ch.randelshofer.quaqua.filechooser
Class FileTransferHandler

java.lang.Object
  ch.randelshofer.quaqua.filechooser.FileTransferHandler

All Implemented Interfaces:

java.awt.dnd.DropTargetListener, java.util.EventListener

public class FileTransferHandler
extends java.lang.Object
implements java.awt.dnd.DropTargetListener

FileTransferHandler.

Version:

1.0 October 31, 2004 Created.

Author:

Werner Randelshofer

Constructor Summary

FileTransferHandler(javax.swing.JFileChooser fileChooser)
Creates a new instance.

Method Summary

void	dragEnter(java.awt.dnd.DropTargetDragEvent evt) Called while a drag operation is ongoing, when the mouse pointer enters the operable part of the drop site for the DropTarget registered with this listener.
void	dragExit(java.awt.dnd.DropTargetEvent evt) Called while a drag operation is ongoing, when the mouse pointer has exited the operable part of the drop site for the DropTarget registered with this listener.
void	dragOver(java.awt.dnd.DropTargetDragEvent evt) Called when a drag operation is ongoing, while the mouse pointer is still over the operable part of the drop site for the DropTarget registered with this listener.
void	drop(java.awt.dnd.DropTargetDropEvent evt) Called when the drag operation has terminated with a drop on the operable part of the drop site for the DropTarget registered with this listener.
void	dropActionChanged(java.awt.dnd.DropTargetDragEvent evt) Called if the user has modified the current drop gesture.
void	setFileChooser(javax.swing.JFileChooser fileChooser)

Methods inherited from class java.lang.Object

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

Constructor Detail

FileTransferHandler

public FileTransferHandler(javax.swing.JFileChooser fileChooser)

Creates a new instance.

Method Detail

setFileChooser

public void setFileChooser(javax.swing.JFileChooser fileChooser)

dragEnter

public void dragEnter(java.awt.dnd.DropTargetDragEvent evt)

Called while a drag operation is ongoing, when the mouse pointer enters the operable part of the drop site for the DropTarget registered with this listener.

Specified by:

dragEnter in interface java.awt.dnd.DropTargetListener

Parameters:

evt - the DropTargetDragEvent

dragOver

public void dragOver(java.awt.dnd.DropTargetDragEvent evt)

Called when a drag operation is ongoing, while the mouse pointer is still over the operable part of the drop site for the DropTarget registered with this listener.

Specified by:

dragOver in interface java.awt.dnd.DropTargetListener

Parameters:

evt - the DropTargetDragEvent

dropActionChanged

public void dropActionChanged(java.awt.dnd.DropTargetDragEvent evt)

Called if the user has modified the current drop gesture.

Specified by:

dropActionChanged in interface java.awt.dnd.DropTargetListener

Parameters:

evt - the DropTargetDragEvent

dragExit

public void dragExit(java.awt.dnd.DropTargetEvent evt)

Called while a drag operation is ongoing, when the mouse pointer has exited the operable part of the drop site for the DropTarget registered with this listener.

Specified by:

dragExit in interface java.awt.dnd.DropTargetListener

Parameters:

evt - the DropTargetEvent

drop

public void drop(java.awt.dnd.DropTargetDropEvent evt)

Called when the drag operation has terminated with a drop on the operable part of the drop site for the DropTarget registered with this listener.

This method is responsible for undertaking the transfer of the data associated with the gesture. The DropTargetDropEvent provides a means to obtain a Transferable object that represents the data object(s) to be transfered.

From this method, the DropTargetListener shall accept or reject the drop via the acceptDrop(int dropAction) or rejectDrop() methods of the DropTargetDropEvent parameter.

Subsequent to acceptDrop(), but not before, DropTargetDropEvent's getTransferable() method may be invoked, and data transfer may be performed via the returned Transferable's getTransferData() method.

At the completion of a drop, an implementation of this method is required to signal the success/failure of the drop by passing an appropriate boolean to the DropTargetDropEvent's dropComplete(boolean success) method.

Note: The data transfer should be completed before the call to the DropTargetDropEvent's dropComplete(boolean success) method. After that, a call to the getTransferData() method of the Transferable returned by DropTargetDropEvent.getTransferable() is guaranteed to succeed only if the data transfer is local; that is, only if DropTargetDropEvent.isLocalTransfer() returns true. Otherwise, the behavior of the call is implementation-dependent.

Specified by:

drop in interface java.awt.dnd.DropTargetListener

Parameters:

evt - the DropTargetDropEvent