diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7358fb17c..3a6210759 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -519,13 +519,15 @@ if (WITH_QT)
 		add_definitions(-DHAVE_QT)#We need to define te macro this way, using cvconfig.h.cmake does not work
 
         find_package (OpenGL QUIET)
-		#if (NOT WIN32)	#WIN32 always detect OpenGL, so I disabled it.
-		if (OPENGL_INCLUDE_DIR)
+
+
+		if (NOT WIN32)#on my Windows, OPENGL_FOUND was true but this path was empty
 			if (QT_QTOPENGL_FOUND AND OPENGL_FOUND)
-			set(HAVE_QT_OPENGL 1)
-			add_definitions(-DHAVE_QT_OPENGL)
-        	endif()
+				set(HAVE_QT_OPENGL 1)
+				add_definitions(-DHAVE_QT_OPENGL)
+		 	endif()
         endif()
+        
     endif()
 endif()
         
diff --git a/modules/highgui/include/opencv2/highgui/highgui_c.h b/modules/highgui/include/opencv2/highgui/highgui_c.h
index 66fcab4e5..f3b51b729 100644
--- a/modules/highgui/include/opencv2/highgui/highgui_c.h
+++ b/modules/highgui/include/opencv2/highgui/highgui_c.h
@@ -72,11 +72,6 @@ enum {	CV_STYLE_NORMAL			= 0,//QFont::StyleNormal,
 };
 /* ---------*/
 
-//the first bit is for normal or autoresize
-//CV_WINDOW_NORMAL = 0x00000000 and CV_WINDOW_AUTOSIZE = 0x00000001
-//the secont bit is for the gui mode (normal or extended)
-enum {CV_GUI_EXPANDED = 0x00000000, CV_GUI_NORMAL = 0x00000010};
-
 //for color cvScalar(blue_component, green_component, red\_component[, alpha_component])
 //and alpha= 0 <-> 0xFF (not transparent <-> transparent)
 CVAPI(CvFont) cvFont_Qt(const char* nameFont, int pointSize CV_DEFAULT(-1), CvScalar color CV_DEFAULT(cvScalarAll(0)), int weight CV_DEFAULT(CV_FONT_NORMAL),  int style CV_DEFAULT(CV_STYLE_NORMAL), int spacing CV_DEFAULT(0));
@@ -114,13 +109,17 @@ enum
 	CV_WND_PROP_ASPECTRATIO= 2,//to change/get window's aspectratio property
 	//
 	//These 2 flags are used by cvNamedWindow and cvSet/GetWindowProperty
-	CV_WINDOW_NORMAL       = 0,//the user can resize the window (no constraint)
-	CV_WINDOW_AUTOSIZE 	   = 1,//the user cannot resize the window, the size is constrainted by the image displayed
+	CV_WINDOW_NORMAL       = 0x00000000,//the user can resize the window (no constraint)  / also use to switch a fullscreen window to a normal size
+	CV_WINDOW_AUTOSIZE 	   = 0x00000001,//the user cannot resize the window, the size is constrainted by the image displayed
 	//
-	//These 2 flags are used by cvNamedWindow and cvSet/GetWindowProperty
+	//Those flags are only for Qt
+	CV_GUI_EXPANDED 		= 0x00000000,//status bar and tool bar
+	CV_GUI_NORMAL 			= 0x00000010,//old fashious way
+	//
+	//These 3 flags are used by cvNamedWindow and cvSet/GetWindowProperty
 	CV_WINDOW_FULLSCREEN   = 1,//change the window to fullscreen
-	CV_WINDOW_FREERATIO	   = 0,//the image expends as much as it can (no ratio constraint)
-	CV_WINDOW_KEEPRATIO    = 1//the ration image is respected.
+	CV_WINDOW_FREERATIO	   = 0x00000100,//the image expends as much as it can (no ratio constraint)
+	CV_WINDOW_KEEPRATIO    = 0x00000000//the ration image is respected.
 };
 
 /* create window */
diff --git a/modules/highgui/src/window_QT.cpp b/modules/highgui/src/window_QT.cpp
index 4a4ce5787..d4a4b92ac 100755
--- a/modules/highgui/src/window_QT.cpp
+++ b/modules/highgui/src/window_QT.cpp
@@ -394,6 +394,9 @@ CvTrackbar* icvFindTrackbarByName( const char* name_trackbar, const char* name_w
 	QString nameQt(name_trackbar);
 	CvBar* result = NULL;
 
+	if (!name_window && global_control_panel)//window name is null and we have a control panel
+		layout = global_control_panel->myLayout;
+
 	if (!layout)
 	{
 		QPointer<CvWindow> w = icvFindWindowByName( name_window );
@@ -1343,6 +1346,7 @@ CvWindow::CvWindow(QString arg, int arg2)
 
 	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);
@@ -1360,7 +1364,7 @@ CvWindow::CvWindow(QString arg, int arg2)
 #if defined( HAVE_QT_OPENGL )
 	mode_display = CV_MODE_OPENGL;
 #endif
-	createView(mode_display);
+	createView(mode_display, param_ratio_mode);
 
 	//3: shortcuts and actions
 	createActions();
@@ -1611,10 +1615,10 @@ void CvWindow::createShortcuts()
 	QObject::connect( vect_QShortcuts[9], SIGNAL( activated ()),this, SLOT( displayPropertiesWin() ));
 }
 
-void CvWindow::createView(int mode)
+void CvWindow::createView(int mode, int ratio)
 {
 	//mode = CV_MODE_NORMAL or CV_MODE_OPENGL
-	myview = new ViewPort(this, mode,CV_WINDOW_KEEPRATIO);//parent, mode_display, keep_aspect_ratio
+	myview = new ViewPort(this, mode,ratio);//parent, mode_display, keep_aspect_ratio
 	myview->setAlignment(Qt::AlignHCenter);
 }
 
@@ -1806,7 +1810,7 @@ void CvWindow::icvSaveTrackbars(QSettings *settings)
 ViewPort::ViewPort(CvWindow* arg, int arg2, int arg3)
 {
 	centralWidget = arg,
-		      setParent(centralWidget);
+	setParent(centralWidget);
 	mode_display = arg2;
 	param_keepRatio = arg3;
 
diff --git a/modules/highgui/src/window_QT.h b/modules/highgui/src/window_QT.h
index a824e837b..99e25db44 100644
--- a/modules/highgui/src/window_QT.h
+++ b/modules/highgui/src/window_QT.h
@@ -291,6 +291,7 @@ public:
     CvWinProperties* parameters_window ;
     int param_flags;
     int param_gui_mode;
+	int param_ratio_mode;
     QVector<QAction*> vect_QActions;
 
 
@@ -307,7 +308,7 @@ private:
     void createShortcuts();
     void createActions();
     void createToolBar();
-    void createView(int mode);
+    void createView(int display_mode, int ratio_mode);
     void createStatusBar();
     void createGlobalLayout();
     void createBarLayout();