Mega Code Archive
This program demonstrates the splash screen API
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/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
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 3 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.SplashScreen;
import java.awt.Toolkit;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.SwingWorker;
/**
* This program demonstrates the splash screen API.
* @version 1.00 2007-09-21
* @author Cay Horstmann
*/
public class SplashScreenTest
{
private static void drawOnSplash(int percent)
{
Rectangle bounds = splash.getBounds();
Graphics2D g = splash.createGraphics();
int height = 20;
int x = 2;
int y = bounds.height - height - 2;
int width = bounds.width - 4;
Color brightPurple = new Color(76, 36, 121);
g.setColor(brightPurple);
g.fillRect(x, y, width * percent / 100, height);
splash.update();
}
/**
* This method draws on the splash screen.
*/
private static void init1()
{
splash = SplashScreen.getSplashScreen();
if (splash == null)
{
System.err.println("Did you specify a splash image with -splash or in the manifest?");
System.exit(1);
}
try
{
for (int i = 0; i <= 100; i++)
{
drawOnSplash(i);
Thread.sleep(100); // simulate startup work
}
}
catch (InterruptedException e)
{
}
}
/**
* This method displays a frame with the same image as the splash screen.
*/
private static void init2()
{
final Image img = Toolkit.getDefaultToolkit().getImage(splash.getImageURL());
final JFrame splashFrame = new JFrame();
splashFrame.setUndecorated(true);
final JPanel splashPanel = new JPanel()
{
public void paintComponent(Graphics g)
{
g.drawImage(img, 0, 0, null);
}
};
final JProgressBar progressBar = new JProgressBar();
progressBar.setStringPainted(true);
splashPanel.setLayout(new BorderLayout());
splashPanel.add(progressBar, BorderLayout.SOUTH);
splashFrame.add(splashPanel);
splashFrame.setBounds(splash.getBounds());
splashFrame.setVisible(true);
new SwingWorker<Void, Integer>()
{
protected Void doInBackground() throws Exception
{
try
{
for (int i = 0; i <= 100; i++)
{
publish(i);
Thread.sleep(100);
}
}
catch (InterruptedException e)
{
}
return null;
}
protected void process(List<Integer> chunks)
{
for (Integer chunk : chunks)
{
progressBar.setString("Loading module " + chunk);
progressBar.setValue(chunk);
splashPanel.repaint(); // because img is loaded asynchronously
}
}
protected void done()
{
splashFrame.setVisible(false);
JFrame frame = new JFrame();
frame.setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("SplashScreenTest");
frame.setVisible(true);
}
}.execute();
}
public static void main(String args[])
{
init1();
EventQueue.invokeLater(new Runnable()
{
public void run()
{
init2();
}
});
}
private static SplashScreen splash;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 300;
}
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