Copyright	Will Thompson Iñaki García Etxebarria and Jonas Platte
License	LGPL-2.1
Maintainer	Iñaki García Etxebarria
Safe Haskell	None
Language	Haskell2010

GI.Gtk.Objects.GestureSwipe

Contents

Exported types
Methods
Signals
- swipe

Description

GestureSwipe is a Gesture implementation able to recognize swipes, after a press/move/.../move/release sequence happens, the 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 update handler.

All velocities are reported in pixels/sec units.

Synopsis

newtype GestureSwipe = GestureSwipe (ManagedPtr GestureSwipe)
class (GObject o, IsDescendantOf GestureSwipe o) => IsGestureSwipe o
toGestureSwipe :: (MonadIO m, IsGestureSwipe o) => o -> m GestureSwipe
noGestureSwipe :: Maybe GestureSwipe
gestureSwipeGetVelocity :: (HasCallStack, MonadIO m, IsGestureSwipe a) => a -> m (Bool, Double, Double)
gestureSwipeNew :: (HasCallStack, MonadIO m, IsWidget a) => a -> m GestureSwipe
type C_GestureSwipeSwipeCallback = Ptr () -> CDouble -> CDouble -> Ptr () -> IO ()
type GestureSwipeSwipeCallback = Double -> Double -> IO ()
afterGestureSwipeSwipe :: (IsGestureSwipe a, MonadIO m) => a -> GestureSwipeSwipeCallback -> m SignalHandlerId
genClosure_GestureSwipeSwipe :: MonadIO m => GestureSwipeSwipeCallback -> m (GClosure C_GestureSwipeSwipeCallback)
mk_GestureSwipeSwipeCallback :: C_GestureSwipeSwipeCallback -> IO (FunPtr C_GestureSwipeSwipeCallback)
noGestureSwipeSwipeCallback :: Maybe GestureSwipeSwipeCallback
onGestureSwipeSwipe :: (IsGestureSwipe a, MonadIO m) => a -> GestureSwipeSwipeCallback -> m SignalHandlerId
wrap_GestureSwipeSwipeCallback :: GestureSwipeSwipeCallback -> C_GestureSwipeSwipeCallback

Exported types

newtype GestureSwipe Source #

Memory-managed wrapper type.

Constructors

GestureSwipe (ManagedPtr GestureSwipe)

Instances

Instances details

Eq GestureSwipe Source #
Instance details Defined in GI.Gtk.Objects.GestureSwipe Methods (==) :: GestureSwipe -> GestureSwipe -> Bool # (/=) :: GestureSwipe -> GestureSwipe -> Bool #
IsGValue GestureSwipe Source #	Convert `GestureSwipe` to and from `GValue` with `toGValue` and `fromGValue`.
Instance details Defined in GI.Gtk.Objects.GestureSwipe Methods toGValue :: GestureSwipe -> IO GValue # fromGValue :: GValue -> IO GestureSwipe #
GObject GestureSwipe Source #
Instance details Defined in GI.Gtk.Objects.GestureSwipe Methods gobjectType :: IO GType #
HasParentTypes GestureSwipe Source #
Instance details Defined in GI.Gtk.Objects.GestureSwipe
type ParentTypes GestureSwipe Source #
Instance details Defined in GI.Gtk.Objects.GestureSwipe type ParentTypes GestureSwipe = '[GestureSingle, Gesture, EventController, Object]

class (GObject o, IsDescendantOf GestureSwipe o) => IsGestureSwipe o Source #

Type class for types which can be safely cast to GestureSwipe, for instance with toGestureSwipe.

Instances

Instances details

(GObject o, IsDescendantOf GestureSwipe o) => IsGestureSwipe o Source #
Instance details Defined in GI.Gtk.Objects.GestureSwipe

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

Cast to GestureSwipe, for types for which this is known to be safe. For general casts, use castTo.

noGestureSwipe :: Maybe GestureSwipe Source #

A convenience alias for Nothing :: Maybe GestureSwipe.

Methods

Overloaded methods

getVelocity

gestureSwipeGetVelocity Source #

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 Source #

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 () Source #

Type for the callback on the (unwrapped) C side.

type GestureSwipeSwipeCallback Source #

Arguments

= Double	`velocityX`: velocity in the X axis, in pixels/sec
-> Double	`velocityY`: velocity in the Y axis, in pixels/sec
-> IO ()

This signal is emitted when the recognized gesture is finished, velocity and direction are a product of previously recorded events.

Since: 3.14

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

Connect a signal handler for the swipe signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after gestureSwipe #swipe callback

genClosure_GestureSwipeSwipe :: MonadIO m => GestureSwipeSwipeCallback -> m (GClosure C_GestureSwipeSwipeCallback) Source #

Wrap the callback into a GClosure.

mk_GestureSwipeSwipeCallback :: C_GestureSwipeSwipeCallback -> IO (FunPtr C_GestureSwipeSwipeCallback) Source #

Generate a function pointer callable from C code, from a C_GestureSwipeSwipeCallback.

noGestureSwipeSwipeCallback :: Maybe GestureSwipeSwipeCallback Source #

A convenience synonym for Nothing :: Maybe GestureSwipeSwipeCallback.

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

Connect a signal handler for the swipe signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on gestureSwipe #swipe callback

wrap_GestureSwipeSwipeCallback :: GestureSwipeSwipeCallback -> C_GestureSwipeSwipeCallback Source #

Wrap a GestureSwipeSwipeCallback into a C_GestureSwipeSwipeCallback.