Class DragSourceEvent

java.lang.Object

java.util.EventObject

java.awt.dnd.DragSourceEvent

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

DragSourceDragEvent, DragSourceDropEvent

public class DragSourceEvent
extends EventObject

This class is the base class for DragSourceDragEvent and DragSourceDropEvent.

DragSourceEvents are generated whenever the drag enters, moves over, or exits a drop site, when the drop action changes, and when the drag ends. The location for the generated DragSourceEvent specifies the mouse cursor location in screen coordinates at the moment this event occurred.

In a multi-screen environment without a virtual device, the cursor location is specified in the coordinate system of the initiator GraphicsConfiguration. The initiator GraphicsConfiguration is the GraphicsConfiguration of the Component on which the drag gesture for the current drag operation was recognized. If the cursor location is outside the bounds of the initiator GraphicsConfiguration, the reported coordinates are clipped to fit within the bounds of that GraphicsConfiguration.

In a multi-screen environment with a virtual device, the location is specified in the corresponding virtual coordinate system. If the cursor location is outside the bounds of the virtual device the reported coordinates are clipped to fit within the bounds of the virtual device.

Since:

1.2

See Also:

• Serialized Form

Field Summary

Fields declared in class EventObject

source

Modifier and Type	Field	Description
protected Object	source	The object on which the Event initially occurred.

Constructor Summary

Constructors

Constructor	Description
DragSourceEvent(DragSourceContext dsc)	Construct a DragSourceEvent given a specified DragSourceContext.
DragSourceEvent(DragSourceContext dsc, int x, int y)	Construct a DragSourceEvent given a specified DragSourceContext, and coordinates of the cursor location.

Method Summary

Modifier and Type	Method	Description
DragSourceContext	getDragSourceContext()	This method returns the DragSourceContext that originated the event.
Point	getLocation()	This method returns a Point indicating the cursor location in screen coordinates at the moment this event occurred, or null if the cursor location is not specified for this event.
int	getX()	This method returns the horizontal coordinate of the cursor location in screen coordinates at the moment this event occurred, or zero if the cursor location is not specified for this event.
int	getY()	This method returns the vertical coordinate of the cursor location in screen coordinates at the moment this event occurred, or zero if the cursor location is not specified for this event.

Methods declared in class EventObject

getSource, toString

Modifier and Type	Method	Description
Object	getSource()	The object on which the Event initially occurred.
String	toString()	Returns a String representation of this EventObject.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
boolean	equals(Object o)	Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. May cause performance issues, deadlocks and hangs.
final Class<? extends Object>	getClass()	Answers the unique instance of java.lang.Class which represents the class of the receiver.
int	hashCode()	Answers an integer hash code for the receiver.
final void	notify()	Causes one thread which is waiting on the receiver to be made ready to run.
final void	notifyAll()	Causes all threads which are waiting on the receiver to be made ready to run.
final void	wait()	Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
final void	wait(long time)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
final void	wait(long time, int frac)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

Constructor Details

DragSourceEvent

public DragSourceEvent(DragSourceContext dsc)

Construct a DragSourceEvent given a specified DragSourceContext. The coordinates for this DragSourceEvent are not specified, so getLocation will return null for this event.

Parameters:

dsc - the DragSourceContext

Throws:

IllegalArgumentException - if dsc is null.

See Also:

• getLocation()

DragSourceEvent

public DragSourceEvent(DragSourceContext dsc,
 int x,
 int y)

Construct a DragSourceEvent given a specified DragSourceContext, and coordinates of the cursor location.

Parameters:

dsc - the DragSourceContext

x - the horizontal coordinate for the cursor location

y - the vertical coordinate for the cursor location

Throws:

IllegalArgumentException - if dsc is null.

Since:

1.4

Method Details

getDragSourceContext

public DragSourceContext getDragSourceContext()

This method returns the DragSourceContext that originated the event.

Returns:

the DragSourceContext that originated the event

getLocation

public Point getLocation()

This method returns a Point indicating the cursor location in screen coordinates at the moment this event occurred, or null if the cursor location is not specified for this event.

Returns:

the Point indicating the cursor location or null if the cursor location is not specified

Since:

1.4

getX

public int getX()

This method returns the horizontal coordinate of the cursor location in screen coordinates at the moment this event occurred, or zero if the cursor location is not specified for this event.

Returns:

an integer indicating the horizontal coordinate of the cursor location or zero if the cursor location is not specified

Since:

1.4

getY

public int getY()

This method returns the vertical coordinate of the cursor location in screen coordinates at the moment this event occurred, or zero if the cursor location is not specified for this event.

Returns:

an integer indicating the vertical coordinate of the cursor location or zero if the cursor location is not specified

Since:

1.4