1 /*

     2  * Copyright 2000-2008 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.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 

    26 package com.sun.java.swing.ui;

    27 

    28 import java.awt.*;

    29 import java.awt.event.*;

    30 import javax.swing.*;

    31 

    32 public class StatusBar extends JPanel

    33     implements ActionListener, MouseListener

    34 {

    35 

    36     public StatusBar()

    37     {

    38         setLayout(new FlowLayout(0));

    39         setBorder(BorderFactory.createEtchedBorder());

    40         progressBar = new JProgressBar(0, 0, 100);

    41         progressBar.setPreferredSize(new Dimension(60, progressBar.getPreferredSize().height + 2));

    42         progressBar.setVisible(false);

    43         label = new JLabel("                                                                                        ");

    44         preferredSize = new Dimension(getWidth(label.getText()), 2 * getFontHeight());

    45         add(progressBar);

    46         add(label);

    47     }

    48 

    49     public static StatusBar getInstance()

    50     {

    51         if(statusBar == null)

    52             statusBar = new StatusBar();

    53         return statusBar;

    54     }

    55 

    56     public static void setInstance(StatusBar sb)

    57     {

    58         statusBar = sb;

    59     }

    60 

    61     protected int getWidth(String s)

    62     {

    63         FontMetrics fm = getFontMetrics(getFont());

    64         if(fm == null)

    65             return 0;

    66         else

    67             return fm.stringWidth(s);

    68     }

    69 

    70     protected int getFontHeight()

    71     {

    72         FontMetrics fm = getFontMetrics(getFont());

    73         if(fm == null)

    74             return 0;

    75         else

    76             return fm.getHeight();

    77     }

    78 

    79     public Dimension getPreferredSize()

    80     {

    81         return preferredSize;

    82     }

    83 

    84     public void setMessage(String message)

    85     {

    86         label.setText(message);

    87         label.repaint();

    88     }

    89 

    90     public void startBusyBar()

    91     {

    92         forward = true;

    93         if(timer == null)

    94         {

    95             setMessage("");

    96             progressBar.setVisible(true);

    97             timer = new Timer(15, this);

    98             timer.start();

    99         }

   100     }

   101 

   102     public void stopBusyBar()

   103     {

   104         if(timer != null)

   105         {

   106             timer.stop();

   107             timer = null;

   108         }

   109         setMessage("");

   110         progressBar.setVisible(false);

   111         progressBar.setValue(0);

   112     }

   113 

   114     public void actionPerformed(ActionEvent evt)

   115     {

   116         int value = progressBar.getValue();

   117         if(forward)

   118         {

   119             if(value < 100)

   120             {

   121                 progressBar.setValue(value + 1);

   122             } else

   123             {

   124                 forward = false;

   125                 progressBar.setValue(value - 1);

   126             }

   127         } else

   128         if(value > 0)

   129         {

   130             progressBar.setValue(value - 1);

   131         } else

   132         {

   133             forward = true;

   134             progressBar.setValue(value + 1);

   135         }

   136     }

   137 

   138     public void mouseClicked(MouseEvent mouseevent)

   139     {

   140     }

   141 

   142     public void mousePressed(MouseEvent mouseevent)

   143     {

   144     }

   145 

   146     public void mouseReleased(MouseEvent mouseevent)

   147     {

   148     }

   149 

   150     public void mouseExited(MouseEvent evt)

   151     {

   152         setMessage("");

   153     }

   154 

   155     public void mouseEntered(MouseEvent evt)

   156     {

   157         if(evt.getSource() instanceof AbstractButton)

   158         {

   159             AbstractButton button = (AbstractButton)evt.getSource();

   160             Action action = button.getAction();

   161             if(action != null)

   162             {

   163                 String message = (String)action.getValue("LongDescription");

   164                 setMessage(message);

   165             }

   166         }

   167     }

   168 

   169     private static final int PROGRESS_MAX = 100;

   170     private static final int PROGRESS_MIN = 0;

   171     private JLabel label;

   172     private Dimension preferredSize;

   173     private JProgressBar progressBar;

   174     private Timer timer;

   175     private boolean forward;

   176     private static StatusBar statusBar;

   177 

   178 }