gtk:gesture-drag, gtk:gesture-single, gtk:gesture, gtk:event-controller, gobject:object, common-lisp:standard-object, common-lisp:t

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The gtk:gesture-pan class is a gtk:gesture implementation for pan gestures. These are drags that are locked to happen along one axis.

The axis that a gtk:gesture-pan object handles is defined at construct time, and can be changed through the gtk:gesture-pan-orientation function. When the gesture starts to be recognized, the gtk:gesture-pan object will attempt to determine as early as possible whether the sequence is moving in the expected direction, and denying the sequence if this does not happen. Once a panning gesture along the expected axis is recognized, the "pan" signal will be emitted as input events are received, containing the offset in the given axis.

The "pan" signal

lambda (gesture direction offset)    :run-last    

gesture

The gtk:gesture-pan object which received the signal.

direction

The current gtk:pan-direction value of the pan gesture.

offset

The double float with the offset along the gesture orientation.

The signal is emitted once a panning gesture along the expected axis is detected.