Module javafx.graphics

Package javafx.scene.input

Class ZoomEvent

java.lang.Object

java.util.EventObject

javafx.event.Event

javafx.scene.input.InputEvent

javafx.scene.input.GestureEvent

javafx.scene.input.ZoomEvent

All Implemented Interfaces:

Serializable, Cloneable

public final class ZoomEvent
extends GestureEvent

Zoom event indicates that user performed zooming gesture such as dragging two fingers apart on track pad, touch screen or other similar device.

The event is delivered to the top-most node picked on the gesture coordinates in time of the gesture start - the whole gesture is delivered to the same node even if the coordinates change during the gesture.

The event provides two values: zoomFactor is the zooming amount of this event, totalZoomFactor is the zooming amount of the whole gesture. The values work well when multiplied with the node's scale properties (values greater than 1 for zooming in).

As all gestures, zooming can be direct (performed directly at the concrete coordinates as on touch screen - the center point among all the touches is usually used as the gesture coordinates) or indirect (performed indirectly as on track pad - the mouse cursor location is usually used as the gesture coordinates).

The gesture's ZOOM events are surounded by ZOOM_STARTED and ZOOM_FINISHED events. If zooming inertia is active on the given platform, some ZOOM events with isInertia() returning true can come after ZOOM_FINISHED.

Since:

JavaFX 2.2

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final EventType<ZoomEvent>	ANY	Common supertype for all zoom event types.
static final EventType<ZoomEvent>	ZOOM	This event occurs when user performs a zooming gesture such as dragging two fingers apart.
static final EventType<ZoomEvent>	ZOOM_FINISHED	This event occurs when a zooming gesture ends.
static final EventType<ZoomEvent>	ZOOM_STARTED	This event occurs when a zooming gesture is detected.

Fields declared in class javafx.event.Event

consumed, eventType, NULL_SOURCE_TARGET, target

Fields declared in class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
ZoomEvent(Object source, EventTarget target, EventType<ZoomEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double zoomFactor, double totalZoomFactor, PickResult pickResult)	Constructs new ZoomEvent event.
ZoomEvent(EventType<ZoomEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double zoomFactor, double totalZoomFactor, PickResult pickResult)	Constructs new ZoomEvent event with null source and target.

Method Summary

Modifier and Type	Method	Description
ZoomEvent	copyFor(Object newSource, EventTarget newTarget)	Creates and returns a copy of this event with the specified event source and target.
ZoomEvent	copyFor(Object newSource, EventTarget newTarget, EventType<ZoomEvent> type)	Creates a copy of the given event with the given fields substituted.
EventType<ZoomEvent>	getEventType()	Gets the event type of this event.
double	getTotalZoomFactor()	Gets the zooming amount of this gesture.
double	getZoomFactor()	Gets the zooming amount of this event.
String	toString()	Returns a string representation of this ZoomEvent object.

Methods declared in class javafx.scene.input.GestureEvent

getPickResult, getSceneX, getSceneY, getScreenX, getScreenY, getX, getY, getZ, isAltDown, isControlDown, isDirect, isInertia, isMetaDown, isShiftDown, isShortcutDown

Methods declared in class javafx.event.Event

clone, consume, fireEvent, getTarget, isConsumed

Methods declared in class java.util.EventObject

getSource

Methods declared in class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

ANY

public static final EventType<ZoomEvent> ANY

Common supertype for all zoom event types.

ZOOM

public static final EventType<ZoomEvent> ZOOM

This event occurs when user performs a zooming gesture such as dragging two fingers apart.

ZOOM_STARTED

public static final EventType<ZoomEvent> ZOOM_STARTED

This event occurs when a zooming gesture is detected.

ZOOM_FINISHED

public static final EventType<ZoomEvent> ZOOM_FINISHED

This event occurs when a zooming gesture ends.

Constructor Details

ZoomEvent

public ZoomEvent(Object source,
 EventTarget target,
 EventType<ZoomEvent> eventType,
 double x,
 double y,
 double screenX,
 double screenY,
 boolean shiftDown,
 boolean controlDown,
 boolean altDown,
 boolean metaDown,
 boolean direct,
 boolean inertia,
 double zoomFactor,
 double totalZoomFactor,
 PickResult pickResult)

Constructs new ZoomEvent event.

Parameters:

source - the source of the event. Can be null.

target - the target of the event. Can be null.

eventType - The type of the event.

x - The x with respect to the scene.

y - The y with respect to the scene.

screenX - The x coordinate relative to screen.

screenY - The y coordinate relative to screen.

shiftDown - true if shift modifier was pressed.

controlDown - true if control modifier was pressed.

altDown - true if alt modifier was pressed.

metaDown - true if meta modifier was pressed.

direct - true if the event was caused by direct input device. See GestureEvent.isDirect()

inertia - if represents inertia of an already finished gesture.

zoomFactor - zoom amount

totalZoomFactor - cumulative zoom amount

pickResult - pick result. Can be null, in this case a 2D pick result without any further values is constructed based on the scene coordinates and the target

Since:

JavaFX 8.0

ZoomEvent

public ZoomEvent(EventType<ZoomEvent> eventType,
 double x,
 double y,
 double screenX,
 double screenY,
 boolean shiftDown,
 boolean controlDown,
 boolean altDown,
 boolean metaDown,
 boolean direct,
 boolean inertia,
 double zoomFactor,
 double totalZoomFactor,
 PickResult pickResult)

Constructs new ZoomEvent event with null source and target.

Parameters:

eventType - The type of the event.

x - The x with respect to the scene.

y - The y with respect to the scene.

screenX - The x coordinate relative to screen.

screenY - The y coordinate relative to screen.

shiftDown - true if shift modifier was pressed.

controlDown - true if control modifier was pressed.

altDown - true if alt modifier was pressed.

metaDown - true if meta modifier was pressed.

direct - true if the event was caused by direct input device. See GestureEvent.isDirect()

inertia - if represents inertia of an already finished gesture.

zoomFactor - zoom amount

totalZoomFactor - cumulative zoom amount

pickResult - pick result. Can be null, in this case a 2D pick result without any further values is constructed based on the scene coordinates

Since:

JavaFX 8.0

Method Details

getZoomFactor

public double getZoomFactor()

Gets the zooming amount of this event. The factor value works well when multiplied with the node's scale properties (values greater than 1 for zooming in, values between 0 and 1 for zooming out).

Returns:

The zooming amount of this event

getTotalZoomFactor

public double getTotalZoomFactor()

Gets the zooming amount of this gesture. The factor value works well when multiplied with the node's scale properties (values greater than 1 for zooming in, values between 0 and 1 for zooming out).

Returns:

The cumulative zooming amount of this gesture

toString

public String toString()

Returns a string representation of this ZoomEvent object.

Overrides:

toString in class GestureEvent

Returns:

a string representation of this ZoomEvent object.

copyFor

public ZoomEvent copyFor(Object newSource,
 EventTarget newTarget)

Description copied from class: GestureEvent

Creates and returns a copy of this event with the specified event source and target. If the source or target is set to null, it is replaced by the NULL_SOURCE_TARGET value.

Overrides:

copyFor in class Event

Parameters:

newSource - the new source of the copied event

newTarget - the new target of the copied event

Returns:

the event copy with the new source and target

copyFor

public ZoomEvent copyFor(Object newSource,
 EventTarget newTarget,
 EventType<ZoomEvent> type)

Creates a copy of the given event with the given fields substituted.

Parameters:

newSource - the new source of the copied event

newTarget - the new target of the copied event

type - the new eventType

Returns:

the event copy with the fields substituted

Since:

JavaFX 8.0

getEventType

public EventType<ZoomEvent> getEventType()

Description copied from class: Event

Gets the event type of this event. Objects of the same Event class can have different event types. These event types further specify what kind of event occurred.

Overrides:

getEventType in class Event

Returns:

the event type