Return NULL from wxWindow::GetCapture() when the capture is being lost.

[wxWidgets.git] / src / gtk / menu.cpp

diff --git a/src/gtk/menu.cpp b/src/gtk/menu.cpp
index fe49bc3fa19b55e94752b90b093d54f65ea7ad9f..4cf5d7f04e070653e570eacf6e596b6eb87deea6 100644 (file)
--- a/src/gtk/menu.cpp
+++ b/src/gtk/menu.cpp
@@ -2,7 +2,6 @@
 // Name:        src/gtk/menu.cpp
 // Purpose:     implementation of wxMenuBar and wxMenu classes for wxGTK
 // Author:      Robert Roebling
 // Name:        src/gtk/menu.cpp
 // Purpose:     implementation of wxMenuBar and wxMenu classes for wxGTK
 // Author:      Robert Roebling

-// Id:          $Id$

 // Copyright:   (c) 1998 Robert Roebling
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 // Copyright:   (c) 1998 Robert Roebling
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////


@@ -17,6 +16,7 @@
 #ifndef WX_PRECOMP
     #include "wx/intl.h"
     #include "wx/log.h"
 #ifndef WX_PRECOMP
     #include "wx/intl.h"
     #include "wx/log.h"

+    #include "wx/dialog.h"

     #include "wx/frame.h"
     #include "wx/bitmap.h"
     #include "wx/app.h"
     #include "wx/frame.h"
     #include "wx/bitmap.h"
     #include "wx/app.h"


@@ -30,6 +30,9 @@
 #include "wx/gtk/private/gtk2-compat.h"
 #include "wx/gtk/private/mnemonics.h"
 
 #include "wx/gtk/private/gtk2-compat.h"
 #include "wx/gtk/private/mnemonics.h"
 

+// Number of currently open modal dialogs, defined in src/gtk/toplevel.cpp.
+extern int wxOpenModalDialogsCount;
+

 // we use normal item but with a special id for the menu title
 static const int wxGTK_TITLE_ID = -3;
 
 // we use normal item but with a special id for the menu title
 static const int wxGTK_TITLE_ID = -3;
 


@@ -43,8 +46,34 @@ extern "C"
 static void wxGetGtkAccel(const wxMenuItem*, guint*, GdkModifierType*);
 #endif
 
 static void wxGetGtkAccel(const wxMenuItem*, guint*, GdkModifierType*);
 #endif
 

+// Unity hack: under Ubuntu Unity the global menu bar is not affected by a
+// modal dialog being shown, so the user can select a menu item before hiding
+// the dialog and, in particular, a new instance of the same dialog can be
+// shown again, breaking a lot of programs not expecting this.
+//
+// So explicitly ignore any menu events generated while any modal dialogs
+// are opened except for the events generated by a context menu within the
+// modal dialog itself that should have a dialog as their invoking window.
+static bool IsMenuEventAllowed(wxMenu* menu)
+{
+    if ( wxOpenModalDialogsCount )
+    {
+        wxWindow* tlw = wxGetTopLevelParent(menu->GetWindow());
+        if ( !tlw || !wxDynamicCast(tlw, wxDialog) )
+        {
+            // This must be an event from a menu bar of one of the frames.
+            return false;
+        }
+    }
+
+    return true;
+}
+

 static void DoCommonMenuCallbackCode(wxMenu *menu, wxMenuEvent& event)
 {
 static void DoCommonMenuCallbackCode(wxMenu *menu, wxMenuEvent& event)
 {

+    if ( !IsMenuEventAllowed(menu) )
+        return;
+

     event.SetEventObject( menu );
 
     wxEvtHandler* handler = menu->GetEventHandler();
     event.SetEventObject( menu );
 
     wxEvtHandler* handler = menu->GetEventHandler();


@@ -63,15 +92,6 @@ static void DoCommonMenuCallbackCode(wxMenu *menu, wxMenuEvent& event)
 
 wxMenuBar::~wxMenuBar()
 {
 
 wxMenuBar::~wxMenuBar()
 {

-    if (m_widget)
-    {
-        // Work around a probable bug in Ubuntu 12.04 which causes a warning if
-        // gtk_widget_destroy() is called on a wxMenuBar attached to a frame
-        GtkWidget* widget = m_widget;
-        m_focusWidget =
-        m_widget = NULL;
-        g_object_unref(widget);
-    }

 }
 
 void wxMenuBar::Init(size_t n, wxMenu *menus[], const wxString titles[], long style)
 }
 
 void wxMenuBar::Init(size_t n, wxMenu *menus[], const wxString titles[], long style)


@@ -103,8 +123,6 @@ void wxMenuBar::Init(size_t n, wxMenu *menus[], const wxString titles[], long st
     }
 
     PostCreation();
     }
 
     PostCreation();

-
-    GTKApplyWidgetStyle();

 #endif // wxUSE_LIBHILDON || wxUSE_LIBHILDON2/!wxUSE_LIBHILDON && !wxUSE_LIBHILDON2
 
     g_object_ref_sink(m_widget);
 #endif // wxUSE_LIBHILDON || wxUSE_LIBHILDON2/!wxUSE_LIBHILDON && !wxUSE_LIBHILDON2
 
     g_object_ref_sink(m_widget);


@@ -133,6 +151,18 @@ wxMenuBar::wxMenuBar()
 namespace
 {
 
 namespace
 {
 

+// This should be called when detaching menus to ensure that they don't keep
+// focus grab, because if they do, they continue getting all GTK+ messages
+// which they can't process any more in their (soon to be) unrealized state.
+void
+EnsureNoGrab(GtkWidget* widget)
+{
+#if !wxUSE_LIBHILDON && !wxUSE_LIBHILDON2
+    gtk_widget_hide(widget);
+    gtk_grab_remove(widget);
+#endif // !wxUSE_LIBHILDON && !wxUSE_LIBHILDON2
+}
+

 void
 DetachFromFrame(wxMenu* menu, wxFrame* frame)
 {
 void
 DetachFromFrame(wxMenu* menu, wxFrame* frame)
 {


@@ -154,6 +184,8 @@ DetachFromFrame(wxMenu* menu, wxFrame* frame)
             DetachFromFrame(menuitem->GetSubMenu(), frame);
         node = node->GetNext();
     }
             DetachFromFrame(menuitem->GetSubMenu(), frame);
         node = node->GetNext();
     }

+
+    EnsureNoGrab(menu->m_menu);

 }
 
 void
 }
 
 void


@@ -241,6 +273,8 @@ void wxMenuBar::Detach()
         node = node->GetNext();
     }
 
         node = node->GetNext();
     }
 

+    EnsureNoGrab(m_widget);
+

     wxMenuBarBase::Detach();
 }
 
     wxMenuBarBase::Detach();
 }
 


@@ -293,6 +327,7 @@ void wxMenuBar::GtkAppend(wxMenu* menu, const wxString& title, int pos)
 
         gtk_menu_item_set_submenu( GTK_MENU_ITEM(menu->m_owner), menu->m_menu );
     }
 
         gtk_menu_item_set_submenu( GTK_MENU_ITEM(menu->m_owner), menu->m_menu );
     }

+    g_object_ref(menu->m_owner);

 
     gtk_widget_show( menu->m_owner );
 
 
     gtk_widget_show( menu->m_owner );
 


@@ -334,10 +369,18 @@ wxMenu *wxMenuBar::Remove(size_t pos)
     if ( !menu )
         return NULL;
 
     if ( !menu )
         return NULL;
 

-    gtk_menu_item_set_submenu(GTK_MENU_ITEM(menu->m_owner), NULL);
+    // remove item from menubar before destroying item to avoid spurious
+    // warnings from Ubuntu libdbusmenu

     gtk_container_remove(GTK_CONTAINER(m_menubar), menu->m_owner);
     gtk_container_remove(GTK_CONTAINER(m_menubar), menu->m_owner);

+    // remove submenu to avoid destroying it when item is destroyed
+#ifdef __WXGTK3__
+    gtk_menu_item_set_submenu(GTK_MENU_ITEM(menu->m_owner), NULL);
+#else
+    gtk_menu_item_remove_submenu(GTK_MENU_ITEM(menu->m_owner));
+#endif

 
     gtk_widget_destroy( menu->m_owner );
 
     gtk_widget_destroy( menu->m_owner );

+    g_object_unref(menu->m_owner);

     menu->m_owner = NULL;
 
     if ( m_menuBarFrame )
     menu->m_owner = NULL;
 
     if ( m_menuBarFrame )


@@ -479,6 +522,9 @@ static void menuitem_activate(GtkWidget*, wxMenuItem* item)
     if (!item->IsEnabled())
         return;
 
     if (!item->IsEnabled())
         return;
 

+    if ( !IsMenuEventAllowed(item->GetMenu()) )
+        return;
+

     int id = item->GetId();
     if (id == wxGTK_TITLE_ID)
     {
     int id = item->GetId();
     if (id == wxGTK_TITLE_ID)
     {


@@ -506,6 +552,14 @@ static void menuitem_activate(GtkWidget*, wxMenuItem* item)
 
     wxMenu* menu = item->GetMenu();
     menu->SendEvent(id, item->IsCheckable() ? item->IsChecked() : -1);
 
     wxMenu* menu = item->GetMenu();
     menu->SendEvent(id, item->IsCheckable() ? item->IsChecked() : -1);

+
+    // A lot of existing code, including any program that closes its main
+    // window from a menu handler and expects the program to exit -- as our own
+    // minimal sample -- relies on getting an idle event after a menu event.
+    // But when using Ubuntu Unity detached menus, we get called from a DBUS
+    // handler called from g_timeout_dispatch() and Glib doesn't send us any
+    // idle events after it. So ask explicitly for an idle event to get one.
+    wxWakeUpIdle();

 }
 }
 
 }
 }
 


@@ -580,9 +634,20 @@ wxMenuItem::wxMenuItem(wxMenu *parentMenu,
 
 wxMenuItem::~wxMenuItem()
 {
 
 wxMenuItem::~wxMenuItem()
 {

+    if (m_menuItem)
+        g_object_unref(m_menuItem);

    // don't delete menu items, the menus take care of that
 }
 
    // don't delete menu items, the menus take care of that
 }
 

+void wxMenuItem::SetMenuItem(GtkWidget* menuItem)
+{
+    if (m_menuItem)
+        g_object_unref(m_menuItem);
+    m_menuItem = menuItem;
+    if (menuItem)
+        g_object_ref(menuItem);
+}
+

 void wxMenuItem::SetItemLabel( const wxString& str )
 {
 #if wxUSE_ACCEL
 void wxMenuItem::SetItemLabel( const wxString& str )
 {
 #if wxUSE_ACCEL


@@ -715,8 +780,6 @@ void wxMenu::Init()
 
     m_accel = gtk_accel_group_new();
     m_menu = gtk_menu_new();
 
     m_accel = gtk_accel_group_new();
     m_menu = gtk_menu_new();

-    // NB: keep reference to the menu so that it is not destroyed behind
-    //     our back by GTK+ e.g. when it is removed from menubar:

     g_object_ref_sink(m_menu);
 
     m_owner = NULL;
     g_object_ref_sink(m_menu);
 
     m_owner = NULL;


@@ -748,16 +811,18 @@ wxMenu::~wxMenu()
     // Destroying a menu generates a "hide" signal even if it's not shown
     // currently, so disconnect it to avoid dummy wxEVT_MENU_CLOSE events
     // generation.
     // Destroying a menu generates a "hide" signal even if it's not shown
     // currently, so disconnect it to avoid dummy wxEVT_MENU_CLOSE events
     // generation.

-    g_signal_handlers_disconnect_by_func(m_menu, (gpointer)menu_hide, this);
+    g_signal_handlers_disconnect_matched(m_menu,
+        GSignalMatchType(G_SIGNAL_MATCH_DATA), 0, 0, NULL, NULL, this);

 
 

-    // see wxMenu::Init
-    g_object_unref(m_menu);
-
-    // if the menu is inserted in another menu at this time, there was
-    // one more reference to it:

     if (m_owner)
     if (m_owner)

-       gtk_widget_destroy(m_menu);
+    {
+        gtk_widget_destroy(m_owner);
+        g_object_unref(m_owner);
+    }
+    else
+        gtk_widget_destroy(m_menu);

 
 

+    g_object_unref(m_menu);

     g_object_unref(m_accel);
 }
 
     g_object_unref(m_accel);
 }
 


@@ -911,23 +976,14 @@ wxMenuItem *wxMenu::DoRemove(wxMenuItem *item)
         return NULL;
 
     GtkWidget * const mitem = item->GetMenuItem();
         return NULL;
 
     GtkWidget * const mitem = item->GetMenuItem();

+
+    g_signal_handlers_disconnect_matched(mitem,
+        GSignalMatchType(G_SIGNAL_MATCH_DATA), 0, 0, NULL, NULL, item);
+

 #ifdef __WXGTK3__
     gtk_menu_item_set_submenu(GTK_MENU_ITEM(mitem), NULL);
 #else
 #ifdef __WXGTK3__
     gtk_menu_item_set_submenu(GTK_MENU_ITEM(mitem), NULL);
 #else

-    if (!gtk_check_version(2,12,0))
-    {
-        // gtk_menu_item_remove_submenu() is deprecated since 2.12, but
-        // gtk_menu_item_set_submenu() can now be used with NULL submenu now so
-        // just do use it.
-        gtk_menu_item_set_submenu(GTK_MENU_ITEM(mitem), NULL);
-    }
-    else // GTK+ < 2.12
-    {
-        // In 2.10 calling gtk_menu_item_set_submenu() with NULL submenu
-        // results in critical GTK+ error messages so use the old function
-        // instead.
-        gtk_menu_item_remove_submenu(GTK_MENU_ITEM(mitem));
-    }
+    gtk_menu_item_remove_submenu(GTK_MENU_ITEM(mitem));

 #endif
 
     gtk_widget_destroy(mitem);
 #endif
 
     gtk_widget_destroy(mitem);