[empathy] Ensure a minimum size of tabs in the chat window

[Sjoerd Simons <sjoerds src gnome org>]

commit f93b95e549591cc8302d894e44641f42751b7f67
Author: Sjoerd Simons <sjoerd simons collabora co uk>
Date:   Sat May 30 17:00:12 2009 +0100

    Ensure a minimum size of tabs in the chat window
    
    When there are a lot of tabs in the chat window it's not useful to resize them
    such that only the ellipsis is actually visible. To prevent this make the
    notebook scrollable and ensure the tabs are width enough to contain
    approximately 12 characters.
---
 src/empathy-chat-window.c |   32 ++++++++++++++++++++++++--------
 1 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/src/empathy-chat-window.c b/src/empathy-chat-window.c
index 1912b1b..248a408 100644
--- a/src/empathy-chat-window.c
+++ b/src/empathy-chat-window.c
@@ -161,15 +161,32 @@ chat_window_close_clicked_cb (GtkAction   *action,
 }
 
 static void
-chat_window_close_button_style_set_cb (GtkWidget *button,
+chat_tab_style_set_cb (GtkWidget *hbox,
 				       GtkStyle  *previous_style,
 				       gpointer   user_data)
 {
-	gint h, w;
+	GtkWidget *button;
+	int char_width, h, w;
+	PangoContext *context;
+	PangoFontMetrics *metrics;
+
+	button = g_object_get_data (G_OBJECT (user_data),
+		"chat-window-tab-close-button");
+	context = gtk_widget_get_pango_context (hbox);
+
+	metrics = pango_context_get_metrics (context, hbox->style->font_desc,
+		pango_context_get_language (context));
+	char_width = pango_font_metrics_get_approximate_char_width (metrics);
+	pango_font_metrics_unref (metrics);
 
 	gtk_icon_size_lookup_for_settings (gtk_widget_get_settings (button),
 					   GTK_ICON_SIZE_MENU, &w, &h);
 
+	/* Request at least about 12 chars width plus at least space for the status
+	 * image and the close button */
+	gtk_widget_set_size_request (hbox,
+		12 * PANGO_PIXELS (char_width) + 2 * w, -1);
+
 	gtk_widget_set_size_request (button, w, h);
 }
 
@@ -243,12 +260,10 @@ chat_window_create_label (EmpathyChatWindow *window,
 	gtk_box_pack_start (GTK_BOX (hbox), event_box, TRUE, TRUE, 0);
 	gtk_box_pack_end (GTK_BOX (hbox), close_button, FALSE, FALSE, 0);
 
-	/* React to theme changes and also used to setup the initial size
-	 * correctly.
-	 */
-	g_signal_connect (close_button,
+	/* React to theme changes and also setup the size correctly.  */
+	g_signal_connect (hbox,
 			  "style-set",
-			  G_CALLBACK (chat_window_close_button_style_set_cb),
+			  G_CALLBACK (chat_tab_style_set_cb),
 			  chat);
 
 	g_signal_connect (close_button,
@@ -1353,7 +1368,8 @@ empathy_chat_window_init (EmpathyChatWindow *window)
 	priv->chatroom_manager = empathy_chatroom_manager_dup_singleton (NULL);
 
 	priv->notebook = gtk_notebook_new ();
- 	gtk_notebook_set_group (GTK_NOTEBOOK (priv->notebook), "EmpathyChatWindow");
+	gtk_notebook_set_group (GTK_NOTEBOOK (priv->notebook), "EmpathyChatWindow");
+	gtk_notebook_set_scrollable (GTK_NOTEBOOK (priv->notebook), TRUE);
 	gtk_box_pack_start (GTK_BOX (chat_vbox), priv->notebook, TRUE, TRUE, 0);
 	gtk_widget_show (priv->notebook);