Banshee.Sources.Gui.SourceView.OnExposeEvent C# (CSharp) Method

        protected override bool OnExposeEvent (Gdk.EventExpose evnt)
        {
            if (need_resort) {
                need_resort = false;

                // Resort the tree store. This is performed in an event handler
                // known not to conflict with gtk_tree_view_bin_expose() to prevent
                // errors about corrupting the TreeView's internal state.
                foreach (Source dsource in ServiceManager.SourceManager.Sources) {
                    TreeIter iter = store.FindSource (dsource);
                    if (!TreeIter.Zero.Equals (iter) &&
                        (int)store.GetValue (iter, (int)SourceModel.Columns.Order) != dsource.Order)
                    {
                        store.SetValue (iter, (int)SourceModel.Columns.Order, dsource.Order);
                    }
                }
                QueueDraw ();
            }

            try {
                cr = Gdk.CairoHelper.Create (evnt.Window);
                base.OnExposeEvent (evnt);
                if (Hyena.PlatformDetection.IsMeeGo) {
                    theme.DrawFrameBorder (cr, new Gdk.Rectangle (0, 0,
                        Allocation.Width, Allocation.Height));
                }
                return true;
            } finally {
                CairoExtensions.DisposeContext (cr);
                cr = null;
            }
        }