Module java.desktop

Package java.awt.dnd

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 inherited from class java.util.EventObject

source

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 inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

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 Detail

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