adding a app-defined event seems to quit inner eventloops like eg the popup of the combobox, therefore use the cf api in this case

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70684 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/evtloop.mm

@@ -143,6 +143,7 @@ bool wxGUIEventLoop::Pending() const
 #endif
 }
 
+
 bool wxGUIEventLoop::Dispatch()
 {
     if ( !wxTheApp )
@@ -253,6 +254,15 @@ void wxGUIEventLoop::DoStop()
 }
 
 void wxGUIEventLoop::WakeUp()
+{
+    NSEvent* cevent = [NSApp currentEvent];
+    
+    // when already in a mouse event handler, don't add higher level event
+    if ( cevent != nil && [cevent type] < NSKeyDown )
+    {
+        wxCFEventLoop::WakeUp();        
+    }
+    else
     {
         wxMacAutoreleasePool autoreleasepool;
         NSEvent *event = [NSEvent otherEventWithType:NSApplicationDefined 
@@ -264,6 +274,7 @@ void wxGUIEventLoop::WakeUp()
                                          subtype:0 data1:0 data2:0]; 
         [NSApp postEvent:event atStart:FALSE];
     }
+}
 
 CFRunLoopRef wxGUIEventLoop::CFGetCurrentRunLoop() const
 {