GI.Gtk.Objects.GestureRotate

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

Exported types

newtype GestureRotate

Memory-managed wrapper type.

Constructors

GestureRotate (ManagedPtr GestureRotate)

Instances

Eq GestureRotate

Defined in GI.Gtk.Objects.GestureRotate

Methods

(==) :: GestureRotate -> GestureRotate -> Bool

(/=) :: GestureRotate -> GestureRotate -> Bool

GObject GestureRotate

Defined in GI.Gtk.Objects.GestureRotate

ManagedPtrNewtype GestureRotate

Defined in GI.Gtk.Objects.GestureRotate

Methods

toManagedPtr :: GestureRotate -> ManagedPtr GestureRotate

TypedObject GestureRotate

Defined in GI.Gtk.Objects.GestureRotate

Methods

glibType :: IO GType

HasParentTypes GestureRotate

Defined in GI.Gtk.Objects.GestureRotate

IsGValue (Maybe GestureRotate)

Convert GestureRotate to and from GValue. See toGValue and fromGValue.

Defined in GI.Gtk.Objects.GestureRotate

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe GestureRotate -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe GestureRotate)

type ParentTypes GestureRotate

Defined in GI.Gtk.Objects.GestureRotate

type ParentTypes GestureRotate = '[Gesture, EventController, Object]

class (GObject o, IsDescendantOf GestureRotate o) => IsGestureRotate o

Type class for types which can be safely cast to GestureRotate, for instance with toGestureRotate.

Instances

(GObject o, IsDescendantOf GestureRotate o) => IsGestureRotate o

Defined in GI.Gtk.Objects.GestureRotate

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

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

Methods

Click to display all available methods, including inherited ones

Methods

bindProperty, bindPropertyFull, forceFloating, freezeNotify, getv, group, handleEvent, handlesSequence, isActive, isFloating, isGroupedWith, isRecognized, notify, notifyByPspec, ref, refSink, reset, runDispose, stealData, stealQdata, thawNotify, ungroup, unref, watchClosure.

Getters

getAngleDelta, getBoundingBox, getBoundingBoxCenter, getData, getDevice, getGroup, getLastEvent, getLastUpdatedSequence, getPoint, getPropagationPhase, getProperty, getQdata, getSequenceState, getSequences, getWidget, getWindow.

Setters

setData, setDataFull, setPropagationPhase, setProperty, setSequenceState, setState, setWindow.

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 for the callback on the (unwrapped) C side.

type GestureRotateAngleChangedCallback

Arguments

 = Double

angle: Current angle in radians

-> Double

angleDelta: Difference with the starting angle, in radians

-> IO ()

This signal is emitted when the angle between both tracked points changes.

Since: 3.14

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

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

after gestureRotate #angleChanged callback

genClosure_GestureRotateAngleChanged :: MonadIO m => GestureRotateAngleChangedCallback -> m (GClosure C_GestureRotateAngleChangedCallback)

Wrap the callback into a GClosure.

mk_GestureRotateAngleChangedCallback :: C_GestureRotateAngleChangedCallback -> IO (FunPtr C_GestureRotateAngleChangedCallback)

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

noGestureRotateAngleChangedCallback :: Maybe GestureRotateAngleChangedCallback

A convenience synonym for Nothing :: Maybe GestureRotateAngleChangedCallback.

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

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

on gestureRotate #angleChanged callback

wrap_GestureRotateAngleChangedCallback :: GestureRotateAngleChangedCallback -> C_GestureRotateAngleChangedCallback

Wrap a GestureRotateAngleChangedCallback into a C_GestureRotateAngleChangedCallback.