01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * The contents of this file are subject to the terms of either the GNU
07: * General Public License Version 2 only ("GPL") or the Common
08: * Development and Distribution License("CDDL") (collectively, the
09: * "License"). You may not use this file except in compliance with the
10: * License. You can obtain a copy of the License at
11: * http://www.netbeans.org/cddl-gplv2.html
12: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
13: * specific language governing permissions and limitations under the
14: * License. When distributing the software, include this License Header
15: * Notice in each file and include the License file at
16: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
17: * particular file as subject to the "Classpath" exception as provided
18: * by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the
20: * License Header, with the fields enclosed by brackets [] replaced by
21: * your own identifying information:
22: * "Portions Copyrighted [year] [name of copyright owner]"
23: *
24: * Contributor(s):
25: *
26: * The Original Software is NetBeans. The Initial Developer of the Original
27: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
28: * Microsystems, Inc. All Rights Reserved.
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30: * If you wish your version of this file to be governed by only the CDDL
31: * or only the GPL Version 2, indicate your decision by adding
32: * "[Contributor] elects to include this software in this distribution
33: * under the [CDDL or GPL Version 2] license." If you do not indicate a
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35: * your version of this file under either the CDDL, the GPL Version 2 or
36: * to extend the choice of license to its licensees as provided above.
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38: * Version 2 license, then the option applies only if the new code is
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40: */
41:
42: package org.openide.windows;
43:
44: import java.awt.datatransfer.DataFlavor;
45: import java.awt.dnd.DropTargetDragEvent;
46: import java.awt.dnd.DropTargetDropEvent;
47:
48: /**
49: * When an implementation of this class is available in the global Lookup and
50: * an object is being dragged over some parts of the main window of the IDE then
51: * the window system may call methods of this class to decide whether it can
52: * accept or reject the drag operation. And when the object is actually dropped
53: * into the IDE then this class will be asked to handle the drop.
54: *
55: * @since 6.7
56: *
57: * @author S. Aubrecht
58: */
59: public abstract class ExternalDropHandler {
60:
61: /**
62: * @return True if the dragged object can be dropped into the IDE, false
63: * if the DataFlavor(s) are not supported.
64: */
65: public abstract boolean canDrop(DropTargetDragEvent e);
66:
67: /**
68: * This method is called when the dragged object is already dropped to decide
69: * whether the drop can be accepted.
70: *
71: * @return True if the dropped object is supported (i.e. handleDrop method
72: * can process the object), false otherwise.
73: */
74: public abstract boolean canDrop(DropTargetDropEvent e);
75:
76: /**
77: * When an object is dropped into the IDE this method must process it (e.g.
78: * open the dropped file in a new editor tab).
79: *
80: * @return True if the dropped object was processed successfully, false otherwise.
81: */
82: public abstract boolean handleDrop(DropTargetDropEvent e);
83: }
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