Turns Source List into a drag source.
This enables items that implement Granite.Widgets.SourceListDragSource to be dragged outside the Source List and drop data into external widgets.
src_entries |
an array of Gtk.TargetEntrys indicating the targets that the drag will support. |
0.3
Granite.Widgets.SourceListDragSource, Granite.Widgets.SourceList.disable_drag_source