[glade3/signal-tree-model] Make GladeSignalModel a deligate of GladeWidget

[Johannes Schmid <jhs src gnome org>]

commit a4abbf6fea060cc6c160a668a86908bdf7ba2d2f
Author: Johannes Schmid <jhs gnome org>
Date:   Thu Dec 16 12:43:57 2010 +0100

    Make GladeSignalModel a deligate of GladeWidget

 gladeui/glade-signal-editor.c |   10 ++--------
 gladeui/glade-widget.c        |   24 +++++++++++++++++++++++-
 gladeui/glade-widget.h        |    6 ++++++
 3 files changed, 31 insertions(+), 9 deletions(-)
---
diff --git a/gladeui/glade-signal-editor.c b/gladeui/glade-signal-editor.c
index 9261da7..1420d50 100644
--- a/gladeui/glade-signal-editor.c
+++ b/gladeui/glade-signal-editor.c
@@ -314,15 +314,13 @@ glade_signal_editor_load_widget (GladeSignalEditor *editor,
 	}
 
 	gtk_tree_view_set_model (GTK_TREE_VIEW (priv->signal_tree), NULL);
-	if (priv->model)
-		g_object_unref (priv->model);
 	priv->model = NULL;
 
 	
 	if (!widget)
 		return;
 
-	priv->model = glade_signal_model_new (widget);
+	priv->model = glade_widget_get_signal_model (widget);
 	gtk_tree_view_set_model (GTK_TREE_VIEW (priv->signal_tree), priv->model);
 	g_object_set (priv->renderer_userdata, "model", glade_app_get_project (), NULL);
 }
@@ -364,10 +362,6 @@ glade_signal_editor_enable_dnd (GladeSignalEditor *editor, gboolean enabled)
 static void
 glade_signal_editor_dispose (GObject *object)
 {
-	GladeSignalEditor *self = GLADE_SIGNAL_EDITOR (object);
-	
-	glade_signal_editor_load_widget (self, NULL);
-
 	G_OBJECT_CLASS (glade_signal_editor_parent_class)->dispose (object);
 }
 
@@ -406,7 +400,7 @@ create_rich_drag_icon (GtkWidget* widget, const gchar* text)
 {
 	PangoLayout* layout = pango_layout_new (gtk_widget_get_pango_context (widget));
 	GdkPixmap* pixmap;
-	cairo_t cr;
+	cairo_t* cr;
 	gint width, height;
 	
 	pango_layout_set_text (layout, text, -1);
diff --git a/gladeui/glade-widget.c b/gladeui/glade-widget.c
index 6ef84f7..223f9b4 100644
--- a/gladeui/glade-widget.c
+++ b/gladeui/glade-widget.c
@@ -56,7 +56,7 @@
 #include "glade-app.h"
 #include "glade-design-view.h"
 #include "glade-widget-action.h"
-
+#include "glade-signal-model.h"
 
 
 static void         glade_widget_set_adaptor           (GladeWidget           *widget,
@@ -895,6 +895,11 @@ glade_widget_dispose (GObject *object)
 		g_list_foreach (widget->packing_actions, (GFunc)g_object_unref, NULL);
 		g_list_free (widget->packing_actions);
 	}
+	if (widget->signal_model)
+	{
+		g_object_unref (widget->signal_model);
+		widget->signal_model = NULL;
+	}
 	
 	G_OBJECT_CLASS (glade_widget_parent_class)->dispose (object);
 }
@@ -4483,3 +4488,20 @@ glade_widget_support_changed (GladeWidget *widget)
 
 	g_signal_emit (widget, glade_widget_signals[SUPPORT_CHANGED], 0);
 }
+
+/**
+ * glade_widget_get_signal_model:
+ * @widget: A #GladeWidget
+ * 
+ * Returns: a GtkTreeModel that can be used to view the widget's signals.
+ *          The signal model is owned by the #GladeWidget.
+ */
+GtkTreeModel *
+glade_widget_get_signal_model (GladeWidget *widget)
+{
+	if (!widget->signal_model)
+	{
+		widget->signal_model = glade_signal_model_new (widget);
+	}
+	return widget->signal_model;
+}
diff --git a/gladeui/glade-widget.h b/gladeui/glade-widget.h
index a4fdef9..4426992 100644
--- a/gladeui/glade-widget.h
+++ b/gladeui/glade-widget.h
@@ -107,6 +107,9 @@ struct _GladeWidget
 			       */
 	GList          *locked_widgets; /* A list of widgets this widget has locked down.
 					 */
+
+	GtkTreeModel   *signal_model; /* Signal model (or NULL if not yet requested) */
+
 	
 	/* Construct parameters: */
 	GladeWidget       *construct_template;
@@ -431,6 +434,9 @@ void                    glade_widget_unlock                 (GladeWidget      *w
 
 void                    glade_widget_support_changed        (GladeWidget      *widget);
 
+GtkTreeModel           *glade_widget_get_signal_model       (GladeWidget      *widget);
+
+
 G_END_DECLS
 
 #endif /* __GLADE_WIDGET_H__ */