Dock.connectPanelDragBegin

gulong connectPanelDragBegin(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] :  panel.widget.Widget)))
   && (Parameters!T.length <  2 || (ParameterStorageClassTuple!T[1]  ==  ParameterStorageClass.none &&  is(Parameters!T[1] :  panel.dock.Dock)))
   &&  Parameters!T.length <  3)

Connect to PanelDragBegin signal.

This signal is emitted when dragging of a panel begins.

Parameters

`callback`	signal callback delegate or function to connect `void callback(panel.widget.Widget panel, panel.dock.Dock dock)` `panel` a #PanelWidget (optional) `dock` 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