Gtk.Gesture_Rotate

Description

Recognizes 2-finger rotation gestures.

Whenever the angle between both handled sequences changes, the [signalGtk.GestureRotate::angle-changed] signal is emitted.

Cb_GObject_Gdouble_Gdouble_Void

type Cb_GObject_Gdouble_Gdouble_Void is not null access procedure
  (Self        : access Glib.Object.GObject_Record'Class;
   Angle       : Gdouble;
   Angle_Delta : Gdouble);

Parameters

Self

Angle

Angle_Delta

Cb_Gtk_Gesture_Rotate_Gdouble_Gdouble_Void

type Cb_Gtk_Gesture_Rotate_Gdouble_Gdouble_Void is not null access procedure
  (Self        : access Gtk_Gesture_Rotate_Record'Class;
   Angle       : Gdouble;
   Angle_Delta : Gdouble);

Parameters

Self

Angle

Angle_Delta

Get_Angle_Delta

function Get_Angle_Delta
   (Self : not null access Gtk_Gesture_Rotate_Record) return Gdouble

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.

Parameters

Self

Return Value

the angle delta in radians

Get_Type

function Get_Type return Glib.GType

Return Value

Gtk_Gesture_Rotate

type Gtk_Gesture_Rotate is access all Gtk_Gesture_Rotate_Record'Class;

Gtk_Gesture_Rotate_New

function Gtk_Gesture_Rotate_New return Gtk_Gesture_Rotate

Returns a newly created GtkGesture that recognizes 2-touch rotation gestures.

Return Value

Gtk_Gesture_Rotate_Record

type Gtk_Gesture_Rotate_Record is new Gtk_Gesture_Record with null record;

Gtk_New

procedure Gtk_New (Self : out Gtk_Gesture_Rotate)

Returns a newly created GtkGesture that recognizes 2-touch rotation gestures. Initialize does nothing if the object was already created with another call to Initialize* or G_New.

Parameters

Self

Initialize

procedure Initialize
   (Self : not null access Gtk_Gesture_Rotate_Record'Class)

Returns a newly created GtkGesture that recognizes 2-touch rotation gestures. Initialize does nothing if the object was already created with another call to Initialize* or G_New.

Parameters

Self

On_Angle_Changed

procedure On_Angle_Changed
   (Self  : not null access Gtk_Gesture_Rotate_Record;
    Call  : Cb_GObject_Gdouble_Gdouble_Void;
    Slot  : not null access Glib.Object.GObject_Record'Class;
    After : Boolean := False)

Emitted when the angle between both tracked points changes.

Callback parameters: -- @param Angle Current angle in radians -- @param Angle_Delta Difference with the starting angle, in radians

Parameters

Self

Call

Slot

After

On_Angle_Changed

procedure On_Angle_Changed
   (Self  : not null access Gtk_Gesture_Rotate_Record;
    Call  : Cb_Gtk_Gesture_Rotate_Gdouble_Gdouble_Void;
    After : Boolean := False)

Emitted when the angle between both tracked points changes.

Callback parameters: -- @param Angle Current angle in radians -- @param Angle_Delta Difference with the starting angle, in radians

Parameters

Self

Call

After

Signal_Angle_Changed

Signal_Angle_Changed : constant Glib.Signal_Name := "angle-changed";

Emitted when the angle between both tracked points changes.

Callback parameters: -- @param Angle Current angle in radians -- @param Angle_Delta Difference with the starting angle, in radians