From 6078bd7ddc6819d2650435313bb824442bbe033d Mon Sep 17 00:00:00 2001
From: Renato Araujo Oliveira Filho <renato.filho@canonical.com>
Date: Fri, 23 Nov 2012 12:03:07 -0300
Subject: Fixed QMenumodel behaviour when the GMenuModel is destroyed.

---
 libqmenumodel/src/qdbusmenumodel.cpp |  6 +++++-
 libqmenumodel/src/qmenumodel.cpp     | 19 ++++++++++++++++++-
 libqmenumodel/src/qmenumodel.h       |  3 +++
 3 files changed, 26 insertions(+), 2 deletions(-)

(limited to 'libqmenumodel')

diff --git a/libqmenumodel/src/qdbusmenumodel.cpp b/libqmenumodel/src/qdbusmenumodel.cpp
index 97990b4..070381f 100644
--- a/libqmenumodel/src/qdbusmenumodel.cpp
+++ b/libqmenumodel/src/qdbusmenumodel.cpp
@@ -89,7 +89,11 @@ void QDBusMenuModel::stop()
 /*! \internal */
 void QDBusMenuModel::serviceVanish(GDBusConnection *)
 {
-    setMenuModel(NULL);
+    GMenuModel *model = menuModel();
+    if (model != NULL) {
+        setMenuModel(NULL);
+        g_object_unref(model);
+    }
 }
 
 /*! \internal */
diff --git a/libqmenumodel/src/qmenumodel.cpp b/libqmenumodel/src/qmenumodel.cpp
index 8735e6c..a45d647 100644
--- a/libqmenumodel/src/qmenumodel.cpp
+++ b/libqmenumodel/src/qmenumodel.cpp
@@ -56,7 +56,11 @@ void QMenuModel::setMenuModel(GMenuModel *other)
     if (m_menuModel == other) {
         return;
     }
+    setMenuModelImpl(other);
+}
 
+void QMenuModel::setMenuModelImpl(GMenuModel *other)
+{
     beginResetModel();
 
     clearModel();
@@ -64,6 +68,9 @@ void QMenuModel::setMenuModel(GMenuModel *other)
     m_menuModel = other;
 
     if (m_menuModel) {
+        g_object_weak_ref(reinterpret_cast<GObject*>(m_menuModel),
+                          reinterpret_cast<GWeakNotify>(QMenuModel::onGMenuModelDestroyed),
+                          this);
         // this will trigger the menu load
         (void) g_menu_model_get_n_items(m_menuModel);
         m_signalChangedId = g_signal_connect(m_menuModel,
@@ -85,9 +92,11 @@ GMenuModel *QMenuModel::menuModel() const
 void QMenuModel::clearModel()
 {
     if (m_menuModel) {
+        g_object_weak_unref(reinterpret_cast<GObject*>(m_menuModel),
+                            reinterpret_cast<GWeakNotify>(QMenuModel::onGMenuModelDestroyed),
+                            this);
         g_signal_handler_disconnect(m_menuModel, m_signalChangedId);
         m_signalChangedId = 0;
-        g_object_unref(m_menuModel);
         m_menuModel = NULL;
     }
 
@@ -223,6 +232,14 @@ QVariant QMenuModel::getExtraProperties(const QModelIndex &index) const
 
     return extra;
 }
+/*! \internal */
+void QMenuModel::onGMenuModelDestroyed(gpointer data,
+                                       GObject *oldObject)
+{
+    QMenuModel *self = reinterpret_cast<QMenuModel*>(data);
+    self->m_menuModel = NULL;
+    self->setMenuModelImpl(NULL);
+}
 
 /*! \internal */
 void QMenuModel::onItemsChanged(GMenuModel *,
diff --git a/libqmenumodel/src/qmenumodel.h b/libqmenumodel/src/qmenumodel.h
index beec7ba..f3b431c 100644
--- a/libqmenumodel/src/qmenumodel.h
+++ b/libqmenumodel/src/qmenumodel.h
@@ -26,6 +26,7 @@ typedef int gint;
 typedef unsigned int guint;
 typedef void* gpointer;
 typedef struct _GMenuModel GMenuModel;
+typedef struct _GObject GObject;
 
 class QMenuModel : public QAbstractListModel
 {
@@ -62,8 +63,10 @@ private:
     QVariant getExtraProperties(const QModelIndex &index) const;
     QString parseExtraPropertyName(const QString &name) const;
     void clearModel();
+    void setMenuModelImpl(GMenuModel *model);
 
     static void onItemsChanged(GMenuModel *model, gint position, gint removed, gint added, gpointer data);
+    static void onGMenuModelDestroyed(gpointer data, GObject *oldObject);
 };
 
 #endif
-- 
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