPEG, BMP or PNG");
	}
}

void ViewPort::setRatio(int flags)
{
	centralWidget->param_ratio_mode = flags;
	param_keepRatio = flags;
	updateGeometry();
	viewport()->update();
}

void ViewPort::imgRegion()
{
	scaleView( (threshold_zoom_img_region/param_matrixWorld.m11()-1)*5,QPointF(size().width()/2,size().height()/2));
}

int ViewPort::getRatio()
{
	return param_keepRatio;
}

void ViewPort::resetZoom()
{
	param_matrixWorld.reset();
	controlImagePosition();
}

void ViewPort::ZoomIn()
{
	scaleView( 0.5,QPointF(size().width()/2,size().height()/2));
}

void ViewPort::ZoomOut()
{
	scaleView( -0.5,QPointF(size().width()/2,size().height()/2));
}

//Note: move 2 percent of the window
void  ViewPort::siftWindowOnLeft()
{
	float delta = 2*width()/(100.0*param_matrixWorld.m11());
	moveView(QPointF(delta,0));
}

//Note: move 2 percent of the window
void  ViewPort::siftWindowOnRight()
{
	float delta = -2*width()/(100.0*param_matrixWorld.m11());
	moveView(QPointF(delta,0));
}

//Note: move 2 percent of the window
void  ViewPort::siftWindowOnUp()
{
	float delta = 2*height()/(100.0*param_matrixWorld.m11());
	moveView(QPointF(0,delta));
}

//Note: move 2 percent of the window
void  ViewPort::siftWindowOnDown()
{
	float delta = -2*height()/(100.0*param_matrixWorld.m11());
	moveView(QPointF(0,delta));
}

void ViewPort::startDisplayInfo(QString text, int delayms)
{
	if (timerDisplay->isActive())
		stopDisplayInfo();

	infoText = text;
	timerDisplay->start(delayms);
	drawInfo = true;
}

void ViewPort::stopDisplayInfo()
{
	timerDisplay->stop();
	drawInfo = false;
}

inline bool ViewPort::isSameSize(IplImage* img1,IplImage* img2)
{
	return img1->width == img2->width && img1->height == img2->height;
}

void ViewPort::updateImage(const CvArr *arr)
{
	//if (!arr)
	//CV_Error(CV_StsNullPtr, "NULL arr pointer (in showImage)" );
	CV_Assert(arr)

	CvMat * mat, stub;
	int origin=0;

	if( CV_IS_IMAGE_HDR( arr ))
		origin = ((IplImage*)arr)->origin;

	mat = cvGetMat(arr, &stub);

	//IplImage* tempImage = (IplImage*)arr;

	if( CV_IS_IMAGE_HDR( arr ))
		origin = ((IplImage*)arr)->origin;

	if (!CV_ARE_SIZES_EQ(image2Draw_mat,mat))
	{
		cvReleaseMat(&image2Draw_mat);
		//the image in ipl (to do a deep copy with cvCvtColor)
		image2Draw_mat = cvCreateMat( mat->rows, mat->cols, CV_8UC3 );

		updateGeometry();
	}

	nbChannelOriginImage = cvGetElemType(mat);

	cvConvertImage(mat,image2Draw_mat,(origin != 0 ? CV_CVTIMG_FLIP : 0) + CV_CVTIMG_SWAP_RB );

	viewport()->update();
}

void ViewPort::setMouseCallBack(CvMouseCallback m, void* param)
{
	on_mouse = m;
	on_mouse_param = param;
}

void ViewPort::setOpenGLCallback(CvOpenGLCallback func,void* userdata, double angle_arg, double zmin_arg, double zmax_arg)
{
	//avoid unreferenced formal parameter warning with vs 2008
	//http://msdn.microsoft.com/en-en/library/26kb9fy0%28VS.80%29.aspx
	func;userdata;angle_arg;zmin_arg;zmax_arg;

#if defined( HAVE_QT_OPENGL )
	on_openGL_draw3D = func;
	on_openGL_param = userdata;

	if (angle_arg > 0)
		angle = angle_arg;
	else
		angle = DEFAULT_ANGLE;


	if (zmin_arg >= 0)
		zmin = zmin_arg;
	else
		zmin = DEFAULT_ZMIN;


	if (zmax_arg > 0)
		zmax = zmax_arg;
	else
		zmax = DEFAULT_ZMAX;
#endif
}

void ViewPort::controlImagePosition()
{
	qreal left, top, right, bottom;

	//after check top-left, bottom right corner to avoid getting "out" during zoom/panning
	param_matrixWorld.map(0,0,&left,&top);

	if (left > 0)
	{
		param_matrixWorld.translate(-left,0);
		left = 0;
	}
	if (top > 0)
	{
		param_matrixWorld.translate(0,-top);
		top = 0;
	}
	//-------

	QSize sizeImage = size();
	param_matrixWorld.map(sizeImage.width(),sizeImage.height(),&right,&bottom);
	if (right < sizeImage.width())
	{
		param_matrixWorld.translate(sizeImage.width()-right,0);
		right = sizeImage.width();
	}
	if (bottom < sizeImage.height())
	{
		param_matrixWorld.translate(0,sizeImage.height()-bottom);
		bottom = sizeImage.height();
	}

	//save corner position
	positionCorners.setTopLeft(QPoint(left,top));
	positionCorners.setBottomRight(QPoint(right,bottom));
	//save also the inv matrix
	matrixWorld_inv = param_matrixWorld.inverted();

	//viewport()->update();
}

void ViewPort::moveView(QPointF delta)
{
	param_matrixWorld.translate(delta.x(),delta.y());
	controlImagePosition();
	viewport()->update();
}

//factor is -0.5 (zoom out) or 0.5 (zoom in)
void ViewPort::scaleView(qreal factor,QPointF center)
{
	factor/=5;//-0.1 <-> 0.1
	factor+=1;//0.9 <-> 1.1

	//limit zoom out ---
	if (param_matrixWorld.m11()==1 && factor < 1)
		return;

	if (param_matrixWorld.m11()*factor<1)
		factor = 1/param_matrixWorld.m11();


	//limit zoom int ---
	if (param_matrixWorld.m11()>100 && factor > 1)
		return;

	//inverse the transform
	int a, b;
	matrixWorld_inv.map(center.x(),center.y(),&a,&b);

	param_matrixWorld.translate(a-factor*a,b-factor*b);
	param_matrixWorld.scale(factor,factor);

	controlImagePosition();

	//display new zoom
	if (centralWidget->myStatusBar)
		centralWidget->displayStatusBar(tr("Zoom: %1%").arg(param_matrixWorld.m11()*100),1000);

	if (param_matrixWorld.m11()>1)
		setCursor(Qt::OpenHandCursor);
	else
		unsetCursor();
}

void ViewPort::wheelEvent(QWheelEvent *event)
{
	scaleView( -event->delta() / 240.0,event->pos());
	viewport()->update();
}

void ViewPort::mousePressEvent(QMouseEvent *event)
{
	int cv_event = -1, flags = 0;
	QPoint pt = event->pos();

	//icvmouseHandler: pass parameters for cv_event, flags
	icvmouseHandler(event, mouse_down, cv_event, flags);
	icvmouseProcessing(QPointF(pt), cv_event, flags);

	if (param_matrixWorld.m11()>1)
	{
		setCursor(Qt::ClosedHandCursor);
		positionGrabbing = event->pos();
	}

	QWidget::mousePressEvent(event);
}

void ViewPort::mouseReleaseEvent(QMouseEvent *event)
{

	int cv_event = -1, flags = 0;
	QPoint pt = event->pos();

	//icvmouseHandler: pass parameters for cv_event, flags
	icvmouseHandler(event, mouse_up, cv_event, flags);
	icvmouseProcessing(QPointF(pt), cv_event, flags);

	if (param_matrixWorld.m11()>1)
		setCursor(Qt::OpenHandCursor);

	QWidget::mouseReleaseEvent(event);
}

void ViewPort::mouseDoubleClickEvent(QMouseEvent *event)
{
	int cv_event = -1, flags = 0;
	QPoint pt = event->pos();

	//icvmouseHandler: pass parameters for cv_event, flags
	icvmouseHandler(event, mouse_dbclick, cv_event, flags);
	icvmouseProcessing(QPointF(pt), cv_event, flags);

	QWidget::mouseDoubleClickEvent(event);
}

void ViewPort::mouseMoveEvent(QMouseEvent *event)
{
	int cv_event = -1, flags = 0;
	QPoint pt = event->pos();

	//icvmouseHandler: pass parameters for cv_event, flags
	icvmouseHandler(event, mouse_move, cv_event, flags);
	icvmouseProcessing(QPointF(pt), cv_event, flags);


	if (param_matrixWorld.m11()>1 && event->buttons() == Qt::LeftButton)
	{
		QPointF dxy = (pt - positionGrabbing)/param_matrixWorld.m11();
		positionGrabbing = event->pos();
		moveView(dxy);
	}

	//I update the statusbar here because if the user does a cvWaitkey(0) (like with inpaint.cpp)
	//the status bar will only be repaint when a click occurs.
	if (centralWidget->myStatusBar)
		viewport()->update();

	QWidget::mouseMoveEvent(event);
}

//up, down, dclick, move
void ViewPort::icvmouseHandler(QMouseEvent *event, type_mouse_event category, int &cv_event, int &flags)
{

	switch(event->modifiers())
	{
	case Qt::ShiftModifier:
		flags = CV_EVENT_FLAG_SHIFTKEY;
		break;
	case Qt::ControlModifier:
		flags = CV_EVENT_FLAG_CTRLKEY;
		break;
	case Qt::AltModifier:
		flags = CV_EVENT_FLAG_ALTKEY;
		break;
	case Qt::NoModifier	:
		break;
	case Qt::MetaModifier:
		break;
	case Qt::KeypadModifier:
		break;
	default:;
	}

	switch(event->button())
	{
	case Qt::LeftButton:
		cv_event = tableMouseButtons[category][0];
		flags |= CV_EVENT_FLAG_LBUTTON;
		break;
	case Qt::RightButton:
		cv_event = tableMouseButtons[category][1];
		flags |= CV_EVENT_FLAG_RBUTTON;
		break;
	case Qt::MidButton:
		cv_event = tableMouseButtons[category][2];
		flags |= CV_EVENT_FLAG_MBUTTON;
		break;
	default:;
	}
}

void ViewPort::icvmouseProcessing(QPointF pt, int cv_event, int flags)
{
	//to convert mouse coordinate
	qreal pfx, pfy;
	matrixWorld_inv.map(pt.x(),pt.y(),&pfx,&pfy);
	
	mouseCoordinate.rx()=floor(pfx/ratioX);
	mouseCoordinate.ry()=floor(pfy/ratioY);

	if (on_mouse)
		on_mouse( cv_event, mouseCoordinate.x(),mouseCoordinate.y(), flags, on_mouse_param );

}

QSize ViewPort::sizeHint() const
{
	if(image2Draw_mat)
		return QSize(image2Draw_mat->cols,image2Draw_mat->rows);
	else
		return QGraphicsView::sizeHint();
}

void ViewPort::resizeEvent ( QResizeEvent *event)
{

	controlImagePosition();
	ratioX=width()/float(image2Draw_mat->cols);
	ratioY=height()/float(image2Draw_mat->rows);

	
	if(param_keepRatio == CV_WINDOW_KEEPRATIO)//to keep the same aspect ratio
	{
		QSize newSize = QSize(image2Draw_mat->cols,image2Draw_mat->rows);
		newSize.scale(event->size(),Qt::KeepAspectRatio);

		//imageWidth/imageHeight = newWidth/newHeight +/- epsilon
		//ratioX = ratioY +/- epsilon
		//||ratioX - ratioY|| = epsilon
		if (fabs(ratioX - ratioY)*100> ratioX)//avoid infinity loop / epsilon = 1% of ratioX
		{
			resize(newSize);

			//move to the middle
			//newSize get the delta offset to place the picture in the middle of its parent
			newSize= (event->size()-newSize)/2;

			//if the toolbar is displayed, avoid drawing myview on top of it
			if (centralWidget->myToolBar)
				if(!centralWidget->myToolBar->isHidden())
					newSize +=QSize(0,centralWidget->myToolBar->height());

			move(newSize.width(),newSize.height());
		}
	}

	return QGraphicsView::resizeEvent(event);
}

void ViewPort::paintEvent(QPaintEvent* event)
{

	QPainter myPainter(viewport());
	myPainter.setWorldTransform(param_matrixWorld);

	draw2D(&myPainter);

#if defined( HAVE_QT_OPENGL )
	if ( mode_display == CV_MODE_OPENGL && on_openGL_draw3D)
	{
		myPainter.save(); // Needed when using the GL1 engine
		myPainter.beginNativePainting(); // Needed when using the GL2 engine

		setGL(width(),height());
		on_openGL_draw3D(on_openGL_param);
		unsetGL();

		myPainter.endNativePainting(); // Needed when using the GL2 engine
		myPainter.restore(); // Needed when using the GL1 engine
	}
#endif

	//Now disable matrixWorld for overlay display
	myPainter.setWorldMatrixEnabled (false );

	//in mode zoom/panning
	if (param_matrixWorld.m11()>1)
	{
		
		if (param_matrixWorld.m11()>=threshold_zoom_img_region)
		{
			if (centralWidget->param_flags == CV_WINDOW_NORMAL)
				startDisplayInfo("WARNING: The values displayed are the resized image's values. If you want the original image's values, use CV_WINDOW_AUTOSIZE", 1000);

			drawImgRegion(&myPainter);
		}

		drawViewOverview(&myPainter);
	}

	//for information overlay
	if (drawInfo)
		drawInstructions(&myPainter);

	//for statusbar
	if (centralWidget->myStatusBar)
		drawStatusBar();

	QGraphicsView::paintEvent(event);
}

void ViewPort::draw2D(QPainter *painter)
{
	image2Draw_qt = QImage((uchar*) image2Draw_mat->data.ptr, image2Draw_mat->cols, image2Draw_mat->rows,QImage::Format_RGB888);
	image2Draw_qt_resized = image2Draw_qt.scaled(viewport()->width(),viewport()->height(),Qt::IgnoreAspectRatio,Qt::SmoothTransformation);
	painter->drawImage(0,0,image2Draw_qt_resized);
	//painter->drawImage(0,0,image2Draw_qt_resized);
}

//only if CV_8UC1 or CV_8UC3
void ViewPort::drawStatusBar()
{
	if (mouseCoordinate.x()>=0 &&
		mouseCoordinate.y()>=0 &&
		mouseCoordinate.x()<image2Draw_mat->cols &&
		mouseCoordinate.y()<image2Draw_mat->rows)
	{
		QRgb rgbValue = image2Draw_qt.pixel(mouseCoordinate);

		if (nbChannelOriginImage==CV_8UC3 )
		{
			centralWidget->myStatusBar_msg->setText(tr("<font color='black'>Coordinate: %1x%2 ~ </font>")
				.arg(mouseCoordinate.x())
				.arg(mouseCoordinate.y())+
				tr("<font color='red'>R:%3 </font>").arg(qRed(rgbValue))+//.arg(value.val[0])+
				tr("<font color='green'>G:%4 </font>").arg(qGreen(rgbValue))+//.arg(value.val[1])+
				tr("<font color='blue'>B:%5</font>").arg(qBlue(rgbValue))//.arg(value.val[2])
				);
		}

		if (nbChannelOriginImage==CV_8UC1)
		{
			//all the channel have the same value (because of cvconvertimage), so only the r channel is dsplayed
			centralWidget->myStatusBar_msg->setText(tr("<font color='black'>Coordinate: %1x%2 ~ </font>")
				.arg(mouseCoordinate.x())
				.arg(mouseCoordinate.y())+
				tr("<font color='grey'>grey:%3 </font>").arg(qRed(rgbValue))
				);
		}
	}
}


void ViewPort::drawImgRegion(QPainter *painter)
{
	qreal offsetX = param_matrixWorld.dx()/param_matrixWorld.m11();
	offsetX = offsetX - floor(offsetX);
	qreal offsetY = param_matrixWorld.dy()/param_matrixWorld.m11();
	offsetY = offsetY - floor(offsetY);

	QSize view = size();
	QVarLengthArray<QLineF, 30> linesX;
	for (qreal x = offsetX*param_matrixWorld.m11(); x < view.width(); x += param_matrixWorld.m11() )
		linesX.append(QLineF(x, 0, x, view.height()));

	QVarLengthArray<QLineF, 30> linesY;
	for (qreal y = offsetY*param_matrixWorld.m11(); y < view.height(); y += param_matrixWorld.m11() )
		linesY.append(QLineF(0, y, view.width(), y));


	QFont f = painter->font();
	int original_font_size = f.pointSize();
	//change font size
	//f.setPointSize(4+(param_matrixWorld.m11()-threshold_zoom_img_region)/5);
	f.setPixelSize(6+(param_matrixWorld.m11()-threshold_zoom_img_region)/5);
	painter->setFont(f);
	QString val;
	QRgb rgbValue;

	QPointF point1;//sorry, I do not know how to name it
	QPointF point2;//idem

	for (int j=-1;j<height()/param_matrixWorld.m11();j++)//-1 because display the pixels top rows left colums
		for (int i=-1;i<width()/param_matrixWorld.m11();i++)//-1
		{
			point1.setX((i+offsetX)*param_matrixWorld.m11());
			point1.setY((j+offsetY)*param_matrixWorld.m11());

			matrixWorld_inv.map(point1.x(),point1.y(),&point2.rx(),&point2.ry());

			point2.rx()= (long) (point2.x() + 0.5);
			point2.ry()= (long) (point2.y() + 0.5);

			if (point2.x() >= 0 && point2.y() >= 0)
				rgbValue = image2Draw_qt_resized.pixel(QPoint(point2.x(),point2.y()));
			else
				rgbValue = qRgb(0,0,0);

			if (nbChannelOriginImage==3)
			{
				//for debug
				/*
				val = tr("%1 %2").arg(point2.x()).arg(point2.y());
				painter->setPen(QPen(Qt::black, 1));
				painter->drawText(QRect(point1.x(),point1.y(),param_matrixWorld.m11(),param_matrixWorld.m11()/2),
					Qt::AlignCenter, val);
				*/

				val = tr("%1").arg(qRed(rgbValue));
				painter->setPen(QPen(Qt::red, 1));
				painter->drawText(QRect(point1.x(),point1.y(),param_matrixWorld.m11(),param_matrixWorld.m11()/3),
					Qt::AlignCenter, val);

				val = tr("%1").arg(qGreen(rgbValue));
				painter->setPen(QPen(Qt::green, 1));
				painter->drawText(QRect(point1.x(),point1.y()+param_matrixWorld.m11()/3,param_matrixWorld.m11(),param_matrixWorld.m11()/3),
					Qt::AlignCenter, val);

				val = tr("%1").arg(qBlue(rgbValue));
				painter->setPen(QPen(Qt::blue, 1));
				painter->drawText(QRect(point1.x(),point1.y()+2*param_matrixWorld.m11()/3,param_matrixWorld.m11(),param_matrixWorld.m11()/3),
					Qt::AlignCenter, val);

			}
			else
			{

				val = tr("%1").arg(qRed(rgbValue));
				painter->drawText(QRect(point1.x(),point1.y(),param_matrixWorld.m11(),param_matrixWorld.m11()),
					Qt::AlignCenter, val);
			}
		}

		painter->setPen(QPen(Qt::black, 1));
		painter->drawLines(linesX.data(), linesX.size());
		painter->drawLines(linesY.data(), linesY.size());

		//restore font size
		f.setPointSize(original_font_size);
		painter->setFont(f);

}

void ViewPort::drawViewOverview(QPainter *painter)
{
	QSize viewSize = size();
	viewSize.scale ( 100, 100,Qt::KeepAspectRatio );

	const int margin = 5;

	//draw the image's location
	painter->setBrush(QColor(0, 0, 0, 127));
	painter->setPen(Qt::darkGreen);
	painter->drawRect(QRect(width()-viewSize.width()-margin, 0,viewSize.width(),viewSize.height()));

	//daw the view's location inside the image
	qreal ratioSize = 1/param_matrixWorld.m11();
	qreal ratioWindow = (qreal)(viewSize.height())/(qreal)(size().height());
	painter->setPen(Qt::darkBlue);
	painter->drawRect(QRectF(width()-viewSize.width()-positionCorners.left()*ratioSize*ratioWindow-margin,
		-positionCorners.top()*ratioSize*ratioWindow,
		(viewSize.width()-1)*ratioSize,
		(viewSize.height()-1)*ratioSize)
		);
}

void ViewPort::drawInstructions(QPainter *painter)
{
	QFontMetrics metrics = QFontMetrics(font());
	int border = qMax(4, metrics.leading());

	QRect rect = metrics.boundingRect(0, 0, width() - 2*border, int(height()*0.125),
		Qt::AlignCenter | Qt::TextWordWrap, infoText);
	painter->setRenderHint(QPainter::TextAntialiasing);
	painter->fillRect(QRect(0, 0, width(), rect.height() + 2*border),
		QColor(0, 0, 0, 127));
	painter->setPen(Qt::white);
	painter->fillRect(QRect(0, 0, width(), rect.height() + 2*border),
		QColor(0, 0, 0, 127));

	painter->drawText((width() - rect.width())/2, border,
		rect.width(), rect.height(),
		Qt::AlignCenter | Qt::TextWordWrap, infoText);
}














#if defined( HAVE_QT_OPENGL )//all this section -> not tested

void ViewPort::initGL()
{
	glShadeModel( GL_SMOOTH );
	glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
	glEnable( GL_TEXTURE_2D );
	glEnable( GL_CULL_FACE );
	glEnable( GL_DEPTH_TEST );
}

//from http://steinsoft.net/index.php?site=Programming/Code%20Snippets/OpenGL/gluperspective
//do not want to link glu
void ViewPort::icvgluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
{
	GLdouble xmin, xmax, ymin, ymax;

	ymax = zNear * tan(fovy * M_PI / 360.0);
	ymin = -ymax;
	xmin = ymin * aspect;
	xmax = ymax * aspect;


	glFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
}


void ViewPort::setGL(int width, int height)
{
	glMatrixMode(GL_PROJECTION);
	glPushMatrix();
	glLoadIdentity();
	icvgluPerspective(angle, float(width) / float(height), zmin, zmax);
	glMatrixMode(GL_MODELVIEW);
	glPushMatrix();
	glLoadIdentity();
}

void ViewPort::unsetGL()
{
	glPopMatrix();
	glMatrixMode(GL_PROJECTION);
	glPopMatrix();
}
#endif

#endif