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:

java.io.Serializable, java.lang.Cloneable

public 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:

2.2

See Also:

Serialized Form

Field Summary

Fields

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

Fields inherited from class javafx.event.Event

consumed, eventType, NULL_SOURCE_TARGET, target

Fields inherited from class java.util.EventObject

source

Method Summary

Methods

Modifier and Type	Method and Description
double	getTotalZoomFactor() Gets the zooming amount of this gesture.
double	getZoomFactor() Gets the zooming amount of this event.
java.lang.String	toString() Returns a string representation of this ZoomEvent object.

Methods inherited from class javafx.scene.input.GestureEvent

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

Methods inherited from class javafx.event.Event

clone, consume, fireEvent, getEventType, getTarget, isConsumed

Methods inherited from class java.util.EventObject

getSource

Methods inherited from class java.lang.Object

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

Field Detail

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.

Method Detail

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 java.lang.String toString()

Returns a string representation of this ZoomEvent object.

Overrides:

toString in class GestureEvent

Returns:

a string representation of this ZoomEvent object.