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
PanAction is a GestureAction-subclass that implements the panning concept for scrollable actors, with the ability to emit interpolated signals to emulate the kinetic inertia of the panning. PanAction provides: • pan signal, notifying users of the panning gesture status; • pan-stopped signal, emitted at the end of the interpolated phase of the panning gesture, if enabled; • pan-axis property, to allow constraining the dragging to a specific axis; • interpolated property, to enable or disable the inertial behaviour; • deceleration property, to customize the rate at which the momentum of the panning will be slowed down; • acceleration-factor property, applied to the inertial momentum when starting the interpolated sequence. An interactive test is also provided. https://bugzilla.gnome.org/show_bug.cgi?id=681648