Java java.awt.dnd Class DropTargetDragEvent（JDK8）

Constructor Detail

• DropTargetDragEvent

  public DropTargetDragEvent(DropTargetContext dtc,
                             Point cursorLocn,
                             int dropAction,
                             int srcActions)

  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.

  Parameters:

  dtc - The DropTargetContext for this operation

  cursorLocn - The location of the "Drag" Cursor's hotspot in Component coordinates

  dropAction - The user drop action

  srcActions - The source drop actions

  Throws:

  NullPointerException - if cursorLocn is null

  IllegalArgumentException - if dropAction is not one of DnDConstants.

  IllegalArgumentException - if srcActions is not a bitwise mask of DnDConstants.

  IllegalArgumentException - if dtc is null.

Method Detail

• getLocation

  public Point getLocation()

  This method returns a Point indicating the Cursor's current location within the Component's coordinates.

  Returns:

  the current cursor location in Component's coords.

• getCurrentDataFlavors

  public DataFlavor[] getCurrentDataFlavors()

  This method returns the current DataFlavors from the DropTargetContext.

  Returns:

  current DataFlavors from the DropTargetContext

• getCurrentDataFlavorsAsList

  public List<DataFlavor> getCurrentDataFlavorsAsList()

  This method returns the current DataFlavors as a java.util.List

  Returns:

  a java.util.List of the Current DataFlavors

• isDataFlavorSupported

  public boolean isDataFlavorSupported(DataFlavor df)

  This method returns a boolean indicating if the specified DataFlavor is supported.

  Parameters:

  df - the DataFlavor to test

  Returns:

  if a particular DataFlavor is supported

• getSourceActions

  public int getSourceActions()

  This method returns the source drop actions.

  Returns:

  the source drop actions

• getDropAction

  public int getDropAction()

  This method returns the user drop action.

  Returns:

  the user drop action

• getTransferable

  public Transferable getTransferable()

  This method returns the Transferable object that represents the data associated with the current drag operation.

  Returns:

  the Transferable associated with the drag operation

  Throws:

  InvalidDnDOperationException - if the data associated with the drag operation is not available

  Since:

  1.5

• acceptDrag

  public void acceptDrag(int dragOperation)

  Accepts the drag. This method should be called from a 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.

  Parameters:

  dragOperation - the operation accepted by the target

• rejectDrag

  public void rejectDrag()

  Rejects the drag as a result of examining either the dropAction or the available DataFlavor types.