Class gesture-rotate - cl-cffi-gtk3 API documentation

Package: gtk

Class gtk:gesture-rotate

Superclasses

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

Documented Subclasses

None

Direct Slots

None

Details

The gtk:gesture-rotate object is a gtk:gesture implementation able to recognize 2-finger rotations, whenever the angle between both handled sequences changes, the "angle-changed" signal is emitted.

Signal Details

The "angle-changed" signal

lambda (gesture angle delta)    :run-first

gesture: The gtk:gesture-rotate object that received the signal.
angle: The double float for the current angle in radians.
delta: The double float for the difference with the starting angle, in radians.

The signal is emitted when the angle between both tracked points changes.