1 /*
2 * Copyright (c) 2001, 2003, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
39 * Create a listener object using the extended class and then register it with
40 * a {@code DragSource}. When the drag enters, moves over, or exits
41 * a drop site, when the drop action changes, and when the drag ends, the
42 * relevant method in the listener object is invoked, and the
43 * {@code DragSourceEvent} is passed to it.
44 * <p>
45 * The drop site is <i>associated with the previous {@code dragEnter()}
46 * invocation</i> if the latest invocation of {@code dragEnter()} on this
47 * adapter corresponds to that drop site and is not followed by a
48 * {@code dragExit()} invocation on this adapter.
49 *
50 * @see DragSourceEvent
51 * @see DragSourceListener
52 * @see DragSourceMotionListener
53 *
54 * @author David Mendenhall
55 * @since 1.4
56 */
57 public abstract class DragSourceAdapter
58 implements DragSourceListener, DragSourceMotionListener {
59
60 /**
61 * Called as the cursor's hotspot enters a platform-dependent drop site.
62 * This method is invoked when all the following conditions are true:
63 * <UL>
64 * <LI>The cursor's hotspot enters the operable part of
65 * a platform-dependent drop site.
66 * <LI>The drop site is active.
67 * <LI>The drop site accepts the drag.
68 * </UL>
69 *
70 * @param dsde the {@code DragSourceDragEvent}
71 */
72 public void dragEnter(DragSourceDragEvent dsde) {}
73
74 /**
75 * Called as the cursor's hotspot moves over a platform-dependent drop site.
76 * This method is invoked when all the following conditions are true:
77 * <UL>
78 * <LI>The cursor's hotspot has moved, but still intersects the
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1 /*
2 * Copyright (c) 2001, 2020, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
39 * Create a listener object using the extended class and then register it with
40 * a {@code DragSource}. When the drag enters, moves over, or exits
41 * a drop site, when the drop action changes, and when the drag ends, the
42 * relevant method in the listener object is invoked, and the
43 * {@code DragSourceEvent} is passed to it.
44 * <p>
45 * The drop site is <i>associated with the previous {@code dragEnter()}
46 * invocation</i> if the latest invocation of {@code dragEnter()} on this
47 * adapter corresponds to that drop site and is not followed by a
48 * {@code dragExit()} invocation on this adapter.
49 *
50 * @see DragSourceEvent
51 * @see DragSourceListener
52 * @see DragSourceMotionListener
53 *
54 * @author David Mendenhall
55 * @since 1.4
56 */
57 public abstract class DragSourceAdapter
58 implements DragSourceListener, DragSourceMotionListener {
59
60 /**
61 * Constructs a {@code DragSourceAdapter}.
62 */
63 protected DragSourceAdapter() {}
64
65 /**
66 * Called as the cursor's hotspot enters a platform-dependent drop site.
67 * This method is invoked when all the following conditions are true:
68 * <UL>
69 * <LI>The cursor's hotspot enters the operable part of
70 * a platform-dependent drop site.
71 * <LI>The drop site is active.
72 * <LI>The drop site accepts the drag.
73 * </UL>
74 *
75 * @param dsde the {@code DragSourceDragEvent}
76 */
77 public void dragEnter(DragSourceDragEvent dsde) {}
78
79 /**
80 * Called as the cursor's hotspot moves over a platform-dependent drop site.
81 * This method is invoked when all the following conditions are true:
82 * <UL>
83 * <LI>The cursor's hotspot has moved, but still intersects the
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