1/* 2 * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/* 25* Panel is a DropTarget 26* 27*/ 28 29import java.awt.*; 30import java.awt.datatransfer.*; 31import java.awt.dnd.*; 32import java.io.*; 33 34 35class DnDTarget extends Panel implements DropTargetListener { 36 //private int dragOperation = DnDConstants.ACTION_COPY | DnDConstants.ACTION_MOVE; 37 Color bgColor; 38 Color htColor; 39 40 DnDTarget(Color bgColor, Color htColor) { 41 super(); 42 setLayout(new FlowLayout()); 43 this.bgColor = bgColor; 44 this.htColor = htColor; 45 setBackground(bgColor); 46 setDropTarget(new DropTarget(this, this)); 47 add(new Label("drop here")); 48 } 49 50 boolean check(DropTargetDragEvent dtde) 51 { 52 if (dtde.getCurrentDataFlavorsAsList().contains(DataFlavor.javaFileListFlavor)) { 53 dtde.acceptDrag(DnDConstants.ACTION_COPY); 54 return true; 55 } 56 return false; 57 } 58 59 public void dragEnter(DropTargetDragEvent dtde) { 60 if(check(dtde)){ 61 setBackground(htColor); 62 repaint(); 63 } 64 } 65 66 public void dragOver(DropTargetDragEvent dtde) { 67 check(dtde); 68 } 69 70 public void dropActionChanged(DropTargetDragEvent dtde) { 71 check(dtde); 72 } 73 74 public void dragExit(DropTargetEvent e) { 75 setBackground(bgColor); 76 repaint(); 77 } 78 79 public void dragScroll(DropTargetDragEvent e) { 80 System.out.println("[Target] dragScroll"); 81 } 82 83 public void drop(DropTargetDropEvent dtde) { 84 System.out.println("[Target] drop"); 85 boolean success = false; 86 dtde.acceptDrop(DnDConstants.ACTION_COPY); 87 if( dtde.getCurrentDataFlavorsAsList().contains(DataFlavor.javaFileListFlavor) ){ 88 System.out.println("[Target] DROP OK!"); 89 try { 90 Transferable transfer = dtde.getTransferable(); 91 java.util.List<File> fl = (java.util.List<File>)transfer.getTransferData(DataFlavor.javaFileListFlavor); 92 for(File f : fl){ 93 add(new Button(f.getCanonicalPath())); 94 System.out.println("[Target] drop file:" + f.getCanonicalPath()); 95 } 96 validate(); 97 } catch(Exception ex) { 98 ex.printStackTrace(); 99 } 100 setBackground(bgColor); 101 repaint(); 102 success = true; 103 } 104 dtde.dropComplete(success); 105 } 106} 107