splashscreen.java

Bluetooth chat Server and Client in j2me

/*
 I BlueTooth You -- Simple BlueTooth talker
 Copyright (C) 2007 Jan Tomka

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 */
package net.sf.btw.ibtu.ui;

import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

/**
 * This class defines an initial appliction canvas -- the splash screen.
 * 
 * @author Jan Tomka
 * TODO Remove OK command and dismiss at any key pressed.
 */
public class SplashScreen extends Canvas {
	/**
	 * Reference to the {@link javax.microedition.lcdui.Display} the splash
	 * screen is displayed on.
	 */
	private Display display;

	/**
	 * Reference to the {@link javax.microedition.lcdui.Displayable} which is to
	 * be set as current after splash screen is OK'ed.
	 */
	private Displayable nextDisplayable;

	/**
	 * Color used to draw background of a splash screen.
	 */
	private final int backgroundColor = 0xffffff;

	/**
	 * Color used to draw the text of a splash screen.
	 */
	private final int textColor = 0xbbbbbb;

	/**
	 * Small font used to draw text of a splash screen.
	 */
	private final Font smallFont = Font.getFont(Font.FACE_PROPORTIONAL,
			Font.STYLE_ITALIC, Font.SIZE_SMALL);

	/**
	 * Large font used to draw text of a splash screen.
	 */
	private final Font largeFont = Font.getFont(Font.FACE_PROPORTIONAL,
			Font.STYLE_ITALIC, Font.SIZE_LARGE);

	/**
	 * Creates new SplashScreen instance.
	 * 
	 * @param display
	 *            Display the splash screen is painted on.
	 * @param nextDisplayable
	 *            Displayable to be switched to after splash screen is OK'ed.
	 */
	public SplashScreen(Display display, Displayable nextDisplayable) {
		super();
		this.display = display;
		this.nextDisplayable = nextDisplayable;
	}

	/**
	 * Paints the splash screen itself.
	 * 
	 * @param g
	 *            {@link Graphics} to paint a splash screen on.
	 */
	// TODO Redo to fit on smaller screens, add the version information.
	public void paint(Graphics g) {
		g.setColor(backgroundColor);
		g.fillRect(0, 0, getWidth(), getHeight());
		
		g.setColor(textColor);
		g.setFont(largeFont);
		
		String str[] = { "BTChat", "(c) 2008 Dimmetrius",
				"" };
		int yOffset[] = { -largeFont.getHeight(), 0, smallFont.getHeight() };
		g.drawString(str[0], getWidth() / 2, getHeight() / 2 + yOffset[0],
				Graphics.BASELINE | Graphics.HCENTER);
		g.setFont(smallFont);
		g.drawString(str[1], getWidth() / 2, getHeight() / 2 + yOffset[1],
				Graphics.BASELINE | Graphics.HCENTER);
		g.drawString(str[2], getWidth() / 2, getHeight() / 2 + yOffset[2],
				Graphics.BASELINE | Graphics.HCENTER);
	}

	public void keyPressed(int keyCode) {
		display.setCurrent(nextDisplayable);
	}
}