Gesture.connectBegin

gulong connectBegin(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.event_sequence.EventSequence)))
   && (Parameters!T.length <  2 || (ParameterStorageClassTuple!T[1]  ==  ParameterStorageClass.none &&  is(Parameters!T[1] :  gtk.gesture.Gesture)))
   &&  Parameters!T.length <  3)

Connect to Begin signal.

Emitted when the gesture is recognized.

This means the number of touch sequences matches propertyGtk.Gesture:n-points.

Note

These conditions may also happen when an extra touch

(eg. a third touch on a 2-touches gesture) is lifted, in that situation sequence won't pertain to the current set of active touches, so don't rely on this being true.

Parameters

`callback`	signal callback delegate or function to connect `void callback(gdk.event_sequence.EventSequence sequence, gtk.gesture.Gesture gesture)` `sequence` the [gdk.event_sequence.EventSequence] that made the gesture to be recognized (optional) `gesture` 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