Description

Gnome::Gtk4::GestureRotate is a Gnome::Gtk4::Gesture for 2-finger rotations.

Whenever the angle between both handled sequences changes, the angle-changed signal is emitted.

Uml Diagram

Class initialization

new

:native-object

Create an object using a native object from an object of the same type found elsewhere. See also Gnome::N::TopLevelSupportClass.

multi method new ( N-Object() :$native-object! )

new-gesturerotate

Returns a newly created Gnome::Gtk4::Gesture that recognizes 2-touch rotation gestures.

method new-gesturerotate ( --> Gnome::Gtk4::GestureRotate )

Methods

get-angle-delta

Gets the angle delta in radians.

If $gesture is active, this function returns the angle difference in radians since the gesture was first recognized. If $gesture is not active, 0 is returned.

method get-angle-delta (--> Num )

Return value; the angle delta in radians.

Signals

angle-changed

Emitted when the angle between both tracked points changes.

method handler (
  gdouble $angle,
  gdouble $angle-delta,
  Int :$_handle_id,
  N-GObject :$_native-object,
  Gnome::Gtk4::GestureRotate :$_widget,
  *%user-options
)

• $angle; Current angle in radians.

• $angle-delta; Difference with the starting angle, in radians.

• $_handle_id; The registered event handler id.

• $_native-object; The native object provided by the Raku object which registered this event. This is a native Gnome::Gtk4::GestureRotate object.

• %user-options; A list of named arguments provided by .register-signal() in class Object.