/**
* $RCSfile: ,v $
* $Revision: $
* $Date: $
*
* Copyright (C) 2004-2011 Jive Software. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.spark.component;
import org.jivesoftware.spark.util.log.Log;
import javax.swing.JFrame;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import java.awt.dnd.DragSourceDragEvent;
import java.awt.dnd.DragSourceDropEvent;
import java.awt.dnd.DragSourceEvent;
import java.awt.dnd.DragSourceListener;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.io.File;
import java.util.List;
/**
* Creates a DroppableFrame. A droppable frame allows for DnD of file objects from the OS
* onto the actual frame via <code>File</code> object.
*/
public abstract class DroppableFrame extends JFrame implements DropTargetListener, DragSourceListener, DragGestureListener {
private static final long serialVersionUID = -4250762326200861757L;
private DragSource dragSource = DragSource.getDefaultDragSource();
/**
* Creates an Instance of the Droppable Frame.
*/
protected DroppableFrame() {
dragSource.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY_OR_MOVE, this);
}
public void dragDropEnd(DragSourceDropEvent DragSourceDropEvent) {
}
public void dragEnter(DragSourceDragEvent DragSourceDragEvent) {
}
public void dragExit(DragSourceEvent DragSourceEvent) {
}
public void dragOver(DragSourceDragEvent DragSourceDragEvent) {
}
public void dropActionChanged(DragSourceDragEvent DragSourceDragEvent) {
}
public void dragEnter(DropTargetDragEvent dropTargetDragEvent) {
dropTargetDragEvent.acceptDrag(DnDConstants.ACTION_COPY_OR_MOVE);
}
public void dragExit(DropTargetEvent dropTargetEvent) {
}
public void dragOver(DropTargetDragEvent dropTargetDragEvent) {
}
public void dropActionChanged(DropTargetDragEvent dropTargetDragEvent) {
}
public void drop(DropTargetDropEvent dropTargetDropEvent) {
try {
Transferable transferable = dropTargetDropEvent.getTransferable();
if (transferable.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
dropTargetDropEvent.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
List<File> fileList = (List<File>) transferable.getTransferData(DataFlavor.javaFileListFlavor);
for (File aFileList : fileList) {
File file = aFileList;
if (file.isFile()) {
fileDropped(file);
}
if (file.isDirectory()) {
directoryDropped(file);
}
}
dropTargetDropEvent.getDropTargetContext().dropComplete(true);
}
else {
dropTargetDropEvent.rejectDrop();
}
}
catch (Exception io) {
Log.error(io);
dropTargetDropEvent.rejectDrop();
}
}
public void dragGestureRecognized(DragGestureEvent dragGestureEvent) {
}
/**
* Notified when a file has been dropped onto the frame.
*
* @param file the file that has been dropped.
*/
public abstract void fileDropped(File file);
/**
* Notified when a directory has been dropped onto the frame.
*
* @param file the directory that has been dropped.
*/
public abstract void directoryDropped(File file);
}