GestureZoom.connectScaleChanged

gulong connectScaleChanged(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]  ==  double)))
   && (Parameters!T.length <  2 || (ParameterStorageClassTuple!T[1]  ==  ParameterStorageClass.none &&  is(Parameters!T[1] :  gtk.gesture_zoom.GestureZoom)))
   &&  Parameters!T.length <  3)

Connect to ScaleChanged signal.

Emitted whenever the distance between both tracked sequences changes.

Parameters

`callback`	signal callback delegate or function to connect `void callback(double scale, gtk.gesture_zoom.GestureZoom gestureZoom)` `scale` Scale delta, taking the initial state as 1:1 (optional) `gestureZoom` 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