Java Tutorial/Swing/Splash Screen
Содержание
A progress bar indicating the progress of application initialization
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.SplashScreen;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class Main {
public static void main(String args[]) throws Exception{
SplashScreen splash = SplashScreen.getSplashScreen();
Graphics2D g = (Graphics2D) splash.createGraphics();
Dimension dim = splash.getSize();
for (int i = 0; i < 100; i++) {
g.setColor(Color.RED);
g.fillRect(50, 50, dim.width - 100, dim.height - 100);
splash.update();
try {
Thread.sleep(250);
} catch (InterruptedException ignored) {
}
}
JFrame frame = new JFrame("Splash Me2");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel label = new JLabel("Hello, Splash", JLabel.CENTER);
frame.add(label, BorderLayout.CENTER);
frame.setSize(300, 95);
frame.setVisible(true);
}
}
A splash screen for an application
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JWindow;
class SplashScreen extends JWindow {
private int duration;
public SplashScreen(int d) {
duration = d;
JPanel content = (JPanel) getContentPane();
content.setBackground(Color.white);
int width = 450;
int height = 115;
Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
int x = (screen.width - width) / 2;
int y = (screen.height - height) / 2;
setBounds(x, y, width, height);
content.add(new JLabel("asdf"), BorderLayout.CENTER);
Color oraRed = new Color(156, 20, 20, 255);
content.setBorder(BorderFactory.createLineBorder(oraRed, 10));
setVisible(true);
try {
Thread.sleep(duration);
} catch (Exception e) {
}
setVisible(false);
}
public static void main(String[] args) {
SplashScreen splash = new SplashScreen(10000);
}
}
JDK6 Splash Screen
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics2D;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.SplashScreen;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class JDK6SplashTest extends Frame{
static void renderSplashFrame(Graphics2D g, int frame) {
final String[] comps = { "foo", "bar", "baz" };
g.setComposite(AlphaComposite.Clear);
g.fillRect(130, 250, 280, 40);
g.setPaintMode();
g.setColor(Color.BLACK);
g.drawString("Loading " + comps[(frame / 5) % 3] + "...", 130, 260);
g.fillRect(130, 270, (frame * 10) % 280, 20);
}
public JDK6SplashTest() {
super("SplashScreen demo");
setSize(500, 300);
setLayout(new BorderLayout());
Menu m1 = new Menu("File");
MenuItem mi1 = new MenuItem("Exit");
m1.add(mi1);
mi1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
System.exit(0);
}
});
MenuBar mb = new MenuBar();
setMenuBar(mb);
mb.add(m1);
final SplashScreen splash = SplashScreen.getSplashScreen();
if (splash == null) {
System.out.println("SplashScreen.getSplashScreen() returned null");
return;
}
Graphics2D g = (Graphics2D) splash.createGraphics();
if (g == null) {
System.out.println("g is null");
return;
}
for (int i = 0; i < 100; i++) {
renderSplashFrame(g, i);
splash.update();
try {
Thread.sleep(200);
} catch (InterruptedException e) {
}
}
splash.close();
setVisible(true);
toFront();
}
public static void main(String args[]) {
JDK6SplashTest test = new JDK6SplashTest();
}
}
SplashScreen in action
/*
* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of Sun Microsystems nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*/
/*
* SplashDemo.java
*
*/
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics2D;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.SplashScreen;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
public class SplashDemo extends Frame implements ActionListener {
static void renderSplashFrame(Graphics2D g, int frame) {
final String[] comps = { "foo", "bar", "baz" };
g.setComposite(AlphaComposite.Clear);
g.fillRect(120, 140, 200, 40);
g.setPaintMode();
g.setColor(Color.BLACK);
g.drawString("Loading " + comps[(frame / 5) % 3] + "...", 120, 150);
}
public SplashDemo() {
super("SplashScreen demo");
setSize(300, 200);
setLayout(new BorderLayout());
Menu m1 = new Menu("File");
MenuItem mi1 = new MenuItem("Exit");
m1.add(mi1);
mi1.addActionListener(this);
this.addWindowListener(closeWindow);
MenuBar mb = new MenuBar();
setMenuBar(mb);
mb.add(m1);
final SplashScreen splash = SplashScreen.getSplashScreen();
if (splash == null) {
System.out.println("SplashScreen.getSplashScreen() returned null");
return;
}
Graphics2D g = splash.createGraphics();
if (g == null) {
System.out.println("g is null");
return;
}
for (int i = 0; i < 100; i++) {
renderSplashFrame(g, i);
splash.update();
try {
Thread.sleep(90);
} catch (InterruptedException e) {
}
}
splash.close();
setVisible(true);
toFront();
}
public void actionPerformed(ActionEvent ae) {
System.exit(0);
}
private static WindowListener closeWindow = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
e.getWindow().dispose();
}
};
public static void main(String args[]) {
SplashDemo test = new SplashDemo();
}
}
SplashScreen with custom painting
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.SplashScreen;
public class SplashScreenDemo {
public static void main(String[] args) {
SplashScreen splashScreen = SplashScreen.getSplashScreen();
Dimension size = splashScreen.getSize();
int borderDim = (int) (size.height * 0.05);
Graphics g = splashScreen.createGraphics();
g.setColor(Color.blue);
for (int i = 0; i < borderDim; i++)
g.drawRect(i, i, size.width - 1 - i * 2, size.height - 1 - i * 2);
FontMetrics fm = g.getFontMetrics();
int sWidth = fm.stringWidth("Initializing...");
int sHeight = fm.getHeight();
if (sWidth < size.width && 2 * sHeight < size.height) {
g.setColor(Color.blue);
g.drawString("Initializing...", (size.width - sWidth) / 2, size.height
- 2 * sHeight);
}
splashScreen.update();
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
}
}
}
