DnDTarget.java revision 2129:fd5bf5955e37 
1272343Sngie/*
2272343Sngie * Copyright 2009 Sun Microsystems, Inc.  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.  Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26/*
27* Panel is a DropTarget
28*
29*/
30
31import java.awt.*;
32import java.awt.datatransfer.*;
33import java.awt.dnd.*;
34import java.io.*;
35
36
37class DnDTarget extends Panel implements DropTargetListener {
38    //private int dragOperation = DnDConstants.ACTION_COPY | DnDConstants.ACTION_MOVE;
39    Color bgColor;
40    Color htColor;
41
42    DnDTarget(Color bgColor, Color htColor) {
43        super();
44        setLayout(new FlowLayout());
45        this.bgColor = bgColor;
46        this.htColor = htColor;
47        setBackground(bgColor);
48        setDropTarget(new DropTarget(this, this));
49        add(new Label("drop here"));
50    }
51
52    boolean check(DropTargetDragEvent dtde)
53    {
54        if (dtde.getCurrentDataFlavorsAsList().contains(DataFlavor.javaFileListFlavor)) {
55            dtde.acceptDrag(DnDConstants.ACTION_COPY);
56            return true;
57        }
58        return false;
59    }
60
61    public void dragEnter(DropTargetDragEvent dtde) {
62        if(check(dtde)){
63            setBackground(htColor);
64            repaint();
65        }
66    }
67
68    public void dragOver(DropTargetDragEvent dtde) {
69        check(dtde);
70    }
71
72    public void dropActionChanged(DropTargetDragEvent dtde) {
73        check(dtde);
74    }
75
76    public void dragExit(DropTargetEvent e) {
77        setBackground(bgColor);
78        repaint();
79    }
80
81    public void dragScroll(DropTargetDragEvent e) {
82        System.out.println("[Target] dragScroll");
83    }
84
85    public void drop(DropTargetDropEvent dtde) {
86        System.out.println("[Target] drop");
87        boolean success = false;
88        dtde.acceptDrop(DnDConstants.ACTION_COPY);
89        if( dtde.getCurrentDataFlavorsAsList().contains(DataFlavor.javaFileListFlavor) ){
90            System.out.println("[Target] DROP OK!");
91            try {
92                Transferable transfer = dtde.getTransferable();
93                java.util.List<File> fl = (java.util.List<File>)transfer.getTransferData(DataFlavor.javaFileListFlavor);
94                for(File f : fl){
95                    add(new Button(f.getCanonicalPath()));
96                    System.out.println("[Target] drop file:" + f.getCanonicalPath());
97                }
98                validate();
99            } catch(Exception ex) {
100                ex.printStackTrace();
101            }
102            setBackground(bgColor);
103            repaint();
104            success = true;
105        }
106        dtde.dropComplete(success);
107    }
108}
109