java中漂亮的进度条 [英] Nice looking progress bar in java
问题描述
我想知道你们是否知道如何在 Java 中显示漂亮的进度条,主要使用 Swing,尽管我不介意使用第三方库.
I'm wondering if any of you know how to display a nice looking progress bar in Java, mostly using Swing, although I don't mind using third-party libraries.
我一直在查看 JProgressBar 教程,但没有一个提到样式栏.阅读 API 时,我发现了一个返回 ProgressBarUI 对象的 getUI 方法,但我没有看到很多自定义该方法的方法.
I've been looking at JProgressBar tutorials but none of them refer to styling the bar. Reading the API I found a getUI method that returns ProgressBarUI object but I don't see many ways to customize that one.
我想要的是添加圆角,改变背景和前景色,宽度,长度,通常的.
What I want is to add rounded corners, change background and foreground color, width, lenght, the usual.
谢谢!
推荐答案
如果不想替换用户选择的 Look &感觉,您可以将 UI 委托替换为从 BasicProgressBarUI
.
If you don't want to replace the user's chosen Look & Feel, you can just replace the UI delegate with one derived from BasicProgressBarUI
.
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.plaf.basic.BasicProgressBarUI;
/** @see http://stackoverflow.com/questions/8884297 */
public class ProgressBarUITest extends JPanel {
public ProgressBarUITest() {
JProgressBar jpb = new JProgressBar();
jpb.setUI(new MyProgressUI());
jpb.setForeground(Color.blue);
jpb.setIndeterminate(true);
this.add(jpb);
}
private static class MyProgressUI extends BasicProgressBarUI {
private Rectangle r = new Rectangle();
@Override
protected void paintIndeterminate(Graphics g, JComponent c) {
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
r = getBox(r);
g.setColor(progressBar.getForeground());
g.fillOval(r.x, r.y, r.width, r.height);
}
}
private void display() {
JFrame f = new JFrame("ProgressBarUITest");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(this);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new ProgressBarUITest().display();
}
});
}
}
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