Class GestureZoom

java.lang.Object

org.javagi.base.ProxyInstance

org.gnome.gobject.TypeInstance

org.gnome.gobject.GObject

org.gnome.gtk.EventController

org.gnome.gtk.Gesture

org.gnome.gtk.GestureZoom

All Implemented Interfaces:

Proxy

@Generated("org.javagi.JavaGI")
public class GestureZoom
extends Gesture

Recognizes 2-finger pinch/zoom gestures.

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

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	GestureZoom.Builder<B extends GestureZoom.Builder<B>>	Inner class implementing a builder pattern to construct a GObject with properties.
static class	GestureZoom.GestureZoomClass
static interface	GestureZoom.ScaleChangedCallback	Functional interface declaration of the ScaleChangedCallback callback.

Nested classes/interfaces inherited from class Gesture

Gesture.BeginCallback, Gesture.CancelCallback, Gesture.EndCallback, Gesture.Gesture$Impl, Gesture.GestureClass, Gesture.SequenceStateChangedCallback, Gesture.UpdateCallback

Nested classes/interfaces inherited from class EventController

EventController.EventController$Impl, EventController.EventControllerClass

Nested classes/interfaces inherited from class GObject

GObject.NotifyCallback, GObject.ObjectClass

Constructor Summary

Constructors

Constructor	Description
GestureZoom()	Create a new GestureZoom.
GestureZoom(MemorySegment address)	Create a GestureZoom instance for the provided memory address.

Method Summary

Modifier and Type	Method	Description
protected GestureZoom	asParent()	Return this instance as if it were its parent type.
static GestureZoom.Builder<? extends GestureZoom.Builder>	builder()	A GestureZoom.Builder object constructs a GestureZoom with the specified properties.
void	emitScaleChanged(double scale)	Emits the "scale-changed" signal.
static MemoryLayout	getMemoryLayout()	The memory layout of the native struct.
double	getScaleDelta()	Gets the scale delta.
static @Nullable Type	getType()	Get the GType of the GestureZoom class.
SignalConnection<GestureZoom.ScaleChangedCallback>	onScaleChanged(GestureZoom.ScaleChangedCallback handler)	Emitted whenever the distance between both tracked sequences changes.

Methods inherited from class Gesture

emitBegin, emitCancel, emitEnd, emitSequenceStateChanged, emitUpdate, getBoundingBox, getBoundingBoxCenter, getDevice, getGroup, getLastEvent, getLastUpdatedSequence, getPoint, getSequences, getSequenceState, group, handlesSequence, isActive, isGroupedWith, isRecognized, onBegin, onCancel, onEnd, onSequenceStateChanged, onUpdate, setSequenceState, setState, ungroup

Methods inherited from class EventController

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

Methods inherited from class GObject

addToggleRef, addWeakPointer, bindProperty, bindProperty, bindProperty, bindPropertyFull, bindPropertyFull, bindPropertyWithClosures, bindPropertyWithClosures, compatControl, connect, connect, connect, constructed, disconnect, dispatchPropertiesChanged, dispose, dupData, dupQdata, emit, emitNotify, finalize_, forceFloating, freezeNotify, get, getData, getProperty, getProperty, getProperty, getQdata, getv, interfaceFindProperty, interfaceInstallProperty, interfaceListProperties, isFloating, newInstance, newInstance, newv, notify, notify, notifyByPspec, onNotify, ref, refSink, removeToggleRef, removeWeakPointer, replaceData, replaceQdata, runDispose, set, setData, setDataFull, setProperty, setProperty, setProperty, setQdata, setQdataFull, setv, stealData, stealQdata, takeRef, thawNotify, unref, watchClosure, weakRef, weakUnref, withProperties

Methods inherited from class TypeInstance

callParent, callParent, cast, getPrivate, readGClass, writeGClass

Methods inherited from class ProxyInstance

equals, handle, hashCode

Methods inherited from class Object

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

Constructor Details

GestureZoom

public GestureZoom(MemorySegment address)

Create a GestureZoom instance for the provided memory address.

Parameters:

address - the memory address of the native object

GestureZoom

public GestureZoom()

Create a new GestureZoom.

Method Details

getType

public static @Nullable Type getType()

Get the GType of the GestureZoom class.

Returns:

the GType

getMemoryLayout

public static MemoryLayout getMemoryLayout()

The memory layout of the native struct.

Returns:

the memory layout

asParent

protected GestureZoom asParent()

Return this instance as if it were its parent type. Comparable to the Java super keyword, but ensures the parent typeclass is also used in native code.

Overrides:

asParent in class Gesture

Returns:

the instance as if it were its parent type

getScaleDelta

public double getScaleDelta()

Gets the scale delta.

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

Returns:

the scale delta

onScaleChanged

public SignalConnection<GestureZoom.ScaleChangedCallback> onScaleChanged(GestureZoom.ScaleChangedCallback handler)

Emitted whenever the distance between both tracked sequences changes.

Parameters:

handler - the signal handler

Returns:

a signal handler ID to keep track of the signal connection

See Also:

• GestureZoom.ScaleChangedCallback.run(double)

emitScaleChanged

public void emitScaleChanged(double scale)

Emits the "scale-changed" signal. See onScaleChanged(GestureZoom.ScaleChangedCallback).

builder

public static GestureZoom.Builder<? extends GestureZoom.Builder> builder()

A GestureZoom.Builder object constructs a GestureZoom with the specified properties. Use the various set...() methods to set properties, and finish construction with GestureZoom.Builder.build().

Returns:

the builder object