Package org.gnome.gtk

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("io.github.jwharm.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 org.gnome.gtk.Gesture

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

Nested classes/interfaces inherited from class org.gnome.gtk.EventController

EventController.EventController$Impl, EventController.EventControllerClass

Nested classes/interfaces inherited from class org.gnome.gobject.GObject

GObject.NotifyCallback, GObject.ObjectClass

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected GestureZoom	asParent()	Returns 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.
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 org.gnome.gtk.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 org.gnome.gtk.EventController

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

Methods inherited from class org.gnome.gobject.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, getMemoryLayout, 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 org.gnome.gobject.TypeInstance

callParent, callParent, cast, getPrivate, readGClass, writeGClass

Methods inherited from class org.javagi.base.ProxyInstance

equals, handle, hashCode

Methods inherited from class java.lang.Object

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

Constructor Details

GestureZoom

public GestureZoom(MemorySegment address)

Create a GestureZoom proxy instance for the provided memory address.

Parameters:

address - the memory address of the native object

GestureZoom

public GestureZoom()

Creates a new GestureZoom.

Method Details

getType

public static @Nullable Type getType()

Get the GType of the GestureZoom class

Returns:

the GType

asParent

protected GestureZoom asParent()

Returns this instance as if it were its parent type. This is mostly synonymous to the Java super keyword, but will set the native typeclass function pointers to the parent type. When overriding a native virtual method in Java, "chaining up" with super.methodName() doesn't work, because it invokes the overridden function pointer again. To chain up, call asParent().methodName(). This will call the native function pointer of this virtual method in the typeclass of the parent type.

Overrides:

asParent in class Gesture

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(org.gnome.gtk.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