Make sure the tree view is the focus on an owner page

gnucash/gnome/gnc-plugin-page-owner-tree.c

@@ -387,6 +387,50 @@ gnc_plugin_page_owner_tree_new (GncOwnerType owner_type)
     return GNC_PLUGIN_PAGE(plugin_page);
 }
 
+
+static gboolean
+gnc_plugin_page_owner_focus (GtkTreeView *tree_view)
+{
+    if (GTK_IS_TREE_VIEW(tree_view))
+    {
+        if (!gtk_widget_is_focus (GTK_WIDGET(tree_view)))
+            gtk_widget_grab_focus (GTK_WIDGET(tree_view));
+    }
+    return FALSE;
+}
+
+
+/**
+ * Whenever the current page is changed, if an owner page is
+ * the current page, set focus on the treeview.
+ */
+static void
+gnc_plugin_page_owner_main_window_page_changed (GncMainWindow *window,
+        GncPluginPage *plugin_page, gpointer user_data)
+{
+    // We continue only if the plugin_page is a valid
+    if (!plugin_page || !GNC_IS_PLUGIN_PAGE(plugin_page))
+        return;
+
+    if (gnc_main_window_get_current_page (window) == plugin_page)
+    {
+        GncPluginPageOwnerTree *page;
+        GncPluginPageOwnerTreePrivate *priv;
+
+        if (!GNC_IS_PLUGIN_PAGE_OWNER_TREE(plugin_page))
+            return;
+
+        page = GNC_PLUGIN_PAGE_OWNER_TREE(plugin_page);
+        priv = GNC_PLUGIN_PAGE_OWNER_TREE_GET_PRIVATE(page);
+
+        // The page changed signal is emitted multiple times so we need
+        // to use an idle_add to change the focus to the tree view
+        g_idle_add ((GSourceFunc)gnc_plugin_page_owner_focus,
+                      GTK_TREE_VIEW (priv->tree_view));
+    }
+}
+
+
 static void
 gnc_plugin_page_owner_tree_class_init (GncPluginPageOwnerTreeClass *klass)
 {
@@ -554,6 +598,7 @@ gnc_plugin_page_owner_tree_create_widget (GncPluginPage *plugin_page)
 {
     GncPluginPageOwnerTree *page;
     GncPluginPageOwnerTreePrivate *priv;
+    GncMainWindow  *window;
     GtkTreeSelection *selection;
     GtkTreeView *tree_view;
     GtkWidget *scrolled_window;
@@ -668,6 +713,11 @@ gnc_plugin_page_owner_tree_create_widget (GncPluginPage *plugin_page)
     gnc_gui_component_set_session (priv->component_id,
                                    gnc_get_current_session());
 
+    window = GNC_MAIN_WINDOW(GNC_PLUGIN_PAGE(plugin_page)->window);
+    g_signal_connect(window, "page_changed",
+                     G_CALLBACK(gnc_plugin_page_owner_main_window_page_changed),
+                     plugin_page);
+
     LEAVE("widget = %p", priv->widget);
     return priv->widget;
 }