我的程序中有两个按钮
JButton button1 = new JButton();
button1.setText("First Button");
JButton button2 = new JButton("Second Button");
我已经尝试更改按钮的 LaF，我可以使用以下代码更改按钮背景颜色
UIManager.put(Button.background new color(134,201,236));
但是当我尝试更改其他键值（例如 "Button.disabled"、"Button[Default+Focused+Pressed].backgroundPainter"）时，代码对我不起作用。
有人可以帮助我如何更改使用 Painter 的默认键值吗？
【问题讨论】：
标签： java swing jbutton look-and-feel nimbus
一定要喜欢 Nimbus。
好的开始，你会想要保持这些值接近......
Button.background = DerivedColor(color=214,217,223 parent=control offsets=0.0,0.0,0.0,0 pColor=214,217,223
Button.contentMargins = javax.swing.plaf.InsetsUIResource[top=6,left=14,bottom=6,right=14]
Button.defaultButtonFollowsFocus = false
Button.disabled = DerivedColor(color=214,217,223 parent=control offsets=0.0,0.0,0.0,0 pColor=214,217,223
Button.disabledText = DerivedColor(color=142,143,145 parent=nimbusDisabledText offsets=0.0,0.0,0.0,0 pColor=142,143,145
Button.focusInputMap = javax.swing.plaf.InputMapUIResource@70e4bd3a
Button.font = javax.swing.plaf.FontUIResource[family=SansSerif,name=sansserif,style=plain,size=12]
Button.foreground = DerivedColor(color=0,0,0 parent=text offsets=0.0,0.0,0.0,0 pColor=0,0,0
ButtonUI = javax.swing.plaf.synth.SynthLookAndFeel
Button[Default+Focused+MouseOver].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@3e5d2085
Button[Default+Focused+Pressed].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@78662669
Button[Default+Focused].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@2988e80b
Button[Default+MouseOver].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@7c508d6d
Button[Default+Pressed].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@2b5ec36a
Button[Default+Pressed].textForeground = DerivedColor(color=255,255,255 parent=nimbusSelectedText offsets=0.0,0.0,0.0,0 pColor=255,255,255
Button[Default].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@62c2ed06
Button[Disabled].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@c6499e5
Button[Disabled].textForeground = DerivedColor(color=142,143,145 parent=nimbusDisabledText offsets=0.0,0.0,0.0,0 pColor=142,143,145
Button[Enabled].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@742746e1
Button[Focused+MouseOver].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@293f9e9c
Button[Focused+Pressed].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@5ce0ec60
Button[Focused].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@7463fda8
Button[MouseOver].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@3a3dad8b
Button[Pressed].backgroundPainter = javax.swing.plaf.nimbus.ButtonPainter@6f231f2e
这些基本上是 Nimbus 用来绘制标准按钮的默认键/值...
基本上，你要做的就是提供你自己的Painter，例如...
public class ButtonPainter implements Painter {
private Color light, dark;
private GradientPaint gradPaint;
public ButtonPainter(Color light, Color dark) {
this.light = light;
this.dark = dark;
}
@Override
public void paint(Graphics2D g, Object c, int w, int h) {
System.out.println("...");
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
gradPaint = new GradientPaint((w / 2.0f), 0, light, (w / 2.0f), (h / 2.0f), dark, true);
g.setPaint(gradPaint);
g.fillRect(2, 2, (w - 5), (h - 5));
Color outline = new Color(0, 85, 0);
g.setColor(outline);
g.drawRect(2, 2, (w - 5), (h - 5));
Color trans = new Color(outline.getRed(), outline.getGreen(), outline.getBlue(), 100);
g.setColor(trans);
g.drawRect(1, 1, (w - 3), (h - 3));
}
}
然后替换UIManager的值
UIManager.getLookAndFeelDefaults().put("Button[Enabled].backgroundPainter", new ButtonPainter(Color.YELLOW, Color.RED));
UIManager.getLookAndFeelDefaults().put("Button[Focused].backgroundPainter", new ButtonPainter(Color.YELLOW, Color.RED));
例如...
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.GridBagLayout;
import java.awt.RenderingHints;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.Painter;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.plaf.ColorUIResource;
public class TestNimbus {
public static void main(String[] args) {
new TestNimbus();
}
public TestNimbus() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
System.out.println(UIManager.get("Button[Default+Focused].backgroundPainter"));
UIManager.getLookAndFeelDefaults().put("Button[Enabled].backgroundPainter", new ButtonPainter(Color.YELLOW, Color.RED));
UIManager.getLookAndFeelDefaults().put("Button[Focused].backgroundPainter", new ButtonPainter(Color.YELLOW, Color.RED));
System.out.println(UIManager.get("Button[Default+Focused].backgroundPainter"));
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
frame.add(new JButton("First Button"));
frame.add(new JButton("Second Button"));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class ButtonPainter implements Painter {
private Color light, dark;
private GradientPaint gradPaint;
public ButtonPainter(Color light, Color dark) {
this.light = light;
this.dark = dark;
}
@Override
public void paint(Graphics2D g, Object c, int w, int h) {
System.out.println("...");
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
gradPaint = new GradientPaint((w / 2.0f), 0, light, (w / 2.0f), (h / 2.0f), dark, true);
g.setPaint(gradPaint);
g.fillRect(2, 2, (w - 5), (h - 5));
Color outline = new Color(0, 85, 0);
g.setColor(outline);
g.drawRect(2, 2, (w - 5), (h - 5));
Color trans = new Color(outline.getRed(), outline.getGreen(), outline.getBlue(), 100);
g.setColor(trans);
g.drawRect(1, 1, (w - 3), (h - 3));
}
}
}
这是一个全局更改，因此所有按钮都会受到此更改的影响。我相信有一种方法可以做到这一点，只有您想要更改的控件会受到影响，但您需要自己做更多的研究；)
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