package polarDust.calculator;

/*
 * Copyright (c) 1996 Sorin Lazareanu, All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies.
 *
 */

import java.awt.*;

/**
 * Calculator01 is a frame hosting a simple calculator.<br>
 * Provides the meaning of instantiating the calculator in an 
 * application.
 *
 * <br><br><a href=../source/polarDust/calculator/Calculator01.java>
 * The source code.</a>
 *
 * @version 0.9, 1996.06.04
 * @author Sorin Lazareanu
 */

public class Calculator01 extends Frame {
	boolean bInAnApplet = true;
	CalculatorPanel01 panel;

	/**
	* Constructs a new frame.
	*/
	public Calculator01() {
		super();

		panel = new CalculatorPanel01();
		configure();
	}

	/**
	* Constructs a new frame. The original call is from an CalculatorApplet. 
	* This information is used to send back sound related messages.
	* @see CalculatorApplet
	*/
	public Calculator01(CalculatorApplet parentApplet) {
		super();

		panel = new CalculatorPanel01(parentApplet);
		configure();
	}

	/**
	* Configures the layout of this frame. Invokes a CalculatorPanel01.
	*/
	public void configure() {
		GridBagLayout gridBag = new GridBagLayout();
		GridBagConstraints c = new GridBagConstraints();

 		c.fill = GridBagConstraints.BOTH;
		c.gridx = 0;
		c.gridwidth = 1;
		c.weightx = 1.0;
		c.gridy = 0;
		c.gridheight = 1;
		c.weighty = 1.0;
		gridBag.setConstraints(panel, c);
		setLayout(gridBag);
		add(panel);
	}

	/** 
	* Handles the events related to the destruction of the frame.
	* Must stop() all the threads that use Screen Updater thread.
	*/
	public boolean handleEvent(Event e) {

		if (e.id == Event.WINDOW_DESTROY) {

			if (bInAnApplet) {
				dispose();
				return false;
			} else {
				// panel thread is able to repaint even when
				// Screen Updater has stop running.
				panel.stop();
				System.exit(0);
			}
		}
	   return super.handleEvent(e);
	}

	/**
	* Instantiates a new Calculator01 object. Doesn't take parameters.
	*/
	public static void main(String args[]) {
		Calculator01 aFrame = new Calculator01();
		Insets insets = aFrame.insets();

		aFrame.bInAnApplet = false;
		aFrame.setTitle("Calculator");
		aFrame.resize(
			aFrame.preferredSize().width,
			aFrame.preferredSize().height
		);
		aFrame.show();
	}

	public String toString() {
		return "Calculator01 extends " + super.toString();
	}

}