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/*
* Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* Panel is a DropTarget
*
*/
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.io.*;
class DnDTarget extends Panel implements DropTargetListener {
private int dragOperation = DnDConstants.ACTION_COPY | DnDConstants.ACTION_MOVE;
Color bgColor;
Color htColor;
DnDTarget(Color bgColor, Color htColor) {
super();
this.bgColor = bgColor;
this.htColor = htColor;
setBackground(bgColor);
setDropTarget(new DropTarget(this, this));
}
public void dragEnter(DropTargetDragEvent e) {
System.out.println("[Target] dragEnter");
setBackground(htColor);
repaint();
}
public void dragOver(DropTargetDragEvent e) {
System.out.println("[Target] dragOver");
}
public void dragExit(DropTargetEvent e) {
System.out.println("[Target] dragExit");
setBackground(bgColor);
repaint();
}
public void dragScroll(DropTargetDragEvent e) {
System.out.println("[Target] dragScroll");
}
public void dropActionChanged(DropTargetDragEvent e) {
System.out.println("[Target] dropActionChanged");
}
public void drop(DropTargetDropEvent dtde) {
System.out.println("[Target] drop");
boolean success = false;
if ((dtde.getDropAction() & dragOperation) == 0) {
dtde.rejectDrop();
Label label = new Label("[no links here :) ]");
label.setBackground(Color.cyan);
add(label);
} else {
dtde.acceptDrop(dragOperation);
DataFlavor[] dfs = dtde.getCurrentDataFlavors();
if (dfs != null && dfs.length >= 1){
Transferable transfer = dtde.getTransferable();
try {
Button button = (Button)transfer.getTransferData(dfs[0]);
if( button != null ){
add(button);
success = true;
}
} catch (IOException ioe) {
System.out.println(ioe.getMessage());
return;
} catch (UnsupportedFlavorException ufe) {
System.out.println(ufe.getMessage());
return;
} catch (Exception e) {
System.out.println(e.getMessage());
return;
}
}
}
setBackground(bgColor);
dtde.dropComplete(success);
invalidate();
validate();
repaint();
}
}
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