GI.Gtk.Objects.GestureRotate

GestureRotate is a Gesture implementation able to recognize 2-finger rotations, whenever the angle between both handled sequences changes, the GestureRotate::angle-changed signal is emitted.

Exported types

newtype GestureRotate

Constructors

GestureRotate (ManagedPtr GestureRotate)

Instances

GObject GestureRotate

Methods

gobjectType :: GestureRotate -> IO GType

IsObject GestureRotate

IsGesture GestureRotate

IsEventController GestureRotate

IsGestureRotate GestureRotate

class GObject o => IsGestureRotate o

Instances

(GObject a, UnknownAncestorError Constraint GestureRotate a) => IsGestureRotate a

IsGestureRotate GestureRotate

toGestureRotate :: (MonadIO m, IsGestureRotate o) => o -> m GestureRotate

noGestureRotate :: Maybe GestureRotate

Methods

getAngleDelta

gestureRotateGetAngleDelta

Arguments

:: (HasCallStack, MonadIO m, IsGestureRotate a)

=> a

gesture: a GestureRotate

-> m Double

Returns: 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.

Since: 3.14

new

gestureRotateNew

Arguments

:: (HasCallStack, MonadIO m, IsWidget a)

=> a

widget: a Widget

-> m GestureRotate

Returns: a newly created GestureRotate

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

Since: 3.14

Signals

angleChanged

type C_GestureRotateAngleChangedCallback = Ptr () -> CDouble -> CDouble -> Ptr () -> IO ()

type GestureRotateAngleChangedCallback = Double -> Double -> IO ()

afterGestureRotateAngleChanged :: (IsGestureRotate a, MonadIO m) => a -> GestureRotateAngleChangedCallback -> m SignalHandlerId

genClosure_GestureRotateAngleChanged :: GestureRotateAngleChangedCallback -> IO Closure

mk_GestureRotateAngleChangedCallback :: C_GestureRotateAngleChangedCallback -> IO (FunPtr C_GestureRotateAngleChangedCallback)

noGestureRotateAngleChangedCallback :: Maybe GestureRotateAngleChangedCallback

onGestureRotateAngleChanged :: (IsGestureRotate a, MonadIO m) => a -> GestureRotateAngleChangedCallback -> m SignalHandlerId

wrap_GestureRotateAngleChangedCallback :: GestureRotateAngleChangedCallback -> Ptr () -> CDouble -> CDouble -> Ptr () -> IO ()