Sets up a widget so that GTK+ will start a drag operation when the user clicks and drags on the widget. The widget must have a window.
the bitmask of buttons that can start the drag
the table of targets that the drag will support, may be %NULL
the bitmask of possible actions for a drag from this widget
See Implementation
Sets up a widget so that GTK+ will start a drag operation when the user clicks and drags on the widget. The widget must have a window.