[emerillon] Disable the sensitivity of the selection button if less than two pages are available

[Łukasz Jernaś <ljernas src gnome org>]

commit d91893c9cf810207ce94d4b058c8b72ebd231710
Author: Simon Wenner <simon wenner ch>
Date:   Sun May 2 14:57:56 2010 +0200

    Disable the sensitivity of the selection button if less than two pages are available

 emerillon/sidebar.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/emerillon/sidebar.c b/emerillon/sidebar.c
index e487c34..03759f9 100644
--- a/emerillon/sidebar.c
+++ b/emerillon/sidebar.c
@@ -403,6 +403,7 @@ emerillon_sidebar_init (EmerillonSidebar *sidebar)
   sidebar->priv->select_button = gtk_toggle_button_new ();
   gtk_button_set_relief (GTK_BUTTON (sidebar->priv->select_button), 
       GTK_RELIEF_NONE);
+  gtk_widget_set_sensitive (sidebar->priv->select_button, FALSE);
 
   g_signal_connect (sidebar->priv->select_button, "button_press_event",
       G_CALLBACK (emerillon_sidebar_select_button_press_cb),
@@ -542,6 +543,9 @@ emerillon_sidebar_add_page (EmerillonSidebar *sidebar,
 
   g_free (label_title);
 
+  if (gtk_notebook_get_n_pages (GTK_NOTEBOOK (sidebar->priv->notebook)) > 1)
+    gtk_widget_set_sensitive (sidebar->priv->select_button, TRUE);
+
   g_signal_emit (G_OBJECT (sidebar), signals[SIGNAL_PAGE_ADDED],
       0, main_widget);
 }
@@ -604,6 +608,9 @@ emerillon_sidebar_remove_page (EmerillonSidebar *sidebar,
             gtk_label_set_text (GTK_LABEL (sidebar->priv->label), "");
         }
 
+      if (gtk_notebook_get_n_pages (GTK_NOTEBOOK (sidebar->priv->notebook)) <= 1)
+        gtk_widget_set_sensitive (sidebar->priv->select_button, FALSE);
+
       g_signal_emit (G_OBJECT (sidebar),
           signals[SIGNAL_PAGE_REMOVED], 0, main_widget);
     }