Definitively resolve the bug with ESC

DestinationGLCanvas.cpp

@@ -140,3 +140,18 @@ void DestinationGLCanvas::resizeGL(int width, int height)
   // TODO: _brush_test_signal(_svg_test_signal)
 }
 
+bool DestinationGLCanvas::eventFilter(QObject *target, QEvent *event)
+{
+  if (event->type() == QEvent::KeyPress)
+    {
+      QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
+      MapperGLCanvas::keyPressEvent(keyEvent);
+      qDebug() << "Test:" << keyEvent << endl;
+      return true;
+    }
+  else
+    {
+      return QObject::eventFilter(target, event);
+    }
+}
+

DestinationGLCanvas.h

@@ -51,6 +51,7 @@ private:
 protected:
   // overriden from QGlWidget:
   virtual void resizeGL(int width, int height);
+  bool eventFilter(QObject *target, QEvent *event);
 };
 
 #endif /* DESTINATIONGLCANVAS_H_ */

MainWindow.cpp

@@ -323,6 +323,7 @@ bool MainWindow::eventFilter(QObject *obj, QEvent *event)
             break;
         }
     }
+    else if (keyEvent->key() == Qt::Key_Escape) outputWindow->setFullScreen(false);
     eventKey = false;
 
     return eventKey;
@@ -1051,6 +1052,7 @@ void MainWindow::createLayout()
 
   outputWindow = new OutputGLWindow(this, this, sourceCanvas);
   outputWindow->setVisible(true);
+  outputWindow->installEventFilter(destinationCanvas);
   outputWindow->installEventFilter(this);
 
   // Source changed -> change destination

OutputGLWindow.cpp

@@ -65,27 +65,10 @@ void OutputGLWindow::closeEvent(QCloseEvent *event)
   this->parentWidget()->setFocus();
 }
 
-void OutputGLWindow::keyPressEvent(QKeyEvent *event)
-{
-  // Escape from full screen mode.
-  if (event->key() == Qt::Key_Escape)
-  {
-    if (isFullScreen())
-    {
-      setFullScreen(false);
-      emit fullScreenToggled(false);
-    }
-  }
-  else
-  {
-    QDialog::keyPressEvent(event);
-  }
-}
-
-
 void OutputGLWindow::setFullScreen(bool fullscreen)
 {
   setCursorVisible(!fullscreen);
+  emit fullScreenToggled(fullscreen);
   // Activate crosshair in fullscreen mode.
   // should be only drawn if the controls should be shown
   canvas->setDisplayCrosshair(fullscreen && this->canvas->displayControls());

OutputGLWindow.h

@@ -41,7 +41,6 @@ public slots:
 
 protected:
   void closeEvent(QCloseEvent* event);
-  void keyPressEvent(QKeyEvent *event);
 
 signals:
   void closed();