Question

我的程序中有两个按钮

JButton button1 = new JButton();
button1.setText("First Button");
JButton button2 = new JButton("Second Button");

我试图更改按钮的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"Button.disabled"，"Button[Default+Focused+Pressed].backgroundPainter"等其他键值时，代码对我不起作用。有人可以帮我如何更改使用Painter的默认键值吗？

Answer 1

喜欢Nimbus。

好的，首先，你想要保持这些价值接近......

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用于绘制标准按钮的默认键/值...

基本上，您要做的就是提供自己的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));
        }
    }

}

这是一项全局变更，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，只有那些你想要改变的控件会受到影响，但你需要自己做更多的研究;）

在Nimbus LaF中更改JButton的默认键值

1 个答案: