Java tutorial
/* * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002. * All rights reserved. Software written by Ian F. Darwin and others. * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $ * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's, * pioneering role in inventing and promulgating (and standardizing) the Java * language and environment is gratefully acknowledged. * * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for * inventing predecessor languages C and C++ is also gratefully acknowledged. */ import java.awt.Color; import java.awt.*; import java.awt.Graphics; import java.awt.MediaTracker; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JWindow; /** A simple Splash screen. */ public class Splash extends JWindow { protected ImageIcon im; public Splash(JFrame f, String progName, String fileName) { super(); // Can't use Swing border on JWindow: not a JComponent. // setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED)); im = new ImageIcon(fileName); if (im.getImageLoadStatus() != MediaTracker.COMPLETE) JOptionPane.showMessageDialog(f, "Warning: can't load image " + fileName + "\n" + "Please be sure you have installed " + progName + " correctly", "Warning", JOptionPane.WARNING_MESSAGE); int w = im.getIconWidth(), h = im.getIconHeight(); setSize(w, h); UtilGUI.center(this); addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent e) { dispose(); } }); addKeyListener(new KeyAdapter() { public void keyTyped(KeyEvent e) { dispose(); } }); } public void paint(Graphics g) { im.paintIcon(this, g, 0, 0); g.setColor(Color.green); g.drawRoundRect(0, 0, getWidth() - 1, getHeight() - 1, 7, 7); } } class UtilGUI { /** Centre a Window, Frame, JFrame, Dialog, etc. */ public static void centre(Window w) { // After packing a Frame or Dialog, centre it on the screen. Dimension us = w.getSize(), them = Toolkit.getDefaultToolkit().getScreenSize(); int newX = (them.width - us.width) / 2; int newY = (them.height - us.height) / 2; w.setLocation(newX, newY); } /** * Center a Window, Frame, JFrame, Dialog, etc., but do it the American * Spelling Way :-) */ public static void center(Window w) { UtilGUI.centre(w); } /** Maximize a window, the hard way. */ public static void maximize(Window w) { Dimension us = w.getSize(), them = Toolkit.getDefaultToolkit().getScreenSize(); w.setBounds(0, 0, them.width, them.height); } }