Package ch.bailu.gtk.gtk

Class GestureZoom

java.lang.Object

ch.bailu.gtk.type.Type

ch.bailu.gtk.type.Pointer

ch.bailu.gtk.gobject.Object

ch.bailu.gtk.gtk.EventController

ch.bailu.gtk.gtk.Gesture

ch.bailu.gtk.gtk.GestureZoom

All Implemented Interfaces:

PointerInterface

public class GestureZoom
extends Gesture

`GtkGestureZoom` is a `GtkGesture` for 2-finger pinch/zoom gestures.

Whenever the distance between both tracked sequences changes, the
[signal@Gtk.GestureZoom::scale-changed] signal is emitted to report
the scale factor.

https://docs.gtk.org/gtk4/class.GestureZoom.html

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	GestureZoom.OnScaleChanged

Nested classes/interfaces inherited from class ch.bailu.gtk.gtk.Gesture

Gesture.OnBegin, Gesture.OnCancel, Gesture.OnEnd, Gesture.OnSequenceStateChanged, Gesture.OnUpdate

Nested classes/interfaces inherited from class ch.bailu.gtk.gobject.Object

Object.OnBindingTransformFunc, Object.OnDestroyNotify, Object.OnDuplicateFunc, Object.OnNotify, Object.OnToggleNotify, Object.OnWeakNotify

Field Summary

Fields

Modifier and Type	Field	Description
static final String	SIGNAL_ON_SCALE_CHANGED

Fields inherited from class ch.bailu.gtk.gtk.Gesture

SIGNAL_ON_BEGIN, SIGNAL_ON_CANCEL, SIGNAL_ON_END, SIGNAL_ON_SEQUENCE_STATE_CHANGED, SIGNAL_ON_UPDATE

Fields inherited from class ch.bailu.gtk.gobject.Object

SIGNAL_ON_NOTIFY

Fields inherited from class ch.bailu.gtk.type.Pointer

NULL

Constructor Summary

Constructors

Constructor	Description
GestureZoom()	Returns a newly created `GtkGesture` that recognizes pinch/zoom gestures.
GestureZoom(PointerContainer pointer)

Method Summary

Modifier and Type	Method	Description
static ClassHandler	getClassHandler()
static int	getInstanceSize()
static long	getParentTypeID()
static TypeSystem.TypeSize	getParentTypeSize()
double	getScaleDelta()	Gets the scale delta.
static long	getTypeID()
static TypeSystem.TypeSize	getTypeSize()
SignalHandler	onScaleChanged(GestureZoom.OnScaleChanged signal)	Connect to signal "scale-changed".

Methods inherited from class ch.bailu.gtk.gtk.Gesture

getBoundingBox, getDevice, getGroup, getLastEvent, getLastUpdatedSequence, getSequences, getSequenceState, group, handlesSequence, isActive, isGroupedWith, isRecognized, onBegin, onCancel, onEnd, onSequenceStateChanged, onUpdate, setSequenceState, setState, ungroup

Methods inherited from class ch.bailu.gtk.gtk.EventController

getCurrentEvent, getCurrentEventDevice, getCurrentEventState, getCurrentEventTime, getName, getPropagationLimit, getPropagationPhase, getWidget, reset, setName, setName, setPropagationLimit, setPropagationPhase, setStaticName, setStaticName

Methods inherited from class ch.bailu.gtk.gobject.Object

addToggleRef, bindProperty, bindProperty, bindPropertyFull, bindPropertyFull, bindPropertyWithClosures, bindPropertyWithClosures, compatControl, connect, connect, disconnect, disconnect, dupData, dupData, dupQdata, forceFloating, freezeNotify, get, get, getData, getData, getProperty, getProperty, getQdata, interfaceFindProperty, interfaceInstallProperty, isFloating, notify, notify, notifyByPspec, onNotify, ref, refSink, removeToggleRef, replaceData, replaceData, replaceQdata, runDispose, set, set, setData, setData, setDataFull, setDataFull, setProperty, setProperty, setQdata, setQdataFull, stealData, stealData, stealQdata, takeRef, thawNotify, unref, watchClosure, weakRef, weakUnref

Methods inherited from class ch.bailu.gtk.type.Pointer

asCPointer, cast, connectSignal, disconnectSignals, disconnectSignals, equals, hashCode, throwIfNull, throwNullPointerException, toString, unregisterCallbacks, unregisterCallbacks

Methods inherited from class ch.bailu.gtk.type.Type

asCPointer, asCPointer, asCPointerNotNull, asJnaPointer, asJnaPointer, asPointer, asPointer, cast, cast, throwIfNull

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface ch.bailu.gtk.type.PointerInterface

asCPointerNotNull, asJnaPointer, asPointer, isNotNull, isNull

Field Details

SIGNAL_ON_SCALE_CHANGED

public static final String SIGNAL_ON_SCALE_CHANGED

See Also:

• Constant Field Values

Constructor Details

GestureZoom

public GestureZoom(PointerContainer pointer)

GestureZoom

public GestureZoom()

Returns a newly created `GtkGesture` that recognizes
pinch/zoom gestures.

Method Details

getClassHandler

public static ClassHandler getClassHandler()

getScaleDelta

public double getScaleDelta()

Gets the scale delta.

If @gesture is active, this function returns the zooming
difference since the gesture was recognized (hence the
starting point is considered 1:1). If @gesture is not
active, 1 is returned.

Returns:

the scale delta

onScaleChanged

public SignalHandler onScaleChanged(GestureZoom.OnScaleChanged signal)

Connect to signal "scale-changed".
See GestureZoom.OnScaleChanged.onScaleChanged(double) for signal description.
Field SIGNAL_ON_SCALE_CHANGED contains original signal name and can be used as resource reference.

Parameters:

signal - callback function (lambda).

Returns:

SignalHandler. Can be used to disconnect signal and to release callback function.

getTypeID

public static long getTypeID()

getParentTypeID

public static long getParentTypeID()

getTypeSize

public static TypeSystem.TypeSize getTypeSize()

getParentTypeSize

public static TypeSystem.TypeSize getParentTypeSize()

getInstanceSize

public static int getInstanceSize()