Serializable
public class DropTargetDragEvent extends DropTargetEvent
DropTargetDragEvent
is delivered to a DropTargetListener
via its dragEnter() and dragOver() methods. The DropTargetDragEvent
reports the source drop actions and the user drop action that reflect the current state of the drag operation.
Source drop actions is a bitwise mask of DnDConstants
that represents the set of drop actions supported by the drag source for this drag operation.
User drop action depends on the drop actions supported by the drag source and the drop action selected by the user. The user can select a drop action by pressing modifier keys during the drag operation:
Ctrl + Shift -> ACTION_LINK Ctrl -> ACTION_COPY Shift -> ACTION_MOVEIf the user selects a drop action, the user drop action is one of
DnDConstants
that represents the selected drop action if this drop action is supported by the drag source or DnDConstants.ACTION_NONE
if this drop action is not supported by the drag source. If the user doesn't select a drop action, the set of DnDConstants
that represents the set of drop actions supported by the drag source is searched for DnDConstants.ACTION_MOVE
, then for DnDConstants.ACTION_COPY
, then for DnDConstants.ACTION_LINK
and the user drop action is the first constant found. If no constant is found the user drop action is DnDConstants.ACTION_NONE
.
context
source
Constructor | Description |
---|---|
DropTargetDragEvent |
Construct a DropTargetDragEvent given the DropTargetContext for this operation, the location of the "Drag" Cursor 's hotspot in the Component 's coordinates, the user drop action, and the source drop actions. |
Modifier and Type | Method | Description |
---|---|---|
void |
acceptDrag |
Accepts the drag. |
DataFlavor[] |
getCurrentDataFlavors() |
This method returns the current DataFlavor s from the DropTargetContext . |
List |
getCurrentDataFlavorsAsList() |
This method returns the current DataFlavor s as a java.util.List
|
int |
getDropAction() |
This method returns the user drop action. |
Point |
getLocation() |
This method returns a Point indicating the Cursor 's current location within the Component' s coordinates. |
int |
getSourceActions() |
This method returns the source drop actions. |
Transferable |
getTransferable() |
This method returns the Transferable object that represents the data associated with the current drag operation. |
boolean |
isDataFlavorSupported |
This method returns a boolean indicating if the specified DataFlavor is supported. |
void |
rejectDrag() |
Rejects the drag as a result of examining either the dropAction or the available DataFlavor types. |
getDropTargetContext
getSource, toString
public DropTargetDragEvent(DropTargetContext dtc, Point cursorLocn, int dropAction, int srcActions)
DropTargetDragEvent
given the DropTargetContext
for this operation, the location of the "Drag" Cursor
's hotspot in the Component
's coordinates, the user drop action, and the source drop actions.dtc
- The DropTargetContext for this operationcursorLocn
- The location of the "Drag" Cursor's hotspot in Component coordinatesdropAction
- The user drop actionsrcActions
- The source drop actionsNullPointerException
- if cursorLocn is nullIllegalArgumentException
- if dropAction is not one of DnDConstants
.IllegalArgumentException
- if srcActions is not a bitwise mask of DnDConstants
.IllegalArgumentException
- if dtc is null
.public Point getLocation()
Point
indicating the Cursor
's current location within the Component'
s coordinates.Component
's coords.public DataFlavor[] getCurrentDataFlavors()
DataFlavor
s from the DropTargetContext
.public List<DataFlavor> getCurrentDataFlavorsAsList()
DataFlavor
s as a java.util.List
java.util.List
of the Current DataFlavor
spublic boolean isDataFlavorSupported(DataFlavor df)
boolean
indicating if the specified DataFlavor
is supported.df
- the DataFlavor
to testpublic int getSourceActions()
public int getDropAction()
public Transferable getTransferable()
InvalidDnDOperationException
- if the data associated with the drag operation is not availablepublic void acceptDrag(int dragOperation)
DropTargetListeners dragEnter
, dragOver
, and dropActionChanged
methods if the implementation wishes to accept an operation from the srcActions other than the one selected by the user as represented by the dropAction
.dragOperation
- the operation accepted by the targetpublic void rejectDrag()
dropAction
or the available DataFlavor
types.
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Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/dnd/DropTargetDragEvent.html