Class SingleFileDragInTransferHandler

java.lang.Object

javax.swing.TransferHandler

org.jjazz.uiutilities.api.SingleFileDragInTransferHandler

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

MixConsoleTopComponent.TcTransferHandler

public abstract class SingleFileDragInTransferHandler
extends TransferHandler

A drag'n drop support to accept a single file via drag & drop.

This class takes into account OS specific "glitches" of the Swing drag & drop support : behaviour is different on MacOS, getSourceActions(), createTransferable(), exportDone() can be called several times during a drag operation, but only once for Win/Linux. Also on MacOS the support parameter is not always fully initialized on canImport(), it is fully initialized only when importData() is called.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.TransferHandler

TransferHandler.DropLocation, TransferHandler.TransferSupport

Field Summary

Fields

Modifier and Type	Field	Description
static final ImageIcon	DRAG_MIDI_FILE_ICON

Fields inherited from class javax.swing.TransferHandler

COPY, COPY_OR_MOVE, LINK, MOVE, NONE

Constructor Summary

Constructors

Constructor	Description
SingleFileDragInTransferHandler()

Method Summary

Modifier and Type	Method	Description
boolean	canImport(TransferHandler.TransferSupport support)
static File	getAcceptedFile(TransferHandler.TransferSupport support, Collection<String> extensions)	Check if TransferSupport contains a single file which matches one of the specified extensions.
boolean	importData(TransferHandler.TransferSupport support)

Methods inherited from class javax.swing.TransferHandler

canImport, exportAsDrag, exportToClipboard, getCopyAction, getCutAction, getDragImage, getDragImageOffset, getPasteAction, getSourceActions, getVisualRepresentation, importData, setDragImage, setDragImageOffset

Methods inherited from class java.lang.Object

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

Field Details

DRAG_MIDI_FILE_ICON

public static final ImageIcon DRAG_MIDI_FILE_ICON

Constructor Details

SingleFileDragInTransferHandler

public SingleFileDragInTransferHandler()

Method Details

canImport

public boolean canImport(TransferHandler.TransferSupport support)

Overrides:

canImport in class TransferHandler

importData

public boolean importData(TransferHandler.TransferSupport support)

Overrides:

importData in class TransferHandler

getAcceptedFile

public static File getAcceptedFile(TransferHandler.TransferSupport support,
 Collection<String> extensions)

Check if TransferSupport contains a single file which matches one of the specified extensions.

NOTE: see comment, can return an empty File to avoid a Windows-specific problem.

Parameters:

support -

extensions - List of file extensions such as "sng" or "mid"

Returns:

Null if no accepted file found