启用nimbus时，JDK7中无法透明且未修饰的JFrame [英] Can't transparent and undecorated JFrame in JDK7 when enabling nimbus
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问题描述
看看这张图片：
Look at this picture :
这里是透明框架的代码：
here is the code that transparent's the frame:
GraphicsEnvironment ge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
if (!gd.isWindowTranslucencySupported(TRANSLUCENT)) {
System.err.println(
"Translucency is not supported");
System.exit(0);
}
JFrame.setDefaultLookAndFeelDecorated(true);
这很有效，但在尝试添加
this works good but when trying to enable LookAndFeel by adding
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
}catch(.......)
它给了我这个错误
线程中的异常AWT-EventQueue-0java.awt.IllegalComponentStateException：框架是装饰
Exception in thread "AWT-EventQueue-0" java.awt.IllegalComponentStateException: The frame is decorated
这是什么错误？以及如何解决？
What's this error ? and how to solve it ?
感谢您的回答和建议。
编辑
提问/ CrossPosted
Question Asked/CrossPosted
推荐答案
- 接受 @JamesCherrill on Daniweb ，
1st。在InitialThread上创建的顶级容器必须进行修饰并且isDisplayable（），然后可以使用其余的
1st. Top-Level Container created on InitialThread must be decorated and isDisplayable(), then after is possible whatever with rest of
可能需要通过Swing Timer进行短延迟
problably required short delaying by Swing Timer
。
import java.awt.BorderLayout; import java.awt.Color; import java.awt.Font; import java.awt.Shape; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.geom.Ellipse2D; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.SwingUtilities; import javax.swing.Timer; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class DemoWindows implements ActionListener { public static void main(String[] args) { // create a new demo, and update it every 50 mSec new Timer(30, new DemoWindows()).start(); } int phase = 0; // demo runs a number of consecutive phases int count = 0; // each of which takes a number of timesteps JFrame window1 = new JFrame("Java windows demo"); JLabel text1 = new JLabel("<HTML><H1>Hello" + "<BR>Everyone"); // "<HTML><H1>This is a demo of some of the effects" // + "<BR>that can be achieved with the new Java" // + "<BR>transparent window methods</H1>" // + "<BR>(requires latest version of Java)"); JFrame window2 = new JFrame("Java windows demo"); JLabel text2 = new JLabel("<HTML><center>Java<BR>rocks"); JButton button = new JButton("Whatever"); int w, h, r, x, y; // parameters of iris circle DemoWindows() { // build and diplay the windows window1.add(text1); window1.pack(); window1.setLocationRelativeTo(null); window1.setVisible(true); window2.setUndecorated(true); window2.setBackground(new Color(0, 0, 0, 0)); // alpha <1 = transparent window2.setOpacity(0.0f); text2.setFont(new Font("Arial", 1, 60)); text2.setForeground(Color.red); window2.add(text2); window2.add(button, BorderLayout.SOUTH); window2.pack(); window2.setLocationRelativeTo(null); window2.setVisible(true); // parameters of the smallest circle that encloses window2 // this is the starting pouint for the "iris out" effect w = window2.getWidth(); h = window2.getHeight(); r = (int) Math.sqrt(w * w + h * h) / 2; // radius x = w / 2 - r; // top left coordinates of circle y = h / 2 - r; } @Override public void actionPerformed(ActionEvent e) { try {// L&F changed on Runtime, repeatly fired from Swing Timer UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel"); } catch (ClassNotFoundException ex) { Logger.getLogger(DemoWindows.class.getName()).log(Level.SEVERE, null, ex); } catch (InstantiationException ex) { Logger.getLogger(DemoWindows.class.getName()).log(Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { Logger.getLogger(DemoWindows.class.getName()).log(Level.SEVERE, null, ex); } catch (UnsupportedLookAndFeelException ex) { Logger.getLogger(DemoWindows.class.getName()).log(Level.SEVERE, null, ex); } SwingUtilities.updateComponentTreeUI(window2); // called by timer 20 times per sec // goes thru a number of phases, each a few seconds long switch (phase) { case 0: { // initial pause if (++count > 50) { phase = 1; // go to next phase count = 0; } break; } case 1: { // fade in if (++count < 100) { window2.setOpacity(0.01f * count); } else { phase = 2; // go to next phase count = 0; } break; } case 2: { // move if (++count < 160) { if (count < 28 || count > 80) {// pause for best effect window2.setLocation(window2.getX() + 1, window2.getY() + 1); } } else { phase = 3; // go to next phase count = 0; } break; } case 3: {// iris out if (++count < r) { Shape shape = new Ellipse2D.Double( x + count, y + count, 2 * (r - count), 2 * (r - count)); window2.setShape(shape); } else { phase = 99; // go to final (exit) phase } break; } case 99: System.exit(0); } } }这篇关于启用nimbus时，JDK7中无法透明且未修饰的JFrame的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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