[empathy] show label if contact list is empty

[Felix Kaser <kaserf src gnome org>]

commit b3ee9d59131212736dc713e7f1687cf8536bb979
Author: Felix Kaser <f kaser gmx net>
Date:   Thu Aug 5 12:12:28 2010 +0200

    show label if contact list is empty
    
    at the moment there is only one label, but we should distinguish
    if the contact list is empty because no contact is online or
    because the live search matched nothing

 src/empathy-main-window.c |   52 +++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 48 insertions(+), 4 deletions(-)
---
diff --git a/src/empathy-main-window.c b/src/empathy-main-window.c
index b82c077..3fdccff 100644
--- a/src/empathy-main-window.c
+++ b/src/empathy-main-window.c
@@ -103,6 +103,7 @@ struct _EmpathyMainWindowPriv {
 	EmpathyEventManager     *event_manager;
 	guint                    flash_timeout_id;
 	gboolean                 flash_on;
+	gboolean                 empty;
 
 	GSettings              *gsettings_ui;
 	GSettings              *gsettings_contacts;
@@ -359,6 +360,42 @@ OUT:
 }
 
 static void
+main_window_row_deleted_cb (GtkTreeModel      *model,
+			    GtkTreePath       *path,
+			    EmpathyMainWindow *window)
+{
+	EmpathyMainWindowPriv *priv = GET_PRIV (window);
+	GtkTreeIter help_iter;
+
+	if (!gtk_tree_model_get_iter_first (model, &help_iter)) {
+		priv->empty = TRUE;
+
+		/* TODO: check if we are searching or not */
+		gtk_label_set_text (GTK_LABEL (priv->no_entry_label),
+				_("Your contact list is empty"));
+		gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->notebook),
+				1);
+		g_debug ("contact list empty");
+	}
+}
+
+static void
+main_window_row_inserted_cb (GtkTreeModel      *model,
+			     GtkTreePath       *path,
+			     GtkTreeIter       *iter,
+			     EmpathyMainWindow *window)
+{
+	EmpathyMainWindowPriv *priv = GET_PRIV (window);
+
+	if (priv->empty) {
+		priv->empty = FALSE;
+		gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->notebook),
+				0);
+		g_debug ("contact list is not empty any more");
+	}
+}
+
+static void
 main_window_remove_error (EmpathyMainWindow *window,
 			  TpAccount         *account)
 {
@@ -1485,6 +1522,7 @@ empathy_main_window_init (EmpathyMainWindow *window)
 	gboolean                  show_offline;
 	gchar                    *filename;
 	GSList                   *l;
+	GtkTreeModel             *model;
 
 	priv = window->priv = G_TYPE_INSTANCE_GET_PRIVATE (window,
 			EMPATHY_TYPE_MAIN_WINDOW, EmpathyMainWindowPriv);
@@ -1492,6 +1530,8 @@ empathy_main_window_init (EmpathyMainWindow *window)
 	priv->gsettings_ui = g_settings_new (EMPATHY_PREFS_UI_SCHEMA);
 	priv->gsettings_contacts = g_settings_new (EMPATHY_PREFS_CONTACTS_SCHEMA);
 
+	priv->empty = TRUE;
+
 	gtk_window_set_title (GTK_WINDOW (window), _("Contact List"));
 	gtk_window_set_role (GTK_WINDOW (window), "contact_list");
 	gtk_window_set_default_size (GTK_WINDOW (window), 225, 325);
@@ -1649,10 +1689,14 @@ empathy_main_window_init (EmpathyMainWindow *window)
 	g_signal_connect_swapped (window, "map",
 		G_CALLBACK (gtk_widget_grab_focus), priv->individual_view);
 
-	/* TODO: Set up the TreeView Notebook */
-	// have to detect when the contact list is empty (gtk_tree_model_get_iter_first)
-	//if we are searching display: no match found, otherwise: your contact list is empty
-	//hook to row-added and row removed? fire own signals when empty, not empty?
+	/* Connect to proper signals to check if contact list is empty or not */
+	model = gtk_tree_view_get_model (GTK_TREE_VIEW (priv->individual_view));
+	g_signal_connect (model, "row-inserted",
+			  G_CALLBACK (main_window_row_inserted_cb),
+			  window);
+	g_signal_connect (model, "row-deleted",
+			  G_CALLBACK (main_window_row_deleted_cb),
+			  window);
 
 	/* Load user-defined accelerators. */
 	main_window_accels_load ();