backport, add our own Apple Event handler for the quit app event, see #16200

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76395 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/utils.mm

@@ -61,6 +61,9 @@ void wxBell()
     [appleEventManager setEventHandler:self andSelector:@selector(handleOpenAppEvent:withReplyEvent:)
                          forEventClass:kCoreEventClass andEventID:kAEOpenApplication];
     
+    [appleEventManager setEventHandler:self andSelector:@selector(handleQuitAppEvent:withReplyEvent:)
+                         forEventClass:kCoreEventClass andEventID:kAEQuitApplication];
+
     wxTheApp->OSXOnWillFinishLaunching();
 }
 
@@ -134,6 +137,16 @@ void wxBell()
         wxTheApp->OSXStoreOpenURL(cf.AsString());
 }
 
+- (void)handleQuitAppEvent:(NSAppleEventDescriptor *)event
+            withReplyEvent:(NSAppleEventDescriptor *)replyEvent
+{
+    if ( wxTheApp->OSXOnShouldTerminate() )
+    {
+        wxTheApp->OSXOnWillTerminate();
+        wxTheApp->ExitMainLoop();
+    }
+}
+
 - (void)handleOpenAppEvent:(NSAppleEventDescriptor *)event
            withReplyEvent:(NSAppleEventDescriptor *)replyEvent
 {