[evolution] re-enable middle-click to open in new window with new actions

[Matthew Barnes <mbarnes src gnome org>]

commit 51cbd483d163138c3b570b01f0921f767ca64a7e
Author: Michael Meeks <michael meeks novell com>
Date:   Thu Mar 4 10:26:31 2010 +0000

    re-enable middle-click to open in new window with new actions

 shell/e-shell-switcher.c       |   56 +++++++++++++++++++++++++++++++++++-----
 shell/e-shell-switcher.h       |    3 +-
 shell/e-shell-window-actions.c |    3 +-
 3 files changed, 53 insertions(+), 9 deletions(-)
---
diff --git a/shell/e-shell-switcher.c b/shell/e-shell-switcher.c
index 226279e..7e82e55 100644
--- a/shell/e-shell-switcher.c
+++ b/shell/e-shell-switcher.c
@@ -551,31 +551,73 @@ e_shell_switcher_new (void)
 	return g_object_new (E_TYPE_SHELL_SWITCHER, NULL);
 }
 
+/*
+ * gtk+ doesn't give us what we want - a middle click,
+ * option on toolbar items, so we have to get it by force.
+ */
+static GtkButton *
+tool_item_get_button (GtkWidget *widget)
+{
+	GtkWidget *child;
+
+	g_return_val_if_fail (GTK_IS_TOOL_ITEM (widget), NULL);
+
+	child = GTK_BIN (widget)->child;
+	if (child != NULL && GTK_IS_BUTTON (child))
+		return GTK_BUTTON (child);
+	else
+		return NULL;
+}
+
+static gboolean
+tool_item_button_cb (GtkWidget      *internal_widget,
+		     GdkEventButton *event,
+		     GtkAction      *action)
+{
+	g_return_val_if_fail (GTK_IS_ACTION (action), FALSE);
+
+	if (event->button == 2) {
+		gtk_action_activate (action);
+		return TRUE;
+	}
+	return FALSE;
+}
+
 /**
  * e_shell_switcher_add_action:
  * @switcher: an #EShellSwitcher
- * @action: a #GtkAction
+ * @switch_action: a #GtkAction
+ * @new_window_action: a #GtkAction
  *
- * Adds a button to @switcher that proxies for @action.  Switcher buttons
- * appear in the order they were added.
+ * Adds a button to @switcher that proxies for @switcher_action.
+ * Switcher buttons appear in the order they were added. A middle
+ * click opens a new window of this type.  
  *
  * #EShellWindow adds switcher actions in the order given by the
  * <structfield>sort_order</structfield> field in #EShellBackendClass.
  **/
 void
 e_shell_switcher_add_action (EShellSwitcher *switcher,
-                             GtkAction *action)
+			     GtkAction      *switch_action,
+			     GtkAction      *new_window_action)
 {
 	GtkWidget *widget;
+	GtkButton *button;
 
 	g_return_if_fail (E_IS_SHELL_SWITCHER (switcher));
-	g_return_if_fail (GTK_IS_ACTION (action));
+	g_return_if_fail (GTK_IS_ACTION (switch_action));
+	g_return_if_fail (GTK_IS_ACTION (new_window_action));
 
-	g_object_ref (action);
-	widget = gtk_action_create_tool_item (action);
+	g_object_ref (switch_action);
+	widget = gtk_action_create_tool_item (switch_action);
 	gtk_tool_item_set_is_important (GTK_TOOL_ITEM (widget), TRUE);
 	gtk_widget_show (widget);
 
+	if ((button = tool_item_get_button (widget)) != NULL)
+		g_signal_connect (button, "button-release-event",
+				  G_CALLBACK (tool_item_button_cb),
+				  new_window_action);
+
 	switcher->priv->proxies = g_list_append (
 		switcher->priv->proxies, widget);
 
diff --git a/shell/e-shell-switcher.h b/shell/e-shell-switcher.h
index 1cc6445..dd3eddf 100644
--- a/shell/e-shell-switcher.h
+++ b/shell/e-shell-switcher.h
@@ -78,7 +78,8 @@ struct _EShellSwitcherClass {
 GType		e_shell_switcher_get_type	(void);
 GtkWidget *	e_shell_switcher_new		(void);
 void		e_shell_switcher_add_action	(EShellSwitcher *switcher,
-						 GtkAction *action);
+						 GtkAction      *switch_action,
+						 GtkAction      *new_window_action);
 GtkToolbarStyle	e_shell_switcher_get_style	(EShellSwitcher *switcher);
 void		e_shell_switcher_set_style	(EShellSwitcher *switcher,
 						 GtkToolbarStyle style);
diff --git a/shell/e-shell-window-actions.c b/shell/e-shell-window-actions.c
index 7a091a1..c2c5aea 100644
--- a/shell/e-shell-window-actions.c
+++ b/shell/e-shell-window-actions.c
@@ -2216,7 +2216,6 @@ e_shell_window_create_switcher_actions (EShellWindow *shell_window)
 
 		gtk_action_group_add_action_with_accel (
 			s_action_group, GTK_ACTION (s_action), accelerator);
-		e_shell_switcher_add_action (switcher, GTK_ACTION (s_action));
 
 		g_free (accelerator);
 
@@ -2237,6 +2236,8 @@ e_shell_window_create_switcher_actions (EShellWindow *shell_window)
 				  shell_window);
 		gtk_action_group_add_action (n_action_group, n_action);
 
+		e_shell_switcher_add_action (switcher, GTK_ACTION (s_action), n_action);
+
 		g_free (n_action_name);
 		g_free (tooltip);