[evolution] Fix crash when second main window is closed.

[Matthew Barnes <mbarnes src gnome org>]

commit 369831e140c00a2578fb99c1e09fe369e80f0261
Author: Matthew Barnes <mbarnes redhat com>
Date:   Fri Sep 4 12:56:37 2009 -0400

    Fix crash when second main window is closed.

 shell/e-shell-content.c |   72 +++++++++++++++++++----------------------------
 shell/e-shell-view.c    |   12 ++++++++
 2 files changed, 41 insertions(+), 43 deletions(-)
---
diff --git a/shell/e-shell-content.c b/shell/e-shell-content.c
index 610a5b0..9e28bc8 100644
--- a/shell/e-shell-content.c
+++ b/shell/e-shell-content.c
@@ -50,10 +50,9 @@ struct _EShellContentPrivate {
 	gchar *system_filename;
 	gchar *user_filename;
 
-	/* Container for the following widgets */
 	GtkWidget *search_bar;
 
-	/* Search bar widgets */
+	/* Search bar children (not referenced) */
 	GtkWidget *filter_label;
 	GtkWidget *filter_combo_box;
 	GtkWidget *search_label;
@@ -508,46 +507,11 @@ shell_content_dispose (GObject *object)
 		priv->shell_view = NULL;
 	}
 
-	if (priv->search_bar != NULL) {
-		g_object_unref (priv->search_bar);
-		priv->search_bar = NULL;
-	}
-
-	if (priv->filter_label != NULL) {
-		g_object_unref (priv->filter_label);
-		priv->filter_label = NULL;
-	}
-
-	if (priv->filter_combo_box != NULL) {
-		g_object_unref (priv->filter_combo_box);
-		priv->filter_combo_box = NULL;
-	}
-
 	if (priv->search_context != NULL) {
 		g_object_unref (priv->search_context);
 		priv->search_context = NULL;
 	}
 
-	if (priv->search_label != NULL) {
-		g_object_unref (priv->search_label);
-		priv->search_label = NULL;
-	}
-
-	if (priv->search_entry != NULL) {
-		g_object_unref (priv->search_entry);
-		priv->search_entry = NULL;
-	}
-
-	if (priv->scope_label != NULL) {
-		g_object_unref (priv->scope_label);
-		priv->scope_label = NULL;
-	}
-
-	if (priv->scope_combo_box != NULL) {
-		g_object_unref (priv->scope_combo_box);
-		priv->scope_combo_box = NULL;
-	}
-
 	/* Chain up to parent's dispose() method. */
 	G_OBJECT_CLASS (parent_class)->dispose (object);
 }
@@ -617,6 +581,24 @@ shell_content_constructed (GObject *object)
 }
 
 static void
+shell_content_destroy (GtkObject *gtk_object)
+{
+	EShellContentPrivate *priv;
+
+	priv = E_SHELL_CONTENT_GET_PRIVATE (gtk_object);
+
+	if (priv->search_bar != NULL) {
+		gtk_widget_unparent (priv->search_bar);
+		gtk_widget_destroy (priv->search_bar);
+		g_object_unref (priv->search_bar);
+		priv->search_bar = NULL;
+	}
+
+	/* Chain up to parent's destroy() method. */
+	GTK_OBJECT_CLASS (parent_class)->destroy (gtk_object);
+}
+
+static void
 shell_content_size_request (GtkWidget *widget,
                             GtkRequisition *requisition)
 {
@@ -692,6 +674,7 @@ static void
 shell_content_class_init (EShellContentClass *class)
 {
 	GObjectClass *object_class;
+	GtkObjectClass *gtk_object_class;
 	GtkWidgetClass *widget_class;
 	GtkContainerClass *container_class;
 
@@ -705,6 +688,9 @@ shell_content_class_init (EShellContentClass *class)
 	object_class->finalize = shell_content_finalize;
 	object_class->constructed = shell_content_constructed;
 
+	gtk_object_class = GTK_OBJECT_CLASS (class);
+	gtk_object_class->destroy = shell_content_destroy;
+
 	widget_class = GTK_WIDGET_CLASS (class);
 	widget_class->size_request = shell_content_size_request;
 	widget_class->size_allocate = shell_content_size_allocate;
@@ -877,7 +863,7 @@ shell_content_init (EShellContent *shell_content)
 	 * "Important Messages", or "Active Appointments". */
 	widget = gtk_label_new_with_mnemonic (_("Sho_w:"));
 	gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
-	shell_content->priv->filter_label = g_object_ref (widget);
+	shell_content->priv->filter_label = widget;
 	gtk_widget_show (widget);
 
 	label = GTK_LABEL (widget);
@@ -885,7 +871,7 @@ shell_content_init (EShellContent *shell_content)
 	widget = e_action_combo_box_new ();
 	gtk_label_set_mnemonic_widget (label, widget);
 	gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
-	shell_content->priv->filter_combo_box = g_object_ref (widget);
+	shell_content->priv->filter_combo_box = widget;
 	gtk_widget_show (widget);
 
 	/* Search Entry Widgets */
@@ -902,7 +888,7 @@ shell_content_init (EShellContent *shell_content)
 	 * example: Search: [_______________] in [ Current Folder ] */
 	widget = gtk_label_new_with_mnemonic (_("Sear_ch:"));
 	gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
-	shell_content->priv->search_label = g_object_ref (widget);
+	shell_content->priv->search_label = widget;
 	gtk_widget_show (widget);
 
 	label = GTK_LABEL (widget);
@@ -910,7 +896,7 @@ shell_content_init (EShellContent *shell_content)
 	widget = e_hinted_entry_new ();
 	gtk_label_set_mnemonic_widget (label, widget);
 	gtk_box_pack_start (box, widget, TRUE, TRUE, 0);
-	shell_content->priv->search_entry = g_object_ref (widget);
+	shell_content->priv->search_entry = widget;
 	gtk_widget_show (widget);
 
 	g_signal_connect_swapped (
@@ -944,7 +930,7 @@ shell_content_init (EShellContent *shell_content)
 	 * example: Search: [_______________] in [ Current Folder ] */
 	widget = gtk_label_new_with_mnemonic (_("i_n"));
 	gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
-	shell_content->priv->scope_label = g_object_ref (widget);
+	shell_content->priv->scope_label = widget;
 	gtk_widget_show (widget);
 
 	label = GTK_LABEL (widget);
@@ -952,7 +938,7 @@ shell_content_init (EShellContent *shell_content)
 	widget = e_action_combo_box_new ();
 	gtk_label_set_mnemonic_widget (label, widget);
 	gtk_box_pack_start (box, widget, FALSE, FALSE, 0);
-	shell_content->priv->scope_combo_box = g_object_ref (widget);
+	shell_content->priv->scope_combo_box = widget;
 	gtk_widget_show (widget);
 }
 
diff --git a/shell/e-shell-view.c b/shell/e-shell-view.c
index ccd5de6..2d50300 100644
--- a/shell/e-shell-view.c
+++ b/shell/e-shell-view.c
@@ -353,6 +353,18 @@ shell_view_dispose (GObject *object)
 	}
 
 	if (priv->size_group != NULL) {
+		GSList *list;
+
+		/* Remove all widgets from the size group. */
+		list = gtk_size_group_get_widgets (priv->size_group);
+		list = g_slist_copy (list);
+
+		while (list != NULL) {
+			gtk_size_group_remove_widget (
+				priv->size_group, list->data);
+			list = g_slist_delete_link (list, list);
+		}
+
 		g_object_unref (priv->size_group);
 		priv->size_group = NULL;
 	}