Many changes:

- Introduced GTKGetWindow() which returns all GdkWindows associated with the
  given wxWindow
- Renamed IsOwnGtkWindow() to GTKIsOwnWindow() to avoid confusion with the old
  virtual function (the new one is non-virtual and is implemented in terms of
  GTKGetWindow())
- Refactored/simplified event handlers code in gtk/window.cpp
- Fixed some header guards names (__GTKFOO__ -> _WX_GTK_FOO_H_)
- Added GTKUpdateCursor() which sets the current cursor for all windows
  returned by GTKGetWindow()
- Factored out code from many different classes in wxControl::OnInternalIdle()
  which now updates the cursor, checks for internal focus and sends update UI
  events


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40815 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/spinctrl.h

@@ -61,7 +61,6 @@ public:
     // implementation
     void OnChar( wxKeyEvent &event );
     
-    bool IsOwnGtkWindow( GdkWindow *window );
     void GtkDisableEvents();
     void GtkEnableEvents();
 
@@ -69,6 +68,7 @@ public:
 
 protected:
     virtual wxSize DoGetBestSize() const;
+    virtual GdkWindow *GTKGetWindow(wxArrayGdkWindows& windows) const;
 
     // Widgets that use the style->base colour for the BG colour should
     // override this and return true.