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/*************************************************************************
*
* $RCSfile: SSR.java,v $
*
* $Revision: 1.3 $
*
* last change: $Author: hr $ $Date: 2003/06/30 15:07:37 $
*
* The Contents of this file are made available subject to the terms of
* the BSD license.
*
* Copyright (c) 2003 by Sun Microsystems, Inc.
* 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.event.ActionListener;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import javax.swing.*;
/** The simple screen reader (SSR) registers at the toolkit as focus listener
and displays information about the currently focused object.
*/
public class SSR
implements ActionListener
{
/** Just pass the control to the SSR class.
*/
public static void main (String args[])
{
new SSR ();
}
/** Create a new instance of the simple screen reader.
*/
public SSR ()
{
Layout ();
// Create the event handler and tell it where to display information
// about the currently focused accessible object.
maEventHandler = new EventHandler ();
maEventHandler.addObjectDisplay (maTextualDisplay);
maEventHandler.addObjectDisplay (maGraphicalDisplay);
}
/** Setup the GUI. It is divided into three areas. The lower half is
ocupied by a message area that logs all the events received from
accessibility objects. The upper half is shared by two different
displays of the currently focused object. On left there is a textual
representation. On the right there is a graphical view of the
objects's outline.
*/
private void Layout ()
{
GridBagConstraints constraints;
JPanel aPanel = new JPanel (true);
aPanel.setLayout (new GridBagLayout());
aPanel.setOpaque (true);
mFrame = new JFrame ("Simple Screen Reader 0.3");
mFrame.setContentPane(aPanel);
mFrame.setSize (600,400);
addComponent (new JLabel ("Focused Object:"),
0,0, 1,1, 0,0, GridBagConstraints.WEST, GridBagConstraints.NONE);
maTextualDisplay = new TextualDisplay ();
addComponent (maTextualDisplay,
0,1, 1,1, 1,1, GridBagConstraints.CENTER, GridBagConstraints.BOTH);
maGraphicalDisplay = new GraphicalDisplay ();
addComponent (maGraphicalDisplay,
1,0, 1,2, 1,1, GridBagConstraints.CENTER, GridBagConstraints.BOTH);
addComponent (new JLabel ("Messages:"),
0,2, 1,1, 0,0, GridBagConstraints.WEST, GridBagConstraints.NONE);
addComponent (MessageArea.Instance(),
0,3, 2,1, 1,1, GridBagConstraints.CENTER, GridBagConstraints.BOTH);
JButton aButton = new JButton ("Quit SSR");
addComponent (aButton,
0,4, 1,1, 0,0, GridBagConstraints.WEST,GridBagConstraints.NONE);
aButton.addActionListener (this);
mFrame.show();
}
/** Add a GUI element with the given constraints to the main window.
*/
private JComponent addComponent (JComponent aComponent,
int x, int y, int width, int height, double weightx, double weighty,
int anchor, int fill)
{
aComponent.setDoubleBuffered (false);
GridBagConstraints aConstraints = new GridBagConstraints();
aConstraints.gridx = x;
aConstraints.gridy = y;
aConstraints.gridwidth = width;
aConstraints.gridheight = height;
aConstraints.weightx = weightx;
aConstraints.weighty = weighty;
aConstraints.anchor = anchor;
aConstraints.fill = fill;
mFrame.getContentPane().add (aComponent, aConstraints);
return aComponent;
}
/** This call-back handles button presses.
*/
public void actionPerformed (java.awt.event.ActionEvent e)
{
if (e.getActionCommand().equals ("Quit SSR"))
{
maEventHandler.finalize ();
System.exit(0);
}
}
/// The main frame that contains all other GUI elements.
private JFrame mFrame;
/// A textutal representation of the currently focused object.
private TextualDisplay maTextualDisplay;
/// A graphical representation of the currently focused object.
private GraphicalDisplay maGraphicalDisplay;
/// The event handler that reacts to all the accessibility events.
private EventHandler maEventHandler;
}
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