| /* |
| * Copyright (c) 2009, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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(); |
| } |
| } |