GI.Gtk.Objects.GestureSwipe

GestureSwipe is a Gesture implementation able to recognize swipes, after a press/move/.../move/release sequence happens, the GestureSwipe::swipe signal will be emitted, providing the velocity and directionality of the sequence at the time it was lifted.

If the velocity is desired in intermediate points, gestureSwipeGetVelocity can be called on eg. a Gesture::update handler.

All velocities are reported in pixels/sec units.

Exported types

newtype GestureSwipe

Constructors

GestureSwipe (ManagedPtr GestureSwipe)

Instances

GObject GestureSwipe

Methods

gobjectType :: GestureSwipe -> IO GType

IsObject GestureSwipe

IsGestureSingle GestureSwipe

IsGesture GestureSwipe

IsEventController GestureSwipe

IsGestureSwipe GestureSwipe

class GObject o => IsGestureSwipe o

Instances

(GObject a, UnknownAncestorError Constraint GestureSwipe a) => IsGestureSwipe a

IsGestureSwipe GestureSwipe

toGestureSwipe :: (MonadIO m, IsGestureSwipe o) => o -> m GestureSwipe

noGestureSwipe :: Maybe GestureSwipe

Methods

getVelocity

gestureSwipeGetVelocity

Arguments

:: (HasCallStack, MonadIO m, IsGestureSwipe a)

=> a

gesture: a GestureSwipe

-> m (Bool, Double, Double)

Returns: whether velocity could be calculated

If the gesture is recognized, this function returns True and fill in velocityX and velocityY with the recorded velocity, as per the last event(s) processed.

Since: 3.14

new

gestureSwipeNew

Arguments

:: (HasCallStack, MonadIO m, IsWidget a)

=> a

widget: a Widget

-> m GestureSwipe

Returns: a newly created GestureSwipe

Returns a newly created Gesture that recognizes swipes.

Since: 3.14

Signals

swipe

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

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

afterGestureSwipeSwipe :: (IsGestureSwipe a, MonadIO m) => a -> GestureSwipeSwipeCallback -> m SignalHandlerId

genClosure_GestureSwipeSwipe :: GestureSwipeSwipeCallback -> IO Closure

mk_GestureSwipeSwipeCallback :: C_GestureSwipeSwipeCallback -> IO (FunPtr C_GestureSwipeSwipeCallback)

noGestureSwipeSwipeCallback :: Maybe GestureSwipeSwipeCallback

onGestureSwipeSwipe :: (IsGestureSwipe a, MonadIO m) => a -> GestureSwipeSwipeCallback -> m SignalHandlerId

wrap_GestureSwipeSwipeCallback :: GestureSwipeSwipeCallback -> Ptr () -> CDouble -> CDouble -> Ptr () -> IO ()