01: /*BEGIN_COPYRIGHT_BLOCK
02: *
03: * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions are met:
08: * * Redistributions of source code must retain the above copyright
09: * notice, this list of conditions and the following disclaimer.
10: * * Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
14: * names of its contributors may be used to endorse or promote products
15: * derived from this software without specific prior written permission.
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17: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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36:
37: package edu.rice.cs.util.swing;
38:
39: import java.awt.event.*;
40:
41: /**
42: * Abstract mouse listener that supports showing a popup menu.
43: * If subclasses override mousePressed() or mouseReleased(), they should
44: * first call the superclass method so that the popup will be shown correctly.
45: * Because of platform differences, we must check for popup trigger both
46: * when the mouse is pressed and when it is released.
47: */
48: public abstract class RightClickMouseAdapter extends MouseAdapter {
49: /**
50: * Performs the action when the popup trigger is received.
51: * Generally shows a popup context menu.
52: * @param e the MouseEvent that is a popup trigger
53: */
54: protected abstract void _popupAction(MouseEvent e);
55:
56: /**
57: * Signals that the mouse has been pressed.
58: * @param e the MouseEvent that just occurred
59: */
60: public void mousePressed(MouseEvent e) {
61: if (e.isPopupTrigger()) {
62: _popupAction(e);
63: }
64: }
65:
66: /**
67: * Signals that the mouse has been released.
68: * @param e the MouseEvent that just occurred
69: */
70: public void mouseReleased(MouseEvent e) {
71: if (e.isPopupTrigger()) {
72: _popupAction(e);
73: }
74: }
75: }
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