org.xnap.commons.gui.dnd
Class AbstractFileTransferHandler

java.lang.Object
  javax.swing.TransferHandler
      org.xnap.commons.gui.dnd.AbstractFileTransferHandler

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

DefaultTextFieldFileTransferHandler, DefaultTreeFileTransferHandler

public abstract class AbstractFileTransferHandler
extends TransferHandler

Abstract handler class easing drag and drop support of file objects.

Also handles Linux Desktop file drag and drops which don't seem to translate to the DataFlavor.javaFileListFlavor.

Subclasses should override createTransferable(JComponent) and importFiles(JComponent, List).

Author:

Felix Berger

See Also:

Serialized Form

Field Summary

static DataFlavor

linuxURIFlavor URI flavor used for file drag and drops on the Linux desktop.

Fields inherited from class javax.swing.TransferHandler

COPY, COPY_OR_MOVE, MOVE, NONE

Constructor Summary

AbstractFileTransferHandler()

Method Summary

boolean	canImport(JComponent comp, DataFlavor[] transferFlavors) Returns true if one of the supported flavors is either DataFlavor.javaFileListFlavor or linuxURIFlavor.
protected Transferable	createTransferable(JComponent c) Returns null.
int	getSourceActions(JComponent c) Returns TransferHandler.COPY.
boolean	importData(JComponent comp, Transferable t) Overriden to extract the file lists from the different types of transferables.
boolean	importFiles(JComponent comp, List<File> files) Returns false, thus disallowing dropping of files on the component comp.

Methods inherited from class javax.swing.TransferHandler

exportAsDrag, exportDone, exportToClipboard, getCopyAction, getCutAction, getPasteAction, getVisualRepresentation

Methods inherited from class java.lang.Object

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

Field Detail

linuxURIFlavor

public static DataFlavor linuxURIFlavor

URI flavor used for file drag and drops on the Linux desktop.

Constructor Detail

AbstractFileTransferHandler

public AbstractFileTransferHandler()

Method Detail

canImport

public boolean canImport(JComponent comp,
                         DataFlavor[] transferFlavors)

Returns true if one of the supported flavors is either DataFlavor.javaFileListFlavor or linuxURIFlavor.

Overrides:

canImport in class TransferHandler

getSourceActions

public int getSourceActions(JComponent c)

Returns TransferHandler.COPY.

Overrides:

getSourceActions in class TransferHandler

createTransferable

protected Transferable createTransferable(JComponent c)

Returns null.

Subclasses can return a FileTransferable.

Overrides:

createTransferable in class TransferHandler

importFiles

public boolean importFiles(JComponent comp,
                           List<File> files)

Returns false, thus disallowing dropping of files on the component comp.

Subclasses should import the list of files and return true on success.

importData

public boolean importData(JComponent comp,
                          Transferable t)

Overriden to extract the file lists from the different types of transferables.

Overrides:

importData in class TransferHandler