Emit exit event when exiting

Author: aashish24

Rendering/Core/vtkRenderWindow.cxx

@@ -620,6 +620,18 @@ void vtkRenderWindow::DoAARender()
     }
 }
 
+//----------------------------------------------------------------------------
+bool vtkRenderWindow::TriggerExitEvent()
+{
+  if (this->HasObserver(vtkCommand::ExitEvent))
+    {
+    this->InvokeEvent(vtkCommand::ExitEvent, NULL);
+    return true;
+    }
+
+  return false;
+}
+
 //----------------------------------------------------------------------------
 // Handle rendering any focal depth frames.
 void vtkRenderWindow::DoFDRender()

Rendering/Core/vtkRenderWindow.h

@@ -591,6 +591,12 @@ class VTKRENDERINGCORE_EXPORT vtkRenderWindow : public vtkWindow
   virtual void DoFDRender();
   virtual void DoAARender();
 
+  // Description:
+  // Trigger exit event if an observer is attached for such an
+  // event. And if triggered an exit event, return true,
+  // false otherwise.
+  bool TriggerExitEvent();
+
   vtkPainterDeviceAdapter* PainterDeviceAdapter;
   vtkRendererCollection *Renderers;
   int Borders;

Rendering/OpenGL/vtkCarbonRenderWindow.cxx

@@ -831,6 +831,8 @@ void vtkCarbonRenderWindow::Initialize ()
 //-----------------------------------------------------------------------------
 void vtkCarbonRenderWindow::Finalize(void)
 {
+  this->TriggerExitEvent();
+
   if (this->CursorHidden)
     {
     this->ShowCursor();

Rendering/OpenGL/vtkCocoaRenderWindow.mm

@@ -253,6 +253,8 @@ - (void)viewFrameDidChange:(NSNotification *)aNotification
 //----------------------------------------------------------------------------
 void vtkCocoaRenderWindow::Finalize()
 {
+  this->TriggerExitEvent();
+
   if(this->OffScreenInitialized)
     {
     this->OffScreenInitialized = 0;

Rendering/OpenGL/vtkWin32OpenGLRenderWindow.cxx

@@ -1125,6 +1125,8 @@ void vtkWin32OpenGLRenderWindow::Initialize (void)
 
 void vtkWin32OpenGLRenderWindow::Finalize(void)
 {
+  this->TriggerExitEvent();
+
   if (this->CursorHidden)
     {
     this->ShowCursor();

Rendering/OpenGL/vtkXOpenGLRenderWindow.cxx

@@ -599,9 +599,8 @@ void vtkXOpenGLRenderWindow::CreateAWindow()
   if(!glXQueryExtension(this->DisplayId, NULL, NULL))
     {
     vtkErrorMacro("GLX not found.  Aborting.");
-    if (this->HasObserver(vtkCommand::ExitEvent))
+    if (this->TriggerExitEvent())
       {
-      this->InvokeEvent(vtkCommand::ExitEvent, NULL);
       return;
       }
     else
@@ -619,9 +618,8 @@ void vtkXOpenGLRenderWindow::CreateAWindow()
   if(!this->Internal->ContextId)
     {
     vtkErrorMacro("Cannot create GLX context.  Aborting.");
-    if (this->HasObserver(vtkCommand::ExitEvent))
+    if (this->TriggerExitEvent())
       {
-      this->InvokeEvent(vtkCommand::ExitEvent, NULL);
       return;
       }
     else
@@ -1070,13 +1068,13 @@ void vtkXOpenGLRenderWindow::Initialize (void)
 
 void vtkXOpenGLRenderWindow::Finalize (void)
 {
+  this->TriggerExitEvent();
 
   // clean up offscreen stuff
   this->SetOffScreenRendering(0);
 
   // clean and destroy window
   this->DestroyWindow();
-
 }
 
 // Change the window to fill the entire screen.

Rendering/OpenGL2/vtkCocoaRenderWindow.mm

@@ -254,6 +254,8 @@ - (void)viewFrameDidChange:(NSNotification *)aNotification
 //----------------------------------------------------------------------------
 void vtkCocoaRenderWindow::Finalize()
 {
+  this->TriggerExitEvent();
+
   if(this->OffScreenInitialized)
     {
     this->OffScreenInitialized = 0;

Rendering/OpenGL2/vtkWin32OpenGLRenderWindow.cxx

@@ -726,9 +726,8 @@ void vtkWin32OpenGLRenderWindow::SetupPixelFormatPaletteAndContext(
                  "Error",
                  MB_ICONERROR | MB_OK);
 #endif
-      if (this->HasObserver(vtkCommand::ExitEvent))
+      if (this->TriggerExitEvent())
         {
-        this->InvokeEvent(vtkCommand::ExitEvent, NULL);
         return;
         }
       else
@@ -750,9 +749,8 @@ void vtkWin32OpenGLRenderWindow::SetupPixelFormatPaletteAndContext(
       MessageBox(WindowFromDC(hDC), "ChoosePixelFormat failed.", "Error",
                  MB_ICONERROR | MB_OK);
 #endif
-      if (this->HasObserver(vtkCommand::ExitEvent))
+      if (this->TriggerExitEvent())
         {
-        this->InvokeEvent(vtkCommand::ExitEvent, NULL);
         return;
         }
       else
@@ -771,9 +769,8 @@ void vtkWin32OpenGLRenderWindow::SetupPixelFormatPaletteAndContext(
       MessageBox(WindowFromDC(hDC), "SetPixelFormat failed.", "Error",
                  MB_ICONERROR | MB_OK);
 #endif
-      if (this->HasObserver(vtkCommand::ExitEvent))
+      if (this->TriggerExitEvent())
         {
-        this->InvokeEvent(vtkCommand::ExitEvent, NULL);
         return;
         }
       else
@@ -1148,6 +1145,8 @@ void vtkWin32OpenGLRenderWindow::Initialize (void)
 
 void vtkWin32OpenGLRenderWindow::Finalize (void)
 {
+  this->TriggerExitEvent();
+
   if (this->CursorHidden)
     {
     this->ShowCursor();

Rendering/OpenGL2/vtkXOpenGLRenderWindow.cxx

@@ -590,9 +590,8 @@ void vtkXOpenGLRenderWindow::CreateAWindow()
   if(!glXQueryExtension(this->DisplayId, NULL, NULL))
     {
     vtkErrorMacro("GLX not found.  Aborting.");
-    if (this->HasObserver(vtkCommand::ExitEvent))
+    if (this->TriggerExitEvent())
       {
-      this->InvokeEvent(vtkCommand::ExitEvent, NULL);
       return;
       }
     else
@@ -610,9 +609,8 @@ void vtkXOpenGLRenderWindow::CreateAWindow()
   if(!this->Internal->ContextId)
     {
     vtkErrorMacro("Cannot create GLX context.  Aborting.");
-    if (this->HasObserver(vtkCommand::ExitEvent))
+    if (this->TriggerExitEvent())
       {
-      this->InvokeEvent(vtkCommand::ExitEvent, NULL);
       return;
       }
     else