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-rw-r--r--odk/examples/DevelopersGuide/Accessibility/MessageArea.java133
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diff --git a/odk/examples/DevelopersGuide/Accessibility/MessageArea.java b/odk/examples/DevelopersGuide/Accessibility/MessageArea.java
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--- a/odk/examples/DevelopersGuide/Accessibility/MessageArea.java
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-/*************************************************************************
- *
- * The Contents of this file are made available subject to the terms of
- * the BSD license.
- *
- * Copyright 2000, 2010 Oracle and/or its affiliates.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Sun Microsystems, Inc. nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *************************************************************************/
-
-import java.awt.Font;
-import java.awt.Rectangle;
-import java.awt.Color;
-import java.awt.Graphics;
-import javax.swing.JScrollPane;
-import javax.swing.JTextArea;
-import javax.swing.JScrollBar;
-
-
-
-/** A message area displays text in a scrollable text widget. It is a
- singleton. Other objects can access it directly to display messages.
-*/
-public class MessageArea
- extends JScrollPane
-{
- public static synchronized MessageArea Instance ()
- {
- if (saInstance == null)
- saInstance = new MessageArea ();
- return saInstance;
- }
-
-
-
-
- /** Create a new message area. This method is private because the class is
- a singleton and may therefore not be instanciated from the outside.
- */
- private MessageArea ()
- {
- maText = new JTextArea();
- maText.setBackground (new Color (255,250,240));
- maText.setFont (new Font ("Helvetica", Font.PLAIN, 9));
- setViewportView (maText);
- setVerticalScrollBarPolicy (JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
- setHorizontalScrollBarPolicy (JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
-
- printMessage (
- "class path is " + System.getProperty ("java.class.path") + "\n");
- }
-
-
-
-
- /** Show the given string at the end of the message area and scroll to make
- it visible.
- */
- public static synchronized void print (String aMessage)
- {
- Instance().printMessage(aMessage);
- }
-
-
-
-
- /** Show the given string at the end of the message area and scroll to make
- it visible.
- */
- public static void println (String aMessage)
- {
- Instance().printMessage (aMessage+"\n");
- }
-
-
- public void paintComponent (Graphics g)
- {
- // Synchronize with the graphics object to prevent paint problems.
- // Remember that this is not done by Swing itself.
- synchronized (g)
- {
- JScrollBar sb = getVerticalScrollBar();
- if (sb != null)
- {
- int nScrollBarValue = sb.getMaximum() - sb.getVisibleAmount() - 1;
- sb.setValue (nScrollBarValue);
- }
- super.paintComponent (g);
- }
- }
-
-
-
-
- /** Append the given string to the end of the text and scroll so that it
- becomes visible. This is an internal method. Use one of the static
- and public ones.
- */
- private synchronized void printMessage (String aMessage)
- {
- maText.append (aMessage);
- }
-
-
-
-
- private static MessageArea saInstance = null;
- private JTextArea maText;
-}