root/modules/highgui/src/window_QT.cpp

DEFINITIONS

1. autoBlockingConnection
2. cvFontQt
3. cvAddText
4. cvGetRatioWindow_QT
5. cvSetRatioWindow_QT
6. cvGetPropWindow_QT
7. cvSetPropWindow_QT
8. setWindowTitle
9. cvSetModeWindow_QT
10. cvGetModeWindow_QT
11. cvDisplayOverlay
12. cvSaveWindowParameters
13. cvLoadWindowParameters
14. cvDisplayStatusBar
15. cvWaitKey
16. cvStartLoop
17. cvStopLoop
18. icvFindWindowByName
19. icvFindBarByName
20. icvFindTrackBarByName
21. icvInitSystem
22. cvInitSystem
23. cvNamedWindow
24. cvDestroyWindow
25. cvDestroyAllWindows
26. cvGetWindowHandle
27. cvGetWindowName
28. cvMoveWindow
29. cvResizeWindow
30. cvCreateTrackbar2
31. cvStartWindowThread
32. cvCreateTrackbar
33. cvCreateButton
34. cvGetTrackbarPos
35. cvSetTrackbarPos
36. cvSetTrackbarMax
37. cvSetMouseCallback
38. cvShowImage
39. cvSetOpenGlDrawCallback
40. cvSetOpenGlContext
41. cvUpdateWindow
42. cvGetOpenGlProp_QT
43. nb_windows
44. isLastWindow
45. putText
46. saveWindowParameters
47. loadWindowParameters
48. getRatioWindow
49. setRatioWindow
50. getPropWindow
51. setPropWindow
52. setWindowTitle
53. isFullScreen
54. toggleFullScreen
55. createWindow
56. timeOut
57. displayInfo
58. displayStatusBar
59. showImage
60. destroyWindow
61. destroyAllWindow
62. moveWindow
63. resizeWindow
64. enablePropertiesButtonEachWindow
65. addButton
66. addSlider2
67. addSlider
68. start
69. setOpenGlDrawCallback
70. setOpenGlContext
71. updateWindow
72. isOpenGl
73. create
74. createDialog
75. update
76. setLabel
77. setLabel
78. addButton
79. callCallBack
80. callCallBack
81. callCallBack
82. closeEvent
83. showEvent
84. hideEvent
85. setMouseCallBack
86. writeSettings
87. readSettings
88. getRatio
89. setRatio
90. getPropWindow
91. setPropWindow
92. toggleFullScreen
93. updateImage
94. displayInfo
95. displayStatusBar
96. enablePropertiesButton
97. createButtonBar
98. addSlider
99. addSlider2
100. setOpenGlDrawCallback
101. makeCurrentOpenGlContext
102. updateGl
103. isOpenGl
104. setViewportSize
105. createBarLayout
106. createGlobalLayout
107. createView
108. createActions
109. createShortcuts
110. createToolBar
111. createStatusBar
112. hideTools
113. showTools
114. createParameterWindow
115. displayPropertiesWin
116. keyPressEvent
117. icvLoadControlPanel
118. icvSaveControlPanel
119. icvSaveButtonbar
120. icvLoadButtonbar
121. icvLoadTrackbars
122. icvSaveTrackbars
123. image2Draw_mat
124. getWidget
125. setMouseCallBack
126. writeSettings
127. readSettings
128. getRatio
129. setRatio
130. updateImage
131. startDisplayInfo
132. setOpenGlDrawCallback
133. makeCurrentOpenGlContext
134. updateGl
135. siftWindowOnLeft
136. siftWindowOnRight
137. siftWindowOnUp
138. siftWindowOnDown
139. imgRegion
140. resetZoom
141. ZoomIn
142. ZoomOut
143. saveView
144. contextMenuEvent
145. resizeEvent
146. wheelEvent
147. mousePressEvent
148. mouseReleaseEvent
149. mouseDoubleClickEvent
150. mouseMoveEvent
151. paintEvent
152. stopDisplayInfo
153. isSameSize
154. controlImagePosition
155. moveView
156. scaleView
157. icvmouseHandler
158. icvmouseProcessing
159. sizeHint
160. draw2D
161. drawStatusBar
162. drawImgRegion
163. drawViewOverview
164. drawInstructions
165. setSize
166. size
167. getWidget
168. setMouseCallBack
169. writeSettings
170. readSettings
171. getRatio
172. setRatio
173. updateImage
174. startDisplayInfo
175. setOpenGlDrawCallback
176. makeCurrentOpenGlContext
177. updateGl
178. initializeGL
179. resizeGL
180. paintGL
181. mousePressEvent
182. mouseReleaseEvent
183. mouseDoubleClickEvent
184. mouseMoveEvent
185. icvmouseHandler
186. icvmouseProcessing
187. sizeHint
188. setSize

//IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.

// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.


//                          License Agreement
//               For Open Source Computer Vision Library

//Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
//Copyright (C) 2008-2010, Willow Garage Inc., all rights reserved.
//Third party copyrights are property of their respective owners.

//Redistribution and use in source and binary forms, with or without modification,
//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.

//  * Redistribution's in binary form must reproduce the above copyright notice,
//  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,
//or tort (including negligence or otherwise) arising in any way out of
//the use of this software, even if advised of the possibility of such damage.

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

#include "precomp.hpp"

#if defined(HAVE_QT)

#include <memory>

#include <window_QT.h>

#include <math.h>

#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif

#ifdef HAVE_QT_OPENGL
    #ifdef Q_WS_X11
        #include <GL/glx.h>
    #endif
#endif


//Static and global first
static GuiReceiver *guiMainThread = NULL;
static int parameterSystemC = 1;
static char* parameterSystemV[] = {(char*)""};
static bool multiThreads = false;
static int last_key = -1;
QWaitCondition key_pressed;
QMutex mutexKey;
static const unsigned int threshold_zoom_img_region = 30;
//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

// Declaration
Qt::ConnectionType autoBlockingConnection();

// Implementation - this allows us to do blocking whilst automatically selecting the right
// behaviour for in-thread and out-of-thread launches of cv windows. Qt strangely doesn't
// cater for this, but does for strictly queued connections.
Qt::ConnectionType autoBlockingConnection() {
  return (QThread::currentThread() != QApplication::instance()->thread())
      ? Qt::BlockingQueuedConnection
      : Qt::DirectConnection;
}

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",
        autoBlockingConnection(),
        Q_ARG(void*, (void*) img),
        Q_ARG(QString,QString::fromUtf8(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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        Q_ARG(QString, QString(name)),
        Q_ARG(double, prop_value));
}

void cv::setWindowTitle(const String& winname, const String& title)
{
    if (!guiMainThread)
        CV_Error(Error::StsNullPtr, "NULL guiReceiver (please create a window)");

    QMetaObject::invokeMethod(guiMainThread,
        "setWindowTitle",
        autoBlockingConnection(),
        Q_ARG(QString, QString(winname.c_str())),
        Q_ARG(QString, QString(title.c_str())));
}


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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        Q_ARG(QString, QString(name)),
        Q_ARG(QString, QString(text)),
        Q_ARG(int, delayms));
}


CV_IMPL int cvWaitKey(int delay)
{
    int result = -1;

    if (!guiMainThread)
        return result;

    unsigned long delayms = delay <= 0 ? ULONG_MAX : delay; //in milliseconds

    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 (delay > 0)
            guiMainThread->timer->start(delay);

        //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();
}


static CvWindow* icvFindWindowByName(QString name)
{
    CvWindow* window = 0;

    //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
        {
            CvWinModel* temp = (CvWinModel*) widget;

            if (temp->type == type_CvWindow)
            {
                CvWindow* w = (CvWindow*) temp;
                if (w->objectName() == name)
                {
                    window = w;
                    break;
                }
            }
        }
    }

    return window;
}


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

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

    for (int i = 0; i < stop_index; ++i)
    {
        CvBar* t = (CvBar*) layout->layout()->itemAt(i);

        if (t->type == type && t->name_bar == name_bar)
            return t;
    }

    return NULL;
}


static CvTrackbar* icvFindTrackBarByName(const char* name_trackbar, const char* name_window, QBoxLayout* layout = NULL)
{
    QString nameQt(name_trackbar);
    QString nameWinQt(name_window);

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

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

        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)
        {
            CvBar* 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);
    }
}

/*
static CvButtonbar* icvFindButtonBarByName(const char* button_name, QBoxLayout* layout)
{
    QString nameQt(button_name);
    return (CvButtonbar*) icvFindBarByName(layout, nameQt, type_CvButtonbar);
}
*/

static int icvInitSystem(int* c, char** v)
{
    //"For any GUI application using Qt, there is precisely one QApplication object"
    if (!QApplication::instance())
    {
        new QApplication(*c, v);
        setlocale(LC_NUMERIC,"C");

        qDebug() << "init done";

#ifdef 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 (QThread::currentThread() != QApplication::instance()->thread()) {
        multiThreads = true;
        QMetaObject::invokeMethod(guiMainThread,
        "createWindow",
        Qt::BlockingQueuedConnection,  // block so that we can do useful stuff once we confirm it is created
        Q_ARG(QString, QString(name)),
        Q_ARG(int, flags));
     } else {
        guiMainThread->createWindow(QString(name), flags);
     }

    return 1; //Dummy value - probably should return the result of the invocation.
}


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

    QMetaObject::invokeMethod(guiMainThread,
        "destroyWindow",
        Qt::AutoConnection,  // if another thread is controlling, let it handle it without blocking ourselves here
        Q_ARG(QString, QString(name)));
}


CV_IMPL void cvDestroyAllWindows()
{
    if (!guiMainThread)
        return;
    QMetaObject::invokeMethod(guiMainThread,
        "destroyAllWindow",
        Qt::AutoConnection  // if another thread is controlling, let it handle it without blocking ourselves here
        );
}


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

    return (void*) icvFindWindowByName(QLatin1String(name));
}


CV_IMPL const char* cvGetWindowName(void* window_handle)
{
    if( !window_handle )
        CV_Error( CV_StsNullPtr, "NULL window handler" );

    return ((CvWindow*)window_handle)->objectName().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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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",
        autoBlockingConnection(),
        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 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);
}


CV_IMPL void cvSetTrackbarMax(const char* name_bar, const char* window_name, int maxval)
{
    if (maxval >= 0)
    {
        QPointer<CvTrackbar> t = icvFindTrackBarByName(name_bar, window_name);
        if (t)
        {
            t->slider->setMaximum(maxval);
        }
    }
}


/* assign callback for mouse events */
CV_IMPL void cvSetMouseCallback(const char* window_name, CvMouseCallback on_mouse, void* param)
{
    QPointer<CvWindow> w = icvFindWindowByName(QLatin1String(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;
    if (QThread::currentThread() != QApplication::instance()->thread()) {
        multiThreads = true;
        QMetaObject::invokeMethod(guiMainThread,
            "showImage",
             autoBlockingConnection(),
             Q_ARG(QString, QString(name)),
             Q_ARG(void*, (void*)arr)
        );
     } else {
        guiMainThread->showImage(QString(name), (void*)arr);
     }
}


#ifdef HAVE_QT_OPENGL

CV_IMPL void cvSetOpenGlDrawCallback(const char* window_name, CvOpenGlDrawCallback callback, void* userdata)
{
    if (!guiMainThread)
        CV_Error( CV_StsNullPtr, "NULL guiReceiver (please create a window)" );

    QMetaObject::invokeMethod(guiMainThread,
        "setOpenGlDrawCallback",
        autoBlockingConnection(),
        Q_ARG(QString, QString(window_name)),
        Q_ARG(void*, (void*)callback),
        Q_ARG(void*, userdata));
}


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

    QMetaObject::invokeMethod(guiMainThread,
        "setOpenGlContext",
        autoBlockingConnection(),
        Q_ARG(QString, QString(window_name)));
}


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

    QMetaObject::invokeMethod(guiMainThread,
        "updateWindow",
        autoBlockingConnection(),
        Q_ARG(QString, QString(window_name)));
}

#endif


double cvGetOpenGlProp_QT(const char* name)
{
    double result = -1;

    if (guiMainThread)
    {
        QMetaObject::invokeMethod(guiMainThread,
            "isOpenGl",
            autoBlockingConnection(),
            Q_RETURN_ARG(double, result),
            Q_ARG(QString, QString(name)));
    }

    return result;
}


//////////////////////////////////////////////////////
// GuiReceiver


GuiReceiver::GuiReceiver() : bTimeOut(false), nb_windows(0)
{
    doesExternalQAppExist = (QApplication::instance() != 0);
    icvInitSystem(&parameterSystemC, parameterSystemV);

    timer = new QTimer(this);
    QObject::connect(timer, SIGNAL(timeout()), this, SLOT(timeOut()));
    timer->setSingleShot(true);
    if ( doesExternalQAppExist ) {
        moveToThread(QApplication::instance()->thread());
    }
}


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

        if (!doesExternalQAppExist)
        {
            qApp->quit();
        }
    }
}


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


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

    CvMat* mat, stub;
    mat = cvGetMat(arr, &stub);

    int nbChannelOriginImage = cvGetElemType(mat);
    if (nbChannelOriginImage != CV_8UC3) return; //for now, font works only with 8UC3

    QImage qimg(mat->data.ptr, mat->cols, mat->rows, mat->step, QImage::Format_RGB888);

    CvFont* font = (CvFont*)arg2;

    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);

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


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

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


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

    if (!w)
        return -1;

    return w->getRatio();
}


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

    if (!w)
        return;

    int flags = (int) arg2;

    w->setRatio(flags);
}


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

    if (!w)
        return -1;

    return (double) w->getPropWindow();
}


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

    if (!w)
        return;

    int flags = (int) arg2;

    w->setPropWindow(flags);
}

void GuiReceiver::setWindowTitle(QString name, QString title)
{
    QPointer<CvWindow> w = icvFindWindowByName(name);

    if (!w)
    {
        cvNamedWindow(name.toLatin1().data());
        w = icvFindWindowByName(name);
    }

    if (!w)
        return;

    w->setWindowTitle(title);
}


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

    if (!w)
        return -1;

    return w->isFullScreen() ? CV_WINDOW_FULLSCREEN : CV_WINDOW_NORMAL;
}


void GuiReceiver::toggleFullScreen(QString name, double arg2)
{
    QPointer<CvWindow> w = icvFindWindowByName(name);

    if (!w)
        return;

    int flags = (int) arg2;

    w->toggleFullScreen(flags);
}


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;
    }

    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);

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


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

    if (w)
        w->displayStatusBar(text, delayms);
}


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

    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);
    }

    if (!w || !arr)
        return; // keep silence here.

    if (w->isOpenGl())
    {
        CvMat* mat, stub;

        mat = cvGetMat(arr, &stub);

        cv::Mat im = cv::cvarrToMat(mat);
        cv::imshow(name.toUtf8().data(), im);
    }
    else
    {
        w->updateImage(arr);
    }

    if (w->isHidden())
        w->show();
}


void GuiReceiver::destroyWindow(QString name)
{

    QPointer<CvWindow> w = icvFindWindowByName(name);

    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)
    {
        // WARNING: this could even close windows from an external parent app
        //#TODO check externalQAppExists and in case it does, close windows carefully,
        //      i.e. apply the className-check from below...
        qApp->closeAllWindows();
    }
    else
    {
        bool isWidgetDeleted = true;
        while(isWidgetDeleted)
        {
            isWidgetDeleted = false;
            QWidgetList list = QApplication::topLevelWidgets();
            for (int i = 0; i < list.count(); i++)
            {
                QObject *obj = list.at(i);
                if (obj->metaObject()->className() == QString("CvWindow"))
                {
                    delete obj;
                    isWidgetDeleted = true;
                    break;
                }
            }
        }
    }
}


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

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


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

    if (w)
    {
        w->showNormal();
        w->setViewportSize(QSize(width, height));
    }
}


void GuiReceiver::enablePropertiesButtonEachWindow()
{
    //For each window, enable window property button
    foreach (QWidget* widget, QApplication::topLevelWidgets())
    {
        if (widget->isWindow() && !widget->parentWidget()) //is a window without parent
        {
            CvWinModel* temp = (CvWinModel*) widget;
            if (temp->type == type_CvWindow)
            {
                CvWindow* w = (CvWindow*) widget;

                //active window properties button
                w->enablePropertiesButton();
            }
        }
    }
}


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;

    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.isEmpty())
    {
        w = icvFindWindowByName(window_name);

        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.isEmpty())
    {
        w = icvFindWindowByName(window_name);

        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();
}


void GuiReceiver::setOpenGlDrawCallback(QString name, void* callback, void* userdata)
{
    QPointer<CvWindow> w = icvFindWindowByName(name);

    if (w)
        w->setOpenGlDrawCallback((CvOpenGlDrawCallback) callback, userdata);
}

void GuiReceiver::setOpenGlContext(QString name)
{
    QPointer<CvWindow> w = icvFindWindowByName(name);

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

void GuiReceiver::updateWindow(QString name)
{
    QPointer<CvWindow> w = icvFindWindowByName(name);

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

double GuiReceiver::isOpenGl(QString name)
{
    double result = -1;

    QPointer<CvWindow> w = icvFindWindowByName(name);

    if (w)
        result = (double) w->isOpenGl();

    return result;
}


//////////////////////////////////////////////////////
// CvTrackbar


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

    create(arg, name, value, _count);
}


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

    create(arg, name, value, _count);
}


void CvTrackbar::create(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);
}


//////////////////////////////////////////////////////
// CvButtonbar


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

    group_button = new QButtonGroup(this);
}


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)
    {
        if (button_type == CV_PUSH_BUTTON)
            QObject::connect(button, SIGNAL(clicked(bool)), button, SLOT(callCallBack(bool)));
        else
            QObject::connect(button, SIGNAL(toggled(bool)), button, SLOT(callCallBack(bool)));

        addWidget(button, Qt::AlignCenter);
    }
}


//////////////////////////////////////////////////////
// Buttons


//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);
}


//////////////////////////////////////////////////////
// CvWinProperties


//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* evnt)
{
    //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", objectName());
    mypos = settings.value("pos", mypos).toPoint();

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


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


CvWinProperties::~CvWinProperties()
{
    //clear the setting pos
    QSettings settings("OpenCV2", objectName());
    settings.remove("pos");
}


//////////////////////////////////////////////////////
// CvWindow


CvWindow::CvWindow(QString name, int arg2)
{
    type = type_CvWindow;

    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(name);
    setObjectName(name);

    setFocus( Qt::PopupFocusReason ); //#1695 arrow keys are not received without the explicit focus

    resize(400, 300);
    setMinimumSize(1, 1);

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

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

    //3: my view
#ifndef HAVE_QT_OPENGL
    if (arg2 & CV_WINDOW_OPENGL)
        CV_Error( CV_OpenGlNotSupported, "Library was built without OpenGL support" );
    mode_display = CV_MODE_NORMAL;
#else
    mode_display = arg2 & CV_WINDOW_OPENGL ? CV_MODE_OPENGL : CV_MODE_NORMAL;
    if (mode_display == CV_MODE_OPENGL)
        param_gui_mode = CV_GUI_NORMAL;
#endif
    createView();

    //4: shortcuts and actions
    //5: toolBar and statusbar
    if (param_gui_mode == CV_GUI_EXPANDED)
    {
        createActions();
        createShortcuts();

        createToolBar();
        createStatusBar();
    }

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

    myGlobalLayout->addWidget(myView->getWidget(), Qt::AlignCenter);

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

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

    setLayout(myGlobalLayout);
    show();
}


CvWindow::~CvWindow()
{
    if (guiMainThread)
        guiMainThread->isLastWindow();
}


void CvWindow::setMouseCallBack(CvMouseCallback callback, void* param)
{
    myView->setMouseCallBack(callback, param);
}


void CvWindow::writeSettings()
{
    //organisation and application's name
    QSettings settings("OpenCV2", QFileInfo(QApplication::applicationFilePath()).fileName());

    settings.setValue("pos", pos());
    settings.setValue("size", size());
    settings.setValue("mode_resize" ,param_flags);
    settings.setValue("mode_gui", param_gui_mode);

    myView->writeSettings(settings);

    icvSaveTrackbars(&settings);

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



//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_flags = settings.value("mode_resize", param_flags).toInt();
    param_gui_mode = settings.value("mode_gui", param_gui_mode).toInt();

    param_flags = settings.value("mode_resize", param_flags).toInt();

    myView->readSettings(settings);

    //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());
    }
}


double CvWindow::getRatio()
{
    return myView->getRatio();
}


void CvWindow::setRatio(int flags)
{
    myView->setRatio(flags);
}


int CvWindow::getPropWindow()
{
    return param_flags;
}


void CvWindow::setPropWindow(int flags)
{
    if (param_flags == flags) //nothing to do
        return;

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

        break;

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

        break;

    default:
        ;
    }
}

void CvWindow::toggleFullScreen(int flags)
{
    if (isFullScreen() && flags == CV_WINDOW_NORMAL)
    {
        showTools();
        showNormal();
        return;
    }

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


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


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


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


void CvWindow::enablePropertiesButton()
{
    if (!vect_QActions.empty())
        vect_QActions[9]->setDisabled(false);
}


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::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);
}


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);
}


void CvWindow::setOpenGlDrawCallback(CvOpenGlDrawCallback callback, void* userdata)
{
    myView->setOpenGlDrawCallback(callback, userdata);
}


void CvWindow::makeCurrentOpenGlContext()
{
    myView->makeCurrentOpenGlContext();
}


void CvWindow::updateGl()
{
    myView->updateGl();
}


bool CvWindow::isOpenGl()
{
    return mode_display == CV_MODE_OPENGL;
}


void CvWindow::setViewportSize(QSize _size)
{
    resize(_size);
    myView->setSize(_size);
}


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::createGlobalLayout()
{
    myGlobalLayout = new QBoxLayout(QBoxLayout::TopToBottom);
    myGlobalLayout->setObjectName(QString::fromUtf8("boxLayout"));
    myGlobalLayout->setContentsMargins(0, 0, 0, 0);
    myGlobalLayout->setSpacing(0);
    myGlobalLayout->setMargin(0);
    setMinimumSize(1, 1);

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


void CvWindow::createView()
{
#ifdef HAVE_QT_OPENGL
    if (isOpenGl())
        myView = new OpenGlViewPort(this);
    else
#endif
        myView = new DefaultViewPort(this, param_ratio_mode);
}


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

    QWidget* view = myView->getWidget();

    //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()), view, 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()), view, 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()), view, 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()), view, 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()), view, 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()), view, SLOT(imgRegion()));

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

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

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

    vect_QActions[9] = new QAction(QIcon(":/properties-icon"), "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);

    QWidget* view = myView->getWidget();

    vect_QShortcuts[0] = new QShortcut(shortcut_panning_left, this);
    QObject::connect(vect_QShortcuts[0], SIGNAL(activated()), view, SLOT(siftWindowOnLeft()));

    vect_QShortcuts[1] = new QShortcut(shortcut_panning_right, this);
    QObject::connect(vect_QShortcuts[1], SIGNAL(activated()), view, SLOT(siftWindowOnRight()));

    vect_QShortcuts[2] = new QShortcut(shortcut_panning_up, this);
    QObject::connect(vect_QShortcuts[2], SIGNAL(activated()), view, SLOT(siftWindowOnUp()));

    vect_QShortcuts[3] = new QShortcut(shortcut_panning_down, this);
    QObject::connect(vect_QShortcuts[3], SIGNAL(activated()), view, SLOT(siftWindowOnDown()));

    vect_QShortcuts[4] = new QShortcut(shortcut_zoom_normal, this);
    QObject::connect(vect_QShortcuts[4], SIGNAL(activated()), view, SLOT(resetZoom()));

    vect_QShortcuts[5] = new QShortcut(shortcut_zoom_imgRegion, this);
    QObject::connect(vect_QShortcuts[5], SIGNAL(activated()), view, SLOT(imgRegion()));

    vect_QShortcuts[6] = new QShortcut(shortcut_zoom_in, this);
    QObject::connect(vect_QShortcuts[6], SIGNAL(activated()), view, SLOT(ZoomIn()));

    vect_QShortcuts[7] = new QShortcut(shortcut_zoom_out, this);
    QObject::connect(vect_QShortcuts[7], SIGNAL(activated()), view, SLOT(ZoomOut()));

    vect_QShortcuts[8] = new QShortcut(shortcut_save_img, this);
    QObject::connect(vect_QShortcuts[8], SIGNAL(activated()), view, 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->setFloatable(false); //is not a window
    myToolBar->setFixedHeight(28);
    myToolBar->setMinimumWidth(1);

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


void CvWindow::createStatusBar()
{
    myStatusBar = new QStatusBar(this);
    myStatusBar->setSizeGripEnabled(false);
    myStatusBar->setFixedHeight(20);
    myStatusBar->setMinimumWidth(1);
    myStatusBar_msg = new QLabel;

    //I comment this because if we change the style, myview (the picture)
    //will not be the correct size anymore (will lost 2 pixel because of the borders)

    //myStatusBar_msg->setFrameStyle(QFrame::Raised);

    myStatusBar_msg->setAlignment(Qt::AlignHCenter);
    myStatusBar->addWidget(myStatusBar_msg);
}


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();
}


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

        Qt::Key qtkey = static_cast<Qt::Key>(key);
        char asciiCode = QTest::keyToAscii(qtkey);
        if (asciiCode != 0)
            key = static_cast<int>(asciiCode);
        else
            key = evnt->nativeVirtualKey(); //same codes as returned by GTK-based backend

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

    QWidget::keyPressEvent(evnt);
}


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

    int bsize = settings.beginReadArray("bars");

    if (bsize == global_control_panel->myLayout->layout()->count())
    {
        for (int i = 0; i < bsize; ++i)
        {
            CvBar* 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)
            {
                int 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");

    for (int i = 0; i < global_control_panel->myLayout->layout()->count(); ++i)
    {
        CvBar* 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)
{
    for (int i = 0, count = b->layout()->count(); i < count; ++i)
    {
        settings->setArrayIndex(i);

        QWidget* temp = (QWidget*) b->layout()->itemAt(i)->widget();
        QString myclass(QLatin1String(temp->metaObject()->className()));

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


void CvWindow::icvLoadButtonbar(CvButtonbar* b, QSettings* settings)
{
    for (int i = 0, count = b->layout()->count(); i < count; ++i)
    {
        settings->setArrayIndex(i);

        QWidget* temp = (QWidget*) b->layout()->itemAt(i)->widget();
        QString myclass(QLatin1String(temp->metaObject()->className()));

        if (myclass == "CvPushButton")
        {
            CvPushButton* button = (CvPushButton*) temp;

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

            if (button->text() == settings->value("namebutton").toString())
                button->setChecked(settings->value("valuebutton").toInt());
        }
        else 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 bsize = settings->beginReadArray("trackbars");

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

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

            CvTrackbar* 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)
{
    settings->beginWriteArray("trackbars");

    for (int i = 0; i < myBarLayout->layout()->count(); ++i)
    {
        settings->setArrayIndex(i);

        CvTrackbar* t = (CvTrackbar*) myBarLayout->layout()->itemAt(i);

        settings->setValue("name", t->name_bar);
        settings->setValue("value", t->slider->value());
    }

    settings->endArray();
}


//////////////////////////////////////////////////////
// DefaultViewPort


DefaultViewPort::DefaultViewPort(CvWindow* arg, int arg2) : QGraphicsView(arg), image2Draw_mat(0)
{
    centralWidget = arg;
    param_keepRatio = arg2;

    setContentsMargins(0, 0, 0, 0);
    setMinimumSize(1, 1);
    setAlignment(Qt::AlignHCenter);

    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 = 0;
    on_mouse_param = 0;
    mouseCoordinate = QPoint(-1, -1);

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

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

    nbChannelOriginImage = 0;

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


DefaultViewPort::~DefaultViewPort()
{
    if (image2Draw_mat)
        cvReleaseMat(&image2Draw_mat);
}


QWidget* DefaultViewPort::getWidget()
{
    return this;
}


void DefaultViewPort::setMouseCallBack(CvMouseCallback m, void* param)
{
    on_mouse = m;

    on_mouse_param = param;
}

void DefaultViewPort::writeSettings(QSettings& settings)
{
    settings.setValue("matrix_view.m11", param_matrixWorld.m11());
    settings.setValue("matrix_view.m12", param_matrixWorld.m12());
    settings.setValue("matrix_view.m13", param_matrixWorld.m13());
    settings.setValue("matrix_view.m21", param_matrixWorld.m21());
    settings.setValue("matrix_view.m22", param_matrixWorld.m22());
    settings.setValue("matrix_view.m23", param_matrixWorld.m23());
    settings.setValue("matrix_view.m31", param_matrixWorld.m31());
    settings.setValue("matrix_view.m32", param_matrixWorld.m32());
    settings.setValue("matrix_view.m33", param_matrixWorld.m33());
}


void DefaultViewPort::readSettings(QSettings& settings)
{
    qreal m11 = settings.value("matrix_view.m11", param_matrixWorld.m11()).toDouble();
    qreal m12 = settings.value("matrix_view.m12", param_matrixWorld.m12()).toDouble();
    qreal m13 = settings.value("matrix_view.m13", param_matrixWorld.m13()).toDouble();
    qreal m21 = settings.value("matrix_view.m21", param_matrixWorld.m21()).toDouble();
    qreal m22 = settings.value("matrix_view.m22", param_matrixWorld.m22()).toDouble();
    qreal m23 = settings.value("matrix_view.m23", param_matrixWorld.m23()).toDouble();
    qreal m31 = settings.value("matrix_view.m31", param_matrixWorld.m31()).toDouble();
    qreal m32 = settings.value("matrix_view.m32", param_matrixWorld.m32()).toDouble();
    qreal m33 = settings.value("matrix_view.m33", param_matrixWorld.m33()).toDouble();

    param_matrixWorld = QTransform(m11, m12, m13, m21, m22, m23, m31, m32, m33);
}


double DefaultViewPort::getRatio()
{
    return param_keepRatio;
}


void DefaultViewPort::setRatio(int flags)
{
    if (getRatio() == flags) //nothing to do
        return;

    //if valid flags
    if (flags == CV_WINDOW_FREERATIO || flags == CV_WINDOW_KEEPRATIO)
    {
        centralWidget->param_ratio_mode = flags;
        param_keepRatio = flags;
        updateGeometry();
        viewport()->update();
    }
}


void DefaultViewPort::updateImage(const CvArr* arr)
{
    CV_Assert(arr);

    CvMat* mat, stub;
    int origin = 0;

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

    mat = cvGetMat(arr, &stub);

    if (!image2Draw_mat || !CV_ARE_SIZES_EQ(image2Draw_mat, mat))
    {
        if (image2Draw_mat)
            cvReleaseMat(&image2Draw_mat);

        //the image in ipl (to do a deep copy with cvCvtColor)
        image2Draw_mat = cvCreateMat(mat->rows, mat->cols, CV_8UC3);
        image2Draw_qt = QImage(image2Draw_mat->data.ptr, image2Draw_mat->cols, image2Draw_mat->rows, image2Draw_mat->step, QImage::Format_RGB888);

        //use to compute mouse coordinate, I need to update the ratio here and in resizeEvent
        ratioX = width() / float(image2Draw_mat->cols);
        ratioY = height() / float(image2Draw_mat->rows);
        updateGeometry();
    }

    nbChannelOriginImage = cvGetElemType(mat);

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

    viewport()->update();
}


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

    infoText = text;
    if (delayms > 0) timerDisplay->start(delayms);
    drawInfo = true;
}


void DefaultViewPort::setOpenGlDrawCallback(CvOpenGlDrawCallback /*callback*/, void* /*userdata*/)
{
    CV_Error(CV_OpenGlNotSupported, "Window doesn't support OpenGL");
}


void DefaultViewPort::makeCurrentOpenGlContext()
{
    CV_Error(CV_OpenGlNotSupported, "Window doesn't support OpenGL");
}


void DefaultViewPort::updateGl()
{
    CV_Error(CV_OpenGlNotSupported, "Window doesn't support OpenGL");
}


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


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


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


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


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


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


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


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


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

        // Create a new pixmap to render the viewport into
        QPixmap viewportPixmap(viewport()->size());
        viewport()->render(&viewportPixmap);

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

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

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

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

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


void DefaultViewPort::contextMenuEvent(QContextMenuEvent* evnt)
{
    if (centralWidget->vect_QActions.size() > 0)
    {
        QMenu menu(this);

        foreach (QAction *a, centralWidget->vect_QActions)
            menu.addAction(a);

        menu.exec(evnt->globalPos());
    }
}


void DefaultViewPort::resizeEvent(QResizeEvent* evnt)
{
    controlImagePosition();

    //use to compute mouse coordinate, I need to update the ratio here and in resizeEvent
    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(evnt->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 = (evnt->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(evnt);
}


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


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

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

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

    QWidget::mousePressEvent(evnt);
}


void DefaultViewPort::mouseReleaseEvent(QMouseEvent* evnt)
{
    int cv_event = -1, flags = 0;
    QPoint pt = evnt->pos();

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

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

    QWidget::mouseReleaseEvent(evnt);
}


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

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

    QWidget::mouseDoubleClickEvent(evnt);
}


void DefaultViewPort::mouseMoveEvent(QMouseEvent* evnt)
{
    int cv_event = CV_EVENT_MOUSEMOVE, flags = 0;
    QPoint pt = evnt->pos();

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

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


void DefaultViewPort::paintEvent(QPaintEvent* evnt)
{
    QPainter myPainter(viewport());
    myPainter.setWorldTransform(param_matrixWorld);

    draw2D(&myPainter);

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

    //overlay pixel values if zoomed in far enough
    if (param_matrixWorld.m11()*ratioX >= threshold_zoom_img_region &&
        param_matrixWorld.m11()*ratioY >= threshold_zoom_img_region)
    {
        drawImgRegion(&myPainter);
    }

    //in mode zoom/panning
    if (param_matrixWorld.m11() > 1)
    {
        drawViewOverview(&myPainter);
    }

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

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

    QGraphicsView::paintEvent(evnt);
}


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


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


void DefaultViewPort::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 DefaultViewPort::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 DefaultViewPort::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();
}


//up, down, dclick, move
void DefaultViewPort::icvmouseHandler(QMouseEvent *evnt, type_mouse_event category, int &cv_event, int &flags)
{
    Qt::KeyboardModifiers modifiers = evnt->modifiers();
    Qt::MouseButtons buttons = evnt->buttons();

    flags = 0;
    if(modifiers & Qt::ShiftModifier)
        flags |= CV_EVENT_FLAG_SHIFTKEY;
    if(modifiers & Qt::ControlModifier)
        flags |= CV_EVENT_FLAG_CTRLKEY;
    if(modifiers & Qt::AltModifier)
        flags |= CV_EVENT_FLAG_ALTKEY;

    if(buttons & Qt::LeftButton)
        flags |= CV_EVENT_FLAG_LBUTTON;
    if(buttons & Qt::RightButton)
        flags |= CV_EVENT_FLAG_RBUTTON;
    if(buttons & Qt::MidButton)
        flags |= CV_EVENT_FLAG_MBUTTON;

    cv_event = CV_EVENT_MOUSEMOVE;
    switch(evnt->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 DefaultViewPort::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 DefaultViewPort::sizeHint() const
{
    if(image2Draw_mat)
        return QSize(image2Draw_mat->cols, image2Draw_mat->rows);
    else
        return QGraphicsView::sizeHint();
}


void DefaultViewPort::draw2D(QPainter *painter)
{
    image2Draw_qt = QImage(image2Draw_mat->data.ptr, image2Draw_mat->cols, image2Draw_mat->rows,image2Draw_mat->step,QImage::Format_RGB888);
    painter->drawImage(QRect(0,0,viewport()->width(),viewport()->height()), image2Draw_qt, QRect(0,0, image2Draw_qt.width(), image2Draw_qt.height()) );
}

//only if CV_8UC1 or CV_8UC3
void DefaultViewPort::drawStatusBar()
{
    if (nbChannelOriginImage!=CV_8UC1 && nbChannelOriginImage!=CV_8UC3)
        return;

    if (mouseCoordinate.x()>=0 &&
        mouseCoordinate.y()>=0 &&
        mouseCoordinate.x()<image2Draw_qt.width() &&
        mouseCoordinate.y()<image2Draw_qt.height())
//  if (mouseCoordinate.x()>=0 && mouseCoordinate.y()>=0)
    {
        QRgb rgbValue = image2Draw_qt.pixel(mouseCoordinate);

        if (nbChannelOriginImage==CV_8UC3 )
        {
            centralWidget->myStatusBar_msg->setText(tr("<font color='black'>(x=%1, y=%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'>(x=%1, y=%2) ~ </font>")
                .arg(mouseCoordinate.x())
                .arg(mouseCoordinate.y())+
                tr("<font color='grey'>L:%3 </font>").arg(qRed(rgbValue))
                );
        }
    }
}

//accept only CV_8UC1 and CV_8UC8 image for now
void DefaultViewPort::drawImgRegion(QPainter *painter)
{
    if (nbChannelOriginImage!=CV_8UC1 && nbChannelOriginImage!=CV_8UC3)
        return;

    double pixel_width = param_matrixWorld.m11()*ratioX;
    double pixel_height = param_matrixWorld.m11()*ratioY;

    qreal offsetX = param_matrixWorld.dx()/pixel_width;
    offsetX = offsetX - floor(offsetX);
    qreal offsetY = param_matrixWorld.dy()/pixel_height;
    offsetY = offsetY - floor(offsetY);

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

    QVarLengthArray<QLineF, 30> linesY;
    for (qreal _y = offsetY*pixel_height; _y < view.height(); _y += pixel_height )
        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(10+(pixel_height-threshold_zoom_img_region)/5);
    painter->setFont(f);


    for (int j=-1;j<height()/pixel_height;j++)//-1 because display the pixels top rows left columns
        for (int i=-1;i<width()/pixel_width;i++)//-1
        {
            // Calculate top left of the pixel's position in the viewport (screen space)
            QPointF pos_in_view((i+offsetX)*pixel_width, (j+offsetY)*pixel_height);

            // Calculate top left of the pixel's position in the image (image space)
            QPointF pos_in_image = matrixWorld_inv.map(pos_in_view);// Top left of pixel in view
            pos_in_image.rx() = pos_in_image.x()/ratioX;
            pos_in_image.ry() = pos_in_image.y()/ratioY;
            QPoint point_in_image(pos_in_image.x() + 0.5f,pos_in_image.y() + 0.5f);// Add 0.5 for rounding

            QRgb rgbValue;
            if (image2Draw_qt.valid(point_in_image))
                rgbValue = image2Draw_qt.pixel(point_in_image);
            else
                rgbValue = qRgb(0,0,0);

            if (nbChannelOriginImage==CV_8UC3)
            {
                //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);
                */
                QString val;

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

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

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

            }

            if (nbChannelOriginImage==CV_8UC1)
            {
                QString val = tr("%1").arg(qRed(rgbValue));
                painter->drawText(QRect(pos_in_view.x(),pos_in_view.y(),pixel_width,pixel_height),
                    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 DefaultViewPort::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 DefaultViewPort::drawInstructions(QPainter *painter)
{
    QFontMetrics metrics = QFontMetrics(font());
    int border = qMax(4, metrics.leading());

    QRect qrect = 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(), qrect.height() + 2*border),
        QColor(0, 0, 0, 127));
    painter->setPen(Qt::white);
    painter->fillRect(QRect(0, 0, width(), qrect.height() + 2*border),
        QColor(0, 0, 0, 127));

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


void DefaultViewPort::setSize(QSize /*size_*/)
{
}


//////////////////////////////////////////////////////
// OpenGlViewPort

#ifdef HAVE_QT_OPENGL

OpenGlViewPort::OpenGlViewPort(QWidget* _parent) : QGLWidget(_parent), size(-1, -1)
{
    mouseCallback = 0;
    mouseData = 0;

    glDrawCallback = 0;
    glDrawData = 0;
}

OpenGlViewPort::~OpenGlViewPort()
{
}

QWidget* OpenGlViewPort::getWidget()
{
    return this;
}

void OpenGlViewPort::setMouseCallBack(CvMouseCallback callback, void* param)
{
    mouseCallback = callback;
    mouseData = param;
}

void OpenGlViewPort::writeSettings(QSettings& /*settings*/)
{
}

void OpenGlViewPort::readSettings(QSettings& /*settings*/)
{
}

double OpenGlViewPort::getRatio()
{
    return (double)width() / height();
}

void OpenGlViewPort::setRatio(int /*flags*/)
{
}

void OpenGlViewPort::updateImage(const CvArr* /*arr*/)
{
}

void OpenGlViewPort::startDisplayInfo(QString /*text*/, int /*delayms*/)
{
}

void OpenGlViewPort::setOpenGlDrawCallback(CvOpenGlDrawCallback callback, void* userdata)
{
    glDrawCallback = callback;
    glDrawData = userdata;
}

void OpenGlViewPort::makeCurrentOpenGlContext()
{
    makeCurrent();
}

void OpenGlViewPort::updateGl()
{
    QGLWidget::updateGL();
}

void OpenGlViewPort::initializeGL()
{
    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}

void OpenGlViewPort::resizeGL(int w, int h)
{
    glViewport(0, 0, w, h);
}

void OpenGlViewPort::paintGL()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    if (glDrawCallback)
        glDrawCallback(glDrawData);
}

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

    icvmouseHandler(evnt, mouse_down, cv_event, flags);
    icvmouseProcessing(QPointF(pt), cv_event, flags);

    QGLWidget::mousePressEvent(evnt);
}


void OpenGlViewPort::mouseReleaseEvent(QMouseEvent* evnt)
{
    int cv_event = -1, flags = 0;
    QPoint pt = evnt->pos();

    icvmouseHandler(evnt, mouse_up, cv_event, flags);
    icvmouseProcessing(QPointF(pt), cv_event, flags);

    QGLWidget::mouseReleaseEvent(evnt);
}


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

    icvmouseHandler(evnt, mouse_dbclick, cv_event, flags);
    icvmouseProcessing(QPointF(pt), cv_event, flags);

    QGLWidget::mouseDoubleClickEvent(evnt);
}


void OpenGlViewPort::mouseMoveEvent(QMouseEvent* evnt)
{
    int cv_event = CV_EVENT_MOUSEMOVE, flags = 0;
    QPoint pt = evnt->pos();

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

    QGLWidget::mouseMoveEvent(evnt);
}

void OpenGlViewPort::icvmouseHandler(QMouseEvent* evnt, type_mouse_event category, int& cv_event, int& flags)
{
    Qt::KeyboardModifiers modifiers = evnt->modifiers();
    Qt::MouseButtons buttons = evnt->buttons();

    flags = 0;
    if (modifiers & Qt::ShiftModifier)
        flags |= CV_EVENT_FLAG_SHIFTKEY;
    if (modifiers & Qt::ControlModifier)
        flags |= CV_EVENT_FLAG_CTRLKEY;
    if (modifiers & Qt::AltModifier)
        flags |= CV_EVENT_FLAG_ALTKEY;

    if (buttons & Qt::LeftButton)
        flags |= CV_EVENT_FLAG_LBUTTON;
    if (buttons & Qt::RightButton)
        flags |= CV_EVENT_FLAG_RBUTTON;
    if (buttons & Qt::MidButton)
        flags |= CV_EVENT_FLAG_MBUTTON;

    cv_event = CV_EVENT_MOUSEMOVE;
    switch (evnt->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 OpenGlViewPort::icvmouseProcessing(QPointF pt, int cv_event, int flags)
{
    if (mouseCallback)
        mouseCallback(cv_event, pt.x(), pt.y(), flags, mouseData);
}


QSize OpenGlViewPort::sizeHint() const
{
    if (size.width() > 0 && size.height() > 0)
        return size;

    return QGLWidget::sizeHint();
}

void OpenGlViewPort::setSize(QSize size_)
{
    size = size_;
    updateGeometry();
}

#endif

#endif // HAVE_QT