更改 JTable 非内容背景颜色

Question

我正在编写一个自定义主题，它是NimbusLookAndFeel 的扩展。 我想重新设计表格主题，如

我的表格主题代码

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints;
import java.awt.geom.RoundRectangle2D;

import javax.swing.Painter;

import infotrax.nimbus.NimbusBaseUI;

public class TableTheme {

    protected int strokeSize = 2; // changed to 2 from 1 to fill the gap in corners 
    protected Color shadowColor = new Color(128, 128, 128, 140);
    protected boolean shady = true;
    protected boolean highQuality = false;
    /** Double values for Horizontal and Vertical radius of corner arcs */
    protected Dimension arcs = new Dimension(10, 10);
    /** Distance between shadow border and opaque panel border */
    protected int shadowGap = 1;
    /** The offset of shadow. */
    protected int shadowOffset = 1; // width of the shadow
    /** The transparency value of shadow. ( 0 - 255) */
    protected int shadowAlpha = 130;

    public TableTheme(NimbusBaseUI nimbusUI) {

        Insets ins = new Insets(2,2,2,2);
        nimbusUI.getDefaults().put("Table.contentMargins",ins
                );


        nimbusUI.getDefaults().put("Table.background",
                new Color(255, 255, 255)); // Modified to set background color of table to be white 01/08/2016




        nimbusUI.getDefaults().put(
                "Table.borderPainter",
                new TableBorderPaintGradient(new Color(255, 255, 255), new Color(255,
                        255, 255)));

        nimbusUI.getDefaults().put(
                "Table[Enabled].borderPainter",
                new TableBorderPaintGradient(new Color(255, 255, 255), new Color(255,
                        255, 255)));

        nimbusUI.getDefaults().put(
                "Table[Enabled+Selected].borderPainter",
                new TableBorderPaintGradient(new Color(255, 255, 255), new Color(255,
                        255, 255)));

        nimbusUI.getDefaults().put(
                "Table[Selected].borderPainter",
                new TableBorderPaintGradient(new Color(255, 255, 255), new Color(255,
                        255, 255)));

        nimbusUI.getDefaults().put(
                "Table[Focused].borderPainter",
                new TableBorderPaintGradient(new Color(255, 255, 255), new Color(255,
                        255, 255)));

        nimbusUI.getDefaults().put(
                "Table[Disabled].borderPainter",
                new TableBorderPaintGradient(new Color(255, 255, 255), new Color(255,
                        255, 255)));

        nimbusUI.getDefaults().put("TableHeader.font",
                new Font("Myriad Pro Light", Font.BOLD, 13));
        // Table Header color 
        nimbusUI.getDefaults()
                .put("TableHeader:\"TableHeader.renderer\"[MouseOver].backgroundPainter",
                        new TableheaderPainter(new Color(188,188,188),
                                new Color(188,188,188)));
        nimbusUI.getDefaults()
                .put("TableHeader:\"TableHeader.renderer\"[Enabled].backgroundPainter",
                        new TableheaderPainter(new Color(188,188,188),
                                new Color(188,188,188)));

    }

    public class TableheaderPainter implements Painter {

        private static final long serialVersionUID = 1L;
        private Color light, dark;
        private GradientPaint gradPaint;

        public TableheaderPainter(Color light, Color dark) {
            this.light = light;
            this.dark = dark;
        }

        @Override
        public void paint(Graphics2D paramGraphics2D, Object paramT,
                int paramInt1, int paramInt2) {
            paramGraphics2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                    RenderingHints.VALUE_ANTIALIAS_ON);
            gradPaint = new GradientPaint((paramInt1 / 2.0f), 0, light,
                    (paramInt1 / 2.0f), (paramInt2 / 2.0f), dark, true);
            paramGraphics2D.setPaint(gradPaint);
            paramGraphics2D.fillRoundRect(0, 0, (paramInt1 - 0),
                    (paramInt2 - 0), 0, 0);

        }
    }



    public class Tablebackground_Painter implements Painter {

        private Color light, dark;
        private GradientPaint gradPaint;
        int shadowGap = 2;

        public Tablebackground_Painter(Color light, Color dark) {
            this.light = light;
            this.dark = dark;
        }

        @Override
        public void paint(Graphics2D g, Object c, int w, int h) {

            Color shadowColorA = new Color(shadowColor.getRed(),
                    shadowColor.getGreen(), shadowColor.getBlue(), shadowAlpha);
            if (highQuality) {
                g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
            }
            if (shady) {
                g.setColor(shadowColorA);
                g.fillRoundRect(shadowOffset,// X position
                        shadowOffset,// Y position
                        w - strokeSize - shadowOffset, // width
                        h - strokeSize - shadowOffset, // height
                        arcs.width, arcs.height);// arc Dimension
            } else {
                shadowGap = 1;
            }
            gradPaint = new GradientPaint((w / 2.0f), 0, new Color(255, 255,
                    255), (w / 2.0f), (h / 2.0f), new Color(255, 255, 255),
                    false);
            g.setPaint(gradPaint);

            g.fillRoundRect(0, 0, w - shadowGap, h - shadowGap, arcs.width,
                    arcs.height);
            g.setColor(Color.GREEN);
            g.setStroke(new BasicStroke(strokeSize));
            g.drawRoundRect(0, 0, w - shadowGap, h - shadowGap, arcs.width,
                    arcs.height);
            g.setStroke(new BasicStroke());

        }
    }

    public class TableBorderPainter implements Painter {
        private Color light, dark;
        private GradientPaint gradPaint;

        public TableBorderPainter(Color light, Color dark) {
            this.light = light;
            this.dark = dark;
        }

        @Override
        public void paint(Graphics2D g, Object c, int w, int h) {
            g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                    RenderingHints.VALUE_ANTIALIAS_ON);
            gradPaint = new GradientPaint((w / 2.0f), 0, new Color(255, 255,
                    255), (w / 2.0f), (h / 2.0f), new Color(255, 255, 255), true); // making background of border paint to white to match the list background 
            g.setPaint(gradPaint);
            g.fillRoundRect(0, 0, (w - 0), (h - 0), 10, 10);
            RoundRectangle2D roundedRectangle = new RoundRectangle2D.Float(0,
                    0, w - 1, h - 1, 10, 10);
            g.setColor(Color.RED); // here we are making  red border color for list 
            g.draw(roundedRectangle);
        }

    }


    public class TableBorderPaintGradient implements Painter {

        private Color light, dark;
        private GradientPaint gradPaint;
        protected int strokeSize = 1;
        protected Color shadowColor = new Color(128, 128, 128, 140);
        /** Sets if it drops shadow */
        protected boolean shady = true;
        /** Sets if it has an High Quality view */
        protected boolean highQuality = false;
        /** Double values for Horizontal and Vertical radius of corner arcs */
        protected Dimension arcs = new Dimension(10, 10);
        /** Distance between shadow border and opaque panel border */
        protected int shadowGap = 1;
        /** The offset of shadow. */
        protected int shadowOffset = 1; // width of the shadow
        /** The transparency value of shadow. ( 0 - 255) */
        protected int shadowAlpha = 130;

        public TableBorderPaintGradient(Color light, Color dark) {
            this.light = light;
            this.dark = dark;
        }

        @Override
        public void paint(Graphics2D g, Object object, int w, int h) {

            Color shadowColorA = new Color(shadowColor.getRed(),
                    shadowColor.getGreen(), shadowColor.getBlue(), shadowAlpha);
            if (highQuality) {
                g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
            }
            if (shady) {
                g.setColor(shadowColorA);
                g.drawRoundRect(0, 0, w - shadowGap, h - shadowGap, arcs.width,
                        arcs.height);
            } else {
                shadowGap = 1;
            }
            gradPaint = new GradientPaint(0, 0, light, 0, h * .5f, dark, false);
            g.setPaint(gradPaint);
            g.drawRoundRect(shadowOffset,// X position
                    shadowOffset,// Y position
                    w - strokeSize - shadowOffset, // width
                    h - strokeSize - shadowOffset, // height
                    arcs.width, arcs.height);// arc Dimension
            g.setColor(new Color(166,166,166));
            g.setStroke(new BasicStroke(strokeSize));
            g.drawRoundRect(shadowOffset,// X position
                    shadowOffset,// Y position
                    w - strokeSize - shadowOffset, // width
                    h - strokeSize - shadowOffset, // height
                    arcs.width, arcs.height);// arc Dimension
            /* Changed to fillRoundedRect to drawRoundRect as per veryant suggestion */
            g.setStroke(new BasicStroke());

        }

    }


}

并扩展 NimbusLookAndFeel 并设置为默认应用我在 Java 中的所有组件 NimbusBaseUI

import javax.swing.UIManager;
import javax.swing.plaf.nimbus.NimbusLookAndFeel;
public class NimbusBaseUI extends NimbusLookAndFeel {
    public NimbusBaseUI() {
        super(); // Initialisation and installating
        try {
          new TableTheme(this);
            UIManager.setLookAndFeel(this);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void initialize() {
        // TODO Auto-generated method stub
        super.initialize();
    }

}

我的Mainclass是这样的

import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;

class NimbusBaseDemo extends JFrame {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    JTextField jtxt, txtDisEnabled;
    int i;

    private UIManager.LookAndFeelInfo[] lafs;

    public NimbusBaseDemo() {
        try {

            // Set nimbus look and feel. nimbusBase works only for it.
            new NimbusBaseUI();

        } catch (Exception e) {
            e.printStackTrace();
        }

        setTitle("Nimbus Base Demo");
        setSize(400, 400);
        setLayout(new FlowLayout());
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        String columnNames[] = { "Column 1", "Column 2", "Column 3" ,"Column 4"};
          String dataValues[][] = { { "12", "234", "67", " " },
            { "-123", "43", "853", "" }, { "93", "89.2", "109",""},
            { "279", "9033", "3092",""} };

        JTable table1 = new JTable(dataValues, columnNames);
        JScrollPane scrollPane = new JScrollPane(table1);
        add(scrollPane);



    }

    public static void main(String args[]) {

        new NimbusBaseDemo();
    }
}

最后我得到了 result 作为

但我无法将 JTable（非内容区域）的背景更改为白色...

请提出建议。

Answer 1

要将JTable组件的全部空间用于行，您需要设置setFillsViewportHeight参数：

table.setFillsViewportHeight(true);

这会将白色区域扩展到表格底部。

这是doc 的说法：

设置此表是否总是足够大以填充封闭视口的高度。如果表格的首选高度小于视口，则表格将被拉伸以填充视口。换句话说，这确保了表格永远不会小于视口。此属性的默认值为 false。

没有这个，它只是可见的 JScrollPane（或插入 JTable 的组件），所以需要更新的是背景。​​

PS：这不是一个真正的主题问题，因为这是 JTable 的预期行为，它只使用所需的空间，除非你告诉它使用完整的空间。