Java Tutorial/Swing/Splash Screen
Содержание
A progress bar indicating the progress of application initialization
<source lang="java">
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); }
}</source>
A splash screen for an application
<source lang="java">
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); }
}</source>
JDK6 Splash Screen
<source lang="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; 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(); }
}</source>
SplashScreen in action
<source lang="java">
/*
* 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(); }
}</source>
SplashScreen with custom painting
<source lang="java">
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) { } }
}</source>