Scroll event indicates that user performed scrolling by mouse wheel, track pad, touch screen or other similar device.

When the scrolling is produced by a touch gesture (such as dragging a finger over a touch screen), it is surrounded by the SCROLL_STARTED and SCROLL_FINISHED events. Changing number of involved touch points during the scrolling is considered a new gesture, so the pair of SCROLL_FINISHED and SCROLL_STARTED notifications is delivered each time the touchCount changes. When the scrolling is caused by a mouse wheel rotation, only a one-time SCROLL event is delivered, without the started/finished surroundings. If scrolling inertia is active on the given platform, some SCROLL events with isInertia() returning true can come after SCROLL_FINISHED.

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. For mouse wheel rotation the event is delivered to the top-most node picked on mouse cursor location. The delivery is independent of current focus owner.

The event provides two different types of scrolling values: pixel-based and character/line-based. The basic deltaX and deltaY values give reasonable results when used as number of pixels to scroll (The totalDeltaX and totalDeltaY contain the cumulative values for the whole gesture, zeros for mouse wheel). For scrolling text (or other line-based content as tables) the textDelta values should be used if they are available. The textDeltaXUnits and textDeltaYUnits determine how to interpret the textDeltaX and textDeltaY values. If the units are set to NONE, the text-based values are not available (not provided by the underlying platform) and the pixel-based values need to be used.

As all gestures, scrolling 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 or with mouse - the mouse cursor location is usually used as the gesture coordinates).

For example, scrolling a graphical node can be achieved by following code:


    node.setOnScroll(new EventHandler<ScrollEvent>() {
        @Override public void handle(ScrollEvent event) {
            node.setTranslateX(node.getTranslateX() + event.getDeltaX());
            node.setTranslateY(node.getTranslateY() + event.getDeltaY());
        }
    });

A scroll event handler on text-based component behaving according to system settings on all platforms should contain following logic:

switch(event.getTextDeltaYUnits()) {
        case LINES:
            // scroll about event.getTextDeltaY() lines
            break;
        case PAGES:
            // scroll about event.getTextDeltaY() pages
            break;
        case NONE:
            // scroll about event.getDeltaY() pixels
            break;
    }

Nested and Inner Type Summary

Modifier and Type	Class and Description
public static enum	ScrollEvent.HorizontalTextScrollUnits Horizontal text-based scrolling units.
public static enum	ScrollEvent.VerticalTextScrollUnits Vertical text-based scrolling units.

Field Summary

Modifier and Type	Field and Description
public static final EventType<ScrollEvent>	ANY Hides javafx.scene.input.GestureEvent.ANY. Common supertype for all scroll event types.
private final double	deltaX
private final double	deltaY
private final double	multiplierX
private final double	multiplierY
public static final EventType<ScrollEvent>	SCROLL This event occurs when user performs a scrolling action such as rotating mouse wheel or dragging a finger over touch screen.
public static final EventType<ScrollEvent>	SCROLL_FINISHED This event occurs when a scrolling gesture ends.
public static final EventType<ScrollEvent>	SCROLL_STARTED This event occurs when a scrolling gesture is detected.
private static final long	serialVersionUID Hides javafx.scene.input.GestureEvent.serialVersionUID.
private final double	textDeltaX
private final ScrollEvent.HorizontalTextScrollUnits	textDeltaXUnits
private final double	textDeltaY
private final ScrollEvent.VerticalTextScrollUnits	textDeltaYUnits
private double	totalDeltaX
private final double	totalDeltaY
private final int	touchCount

Constructor Summary

Access	Constructor and Description
private	ScrollEvent(Object source, EventTarget target, final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, double multiplierX, double multiplierY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult)
public	ScrollEvent(Object the source of the event. Can be null. source, EventTarget the target of the event. Can be null. target, final EventType<ScrollEvent> The type of the event. eventType, double The x with respect to the scene. x, double The y with respect to the scene. y, double The x coordinate relative to screen. screenX, double The y coordinate relative to screen. screenY, boolean true if shift modifier was pressed. shiftDown, boolean true if control modifier was pressed. controlDown, boolean true if alt modifier was pressed. altDown, boolean true if meta modifier was pressed. metaDown, boolean true if the event was caused by direct input device. See `isDirect()` direct, boolean if represents inertia of an already finished gesture. inertia, double horizontal scroll amount deltaX, double vertical scroll amount deltaY, double cumulative horizontal scroll amount totalDeltaX, double cumulative vertical scroll amount totalDeltaY, ScrollEvent.HorizontalTextScrollUnits units for horizontal text-based scroll amount textDeltaXUnits, double horizontal text-based scroll amount textDeltaX, ScrollEvent.VerticalTextScrollUnits units for vertical text-based scroll amount textDeltaYUnits, double vertical text-based scroll amount textDeltaY, int number of touch points touchCount, 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 pickResult) Constructs new ScrollEvent event.
public	ScrollEvent(final EventType<ScrollEvent> The type of the event. eventType, double The x with respect to the scene. x, double The y with respect to the scene. y, double The x coordinate relative to screen. screenX, double The y coordinate relative to screen. screenY, boolean true if shift modifier was pressed. shiftDown, boolean true if control modifier was pressed. controlDown, boolean true if alt modifier was pressed. altDown, boolean true if meta modifier was pressed. metaDown, boolean true if the event was caused by direct input device. See `isDirect()` direct, boolean if represents inertia of an already finished gesture. inertia, double horizontal scroll amount deltaX, double vertical scroll amount deltaY, double cumulative horizontal scroll amount totalDeltaX, double cumulative vertical scroll amount totalDeltaY, ScrollEvent.HorizontalTextScrollUnits units for horizontal text-based scroll amount textDeltaXUnits, double horizontal text-based scroll amount textDeltaX, ScrollEvent.VerticalTextScrollUnits units for vertical text-based scroll amount textDeltaYUnits, double vertical text-based scroll amount textDeltaY, int number of touch points touchCount, PickResult pick result. Can be null, in this case a 2D pick result without any further values is constructed based on the scene coordinates pickResult) Constructs new ScrollEvent event with null source and target
public	ScrollEvent(final EventType<ScrollEvent> The type of the event. eventType, double The x with respect to the scene. x, double The y with respect to the scene. y, double The x coordinate relative to screen. screenX, double The y coordinate relative to screen. screenY, boolean true if shift modifier was pressed. shiftDown, boolean true if control modifier was pressed. controlDown, boolean true if alt modifier was pressed. altDown, boolean true if meta modifier was pressed. metaDown, boolean true if the event was caused by direct input device. See `isDirect()` direct, boolean if represents inertia of an already finished gesture. inertia, double horizontal scroll amount deltaX, double vertical scroll amount deltaY, double cumulative horizontal scroll amount totalDeltaX, double cumulative vertical scroll amount totalDeltaY, double an X multiplier used to convert wheel rotations to pixels multiplierX, double an Y multiplier used to convert wheel rotations to pixels multiplierY, ScrollEvent.HorizontalTextScrollUnits units for horizontal text-based scroll amount textDeltaXUnits, double horizontal text-based scroll amount textDeltaX, ScrollEvent.VerticalTextScrollUnits units for vertical text-based scroll amount textDeltaYUnits, double vertical text-based scroll amount textDeltaY, int number of touch points touchCount, PickResult pick result. Can be null, in this case a 2D pick result without any further values is constructed based on the scene coordinates pickResult) Constructs new ScrollEvent event with null source and target

Method Summary

Modifier and Type	Method and Description
public ScrollEvent	copyFor(Object newSource, EventTarget newTarget) Overrides javafx.scene.input.GestureEvent.copyFor. Creates and returns a copy of this event with the specified event source and target.
public ScrollEvent	Returns: the event copy with the fields substituted copyFor(Object the new source of the copied event newSource, EventTarget the new target of the copied event newTarget, EventType<ScrollEvent> the new eventType type) Creates a copy of the given event with the given fields substituted.
public double	Returns: Number of pixels to scroll horizontally getDeltaX() Gets the horizontal scroll amount.
public double	Returns: Number of pixels to scroll vertically getDeltaY() Gets the vertical scroll amount.
public EventType<ScrollEvent>	getEventType() Overrides javafx.scene.input.GestureEvent.getEventType. Gets the event type of this event.
public double	Returns: the x multiplier getMultiplierX() Gets the multiplier used to convert mouse wheel rotation units to pixels
public double	Returns: the y multiplier getMultiplierY() Gets the multiplier used to convert mouse wheel rotation units to pixels
public double	Returns: Number of units to scroll horizontally, zero if the text-based horizontal scrolling data is not available `getTextDeltaXUnits()` returns `NONE` getTextDeltaX() Gets the horizontal text-based scroll amount.
public ScrollEvent.HorizontalTextScrollUnits	Returns: the horizontal scrolling units for text-based scrolling getTextDeltaXUnits() Gets the horizontal scrolling units for text-based scrolling.
public double	Returns: Number of units to scroll vertically, zero if the text-based vertical scrolling data is not available `getTextDeltaYUnits()` returns `NONE` getTextDeltaY() Gets the vertical text-based scroll amount.
public ScrollEvent.VerticalTextScrollUnits	Returns: the vertical scrolling units for text-based scrolling getTextDeltaYUnits() Gets the vertical scrolling units for text-based scrolling.
public double	Returns: Number of pixels scrolled horizontally during the gesture getTotalDeltaX() Gets the cumulative horizontal scroll amount for the whole gesture.
public double	Returns: Number of pixels to scrolled vertically during the gesture getTotalDeltaY() Gets the cumulative vertical scroll amount for the whole gesture.
public int	Returns: Number of touch points that caused this event getTouchCount() Gets number of touch points that caused this event.
public String	Returns: a string representation of this `ScrollEvent` object. toString() Overrides javafx.scene.input.GestureEvent.toString. Returns a string representation of this `ScrollEvent` object.

Inherited from javafx.scene.input.GestureEvent:: getPickResult getSceneX getSceneY getScreenX getScreenY getX getY getZ isAltDown isControlDown isDirect isInertia isMetaDown isShiftDown isShortcutDown

Field Detail

ANY	back to summary
public static final EventType<ScrollEvent> ANY Hides javafx.scene.input.GestureEvent.ANY. Common supertype for all scroll event types.

ANY

back to summary

public static final EventType<ScrollEvent> ANY

Hides javafx.scene.input.GestureEvent.ANY.

Common supertype for all scroll event types.

deltaX	back to summary
private final double deltaX Annotations @SuppressWarnings:doclint:missing

deltaY	back to summary
private final double deltaY Annotations @SuppressWarnings:doclint:missing

multiplierX	back to summary
private final double multiplierX Annotations @SuppressWarnings:doclint:missing

multiplierY	back to summary
private final double multiplierY Annotations @SuppressWarnings:doclint:missing

SCROLL	back to summary
public static final EventType<ScrollEvent> SCROLL This event occurs when user performs a scrolling action such as rotating mouse wheel or dragging a finger over touch screen.

SCROLL_FINISHED	back to summary
public static final EventType<ScrollEvent> SCROLL_FINISHED This event occurs when a scrolling gesture ends. It doesn't occur for mouse wheel scrolling. Since JavaFX 2.2

SCROLL_FINISHED

back to summary

public static final EventType<ScrollEvent> SCROLL_FINISHED

This event occurs when a scrolling gesture ends. It doesn't occur for mouse wheel scrolling.

Since: JavaFX 2.2

SCROLL_STARTED	back to summary
public static final EventType<ScrollEvent> SCROLL_STARTED This event occurs when a scrolling gesture is detected. It doesn't occur for mouse wheel scrolling. Since JavaFX 2.2

SCROLL_STARTED

back to summary

public static final EventType<ScrollEvent> SCROLL_STARTED

This event occurs when a scrolling gesture is detected. It doesn't occur for mouse wheel scrolling.

Since: JavaFX 2.2

serialVersionUID	back to summary
private static final long serialVersionUID Hides javafx.scene.input.GestureEvent.serialVersionUID.

textDeltaX	back to summary
private final double textDeltaX Annotations @SuppressWarnings:doclint:missing

textDeltaXUnits	back to summary
private final ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits Annotations @SuppressWarnings:doclint:missing

textDeltaY	back to summary
private final double textDeltaY Annotations @SuppressWarnings:doclint:missing

textDeltaYUnits	back to summary
private final ScrollEvent.VerticalTextScrollUnits textDeltaYUnits Annotations @SuppressWarnings:doclint:missing

totalDeltaX	back to summary
private double totalDeltaX Annotations @SuppressWarnings:doclint:missing

totalDeltaY	back to summary
private final double totalDeltaY Annotations @SuppressWarnings:doclint:missing

touchCount	back to summary
private final int touchCount Annotations @SuppressWarnings:doclint:missing

Constructor Detail

ScrollEvent	back to summary
private ScrollEvent(Object source, EventTarget target, final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, double multiplierX, double multiplierY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult)

ScrollEvent

back to summary

private ScrollEvent(Object source, EventTarget target, final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, double multiplierX, double multiplierY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult)

ScrollEvent back to summary

ScrollEvent	back to summary
public ScrollEvent(Object source, EventTarget target, final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult) Constructs new ScrollEvent event. Parameters source:Object the source of the event. Can be null. target:EventTarget the target of the event. Can be null. eventType:EventType<ScrollEvent> The type of the event. x:double The x with respect to the scene. y:double The y with respect to the scene. screenX:double The x coordinate relative to screen. screenY:double The y coordinate relative to screen. shiftDown:boolean true if shift modifier was pressed. controlDown:boolean true if control modifier was pressed. altDown:boolean true if alt modifier was pressed. metaDown:boolean true if meta modifier was pressed. direct:boolean true if the event was caused by direct input device. See `isDirect()` inertia:boolean if represents inertia of an already finished gesture. deltaX:double horizontal scroll amount deltaY:double vertical scroll amount totalDeltaX:double cumulative horizontal scroll amount totalDeltaY:double cumulative vertical scroll amount textDeltaXUnits:ScrollEvent.HorizontalTextScrollUnits units for horizontal text-based scroll amount textDeltaX:double horizontal text-based scroll amount textDeltaYUnits:ScrollEvent.VerticalTextScrollUnits units for vertical text-based scroll amount textDeltaY:double vertical text-based scroll amount touchCount:int number of touch points pickResult: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

public ScrollEvent(Object source, EventTarget target, final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult)

Constructs new ScrollEvent event.

Parameters

source:Object: the source of the event. Can be null.
target:EventTarget: the target of the event. Can be null.
eventType:EventType<ScrollEvent>: The type of the event.
x:double: The x with respect to the scene.
y:double: The y with respect to the scene.
screenX:double: The x coordinate relative to screen.
screenY:double: The y coordinate relative to screen.
shiftDown:boolean: true if shift modifier was pressed.
controlDown:boolean: true if control modifier was pressed.
altDown:boolean: true if alt modifier was pressed.
metaDown:boolean: true if meta modifier was pressed.
direct:boolean: true if the event was caused by direct input device. See isDirect()
inertia:boolean: if represents inertia of an already finished gesture.
deltaX:double: horizontal scroll amount
deltaY:double: vertical scroll amount
totalDeltaX:double: cumulative horizontal scroll amount
totalDeltaY:double: cumulative vertical scroll amount
textDeltaXUnits:ScrollEvent.HorizontalTextScrollUnits: units for horizontal text-based scroll amount
textDeltaX:double: horizontal text-based scroll amount
textDeltaYUnits:ScrollEvent.VerticalTextScrollUnits: units for vertical text-based scroll amount
textDeltaY:double: vertical text-based scroll amount
touchCount:int: number of touch points
pickResult: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

ScrollEvent back to summary

ScrollEvent	back to summary
public ScrollEvent(final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult) Constructs new ScrollEvent event with null source and target Parameters eventType:EventType<ScrollEvent> The type of the event. x:double The x with respect to the scene. y:double The y with respect to the scene. screenX:double The x coordinate relative to screen. screenY:double The y coordinate relative to screen. shiftDown:boolean true if shift modifier was pressed. controlDown:boolean true if control modifier was pressed. altDown:boolean true if alt modifier was pressed. metaDown:boolean true if meta modifier was pressed. direct:boolean true if the event was caused by direct input device. See `isDirect()` inertia:boolean if represents inertia of an already finished gesture. deltaX:double horizontal scroll amount deltaY:double vertical scroll amount totalDeltaX:double cumulative horizontal scroll amount totalDeltaY:double cumulative vertical scroll amount textDeltaXUnits:ScrollEvent.HorizontalTextScrollUnits units for horizontal text-based scroll amount textDeltaX:double horizontal text-based scroll amount textDeltaYUnits:ScrollEvent.VerticalTextScrollUnits units for vertical text-based scroll amount textDeltaY:double vertical text-based scroll amount touchCount:int number of touch points pickResult: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

public ScrollEvent(final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult)

Constructs new ScrollEvent event with null source and target

Parameters

eventType:EventType<ScrollEvent>: The type of the event.
x:double: The x with respect to the scene.
y:double: The y with respect to the scene.
screenX:double: The x coordinate relative to screen.
screenY:double: The y coordinate relative to screen.
shiftDown:boolean: true if shift modifier was pressed.
controlDown:boolean: true if control modifier was pressed.
altDown:boolean: true if alt modifier was pressed.
metaDown:boolean: true if meta modifier was pressed.
direct:boolean: true if the event was caused by direct input device. See isDirect()
inertia:boolean: if represents inertia of an already finished gesture.
deltaX:double: horizontal scroll amount
deltaY:double: vertical scroll amount
totalDeltaX:double: cumulative horizontal scroll amount
totalDeltaY:double: cumulative vertical scroll amount
textDeltaXUnits:ScrollEvent.HorizontalTextScrollUnits: units for horizontal text-based scroll amount
textDeltaX:double: horizontal text-based scroll amount
textDeltaYUnits:ScrollEvent.VerticalTextScrollUnits: units for vertical text-based scroll amount
textDeltaY:double: vertical text-based scroll amount
touchCount:int: number of touch points
pickResult: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

ScrollEvent back to summary

ScrollEvent	back to summary
public ScrollEvent(final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, double multiplierX, double multiplierY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult) Constructs new ScrollEvent event with null source and target Parameters eventType:EventType<ScrollEvent> The type of the event. x:double The x with respect to the scene. y:double The y with respect to the scene. screenX:double The x coordinate relative to screen. screenY:double The y coordinate relative to screen. shiftDown:boolean true if shift modifier was pressed. controlDown:boolean true if control modifier was pressed. altDown:boolean true if alt modifier was pressed. metaDown:boolean true if meta modifier was pressed. direct:boolean true if the event was caused by direct input device. See `isDirect()` inertia:boolean if represents inertia of an already finished gesture. deltaX:double horizontal scroll amount deltaY:double vertical scroll amount totalDeltaX:double cumulative horizontal scroll amount totalDeltaY:double cumulative vertical scroll amount multiplierX:double an X multiplier used to convert wheel rotations to pixels multiplierY:double an Y multiplier used to convert wheel rotations to pixels textDeltaXUnits:ScrollEvent.HorizontalTextScrollUnits units for horizontal text-based scroll amount textDeltaX:double horizontal text-based scroll amount textDeltaYUnits:ScrollEvent.VerticalTextScrollUnits units for vertical text-based scroll amount textDeltaY:double vertical text-based scroll amount touchCount:int number of touch points pickResult: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

public ScrollEvent(final EventType<ScrollEvent> eventType, double x, double y, double screenX, double screenY, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean direct, boolean inertia, double deltaX, double deltaY, double totalDeltaX, double totalDeltaY, double multiplierX, double multiplierY, ScrollEvent.HorizontalTextScrollUnits textDeltaXUnits, double textDeltaX, ScrollEvent.VerticalTextScrollUnits textDeltaYUnits, double textDeltaY, int touchCount, PickResult pickResult)

Constructs new ScrollEvent event with null source and target

Parameters

eventType:EventType<ScrollEvent>: The type of the event.
x:double: The x with respect to the scene.
y:double: The y with respect to the scene.
screenX:double: The x coordinate relative to screen.
screenY:double: The y coordinate relative to screen.
shiftDown:boolean: true if shift modifier was pressed.
controlDown:boolean: true if control modifier was pressed.
altDown:boolean: true if alt modifier was pressed.
metaDown:boolean: true if meta modifier was pressed.
direct:boolean: true if the event was caused by direct input device. See isDirect()
inertia:boolean: if represents inertia of an already finished gesture.
deltaX:double: horizontal scroll amount
deltaY:double: vertical scroll amount
totalDeltaX:double: cumulative horizontal scroll amount
totalDeltaY:double: cumulative vertical scroll amount
multiplierX:double: an X multiplier used to convert wheel rotations to pixels
multiplierY:double: an Y multiplier used to convert wheel rotations to pixels
textDeltaXUnits:ScrollEvent.HorizontalTextScrollUnits: units for horizontal text-based scroll amount
textDeltaX:double: horizontal text-based scroll amount
textDeltaYUnits:ScrollEvent.VerticalTextScrollUnits: units for vertical text-based scroll amount
textDeltaY:double: vertical text-based scroll amount
touchCount:int: number of touch points
pickResult: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 Detail

copyFor back to summary

copyFor	back to summary
public ScrollEvent copyFor(Object newSource, EventTarget newTarget) Overrides javafx.scene.input.GestureEvent.copyFor. Doc from javafx.scene.input.GestureEvent.copyFor. 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. Annotations @Override

public ScrollEvent copyFor(Object newSource, EventTarget newTarget)

Overrides javafx.scene.input.GestureEvent.copyFor.

Doc from javafx.scene.input.GestureEvent.copyFor.

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.

Annotations

@Override

copyFor	back to summary
public ScrollEvent copyFor(Object newSource, EventTarget newTarget, EventType<ScrollEvent> type) Creates a copy of the given event with the given fields substituted. Parameters newSource:Object the new source of the copied event newTarget:EventTarget the new target of the copied event type:EventType<ScrollEvent> the new eventType Returns:ScrollEvent the event copy with the fields substituted Since JavaFX 8.0

copyFor

back to summary

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

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

Parameters

newSource:Object: the new source of the copied event
newTarget:EventTarget: the new target of the copied event
type:EventType<ScrollEvent>: the new eventType

Returns:ScrollEvent

the event copy with the fields substituted

Since

JavaFX 8.0

getDeltaX back to summary

getDeltaX	back to summary
public double getDeltaX() Gets the horizontal scroll amount. This value should be interpreted as a number of pixels to scroll. When scrolling a text-based content, the `textDeltaX` and `textDeltaXUnits` values should be considered first. The sign of the value is reversed compared to the coordinate system (when you scroll right, the content actually needs to go left). So the returned value can be simply added to the content's `X` coordinate. Returns:double Number of pixels to scroll horizontally

public double getDeltaX()

Gets the horizontal scroll amount. This value should be interpreted as a number of pixels to scroll. When scrolling a text-based content, the textDeltaX and textDeltaXUnits values should be considered first.

The sign of the value is reversed compared to the coordinate system (when you scroll right, the content actually needs to go left). So the returned value can be simply added to the content's X coordinate.

Returns:double: Number of pixels to scroll horizontally

getDeltaY back to summary

getDeltaY	back to summary
public double getDeltaY() Gets the vertical scroll amount. This value should be interpreted as a number of pixels to scroll. When scrolling a line-based content, the `textDeltaY` and `textDeltaYUnits` values should be considered first. The sign of the value is reversed compared to the coordinate system (when you scroll down, the content actually needs to go up). So the returned value can be simply added to the content's `Y` coordinate. Returns:double Number of pixels to scroll vertically

public double getDeltaY()

Gets the vertical scroll amount. This value should be interpreted as a number of pixels to scroll. When scrolling a line-based content, the textDeltaY and textDeltaYUnits values should be considered first.

The sign of the value is reversed compared to the coordinate system (when you scroll down, the content actually needs to go up). So the returned value can be simply added to the content's Y coordinate.

Returns:double: Number of pixels to scroll vertically

getEventType back to summary

getEventType	back to summary
public EventType<ScrollEvent> getEventType() Overrides javafx.scene.input.GestureEvent.getEventType. Doc from javafx.event.Event.getEventType. 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. Annotations @Override

public EventType<ScrollEvent> getEventType()

Overrides javafx.scene.input.GestureEvent.getEventType.

Doc from javafx.event.Event.getEventType.

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.

Annotations

@Override

getMultiplierX	back to summary
public double getMultiplierX() Gets the multiplier used to convert mouse wheel rotation units to pixels Returns:double the x multiplier Since JavaFX 8.0

getMultiplierX

back to summary

public double getMultiplierX()

Gets the multiplier used to convert mouse wheel rotation units to pixels

Returns:double: the x multiplier
Since: JavaFX 8.0

getMultiplierY	back to summary
public double getMultiplierY() Gets the multiplier used to convert mouse wheel rotation units to pixels Returns:double the y multiplier Since JavaFX 8.0

getMultiplierY

back to summary

public double getMultiplierY()

Gets the multiplier used to convert mouse wheel rotation units to pixels

Returns:double: the y multiplier
Since: JavaFX 8.0

getTextDeltaX back to summary

getTextDeltaX	back to summary
public double getTextDeltaX() Gets the horizontal text-based scroll amount. This value should be interpreted according to the `getTextDeltaXUnits()` value. Returns:double Number of units to scroll horizontally, zero if the text-based horizontal scrolling data is not available `getTextDeltaXUnits()` returns `NONE`

public double getTextDeltaX()

Gets the horizontal text-based scroll amount. This value should be interpreted according to the getTextDeltaXUnits() value.

Returns:double: Number of units to scroll horizontally, zero if the text-based horizontal scrolling data is not available getTextDeltaXUnits() returns NONE

getTextDeltaXUnits back to summary

getTextDeltaXUnits	back to summary
public ScrollEvent.HorizontalTextScrollUnits getTextDeltaXUnits() Gets the horizontal scrolling units for text-based scrolling. The returned value indicates how to interpret the `getTextDeltaX()` value. If the returned value is `NONE`, the text-based scrolling value is not available and the pixel-based `getDeltaX()` value needs to be used. Returns:ScrollEvent.HorizontalTextScrollUnits the horizontal scrolling units for text-based scrolling

public ScrollEvent.HorizontalTextScrollUnits getTextDeltaXUnits()

Gets the horizontal scrolling units for text-based scrolling. The returned value indicates how to interpret the getTextDeltaX() value. If the returned value is NONE, the text-based scrolling value is not available and the pixel-based getDeltaX() value needs to be used.

Returns:ScrollEvent.HorizontalTextScrollUnits: the horizontal scrolling units for text-based scrolling

getTextDeltaY back to summary

getTextDeltaY	back to summary
public double getTextDeltaY() Gets the vertical text-based scroll amount. This value should be interpreted according to the `getTextDeltaYUnits()` value. Returns:double Number of units to scroll vertically, zero if the text-based vertical scrolling data is not available `getTextDeltaYUnits()` returns `NONE`

public double getTextDeltaY()

Gets the vertical text-based scroll amount. This value should be interpreted according to the getTextDeltaYUnits() value.

Returns:double: Number of units to scroll vertically, zero if the text-based vertical scrolling data is not available getTextDeltaYUnits() returns NONE

getTextDeltaYUnits back to summary

getTextDeltaYUnits	back to summary
public ScrollEvent.VerticalTextScrollUnits getTextDeltaYUnits() Gets the vertical scrolling units for text-based scrolling. The returned value indicates how to interpret the `getTextDeltaY()` value. If the returned value is `NONE`, the text-based scrolling value is not available and the pixel-based `getDeltaY()` value needs to be used. Returns:ScrollEvent.VerticalTextScrollUnits the vertical scrolling units for text-based scrolling

public ScrollEvent.VerticalTextScrollUnits getTextDeltaYUnits()

Gets the vertical scrolling units for text-based scrolling. The returned value indicates how to interpret the getTextDeltaY() value. If the returned value is NONE, the text-based scrolling value is not available and the pixel-based getDeltaY() value needs to be used.

Returns:ScrollEvent.VerticalTextScrollUnits: the vertical scrolling units for text-based scrolling

getTotalDeltaX back to summary

getTotalDeltaX	back to summary
public double getTotalDeltaX() Gets the cumulative horizontal scroll amount for the whole gesture. This value should be interpreted as a number of pixels to scroll relatively to the state at the beginning of the gesture. Contains zeros for mouse wheel scrolling. The sign of the value is reversed compared to the coordinate system (when you scroll right, the content actually needs to go left). So the returned value can be simply added to the content's `X` coordinate. Returns:double Number of pixels scrolled horizontally during the gesture Since JavaFX 2.2

public double getTotalDeltaX()

Gets the cumulative horizontal scroll amount for the whole gesture. This value should be interpreted as a number of pixels to scroll relatively to the state at the beginning of the gesture. Contains zeros for mouse wheel scrolling.

Returns:double: Number of pixels scrolled horizontally during the gesture
Since: JavaFX 2.2

getTotalDeltaY back to summary

getTotalDeltaY	back to summary
public double getTotalDeltaY() Gets the cumulative vertical scroll amount for the whole gesture. This value should be interpreted as a number of pixels to scroll relatively to the state at the beginning of the gesture. Contains zeros for mouse wheel scrolling. The sign of the value is reversed compared to the coordinate system (when you scroll down, the content actually needs to go up). So the returned value can be simply added to the content's `Y` coordinate. Returns:double Number of pixels to scrolled vertically during the gesture Since JavaFX 2.2

public double getTotalDeltaY()

Gets the cumulative vertical scroll amount for the whole gesture. This value should be interpreted as a number of pixels to scroll relatively to the state at the beginning of the gesture. Contains zeros for mouse wheel scrolling.

Returns:double: Number of pixels to scrolled vertically during the gesture
Since: JavaFX 2.2

getTouchCount	back to summary
public int getTouchCount() Gets number of touch points that caused this event. For non-touch source devices as mouse wheel and for inertia events after gesture finish it returns zero. Returns:int Number of touch points that caused this event Since JavaFX 2.2

getTouchCount

back to summary

public int getTouchCount()

Gets number of touch points that caused this event. For non-touch source devices as mouse wheel and for inertia events after gesture finish it returns zero.

Returns:int: Number of touch points that caused this event
Since: JavaFX 2.2

toString back to summary

toString	back to summary
public String toString() Overrides javafx.scene.input.GestureEvent.toString. Returns a string representation of this `ScrollEvent` object. Returns:String a string representation of this `ScrollEvent` object. Annotations @Override

public String toString()

Overrides javafx.scene.input.GestureEvent.toString.

Returns a string representation of this ScrollEvent object.

Returns:String

a string representation of this ScrollEvent object.

Annotations

@Override

javafx.scene.input back to summary

public final Enum ScrollEvent.HorizontalTextScrollUnits

Class Inheritance

extends Enum<ScrollEvent.HorizontalTextScrollUnits>

java.lang.Object
java.lang.Enum
javafx.scene.input.ScrollEvent.HorizontalTextScrollUnits

Horizontal text-based scrolling units.

Since: JavaFX 2.0

Field Summary

Modifier and Type	Field and Description
public static final ScrollEvent.HorizontalTextScrollUnits	CHARACTERS The horizontal text-based scrolling amount is a number of characters to scroll.
public static final ScrollEvent.HorizontalTextScrollUnits	NONE The horizontal text-based scrolling data is not available (not provided by the underlying platform).

Constructor Summary

Access	Constructor and Description
private	HorizontalTextScrollUnits()

Method Summary

Modifier and Type	Method and Description
public static ScrollEvent.HorizontalTextScrollUnits	valueOf(String name)
public static ScrollEvent.HorizontalTextScrollUnits[]	values()

Inherited from java.lang.Enum:: clone compareTo describeConstable equals finalize getDeclaringClass hashCode name ordinal toString valueOf

Field Detail

CHARACTERS	back to summary
public static final ScrollEvent.HorizontalTextScrollUnits CHARACTERS The horizontal text-based scrolling amount is a number of characters to scroll.

NONE	back to summary
public static final ScrollEvent.HorizontalTextScrollUnits NONE The horizontal text-based scrolling data is not available (not provided by the underlying platform).

Constructor Detail

HorizontalTextScrollUnits	back to summary
private HorizontalTextScrollUnits()

Method Detail

valueOf	back to summary
public static ScrollEvent.HorizontalTextScrollUnits valueOf(String name)

values	back to summary
public static ScrollEvent.HorizontalTextScrollUnits[] values()

javafx.scene.input back to summary

public final Enum ScrollEvent.VerticalTextScrollUnits

Class Inheritance

extends Enum<ScrollEvent.VerticalTextScrollUnits>

java.lang.Object
java.lang.Enum
javafx.scene.input.ScrollEvent.VerticalTextScrollUnits

Vertical text-based scrolling units.

Since: JavaFX 2.0

Field Summary

Modifier and Type	Field and Description
public static final ScrollEvent.VerticalTextScrollUnits	LINES The vertical text-based scrolling amount is a number of lines to scroll.
public static final ScrollEvent.VerticalTextScrollUnits	NONE The vertical text-based scrolling data is not available (not provided by the underlying platform).
public static final ScrollEvent.VerticalTextScrollUnits	PAGES The vertical text-based scrolling amount is a number of pages to scroll.

Constructor Summary

Access	Constructor and Description
private	VerticalTextScrollUnits()

Method Summary

Modifier and Type	Method and Description
public static ScrollEvent.VerticalTextScrollUnits	valueOf(String name)
public static ScrollEvent.VerticalTextScrollUnits[]	values()

Inherited from java.lang.Enum:: clone compareTo describeConstable equals finalize getDeclaringClass hashCode name ordinal toString valueOf

Field Detail

LINES	back to summary
public static final ScrollEvent.VerticalTextScrollUnits LINES The vertical text-based scrolling amount is a number of lines to scroll.

NONE	back to summary
public static final ScrollEvent.VerticalTextScrollUnits NONE The vertical text-based scrolling data is not available (not provided by the underlying platform).

PAGES	back to summary
public static final ScrollEvent.VerticalTextScrollUnits PAGES The vertical text-based scrolling amount is a number of pages to scroll.

Constructor Detail

VerticalTextScrollUnits	back to summary
private VerticalTextScrollUnits()

Method Detail

valueOf	back to summary
public static ScrollEvent.VerticalTextScrollUnits valueOf(String name)

values	back to summary
public static ScrollEvent.VerticalTextScrollUnits[] values()

public final Class ScrollEvent

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

public final Enum ScrollEvent.HorizontalTextScrollUnits

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

public final Enum ScrollEvent.VerticalTextScrollUnits

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail