alertdialog.java

java communications api 3.0

/*
 * @(#)AlertDialog.java	1.7 00/05/04 SMI
 * 
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 * 
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license
 * to use, modify and redistribute this software in source and binary
 * code form, provided that i) this copyright notice and license appear
 * on all copies of the software; and ii) Licensee does not utilize the
 * software in a manner which is disparaging to Sun.
 * 
 * This software is provided "AS IS," without a warranty of any kind.
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
 * ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE
 * SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS
 * BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES,
 * HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING
 * OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * This software is not designed or intended for use in on-line control
 * of aircraft, air traffic, aircraft navigation or aircraft
 * communications; or in the design, construction, operation or
 * maintenance of any nuclear facility. Licensee represents and
 * warrants that it will not use or redistribute the Software for such
 * purposes.
 */
import java.awt.*;
import java.awt.event.*;

/**
 * A single response modal alert dialog. This class is configurable for message
 * and title. The width of the dialog will be longer than the longest message
 * line.  When the OK button is pressed the dialog returns.
 */
public class AlertDialog extends Dialog implements ActionListener {

    /**
     * Creates a new <code>AlertDialog</code> with three lines of message and
     * a title.
     * @param parent Any Frame.
     * @param title The title to appear in the border of the dialog.
     * @param lineOne The first line of the message in the dialog.
     * @param lineTwo The second line of the message in the dialog.
     * @param lineThree The third line of the message in the dialog.
     */
    public AlertDialog(Frame parent, String title, String lineOne, 
		       String lineTwo, String lineThree) {
	super(parent, title, true);

	Panel labelPanel = new Panel();

	labelPanel.setLayout(new GridLayout(3, 1));
	labelPanel.add(new Label(lineOne, Label.CENTER));
	labelPanel.add(new Label(lineTwo, Label.CENTER));
	labelPanel.add(new Label(lineThree, Label.CENTER));
	add(labelPanel, "Center");

	Panel  buttonPanel = new Panel();
	Button okButton = new Button("OK");

	okButton.addActionListener(this);
	buttonPanel.add(okButton);
	add(buttonPanel, "South");

	FontMetrics fm = getFontMetrics(getFont());
	int	    width = Math.max(fm.stringWidth(lineOne), 
				     Math.max(fm.stringWidth(lineTwo), 
					      fm.stringWidth(lineThree)));

	setSize(width + 40, 150);
	setLocation(parent.getLocationOnScreen().x + 30, 
		    parent.getLocationOnScreen().y + 30);
	setVisible(true);
    }

    /**
     * Handles events from the OK button. When OK is pressed the dialog becomes
     * invisible, disposes of its self, and retruns.
     */
    public void actionPerformed(ActionEvent e) {
	setVisible(false);
	dispose();
    } 

}