Module javafx.graphics

Package javafx.scene.input

Class MouseDragEvent

java.lang.Object

java.util.EventObject

javafx.event.Event

javafx.scene.input.InputEvent

javafx.scene.input.MouseEvent

javafx.scene.input.MouseDragEvent

All Implemented Interfaces:

Serializable, Cloneable

public final class MouseDragEvent
extends MouseEvent

Mouse drag events are delivered to potential gesture targets during full press-drag-release gestures. The difference among different gesture types is described at MouseEvent.

Full press-drag-release gesture can be started by calling startFullDrag() (on a node or scene) inside of a DRAG_DETECTED event handler. This call activates delivering of MouseDragEvents to the nodes that are under cursor during the dragging gesture.

When you drag a node, it's still under cursor, so it is considered being a potential gesture target during the whole gesture. If you need to drag a node to a different node and let the other node know about it, you need to ensure that the nodes under the dragged node are picked as the potential gesture targets. You can achieve this by calling setMouseTransparent(true) on the dragged node in a MOUSE_PRESSED handler and returning it back to false in a MOUSE_RELEASED handler. This way the nodes under the dragged node will receive the MouseDragEvents, while all the MouseEvents will still be delivered to the (currently mouse transparent) gesture source.

The entered/exited events behave similarly to mouse entered/exited events, please see MouseEvent overview.

Since:

JavaFX 2.1

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final EventType<MouseDragEvent>	ANY	Common supertype for all mouse event types.
static final EventType<MouseDragEvent>	MOUSE_DRAG_ENTERED	This event occurs when the gesture enters a node.
static final EventType<MouseDragEvent>	MOUSE_DRAG_ENTERED_TARGET	This event occurs when the gesture enters a node.
static final EventType<MouseDragEvent>	MOUSE_DRAG_EXITED	This event occurs when the gesture exits a node.
static final EventType<MouseDragEvent>	MOUSE_DRAG_EXITED_TARGET	This event occurs when the gesture exits a node.
static final EventType<MouseDragEvent>	MOUSE_DRAG_OVER	This event occurs when the gesture progresses within this node.
static final EventType<MouseDragEvent>	MOUSE_DRAG_RELEASED	This event occurs when the gesture ends (by releasing mouse button) on this node.

Fields declared in class javafx.scene.input.MouseEvent

DRAG_DETECTED, MOUSE_CLICKED, MOUSE_DRAGGED, MOUSE_ENTERED, MOUSE_ENTERED_TARGET, MOUSE_EXITED, MOUSE_EXITED_TARGET, MOUSE_MOVED, MOUSE_PRESSED, MOUSE_RELEASED

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
MouseDragEvent(Object source, EventTarget target, EventType<MouseDragEvent> eventType, double x, double y, double screenX, double screenY, MouseButton button, int clickCount, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean primaryButtonDown, boolean middleButtonDown, boolean secondaryButtonDown, boolean backButtonDown, boolean forwardButtonDown, boolean synthesized, boolean popupTrigger, PickResult pickResult, Object gestureSource)	Constructs new MouseDragEvent event.
MouseDragEvent(Object source, EventTarget target, EventType<MouseDragEvent> eventType, double x, double y, double screenX, double screenY, MouseButton button, int clickCount, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean primaryButtonDown, boolean middleButtonDown, boolean secondaryButtonDown, boolean synthesized, boolean popupTrigger, PickResult pickResult, Object gestureSource)	Constructs new MouseDragEvent event.
MouseDragEvent(EventType<MouseDragEvent> eventType, double x, double y, double screenX, double screenY, MouseButton button, int clickCount, boolean shiftDown, boolean controlDown, boolean altDown, boolean metaDown, boolean primaryButtonDown, boolean middleButtonDown, boolean secondaryButtonDown, boolean synthesized, boolean popupTrigger, PickResult pickResult, Object gestureSource)	Constructs new MouseDragEvent event with null source and target.

Method Summary

Modifier and Type	Method	Description
MouseDragEvent	copyFor(Object newSource, EventTarget newTarget)	Copies this event for a different source and target.
MouseDragEvent	copyFor(Object newSource, EventTarget newTarget, EventType<? extends MouseEvent> type)	Creates a copy of the given event with the given fields substituted.
EventType<MouseDragEvent>	getEventType()	Gets the event type of this event.
Object	getGestureSource()	Returns the source object of the ongoing gesture.
String	toString()	Returns a string representation of this MouseDragEvent object.

Methods declared in class javafx.scene.input.MouseEvent

copyForMouseDragEvent, getButton, getClickCount, getPickResult, getSceneX, getSceneY, getScreenX, getScreenY, getX, getY, getZ, isAltDown, isBackButtonDown, isControlDown, isDragDetect, isForwardButtonDown, isMetaDown, isMiddleButtonDown, isPopupTrigger, isPrimaryButtonDown, isSecondaryButtonDown, isShiftDown, isShortcutDown, isStillSincePress, isSynthesized, setDragDetect

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<MouseDragEvent> ANY

Common supertype for all mouse event types.

MOUSE_DRAG_OVER

public static final EventType<MouseDragEvent> MOUSE_DRAG_OVER

This event occurs when the gesture progresses within this node.

MOUSE_DRAG_RELEASED

public static final EventType<MouseDragEvent> MOUSE_DRAG_RELEASED

This event occurs when the gesture ends (by releasing mouse button) on this node.

MOUSE_DRAG_ENTERED_TARGET

public static final EventType<MouseDragEvent> MOUSE_DRAG_ENTERED_TARGET

This event occurs when the gesture enters a node. It's the bubbling variant, which is delivered also to all parents of the entered node (unless it was consumed). When notifications about mouse entering some of node's children are not desired, MOUSE_DRAG_ENTERED event handler should be used.

See Also:

• MouseEvent for more information about mouse entered/exited handling which is similar

MOUSE_DRAG_ENTERED

public static final EventType<MouseDragEvent> MOUSE_DRAG_ENTERED

This event occurs when the gesture enters a node. This event type is delivered only to the entered node, if parents want to filter it or get the bubbling event, they need to use MOUSE_DRAG_ENTERED_TARGET.

See Also:

• MouseEvent for more information about mouse entered/exited handling which is similar

MOUSE_DRAG_EXITED_TARGET

public static final EventType<MouseDragEvent> MOUSE_DRAG_EXITED_TARGET

This event occurs when the gesture exits a node. It's the bubbling variant, which is delivered also to all parents of the exited node (unless it was consumed). When notifications about mouse exiting some of node's children are not desired, MOUSE_DRAG_EXITED event handler should be used.

See Also:

• MouseEvent for more information about mouse entered/exited handling which is similar

MOUSE_DRAG_EXITED

public static final EventType<MouseDragEvent> MOUSE_DRAG_EXITED

This event occurs when the gesture exits a node. This event type is delivered only to the exited node, if parents want to filter it or get the bubbling event, they need to use MOUSE_DRAG_EXITED_TARGET.

See Also:

• MouseEvent for more information about mouse entered/exited handling which is similar

Constructor Details

MouseDragEvent

public MouseDragEvent(Object source,
 EventTarget target,
 EventType<MouseDragEvent> eventType,
 double x,
 double y,
 double screenX,
 double screenY,
 MouseButton button,
 int clickCount,
 boolean shiftDown,
 boolean controlDown,
 boolean altDown,
 boolean metaDown,
 boolean primaryButtonDown,
 boolean middleButtonDown,
 boolean secondaryButtonDown,
 boolean synthesized,
 boolean popupTrigger,
 PickResult pickResult,
 Object gestureSource)

Constructs new MouseDragEvent event. Both MouseEvent.isBackButtonDown() and MouseEvent.isForwardButtonDown() will return false for this event

Parameters:

source - the source of the event, which can be null

target - the target of the event, which 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

button - the mouse button used

clickCount - number of click counts

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

primaryButtonDown - true if primary button was pressed

middleButtonDown - true if middle button was pressed

secondaryButtonDown - true if secondary button was pressed

synthesized - if this event was synthesized

popupTrigger - whether this event denotes a popup trigger for current platform

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 target

gestureSource - source object of the ongoing gesture

Since:

JavaFX 8.0

MouseDragEvent

public MouseDragEvent(Object source,
 EventTarget target,
 EventType<MouseDragEvent> eventType,
 double x,
 double y,
 double screenX,
 double screenY,
 MouseButton button,
 int clickCount,
 boolean shiftDown,
 boolean controlDown,
 boolean altDown,
 boolean metaDown,
 boolean primaryButtonDown,
 boolean middleButtonDown,
 boolean secondaryButtonDown,
 boolean backButtonDown,
 boolean forwardButtonDown,
 boolean synthesized,
 boolean popupTrigger,
 PickResult pickResult,
 Object gestureSource)

Constructs new MouseDragEvent event.

Parameters:

source - the source of the event, which can be null

target - the target of the event, which 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

button - the mouse button used

clickCount - number of click counts

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

primaryButtonDown - true if primary button was pressed

middleButtonDown - true if middle button was pressed

secondaryButtonDown - true if secondary button was pressed

backButtonDown - true if back button was pressed

forwardButtonDown - true if forward button was pressed

synthesized - if this event was synthesized

popupTrigger - whether this event denotes a popup trigger for current platform

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 target

gestureSource - source object of the ongoing gesture

Since:

12

MouseDragEvent

public MouseDragEvent(EventType<MouseDragEvent> eventType,
 double x,
 double y,
 double screenX,
 double screenY,
 MouseButton button,
 int clickCount,
 boolean shiftDown,
 boolean controlDown,
 boolean altDown,
 boolean metaDown,
 boolean primaryButtonDown,
 boolean middleButtonDown,
 boolean secondaryButtonDown,
 boolean synthesized,
 boolean popupTrigger,
 PickResult pickResult,
 Object gestureSource)

Constructs new MouseDragEvent event with null source and target. Both MouseEvent.isBackButtonDown() and MouseEvent.isForwardButtonDown() will return false for this event.

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

button - the mouse button used

clickCount - number of click counts

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

primaryButtonDown - true if primary button was pressed

middleButtonDown - true if middle button was pressed

secondaryButtonDown - true if secondary button was pressed

synthesized - if this event was synthesized

popupTrigger - whether this event denotes a popup trigger for current platform

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

gestureSource - source object of the ongoing gesture

Since:

JavaFX 8.0

Method Details

getGestureSource

public Object getGestureSource()

Returns the source object of the ongoing gesture. Gesture source is the object that started the full press-drag-release gesture (by startFullDrag method being called on it).

Returns:

The source object of the gesture.

toString

public String toString()

Returns a string representation of this MouseDragEvent object.

Overrides:

toString in class MouseEvent

Returns:

a string representation of this MouseDragEvent object.

copyFor

public MouseDragEvent copyFor(Object newSource,
 EventTarget newTarget)

Description copied from class: MouseEvent

Copies this event for a different source and target. In most cases you don't need to use this method, it's called automatically when you fire the event.

Overrides:

copyFor in class MouseEvent

Parameters:

newSource - New event source

newTarget - New event target

Returns:

copy of this event for a different source and target

copyFor

public MouseDragEvent copyFor(Object newSource,
 EventTarget newTarget,
 EventType<? extends MouseEvent> type)

Description copied from class: MouseEvent

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

Overrides:

copyFor in class MouseEvent

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

getEventType

public EventType<MouseDragEvent> 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