如何使 JProgressBar 匹配 Windows LaF? [英] How to make JProgressBar match Windows LaF?
问题描述
我已经使用 WindowsLookAndFeel 在 JProgressBar 上工作了一段时间，但我发现与原生进度条有一些主要区别:
I've been working for a while with JProgressBar using WindowsLookAndFeel, but I found some major differences from the native progress bar:
这是正常状态下的原生栏:
Here is the native bar, in its regular state:
虽然这是 Java 的:
While this is Java's:
敏锐的眼睛可能会看到 Java 的顶部白色更亮，绿色也更亮一点.本机也是填充"的.而 Java 的边框是空的.
A sharp eye might see Java's top white color much brighter, and the green a little brighter too. Also the native is "filled" while Java's has an empty border.
现在，本机不确定:
和 Java 的:
闪烁更短，速度也更快(未显示).此外，由于本机看起来像一个发光体，Java 看起来很像一颗彗星".(有尾巴，只有一侧……).
The flicker is much shorter, and much much faster (not shown). Also as the native could look like a glow, Java's looks much like a "comet" (with a tail, only from one side...).
还有我的最后一个问题，被屏蔽的栏:
And my final question, the blocked bar:
这可以用 Java 完成吗?
Can this be done in Java?
推荐答案
- 这只是最后一个问题的一个例子:
- Windows 7(绿色进度条)
- JDK 1.7.0_25 (WindowsLookAndFeel)
import java.awt.*; import java.awt.event.*; import java.awt.image.*; import java.beans.*; import javax.swing.*; import javax.swing.plaf.LayerUI; public class TurnProgressBarRedTest { public JComponent makeUI() { final BoundedRangeModel model = new DefaultBoundedRangeModel(); final BlockedColorLayerUI layerUI = new BlockedColorLayerUI(); final JPanel p = new JPanel(new GridLayout(4, 1, 12, 12)); p.setBorder(BorderFactory.createEmptyBorder(24,24,24,24)); final JProgressBar pb1 = new JProgressBar(model); pb1.setStringPainted(true); p.add(pb1); final JProgressBar pb2 = new JProgressBar(model); pb2.setStringPainted(true); p.add(pb2); p.add(new JProgressBar(model)); p.add(new JLayer<JProgressBar>(new JProgressBar(model), layerUI)); JPanel box = new JPanel(); box.add(new JButton(new AbstractAction("+10") { private int i = 0; @Override public void actionPerformed(ActionEvent e) { model.setValue(i = (i>=100) ? 0 : i + 10); } })); //http://msdn.microsoft.com/en-us/library/windows/desktop/aa511486.aspx box.add(new JCheckBox(new AbstractAction( "<html>Turn the progress bar red<br />"+ " when there is a user recoverable condition<br />"+ " that prevents making further progress.") { @Override public void actionPerformed(ActionEvent e) { boolean b = ((JCheckBox)e.getSource()).isSelected(); pb2.setForeground(b? new Color(255,0,0,100) : pb1.getForeground()); layerUI.isPreventing = b; p.repaint(); } })); JPanel panel = new JPanel(new BorderLayout()); panel.add(p, BorderLayout.NORTH); panel.add(box, BorderLayout.SOUTH); return panel; } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { createAndShowGUI(); } }); } public static void createAndShowGUI() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch(Exception e) { e.printStackTrace(); } JFrame f = new JFrame(); f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); f.getContentPane().add(new TurnProgressBarRedTest().makeUI()); f.setSize(320, 240); f.setLocationRelativeTo(null); f.setVisible(true); } } class BlockedColorLayerUI extends LayerUI<JProgressBar> { public boolean isPreventing = false; private BufferedImage bi; private int prevw = -1; private int prevh = -1; @Override public void paint(Graphics g, JComponent c) { if(isPreventing) { JLayer jlayer = (JLayer)c; JProgressBar progress = (JProgressBar)jlayer.getView(); int w = progress.getSize().width; int h = progress.getSize().height; if(bi==null || w!=prevw || h!=prevh) { bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB); } prevw = w; prevh = h; Graphics2D g2 = bi.createGraphics(); super.paint(g2, c); g2.dispose(); Image image = c.createImage( new FilteredImageSource(bi.getSource(), new RedGreenChannelSwapFilter())); g.drawImage(image, 0, 0, null); } else { super.paint(g, c); } } } class RedGreenChannelSwapFilter extends RGBImageFilter { @Override public int filterRGB(int x, int y, int argb) { int r = (int)((argb >> 16) & 0xff); int g = (int)((argb >> 8) & 0xff); int b = (int)((argb ) & 0xff); return (argb & 0xff000000) | (g<<16) | (r<<8) | (b); } }这篇关于如何使 JProgressBar 匹配 Windows LaF?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！
