我想为应用程序中的所有JPanel使用不同的背景颜色。使用Nimbus外观时我该怎么做?
我按照Changing the Color Theme更改Nimbus外观中的组件颜色。
它只在某些情况下有效,随机。如果我在更改颜色之前设置了PropertyChagneListener
,则只会通知一次。
以下是一些测试代码:
public class RedPanels extends JFrame {
public RedPanels() {
JPanel panel = new JPanel();
add(panel);
setPreferredSize(new Dimension(100, 100));
pack();
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
UIManager.getDefaults().addPropertyChangeListener(
new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent event) {
if (event.getPropertyName().equals("Panel.background")) {
System.out.println("color changed");
}
});
UIManager.put("Panel.background", new Color(255,0,0));
break;
}
}
} catch (Exception e) {
// Nimbus is not available.
}
new RedPanels();
}
});
}
}
答案 0 :(得分:6)
UIManager.getLookAndFeelDefaults().put("Panel.background", Color.RED);
答案 1 :(得分:2)
有三种方式
1)覆盖nimbusBase
DerivedColor
2)创建自己的Painter
,只有一个例子 - > aephyr codesource,
3)简单而肮脏的黑客直接设置颜色
import java.awt.*;
import javax.swing.*;
import javax.swing.border.LineBorder;
public class NimbusJPanelBackGround {
public NimbusJPanelBackGround() {
JPanel p = new JPanel();
UIDefaults nimbusOverrides = new UIDefaults();
nimbusOverrides.put("Panel.background", Color.blue);
p.putClientProperty("Nimbus.Overrides", nimbusOverrides);
SwingUtilities.updateComponentTreeUI(p);
JPanel p1 = new JPanel();
nimbusOverrides = new UIDefaults();
nimbusOverrides.put("Panel.background", Color.green);
p1.putClientProperty("Nimbus.Overrides", nimbusOverrides);
SwingUtilities.updateComponentTreeUI(p1);
p1.setBorder(new LineBorder(Color.black, 1));
JPanel p2 = new JPanel();
nimbusOverrides = new UIDefaults();
nimbusOverrides.put("Panel.background", Color.ORANGE);
p2.putClientProperty("Nimbus.Overrides", nimbusOverrides);
SwingUtilities.updateComponentTreeUI(p2);
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.add(p, BorderLayout.NORTH);
f.add(p1, BorderLayout.CENTER);
f.add(p2, BorderLayout.SOUTH);
f.setSize(200, 100);
f.setLocation(150, 150);
f.setVisible(true);
}
public static void main(String[] args) {
try {
for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(laf.getName())) {
UIManager.setLookAndFeel(laf.getClassName());
}
}
} catch (Exception e) {
e.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
NimbusJPanelBackGround nimbusJPanelBackGround = new NimbusJPanelBackGround();
}
});
}
}
答案 2 :(得分:2)
看起来像jdk6中的一个错误,Panel.background是未采取的属性之一。以下是在jdk7中工作(注意顺序:首先设置颜色,然后是LAF)
UIManager.put("Panel.background", new Color(255,0,0));
UIManager.setLookAndFeel(info.getClassName());
我的猜测是它仍然有点错误,因为Nimbus应该在接收管理器设置的任何变化时更新其属性,因此将序列转换为首先设置Nimbus,然后将颜色设置也应该工作,但是甚至在jdk7
UIManager.setLookAndFeel(info.getClassName());
UIManager.put("Panel.background", new Color(255,0,0));
//UIManager.put("control", Color.MAGENTA);
似乎是特定于Panel.background(并且很可能是其他一些),“控制”在两个jdks中都可以,无论是在设置LAF之前还是之后。