[LyX/master] * fix bug 8925: create a temporary action to avoid a menu with any action. Otherwise it will not shown on Mac OS X 10.9 with Cocoa

[Stephan Witt]

commit 0e7eaef349710df71d0f9492d9d098ba76882e6d
Author: Stephan Witt <sw...@lyx.org>
Date:   Sat Mar 8 12:49:40 2014 +0100

    * fix bug 8925: create a temporary action to avoid a menu with any action. 
Otherwise it will not shown on Mac OS X 10.9 with Cocoa

diff --git a/src/frontends/qt4/Menus.cpp b/src/frontends/qt4/Menus.cpp
index cc07afc..8e9fd54 100644
--- a/src/frontends/qt4/Menus.cpp
+++ b/src/frontends/qt4/Menus.cpp
@@ -1930,8 +1930,11 @@ void Menus::Impl::macxMenuBarInit(QMenuBar * qmb)
                 QAction::AboutRole},
                {LFUN_DIALOG_SHOW, "prefs", "Preferences",
                 QAction::PreferencesRole},
-               /* {LFUN_RECONFIGURE, "", "Reconfigure",
-                QAction::ApplicationSpecificRole}, */
+#if !(defined(QT_MAC_USE_COCOA) || (QT_VERSION >= 0x050000))
+               /* This doesn't work with Cocoa. */
+               {LFUN_RECONFIGURE, "", "Reconfigure",
+                QAction::ApplicationSpecificRole},
+#endif
                {LFUN_LYX_QUIT, "", "Quit LyX", QAction::QuitRole}
        };
        const size_t num_entries = sizeof(entries) / sizeof(entries[0]);
@@ -1953,19 +1956,10 @@ void Menus::Impl::macxMenuBarInit(QMenuBar * qmb)
        MenuDefinition::const_iterator cit = mac_special_menu_.begin();
        MenuDefinition::const_iterator end = mac_special_menu_.end();
        for (size_t i = 0 ; cit != end ; ++cit, ++i) {
-#if defined(QT_MAC_USE_COCOA) && (QT_MAC_USE_COCOA > 0)
-               if (first_call || entries[i].role != 
QAction::ApplicationSpecificRole) {
-                       Action * action = new Action(QIcon(), cit->label(),
-                                cit->func(), QString(), qMenu);
-                       action->setMenuRole(entries[i].role);
-                       qMenu->addAction(action);
-               }
-#else
                Action * action = new Action(QIcon(), cit->label(),
                        cit->func(), QString(), qMenu);
                action->setMenuRole(entries[i].role);
                qMenu->addAction(action);
-#endif
        }
 }
 
@@ -2283,6 +2277,14 @@ void Menus::fillMenuBar(QMenuBar * qmb, GuiView * view, 
bool initial)
 
                Menu * menu = new Menu(view, m->submenuname(), true);
                menu->setTitle(label(*m));
+
+#if defined(Q_WS_MACX) && (defined(QT_MAC_USE_COCOA) || (QT_VERSION >= 
0x050000))
+               // On Mac OS with QT/cocoa, the menu is not displayed if there 
is no action
+               // so we create a temporary one here
+               QAction * action = new QAction(menu);
+               menu->addAction(action);
+#endif
+
                qmb->addMenu(menu);
 
                d->name_map_[view][name] = menu;