Gtk.Widget::drag-data-get

function callback(widget, context:Gdk.DragContext, data:Gtk.SelectionData, info:Number, time:Number, ):void;

The ::drag-data-get signal is emitted on the drag source when the drop site requests the data which is dragged. It is the responsibility of the signal handler to fill data with the data in the format which is indicated by info. See Gtk.SelectionData.prototype.set and Gtk.SelectionData.prototype.set_text.

widget: instance of Gtk.Widget that is emitting the signal
context: the drag context
data: the Gtk.SelectionData to be filled with the dragged data
info: the info that has been registered with the target in the Gtk.TargetList
time: the timestamp at which the data was requested