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

gtk-gesture-drag is a gtk-gesture implementation that recognizes drag operations. The drag operation itself can be tracked throught the "drag-begin", "drag-update" and "drag-end" signals, or the relevant coordinates be extracted through the functions gtk-gesture-drag-offset and gtk-gesture-drag-start-point.

The "drag-begin" signal

 lambda (gesture start-x start-y)    :run-last      

The signal is emitted whenever dragging starts.

gesture

The gtk-gesture-drag object which received the signal.

start-x

A double float with the x coordinate, relative to the widget allocation.

start-y

A double float with the y coordinate, relative to the widget allocation.

The "drag-end" signal

 lambda (gesture offset-x offset-y)    :run-last      

The signal is emitted whenever the dragging is finished.

gesture

The gtk-gesture-drag object which received the signal.

offset-x

A double float with the x offset, relative to the start point.

offset-y

A double float with the y offset, relative to the start point.

The "drag-update" signal

 lambda (gesture offset-x offset-y)    :run-last      

The signal is emitted whenever the dragging point moves.

gesture

The gtk-gesture-drag object which received the signal.

offset-x

A double float with the x offset, relative to the start point.

offset-y

A double float with the y offset, relative to the start point.