New functions with QT GUI:

Fixed memory leak
Disable QT by default

CMakeLists.txt

@@ -496,7 +496,7 @@ endif()
 ############################### QT ################################
 set(HAVE_QT 0)
 set(HAVE_QT_OPENGL 0)
-set(AUTOSWITCH_QT 1)#uses to disable QT
+set(AUTOSWITCH_QT 0)#uses to disable QT
 
 find_package(Qt4)# QUIET)
 if (QT4_FOUND AND AUTOSWITCH_QT)

modules/highgui/src/window_QT.cpp

@@ -780,7 +780,15 @@ CvWindow::~CvWindow()
 
         delete layout;
     }
+    
 
+    delete shortcutZ;
+    delete shortcutPlus;
+    delete shortcutMinus;
+    delete shortcutLeft;
+    delete shortcutRight;
+    delete shortcutUp;
+    delete shortcutDown;
 }
 
 void CvWindow::displayInfo(QString text,int delayms)