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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.log4j.chainsaw;
19  
20  import java.awt.event.MouseAdapter;
21  import java.awt.event.MouseEvent;
22  
23  import javax.swing.JPopupMenu;
24  
25  
26  /**
27   * 
28   * Ensures that a specific popupMenu is displayed when the relevant
29   * mouse events are trapped.
30   * 
31   * @author Scott Deboy <sdeboy@apache.org>
32   * @author Paul Smith <psmith@apache.org>
33   * 
34   */
35  public class PopupListener extends MouseAdapter {
36    final JPopupMenu popupMenu;
37  
38    public PopupListener(JPopupMenu popupMenu) {
39      this.popupMenu = popupMenu;
40    }
41  
42    public void mousePressed(MouseEvent e) {
43      checkPopup(e);
44    }
45  
46    public void mouseReleased(MouseEvent e) {
47      checkPopup(e);
48    }
49    
50    public void mouseClicked(MouseEvent e)
51    {
52        checkPopup(e);
53    }
54  
55    private void checkPopup(MouseEvent e) {
56      if (e.isPopupTrigger()) {
57        popupMenu.show(e.getComponent(), e.getX(), e.getY());
58      }
59    }
60  }