DragSource.connectDragBegin

gulong connectDragBegin(T)(T callback,  Flag!"After" after =  No.After) if (isCallable!T
    &&  is(ReturnType!T ==  void)
   && (Parameters!T.length <  1 || (ParameterStorageClassTuple!T[0]  ==  ParameterStorageClass.none &&  is(Parameters!T[0] :  gdk.drag.Drag)))
   && (Parameters!T.length <  2 || (ParameterStorageClassTuple!T[1]  ==  ParameterStorageClass.none &&  is(Parameters!T[1] :  gtk.drag_source.DragSource)))
   &&  Parameters!T.length <  3)

Connect to DragBegin signal.

Emitted on the drag source when a drag is started.

It can be used to e.g. set a custom drag icon with [gtk.drag_source.DragSource.setIcon].

Parameters

`callback`	signal callback delegate or function to connect `void callback(gdk.drag.Drag drag, gtk.drag_source.DragSource dragSource)` `drag` the [gdk.drag.Drag] object (optional) `dragSource` the instance the signal is connected to (optional)
`after`	Yes.After to execute callback after default handler, No.After to execute before (default)

Returns

Signal ID