package com.jstatcom.component;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Toolkit;

import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JWindow;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.border.BevelBorder;

/**
 * A SplashScreen for use when starting applications. The splash screen contains
 * a title, and image and a status bar. The status bar can display messages
 * as well as the percentage of completion using a progress bar.
 * @author Tony Johnson
 * @version $Id: SplashScreen.java,v 1.3 2005/09/07 10:24:06 kraetzig Exp $
 */

public class SplashScreen extends JWindow {
	private JProgressBar progress;

	private class UpdateStatus implements Runnable {
		public UpdateStatus(String status, int pc) {
			message = status;
			value = pc;
		}
		public void run() {
			progress.setValue(value);
			progress.setString(message);
		}
		private String message;
		private int value;
	}

	private class CloseSplashScreen implements Runnable {
		public void run() {
			setVisible(false);
			dispose();
		}
	}
	/**
	 * Create a new SplashScreen
	 * @param coolPicture The image to display in the splash screen
	 * @param initialMessage The initial message to display in the progress area
	 * @param title The title of the splash screen window, may be null
	 */
	public SplashScreen(
		Icon coolPicture,
		String initialMessage,
		String title) {
		// Create a JPanel so we can use a BevelBorder
		JPanel panelForBorder = new JPanel(new BorderLayout());
		panelForBorder.setBackground(Color.white);
		panelForBorder.setLayout(new BorderLayout());
		panelForBorder.add(new JLabel(coolPicture), BorderLayout.CENTER);
		if (title != null)
			panelForBorder.add(
				new JLabel(title, SwingConstants.CENTER),
				BorderLayout.NORTH);

		progress = new JProgressBar(0, 100);
		progress.setStringPainted(true);
		progress.setString(initialMessage);

		panelForBorder.add(progress, BorderLayout.SOUTH);
		panelForBorder.setBorder(new BevelBorder(BevelBorder.RAISED));

		getContentPane().add(panelForBorder);
	}
	/**
	 * Close the splash screen and free any resources associated with it.
	 * This method is thread safe and can be called from any thread.
	 */
	public void close() {
		if (isVisible()) {
			SwingUtilities.invokeLater(new CloseSplashScreen());
		}
	}
	/**
	 * Show or hide the splash screen. 
	 * @param show True to display the splash screen
	 */
	public void setVisible(boolean show) {
		if (show) {
			pack();

			// Plonk it on center of screen
			Dimension WindowSize = getSize(),
				ScreenSize = Toolkit.getDefaultToolkit().getScreenSize();
			setBounds(
				(ScreenSize.width - WindowSize.width) / 2,
				(ScreenSize.height - WindowSize.height) / 2,
				WindowSize.width,
				WindowSize.height);
		}
		super.setVisible(show);
	}
	/**
	 * Updates the status bar. This method is thread safe and can be called from
	 * any thread.
	 * @param message The message to display
	 * @param percent The percentage towards completion
	 */
	public void showStatus(String message, int percent) {
		if (isVisible()) {
			SwingUtilities.invokeLater(new UpdateStatus(message, percent));
		}
	}
}