Eben Eliason
5cc6b27ae7
The drag-active property can be set to provide a highlight when the tray control is accepting target of an ongoing drag. We can't use the drag_highlight method because we desire to adjust the background of the widget, rather than drawing on top of it. Overriding these methods would work in most cases, but in cases where GTK+ calls drag_unhighlight itself things could break, so we use a property instead.
Sugar is the core of the OLPC Human Interface. The toolkit provides a set of widgets to build HIG compliant applications and interfaces to interact with system services like presence and the datastore.