New functions with QT GUI:

- save/load window parameters implemented !

modules/highgui/include/opencv2/highgui/highgui.hpp

@@ -67,6 +67,8 @@ CV_EXPORTS double getWindowProperty(const string& winname, int prop_id);//YV
 //Only for QT
 CV_EXPORTS void displayOverlay(const string& winname, const string& text, int delayms);
 CV_EXPORTS void displayStatusBar(const string& winname, const string& text, int delayms);
+CV_EXPORTS void saveWindowParameters(const string& windowName);
+CV_EXPORTS void loadWindowParameters(const string& windowName);
 CV_EXPORTS  int startLoop(int (*pt2Func)(int argc, char *argv[]), int argc, char* argv[]);
 CV_EXPORTS  void stopLoop();
 

modules/highgui/include/opencv2/highgui/highgui_c.h

@@ -60,6 +60,8 @@ extern "C" {
 //-----------New for QT
 CVAPI(void) cvDisplayOverlay(const char* name, const char* text, int delayms);
 CVAPI(void) cvDisplayStatusBar(const char* name, const char* text, int delayms);
+CVAPI(void) cvSaveWindowParameters(const char* name);
+CVAPI(void) cvLoadWindowParameters(const char* name);
 CVAPI(int) cvStartLoop(int (*pt2Func)(int argc, char *argv[]), int argc, char* argv[]);
 CVAPI(void) cvStopLoop();
 //----------------------

modules/highgui/src/window.cpp

@@ -160,6 +160,16 @@ int waitKey(int delay)
     return cvWaitKey(delay);
 }
 
+void saveWindowParameters(const string& windowName)
+{
+	cvSaveWindowParameters(windowName.c_str());
+}
+
+void loadWindowParameters(const string& windowName)
+{
+	cvLoadWindowParameters(windowName.c_str());
+}
+
 int createTrackbar(const string& trackbarName, const string& winName,
                    int* value, int count, TrackbarCallback callback,
                    void* userdata)

modules/highgui/src/window_QT.cpp

@@ -42,7 +42,6 @@
 #ifdef HAVE_QT
 
 #include <window_QT.h>
-#include <QVarLengthArray>
 
 //Static and global first
 static GuiReceiver guiMainThread;
@@ -132,6 +131,22 @@ CV_IMPL void cvDisplayOverlay(const char* name, const char* text, int delayms)
                          
 }
 
+CV_IMPL void cvSaveWindowParameters(const char* name)
+{
+    QMetaObject::invokeMethod(&guiMainThread,
+			      "saveWindowParameters",
+			      Qt::AutoConnection,
+			      Q_ARG(QString, QString(name)));
+}
+
+CV_IMPL void cvLoadWindowParameters(const char* name)
+{
+    QMetaObject::invokeMethod(&guiMainThread,
+			      "loadWindowParameters",
+			      Qt::AutoConnection,
+			      Q_ARG(QString, QString(name)));
+}
+
 CV_IMPL void cvDisplayStatusBar(const char* name, const char* text, int delayms)
 {
 
@@ -235,7 +250,7 @@ CV_IMPL CvWindow* icvFindWindowByName( const char* arg )
     foreach (QWidget *widget, QApplication::topLevelWidgets())
     {
         w = (CvWindow*) widget;
-        if (w->name==name)
+        if (w->param_name==name)
         {
             window = w;
             break;
@@ -259,7 +274,8 @@ CvTrackbar* icvFindTrackbarByName( const char* name_trackbar, const char* name_w
     QPointer<CvTrackbar> t;
 
     //Warning   ----  , asume the location 0 is myview and max-1 the status bar
-    for (int i = 1; i < w->layout->layout()->count()-2; ++i)
+    //done three times in the code, in loadtrackbars, savetrackbar and in findtrackbar
+    for (int i = 1; i < w->layout->layout()->count()-1; ++i)
     {
 
         t = (CvTrackbar*) w->layout->layout()->itemAt(i);
@@ -467,6 +483,22 @@ GuiReceiver::GuiReceiver() : _bTimeOut(false)
     qApp->setQuitOnLastWindowClosed ( false );//maybe the user would like to access this setting
 }
 
+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() );
@@ -504,7 +536,7 @@ double GuiReceiver::getPropWindow(QString name)
     if (!w)
         return -1;
 
-    return (double)w->flags;
+    return (double)w->param_flags;
 }
 
 void GuiReceiver::setPropWindow(QString name, double arg2 )
@@ -516,7 +548,7 @@ void GuiReceiver::setPropWindow(QString name, double arg2 )
 
     int flags = (int) arg2;
 
-    if (w->flags == flags)//nothing to do
+    if (w->param_flags == flags)//nothing to do
         return;
 
 
@@ -524,11 +556,11 @@ void GuiReceiver::setPropWindow(QString name, double arg2 )
     {
     case  CV_WINDOW_NORMAL:
         w->layout->setSizeConstraint(QLayout::SetMinAndMaxSize);
-        w->flags = flags;
+        w->param_flags = flags;
         break;
     case  CV_WINDOW_AUTOSIZE:
         w->layout->setSizeConstraint(QLayout::SetFixedSize);
-        w->flags = flags;
+        w->param_flags = flags;
         break;
     default:;
     }
@@ -796,13 +828,13 @@ CvTrackbar::~CvTrackbar()
 CvWindow::CvWindow(QString arg, int arg2)
 {
     moveToThread(qApp->instance()->thread());
-    name = arg;
-    flags = arg2;
+    param_name = arg;
+    param_flags = arg2;
 
     setAttribute(Qt::WA_DeleteOnClose);//in other case, does not release memory
     setContentsMargins(0,0,0,0);
-    setWindowTitle(name);
-    setObjectName(name);
+    setWindowTitle(param_name);
+    setObjectName(param_name);
 
     resize(400,300);
 
@@ -811,22 +843,20 @@ CvWindow::CvWindow(QString arg, int arg2)
     myview->setAlignment(Qt::AlignHCenter);
 
 
-    shortcut_r_Zoom = new QShortcut(Qt::CTRL + Qt::Key_P, this);
-    QObject::connect( shortcut_r_Zoom, SIGNAL( activated ()),myview, SLOT( resetZoom( ) ));
-    shortcut_imgRegion = new QShortcut(Qt::CTRL + Qt::Key_O, this);
-    QObject::connect( shortcut_imgRegion, SIGNAL( activated ()),myview, SLOT( imgRegion( ) ));
-    shortcut_Plus = new QShortcut(QKeySequence(QKeySequence::ZoomIn), this);
-    QObject::connect( shortcut_Plus, SIGNAL( activated ()),myview, SLOT( ZoomIn() ));
-    shortcut_Minus = new QShortcut(QKeySequence(QKeySequence::ZoomOut), this);
-    QObject::connect(shortcut_Minus, SIGNAL( activated ()),myview, SLOT( ZoomOut() ));
-    shortcut_Left = new QShortcut(Qt::CTRL + Qt::Key_Left, this);
-    QObject::connect( shortcut_Left, SIGNAL( activated ()),myview, SLOT( siftWindowOnLeft() ));
-    shortcut_Right = new QShortcut(Qt::CTRL + Qt::Key_Right, this);
-    QObject::connect( shortcut_Right, SIGNAL( activated ()),myview, SLOT( siftWindowOnRight() ));
-    shortcut_Up = new QShortcut(Qt::CTRL + Qt::Key_Up, this);
-    QObject::connect(shortcut_Up, SIGNAL( activated ()),myview, SLOT( siftWindowOnUp() ));
-    shortcut_Down = new QShortcut(Qt::CTRL + Qt::Key_Down, this);
-    QObject::connect(shortcut_Down, SIGNAL( activated ()),myview, SLOT( siftWindowOnDown() ));
+    shortcutZ = new QShortcut(Qt::CTRL + Qt::Key_P, this);
+    QObject::connect( shortcutZ, SIGNAL( activated ()),myview, SLOT( resetZoom( ) ));
+    shortcutPlus = new QShortcut(QKeySequence(QKeySequence::ZoomIn), this);
+    QObject::connect( shortcutPlus, SIGNAL( activated ()),myview, SLOT( ZoomIn() ));
+    shortcutMinus = new QShortcut(QKeySequence(QKeySequence::ZoomOut), this);
+    QObject::connect(shortcutMinus, SIGNAL( activated ()),myview, SLOT( ZoomOut() ));
+    shortcutLeft = new QShortcut(Qt::CTRL + Qt::Key_Left, this);
+    QObject::connect( shortcutLeft, SIGNAL( activated ()),myview, SLOT( siftWindowOnLeft() ));
+    shortcutRight = new QShortcut(Qt::CTRL + Qt::Key_Right, this);
+    QObject::connect( shortcutRight, SIGNAL( activated ()),myview, SLOT( siftWindowOnRight() ));
+    shortcutUp = new QShortcut(Qt::CTRL + Qt::Key_Up, this);
+    QObject::connect(shortcutUp, SIGNAL( activated ()),myview, SLOT( siftWindowOnUp() ));
+    shortcutDown = new QShortcut(Qt::CTRL + Qt::Key_Down, this);
+    QObject::connect(shortcutDown, SIGNAL( activated ()),myview, SLOT( siftWindowOnDown() ));
 
     layout = new QBoxLayout(QBoxLayout::TopToBottom);
     //layout = new CustomLayout;
@@ -837,7 +867,7 @@ CvWindow::CvWindow(QString arg, int arg2)
     layout->addWidget(myview,Qt::AlignCenter);
     //layout->addStretch(0);
 
-    if (flags == CV_WINDOW_AUTOSIZE)
+    if (param_flags == CV_WINDOW_AUTOSIZE)
 	layout->setSizeConstraint(QLayout::SetFixedSize);
 
     //now status bar
@@ -874,14 +904,13 @@ CvWindow::~CvWindow()
     delete myBar_msg;
 
 
-    delete shortcut_r_Zoom;
-    delete shortcut_imgRegion;
-    delete shortcut_Plus;
-    delete shortcut_Minus;
-    delete shortcut_Left;
-    delete shortcut_Right;
-    delete shortcut_Up;
-    delete shortcut_Down;
+    delete shortcutZ;
+    delete shortcutPlus;
+    delete shortcutMinus;
+    delete shortcutLeft;
+    delete shortcutRight;
+    delete shortcutUp;
+    delete shortcutDown;
 }
 
 ViewPort* CvWindow::getView()
@@ -950,28 +979,103 @@ void CvWindow::keyPressEvent(QKeyEvent *event)
 }
 
 
-void CvWindow::readSettings()//not tested
+void CvWindow::readSettings()
 {
-    QSettings settings("Trolltech", "Application Example");
+	//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();
+    qreal m11 = settings.value("matrix_view.m11",myview->param_matrixWorld.m11()).toReal();
+    qreal m12 = settings.value("matrix_view.m12",myview->param_matrixWorld.m12()).toReal();
+    qreal m13 = settings.value("matrix_view.m13",myview->param_matrixWorld.m13()).toReal();
+    qreal m21 = settings.value("matrix_view.m21",myview->param_matrixWorld.m21()).toReal();
+    qreal m22 = settings.value("matrix_view.m22",myview->param_matrixWorld.m22()).toReal();
+    qreal m23 = settings.value("matrix_view.m23",myview->param_matrixWorld.m23()).toReal();
+    qreal m31 = settings.value("matrix_view.m31",myview->param_matrixWorld.m31()).toReal();
+    qreal m32 = settings.value("matrix_view.m32",myview->param_matrixWorld.m32()).toReal();
+    qreal m33 = settings.value("matrix_view.m33",myview->param_matrixWorld.m33()).toReal();
+    myview->param_matrixWorld = QTransform(m11,m12,m13,m21,m22,m23,m31,m32,m33);
+
+    //trackbar here
+    icvLoadTrackbars(&settings);
+
     resize(size);
     move(pos);
 }
 
-void CvWindow::writeSettings()//not tested
+void CvWindow::writeSettings()
 {
-    QSettings settings("Trolltech", "Application Example");
+	//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("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);
 }
 
+void CvWindow::icvLoadTrackbars(QSettings *settings)
+{
+    int size = settings->beginReadArray("trackbars");
+    QPointer<CvTrackbar> t;
+    //Warning   ----  , asume the location 0 is myview and max-1 the status bar
+    //done three times in the code, in loadtrackbars, savetrackbar and in findtrackbar
+
+    //trackbar are saved in the same order, so no need to use icvFindTrackbarByName
+    if (layout->layout()->count()-2 == 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*)  layout->layout()->itemAt(i+1);//+1 because index 0 is myview (see Warning)
+		
+			if (t->trackbar_name == settings->value("name").toString())
+			{
+			    t->slider->setValue(settings->value("value").toInt());
+			}
+	    }
+    settings->endArray();
+
+}
+
+void CvWindow::icvSaveTrackbars(QSettings *settings)
+{
+    QPointer<CvTrackbar> t;
+
+    //Warning   ----  , asume the location 0 is myview and max-1 the status bar
+    //done three times in the code, in loadtrackbars, savetrackbar and in findtrackbar
+    settings->beginWriteArray("trackbars");
+    for (int i = 0; i < layout->layout()->count()-2; ++i) {
+	t = (CvTrackbar*)  layout->layout()->itemAt(i+1);//+1 because index 0 is myview (see Warning)
+	settings->setArrayIndex(i);
+	settings->setValue("name", t->trackbar_name);
+	settings->setValue("value", t->slider->value());
+    }
+    settings->endArray();
+}
+
+
+
 //Here is ViewPort
 ViewPort::ViewPort(CvWindow* arg, int arg2, int arg3)
 {
     centralWidget = arg,
-    mode = arg2;
-    keepRatio = arg3;
+    mode_display = arg2;
+    param_keepRatio = arg3;
 
     setupViewport(centralWidget);
     setContentsMargins(0,0,0,0);
@@ -988,7 +1092,7 @@ ViewPort::ViewPort(CvWindow* arg, int arg2, int arg3)
 
 
 #if defined(OPENCV_GL)
-    if (mode == CV_MODE_OPENGL)
+    if ( mode_display == CV_MODE_OPENGL)
     {
 	setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
 	initGL();
@@ -1013,62 +1117,57 @@ ViewPort::~ViewPort()
 
 void ViewPort::setRatio(int flags)
 {
-    keepRatio = flags;
+    param_keepRatio = flags;
     updateGeometry();
     viewport()->update();
 }
 
 int ViewPort::getRatio()
 {
-    return keepRatio;
+    return param_keepRatio;
 }
 
 void ViewPort::resetZoom()
 {
-    matrixWorld.reset();
+    param_matrixWorld.reset();
     controlImagePosition();
 }
 
-void ViewPort::imgRegion( )
-{
-	scaleView(threshold_zoom_img_region/matrixWorld.m11(), QPointF(size().width()/2,size().height()/2),false);//false = do not process the 1st param 
-}
-
 void ViewPort::ZoomIn()
 {
-    scaleView( 0.5,QPointF(size().width()/2,size().height()/2),true);
+    scaleView( 0.5,QPointF(size().width()/2,size().height()/2));
 }
 
 void ViewPort::ZoomOut()
 {
-    scaleView( -0.5,QPointF(size().width()/2,size().height()/2),true);
+    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*matrixWorld.m11());
+    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*matrixWorld.m11());
+    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*matrixWorld.m11());
+    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*matrixWorld.m11());
+    float delta = -2*height()/(100.0*param_matrixWorld.m11());
     moveView(QPointF(0,delta));
 }
 
@@ -1125,30 +1224,30 @@ void ViewPort::controlImagePosition()
     qreal left, top, right, bottom;
 
     //after check top-left, bottom right corner to avoid getting "out" during zoom/panning
-    matrixWorld.map(0,0,&left,&top);
+    param_matrixWorld.map(0,0,&left,&top);
 
     if (left > 0)
     {
-	matrixWorld.translate(-left,0);
+	param_matrixWorld.translate(-left,0);
 	left = 0;
     }
     if (top > 0)
     {
-	matrixWorld.translate(0,-top);
+	param_matrixWorld.translate(0,-top);
 	top = 0;
     }
     //-------
 
     QSize sizeImage = size();
-    matrixWorld.map(sizeImage.width(),sizeImage.height(),&right,&bottom);
+    param_matrixWorld.map(sizeImage.width(),sizeImage.height(),&right,&bottom);
     if (right < sizeImage.width())
     {
-	matrixWorld.translate(sizeImage.width()-right,0);
+	param_matrixWorld.translate(sizeImage.width()-right,0);
 	right = sizeImage.width();
     }
     if (bottom < sizeImage.height())
     {
-	matrixWorld.translate(0,sizeImage.height()-bottom);
+	param_matrixWorld.translate(0,sizeImage.height()-bottom);
 	bottom = sizeImage.height();
     }
 
@@ -1156,51 +1255,48 @@ void ViewPort::controlImagePosition()
     positionCorners.setTopLeft(QPoint(left,top));
     positionCorners.setBottomRight(QPoint(right,bottom));
     //save also the inv matrix
-    matrixWorld_inv = matrixWorld.inverted();
+    matrixWorld_inv = param_matrixWorld.inverted();
 
     viewport()->update();
 }
 
 void ViewPort::moveView(QPointF delta)
 {
-    matrixWorld.translate(delta.x(),delta.y());
+    param_matrixWorld.translate(delta.x(),delta.y());
     controlImagePosition();
 }
 
 //factor is -0.5 (zoom out) or 0.5 (zoom in)
-void ViewPort::scaleView(qreal factor,QPointF center,bool process_factor)
+void ViewPort::scaleView(qreal factor,QPointF center)
 {
-	if (process_factor)
-	{
     factor/=5;//-0.1 <-> 0.1
     factor+=1;//0.9 <-> 1.1
-	}
 
     //limit zoom out ---
-    if (matrixWorld.m11()==1 && factor < 1)
+    if (param_matrixWorld.m11()==1 && factor < 1)
 	return;
 
-    if (matrixWorld.m11()*factor<1)
-	factor = 1/matrixWorld.m11();
+    if (param_matrixWorld.m11()*factor<1)
+	factor = 1/param_matrixWorld.m11();
 
 
     //limit zoom int ---
-    if (matrixWorld.m11()>100 && factor > 1)
+    if (param_matrixWorld.m11()>100 && factor > 1)
 	return;
 
     //inverse the transform
     int a, b;
     matrixWorld_inv.map(center.x(),center.y(),&a,&b);
 
-    matrixWorld.translate(a-factor*a,b-factor*b);
-    matrixWorld.scale(factor,factor);
+    param_matrixWorld.translate(a-factor*a,b-factor*b);
+    param_matrixWorld.scale(factor,factor);
 
     controlImagePosition();
 
     //display new zoom
-    centralWidget->displayStatusBar(tr("Zoom: %1%").arg(matrixWorld.m11()*100),1000);
+    centralWidget->displayStatusBar(tr("Zoom: %1%").arg(param_matrixWorld.m11()*100),1000);
 
-    if (matrixWorld.m11()>1)
+    if (param_matrixWorld.m11()>1)
 	setCursor(Qt::OpenHandCursor);
     else
 	unsetCursor();
@@ -1208,7 +1304,7 @@ void ViewPort::scaleView(qreal factor,QPointF center,bool process_factor)
 
 void ViewPort::wheelEvent(QWheelEvent *event)
 {
-    scaleView( -event->delta() / 240.0,event->pos(),true);//true means process the 1st parameter
+    scaleView( -event->delta() / 240.0,event->pos());
 }
 
 void ViewPort::mousePressEvent(QMouseEvent *event)
@@ -1220,7 +1316,7 @@ void ViewPort::mousePressEvent(QMouseEvent *event)
     icvmouseHandler(event, mouse_down, cv_event, flags);
     icvmouseProcessing(QPointF(pt), cv_event, flags);
 
-    if (matrixWorld.m11()>1)
+    if (param_matrixWorld.m11()>1)
     {
 	setCursor(Qt::ClosedHandCursor);
 	positionGrabbing = event->pos();
@@ -1239,7 +1335,7 @@ void ViewPort::mouseReleaseEvent(QMouseEvent *event)
     icvmouseHandler(event, mouse_up, cv_event, flags);
     icvmouseProcessing(QPointF(pt), cv_event, flags);
 
-    if (matrixWorld.m11()>1)
+    if (param_matrixWorld.m11()>1)
 	setCursor(Qt::OpenHandCursor);
 
     QWidget::mouseReleaseEvent(event);
@@ -1267,9 +1363,9 @@ void ViewPort::mouseMoveEvent(QMouseEvent *event)
     icvmouseProcessing(QPointF(pt), cv_event, flags);
 
 
-    if (matrixWorld.m11()>1 && event->buttons() == Qt::LeftButton)
+    if (param_matrixWorld.m11()>1 && event->buttons() == Qt::LeftButton)
     {
-	QPointF dxy = (pt - positionGrabbing)/matrixWorld.m11();
+	QPointF dxy = (pt - positionGrabbing)/param_matrixWorld.m11();
 
 	positionGrabbing = event->pos();
 
@@ -1357,7 +1453,7 @@ void ViewPort::resizeEvent ( QResizeEvent *event)
     ratioX=width()/float(image2Draw_ipl->width);
     ratioY=height()/float(image2Draw_ipl->height);
 
-    if(keepRatio == CV_WINDOW_KEEPRATIO)//to keep the same aspect ratio
+    if(param_keepRatio == CV_WINDOW_KEEPRATIO)//to keep the same aspect ratio
     {
 	QSize newSize = QSize(image2Draw_ipl->width,image2Draw_ipl->height);
 	newSize.scale(event->size(),Qt::KeepAspectRatio);
@@ -1382,13 +1478,13 @@ void ViewPort::resizeEvent ( QResizeEvent *event)
 void ViewPort::paintEvent(QPaintEvent* event)
 {
     QPainter myPainter(viewport());
-    myPainter.setWorldTransform(matrixWorld);
+    myPainter.setWorldTransform(param_matrixWorld);
 
     draw2D(&myPainter);
 
 
 #if defined(OPENCV_GL)
-    if (mode == CV_MODE_OPENGL && false)//disable it for now
+    if ( mode_display == CV_MODE_OPENGL && false)//disable it for now
     {
 	setGL(this->width(),this->height());
 	draw3D();
@@ -1397,12 +1493,12 @@ void ViewPort::paintEvent(QPaintEvent* event)
 #endif
 
     //in mode zoom/panning
-    if (matrixWorld.m11()>1)
+    if (param_matrixWorld.m11()>1)
     {
 
 	myPainter.setWorldMatrixEnabled (false );
 
-	if (matrixWorld.m11()>=threshold_zoom_img_region)
+	if (param_matrixWorld.m11()>=threshold_zoom_img_region)
 	    drawImgRegion(&myPainter);
 
 	drawViewOverview(&myPainter);
@@ -1463,23 +1559,23 @@ void ViewPort::drawStatusBar()
 
 void ViewPort::drawImgRegion(QPainter *painter)
 {
-    qreal offsetX = matrixWorld.dx()/matrixWorld.m11();
+    qreal offsetX = param_matrixWorld.dx()/param_matrixWorld.m11();
     offsetX = offsetX - floor(offsetX);
-    qreal offsetY = matrixWorld.dy()/matrixWorld.m11();
+    qreal offsetY = param_matrixWorld.dy()/param_matrixWorld.m11();
     offsetY = offsetY - floor(offsetY);
 
     QSize view = size();
     QVarLengthArray<QLineF, 30> linesX;
-    for (qreal x = offsetX*matrixWorld.m11(); x < view.width(); x += matrixWorld.m11() )
+    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*matrixWorld.m11(); y < view.height(); y += matrixWorld.m11() )
+    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();
-    f.setPointSize(threshold_zoom_img_region/3+(matrixWorld.m11()-threshold_zoom_img_region)/6);
+    f.setPixelSize(6+(param_matrixWorld.m11()-threshold_zoom_img_region)/5);
     //f.setStretch(0);
     painter->setFont(f);
     QString val;
@@ -1489,11 +1585,11 @@ void ViewPort::drawImgRegion(QPainter *painter)
     QPointF point2;//idem
 
 
-    for (int j=-1;j<view.height()/matrixWorld.m11();j++)
-	for (int i=-1;i<view.width()/matrixWorld.m11();i++)
+    for (int j=-1;j<view.height()/param_matrixWorld.m11();j++)
+	for (int i=-1;i<view.width()/param_matrixWorld.m11();i++)
 	{
-	point1.setX((i+offsetX)*matrixWorld.m11());
-	point1.setY((j+offsetY)*matrixWorld.m11());
+	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());
 
@@ -1502,22 +1598,21 @@ void ViewPort::drawImgRegion(QPainter *painter)
 	else
 	    rgbValue = qRgb(0,0,0);
 
-	const int margin = 1; 
 	if (nbChannelOriginImage==3)
 	{
 	    val = tr("%1").arg(qRed(rgbValue));
 	    painter->setPen(QPen(Qt::red, 1));
-	    painter->drawText(QRect(point1.x(),point1.y()+margin,matrixWorld.m11(),matrixWorld.m11()/3),
+	    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()+matrixWorld.m11()/3+margin,matrixWorld.m11(),matrixWorld.m11()/3),
+	    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*matrixWorld.m11()/3+margin,matrixWorld.m11(),matrixWorld.m11()/3),
+	    painter->drawText(QRect(point1.x(),point1.y()+2*param_matrixWorld.m11()/3,param_matrixWorld.m11(),param_matrixWorld.m11()/3),
 			      Qt::AlignCenter, val);
 
 	}
@@ -1525,7 +1620,7 @@ void ViewPort::drawImgRegion(QPainter *painter)
 	{
 
 	    val = tr("%1").arg(qRed(rgbValue));
-	    painter->drawText(QRect(point1.x(),point1.y(),matrixWorld.m11(),matrixWorld.m11()),
+	    painter->drawText(QRect(point1.x(),point1.y(),param_matrixWorld.m11(),param_matrixWorld.m11()),
 			      Qt::AlignCenter, val);
 	}
     }
@@ -1549,7 +1644,7 @@ void ViewPort::drawViewOverview(QPainter *painter)
     painter->drawRect(QRect(width()-viewSize.width()-margin, 0,viewSize.width(),viewSize.height()));
 
     //daw the view's location inside the image
-    qreal ratioSize = 1/matrixWorld.m11();
+    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,

modules/highgui/src/window_QT.h

@@ -69,6 +69,7 @@
 #include <QIODevice>
 #include <QShortcut>
 #include <QStatusBar>
+#include <QVarLengthArray>
 
 //Macro here
 #define CV_MODE_NORMAL   0
@@ -109,6 +110,8 @@ public slots:
     void setPropWindow(QString name, double flags );
     double getRatioWindow(QString name);
     void setRatioWindow(QString name, double arg2 );
+    void saveWindowParameters(QString name);
+    void loadWindowParameters(QString name);
 };
 
 class CvTrackbar : public QHBoxLayout
@@ -133,6 +136,7 @@ private:
     CvTrackbarCallback callback;
     QPointer<CvWindow> parent;
     int* dataSlider;
+
 };
 
 class CvWindow : public QWidget
@@ -146,37 +150,39 @@ public:
     void updateImage(void* arr);
     void displayInfo(QString text, int delayms );
     void displayStatusBar(QString text, int delayms );
+    void readSettings();
+    void writeSettings();
     ViewPort* getView();
 
-    QString name;
-    int flags;
     QPointer<QBoxLayout> layout;
     QPointer<QStatusBar> myBar;
     QPointer<QLabel> myBar_msg;
-    //QPointer<CustomLayout> layout;
 
-protected:
-    void readSettings();
-    void writeSettings();
+    //parameters (will be save/load)
+    QString param_name;
+    int param_flags;
+
 
+protected:
     virtual void keyPressEvent(QKeyEvent *event);
 
 private:
     QPointer<ViewPort> myview;
-
-    int status;//0 normal, 1 fullscreen (YV)
-    QPointer<QShortcut> shortcut_r_Zoom;
-    QPointer<QShortcut> shortcut_imgRegion;
-    QPointer<QShortcut> shortcut_Plus;
-    QPointer<QShortcut> shortcut_Minus;
-    QPointer<QShortcut> shortcut_Left;
-    QPointer<QShortcut> shortcut_Right;
-    QPointer<QShortcut> shortcut_Up;
-    QPointer<QShortcut> shortcut_Down;
+    QPointer<QShortcut> shortcutZ;
+    QPointer<QShortcut> shortcutPlus;
+    QPointer<QShortcut> shortcutMinus;
+    QPointer<QShortcut> shortcutLeft;
+    QPointer<QShortcut> shortcutRight;
+    QPointer<QShortcut> shortcutUp;
+    QPointer<QShortcut> shortcutDown;
+
+    void icvLoadTrackbars(QSettings *settings);
+    void icvSaveTrackbars(QSettings *settings);
 };
 
 
 
+
 enum type_mouse_event {mouse_up = 0, mouse_down = 1, mouse_dbclick = 2, mouse_move = 3};
 
 static const int tableMouseButtons[][3]={
@@ -186,6 +192,7 @@ static const int tableMouseButtons[][3]={
     {CV_EVENT_MOUSEMOVE,CV_EVENT_MOUSEMOVE,CV_EVENT_MOUSEMOVE}		    	//mouse_move
 };
 
+
 class ViewPort : public QGraphicsView
 {
     Q_OBJECT
@@ -195,20 +202,24 @@ public:
     void updateImage(void* arr);
     void startDisplayInfo(QString text, int delayms);
     void setMouseCallBack(CvMouseCallback m, void* param);
+    int getRatio();
+    void setRatio(int arg);
+
+    //parameters (will be save/load)
+    QTransform param_matrixWorld;
+
+    int param_keepRatio;
 
     IplImage* image2Draw_ipl;
     QImage image2Draw_qt;
+    int mode_display;//opengl or native
     int nbChannelOriginImage;
-    void setRatio(int flags);
-	int getRatio();
-
 
 public slots:
     //reference:
     //http://www.qtcentre.org/wiki/index.php?title=QGraphicsView:_Smooth_Panning_and_Zooming
     //http://doc.qt.nokia.com/4.6/gestures-imagegestures-imagewidget-cpp.html
-    void scaleView(qreal scaleFactor, QPointF center, bool process1stParam);
-    void imgRegion( );
+    void scaleView(qreal scaleFactor, QPointF center);
     void moveView(QPointF delta);
     void resetZoom();
     void ZoomIn();
@@ -220,21 +231,14 @@ public slots:
     void resizeEvent ( QResizeEvent * );
 
 private:
-    QPoint deltaOffset;
-    QPoint computeOffset();
     QPoint mouseCoordinate;
     QPointF positionGrabbing;
     QRect  positionCorners;
-    QTransform matrixWorld;
     QTransform matrixWorld_inv;
     float ratioX, ratioY;
-
     CvMouseCallback on_mouse;
     void* on_mouse_param;
 
-    int mode;
-    int keepRatio;
-
     bool isSameSize(IplImage* img1,IplImage* img2);
     QSize sizeHint() const;
     QPointer<CvWindow> centralWidget;
@@ -270,64 +274,66 @@ private slots:
     void stopDisplayInfo();
 };
 
+
+
 //here css for trackbar
 /* from http://thesmithfam.org/blog/2010/03/10/fancy-qslider-stylesheet */
 static const QString str_Trackbar_css = QString("")
-+										"QSlider::groove:horizontal {"
-+										"border: 1px solid #bbb;"
-+										"background: white;"
-+										"height: 10px;"
-+										"border-radius: 4px;"
-+										"}"
-
-+										"QSlider::sub-page:horizontal {"
-+										"background: qlineargradient(x1: 0, y1: 0,    x2: 0, y2: 1,"
-+										"stop: 0 #66e, stop: 1 #bbf);"
-+										"background: qlineargradient(x1: 0, y1: 0.2, x2: 1, y2: 1,"
-+										"stop: 0 #bbf, stop: 1 #55f);"
-+										"border: 1px solid #777;"
-+										"height: 10px;"
-+										"border-radius: 4px;"
-+										"}"
-
-+										"QSlider::add-page:horizontal {"
-+										"background: #fff;"
-+										"border: 1px solid #777;"
-+										"height: 10px;"
-+										"border-radius: 4px;"
-+										"}"
-
-+										"QSlider::handle:horizontal {"
-+										"background: qlineargradient(x1:0, y1:0, x2:1, y2:1,"
-+										"stop:0 #eee, stop:1 #ccc);"
-+										"border: 1px solid #777;"
-+										"width: 13px;"
-+										"margin-top: -2px;"
-+										"margin-bottom: -2px;"
-+										"border-radius: 4px;"
-+										"}"
-
-+										"QSlider::handle:horizontal:hover {"
-+										"background: qlineargradient(x1:0, y1:0, x2:1, y2:1,"
-+										"stop:0 #fff, stop:1 #ddd);"
-+										"border: 1px solid #444;"
-+										"border-radius: 4px;"
-+										"}"
-
-+										"QSlider::sub-page:horizontal:disabled {"
-+										"background: #bbb;"
-+										"border-color: #999;"
-+										"}"
-
-+										"QSlider::add-page:horizontal:disabled {"
-+										"background: #eee;"
-+										"border-color: #999;"
-+										"}"
-
-+										"QSlider::handle:horizontal:disabled {"
-+										"background: #eee;"
-+										"border: 1px solid #aaa;"
-+										"border-radius: 4px;"
-+										"}";
+					+										"QSlider::groove:horizontal {"
+					+										"border: 1px solid #bbb;"
+					+										"background: white;"
+					+										"height: 10px;"
+					+										"border-radius: 4px;"
+					+										"}"
+
+					+										"QSlider::sub-page:horizontal {"
+					+										"background: qlineargradient(x1: 0, y1: 0,    x2: 0, y2: 1,"
+					+										"stop: 0 #66e, stop: 1 #bbf);"
+					+										"background: qlineargradient(x1: 0, y1: 0.2, x2: 1, y2: 1,"
+					+										"stop: 0 #bbf, stop: 1 #55f);"
+					+										"border: 1px solid #777;"
+					+										"height: 10px;"
+					+										"border-radius: 4px;"
+					+										"}"
+
+					+										"QSlider::add-page:horizontal {"
+					+										"background: #fff;"
+					+										"border: 1px solid #777;"
+					+										"height: 10px;"
+					+										"border-radius: 4px;"
+					+										"}"
+
+					+										"QSlider::handle:horizontal {"
+					+										"background: qlineargradient(x1:0, y1:0, x2:1, y2:1,"
+					+										"stop:0 #eee, stop:1 #ccc);"
+					+										"border: 1px solid #777;"
+					+										"width: 13px;"
+					+										"margin-top: -2px;"
+					+										"margin-bottom: -2px;"
+					+										"border-radius: 4px;"
+					+										"}"
+
+					+										"QSlider::handle:horizontal:hover {"
+					+										"background: qlineargradient(x1:0, y1:0, x2:1, y2:1,"
+					+										"stop:0 #fff, stop:1 #ddd);"
+					+										"border: 1px solid #444;"
+					+										"border-radius: 4px;"
+					+										"}"
+
+					+										"QSlider::sub-page:horizontal:disabled {"
+					+										"background: #bbb;"
+					+										"border-color: #999;"
+					+										"}"
+
+					+										"QSlider::add-page:horizontal:disabled {"
+					+										"background: #eee;"
+					+										"border-color: #999;"
+					+										"}"
+
+					+										"QSlider::handle:horizontal:disabled {"
+					+										"background: #eee;"
+					+										"border: 1px solid #aaa;"
+					+										"border-radius: 4px;"
+					+										"}";
 
 #endif