/**
 * AlertDialog displays a modal dialog.<p>
 *
 * Copyright &copy; 1996 Martin Minow. All Rights Reserved.<p>
 *
 * Permission to use, copy, modify, and redistribute this software and its
 * documentation for personal, non-commercial use is hereby granted provided that
 * this copyright notice and appropriate documentation appears in all copies. This
 * software may not be distributed for fee or as part of commercial, "shareware,"
 * and/or not-for-profit endevors including, but not limited to, CD-ROM collections,
 * online databases, and subscription services without specific license.<p>
 *
 * @author <a href="mailto:minow@pobox.com">Martin Minow</a>
 * @version 1.0
 * 1996.07.24
 * 1997.04.12 Make sure preferred size doesn't exceed screen size.
 * Set tabs every 8 characters.
 */
package org.minow.applets.sunsphere;
import java.util.*;
import java.awt.*;
import java.awt.event.*;

/**
 * AlertDialog implements a simple dialog.
 */
import java.util.*;
import java.awt.*;

class AlertDialog extends Dialog
	    implements ActionListener, FocusListener
{

    protected Button	    okButton	= new Button(" OK ");
    
    public AlertDialog(
	    Component		enclosure,
	    String		title,
	    String		text,
	    boolean		isModal
	)
    {
        this(getFrame(enclosure), title, text, isModal);
    }
    public AlertDialog(
	    Frame		frame,
	    String		title,
	    String		text,
	    boolean		isModal
	)
    {
	super(frame, title, isModal);
	setResizable(true);
	okButton.setFont(new Font("SansSerif", Font.PLAIN, 12));
	this.setLayout(new BorderLayout(16, 16));
	this.setFont(new Font("SansSerif", Font.PLAIN, 12));
	this.setBackground(Color.white);
	TextArea textArea = new TextArea();
	textArea.setEditable(false);
	this.add("Center", textArea);
	/*
	 * Create the OK button in a separate panel so it doesn't
	 * stretch across the entire bottom of the window.
	 */
	Panel p = new Panel();
	p.setLayout(new FlowLayout(FlowLayout.CENTER, 0, 16));
	p.add(okButton);
	this.add("South", p);
	okButton.addActionListener(this);
	addFocusListener(this);
	pack();		/* Resize and construct the window  */
	textArea.setText(wrapText(text, textArea.size().width));
	setVisible(true);
    }
    public void actionPerformed(
	    ActionEvent	    event
	)
    {
	if (event.getSource() == okButton) {
	    setVisible(false);
	    dispose();
	}
    }
    public void focusGained(
	    FocusEvent	    event
	)
    {
	okButton.requestFocus();
    }
    public void focusLost(
	    FocusEvent	    event
	)
    {
	okButton.transferFocus();
    }
    public Dimension getPreferredSize()
    {
	Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
	d.width = Math.min(d.width - 4, 324);
	d.height = Math.min(d.height - 32, 242);
	return (d);
    }
    public String wrapText(
	    String		text,
	    int			textWidth
	)
    {
	FontMetrics	fm	    = getFontMetrics(getFont());
	StringBuffer	result	    = new StringBuffer();
	StringTokenizer st	    = new StringTokenizer(text, " \n", true);
	int		spaceWidth  = fm.stringWidth(" ");
	int		cursor	= 0;
	
	while (st.hasMoreTokens()) {
	    String	word	    = st.nextToken();
	    int		wordWidth   = fm.stringWidth(word);
	    if (word.equals("\n")) {
		result.append("\n");
		cursor = 0;
	    }
	    else {
		if (word.equals(" ") == false
		 && (cursor + wordWidth) > textWidth) {
		    result.append("\n");
		    cursor = 0;
		}
		if (word.equals(" ") == false) {
		    if (cursor > 0) {
			result.append(" ");
			cursor += spaceWidth;
		    }
		    result.append(word);
		    cursor += wordWidth;
		}
	    }
	}
	return (result.toString());
    }	
    public static Frame getFrame(
	    Component	    component
	)
    {
	while (component != null && !(component instanceof Frame)) {
	    component = component.getParent();
	}
	return ((Frame) component);
    }
}