[gedit] document panel switcher: no popover menu when only one panel

[Paolo Borelli <pborelli src gnome org>]

commit 59175cd9d82770f421c5f0af908ac370a39eab0f
Author: Sebastien Lafargue <slaf66 gmail com>
Date:   Fri Feb 21 23:15:02 2014 +0100

    document panel switcher: no popover menu when only one panel
    
    https://bugzilla.gnome.org/show_bug.cgi?id=724826

 gedit/gedit-window-private.h |    1 +
 gedit/gedit-window.c         |   47 ++++++++++++++++++++++++++++++++++++++++-
 gedit/gedit-window.ui        |   10 +-------
 3 files changed, 48 insertions(+), 10 deletions(-)
---
diff --git a/gedit/gedit-window-private.h b/gedit/gedit-window-private.h
index 14807e1..0f169c0 100644
--- a/gedit/gedit-window-private.h
+++ b/gedit/gedit-window-private.h
@@ -45,6 +45,7 @@ struct _GeditWindowPrivate
        GeditMultiNotebook *multi_notebook;
 
        GtkWidget      *side_panel;
+       GtkWidget      *side_stack_switcher;
        GtkWidget      *bottom_panel_box;
        GtkWidget      *bottom_panel;
 
diff --git a/gedit/gedit-window.c b/gedit/gedit-window.c
index 9224954..834fa42 100644
--- a/gedit/gedit-window.c
+++ b/gedit/gedit-window.c
@@ -224,6 +224,8 @@ gedit_window_dispose (GObject *object)
         */
        peas_engine_garbage_collect (PEAS_ENGINE (gedit_plugins_engine_get_default ()));
 
+       g_clear_object (&window->priv->side_stack_switcher);
+
        G_OBJECT_CLASS (gedit_window_parent_class)->dispose (object);
 }
 
@@ -2449,20 +2451,61 @@ side_panel_visibility_changed (GtkWidget   *panel,
 }
 
 static void
+on_side_panel_stack_children_number_changed (GtkStack    *stack,
+                                             GtkWidget   *widget,
+                                             GeditWindow *window)
+{
+       GeditWindowPrivate *priv = window->priv;
+       GList *children;
+
+       children = gtk_container_get_children (GTK_CONTAINER (priv->side_panel));
+
+       if (children != NULL && children->next != NULL)
+       {
+               gtk_widget_show (priv->side_stack_switcher);
+               gtk_header_bar_set_custom_title (GTK_HEADER_BAR (priv->side_headerbar), 
priv->side_stack_switcher);
+       }
+       else
+       {
+               gtk_header_bar_set_custom_title (GTK_HEADER_BAR (priv->side_headerbar), NULL);
+       }
+
+       g_list_free (children);
+}
+
+static void
 setup_side_panel (GeditWindow *window)
 {
+       GeditWindowPrivate *priv = window->priv;
        GtkWidget *documents_panel;
 
        gedit_debug (DEBUG_WINDOW);
 
-       g_signal_connect_after (window->priv->side_panel,
+       g_signal_connect_after (priv->side_panel,
                                "notify::visible",
                                G_CALLBACK (side_panel_visibility_changed),
                                window);
 
+       priv->side_stack_switcher = gedit_menu_stack_switcher_new ();
+       gtk_button_set_relief (GTK_BUTTON (priv->side_stack_switcher), GTK_RELIEF_NONE);
+       g_object_ref_sink (priv->side_stack_switcher);
+
+       gedit_menu_stack_switcher_set_stack (GEDIT_MENU_STACK_SWITCHER (priv->side_stack_switcher),
+                                            GTK_STACK (priv->side_panel));
+
+       g_signal_connect (priv->side_panel,
+                         "add",
+                         G_CALLBACK (on_side_panel_stack_children_number_changed),
+                         window);
+
+       g_signal_connect (priv->side_panel,
+                         "remove",
+                         G_CALLBACK (on_side_panel_stack_children_number_changed),
+                         window);
+
        documents_panel = gedit_documents_panel_new (window);
        gtk_widget_show_all (documents_panel);
-       gtk_stack_add_titled (GTK_STACK (window->priv->side_panel),
+       gtk_stack_add_titled (GTK_STACK (priv->side_panel),
                              documents_panel,
                              "GeditWindowDocumentsPanel",
                              _("Documents"));
diff --git a/gedit/gedit-window.ui b/gedit/gedit-window.ui
index e8922bb..07ff1d5 100644
--- a/gedit/gedit-window.ui
+++ b/gedit/gedit-window.ui
@@ -14,18 +14,12 @@
         <child>
           <object class="GtkHeaderBar" id="side_headerbar">
             <property name="visible">True</property>
-            <property name="show_close_button">True</property>
+            <property name="show_close_button">False</property>
+            <property name="title" translatable="yes">Documents</property>
             <style>
               <class name="gedit-titlebar-left"/>
               <class name="titlebar"/>
             </style>
-            <child type="title">
-              <object class="GeditMenuStackSwitcher" id="side_stack_switcher">
-                <property name="visible">True</property>
-                <property name="relief">none</property>
-                <property name="stack">side_panel</property>
-              </object>
-            </child>
           </object>
           <packing>
             <property name="resize">False</property>