Cocoa: Reflect menu hierarchy in QCocoaMenu* objects

QCocoaMenu is child of either a QCocoaMenuBar, a QCocoaMenuItem as a
submenu, or nothing as a standalone menu. QCocoaMenuItem is child of
its containing QCocoaMenu.

The parent is set during insertion and cleared during removal.

QMenu needs to be updated to avoid double deletion and leaking its
own platform menu.

Change-Id: Iadf60d8062d7466fa616f84f3761fe322fc9aa2e
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoamenubar.mm b/src/plugins/platforms/cocoa/qcocoamenubar.mm
index b880db16a2..b0a53244f4 100644
--- a/src/plugins/platforms/cocoa/qcocoamenubar.mm
+++ b/src/plugins/platforms/cocoa/qcocoamenubar.mm
@@ -109,6 +109,7 @@ void QCocoaMenuBar::insertMenu(QPlatformMenu *platformMenu, QPlatformMenu *befor
         [m_nativeMenu addItem: menu->nsMenuItem()];
     }
 
+    platformMenu->setParent(this);
     [m_nativeMenu setSubmenu: menu->nsMenu() forItem: menu->nsMenuItem()];
 }
 
@@ -123,6 +124,8 @@ void QCocoaMenuBar::removeMenu(QPlatformMenu *platformMenu)
     }
     m_menus.removeOne(menu);
 
+    if (platformMenu->parent() == this)
+        platformMenu->setParent(0);
     NSUInteger realIndex = [m_nativeMenu indexOfItem:menu->nsMenuItem()];
     [m_nativeMenu removeItemAtIndex: realIndex];
 }