雨云和备用行的颜色(Nimbus and alternate row colors)

2019-07-01 16:51发布

我不明白,在雨云如何备用行着色的作品。 这似乎很疯狂! 我想在这里澄清一些事情。

为了演示,让我们说, 我们需要一个JTable交替红色和粉红色行 (我不关心它的颜色是第一个)。

而不重新定义执行自己的“模2”的事情定制cellRenderers,并没有从JTable中覆盖的任何方法,我想列出一个启动的应用程序时遇到一个JTable 只使用灵气属性自定义备用行颜色之间的强制性措施。

下面是我将遵循以下步骤:

  1. 安装雨云PLAF
  2. 自定义“Table.background”灵气属性
  3. 自定义“Table.alternateRowColor”灵气属性
  4. 创建具有简单的数据/报头一个JTable
  5. 包裹的JTable在JScrollPane中,并将其添加到JFrame
  6. 显示的JFrame

这里的源代码:


public class JTableAlternateRowColors implements Runnable {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new JTableAlternateRowColors());
    }

    @Override
    public void run() {
        try {
            UIManager.setLookAndFeel(new NimbusLookAndFeel());
        } catch (UnsupportedLookAndFeelException e) {
            e.printStackTrace();
        }

        UIManager.getDefaults().put("Table.background", Color.RED);
        UIManager.getDefaults().put("Table.alternateRowColor", Color.PINK);

        final JFrame jFrame = new JFrame("Nimbus alternate row coloring");
        jFrame.getContentPane().add(new JScrollPane(new JTable(new String[][] {
                {"one","two","three"},
                {"one","two","three"},
                {"one","two","three"}
        }, new String[]{"col1", "col2", "col3"}
        )));
        jFrame.setSize(400, 300);
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jFrame.setVisible(true);
    }
}

这是JDK6代码。 有人能告诉我去错在这里?


按@克列奥帕特拉的评论和整个社会这里的/方式的贡献获得备用行只用雨云性能着色

公共类JTableAlternateRowColors实现Runnable {

public static void main(String[] args) {
    SwingUtilities.invokeLater(new JTableAlternateRowColors());
}

@Override
public void run() {
    try {
        UIManager.setLookAndFeel(new NimbusLookAndFeel());
    } catch (UnsupportedLookAndFeelException e) {
        e.printStackTrace();
    }

    UIManager.put("Table.background", new ColorUIResource(Color.RED));
    UIManager.put("Table.alternateRowColor", Color.PINK);
    UIManager.getLookAndFeelDefaults().put("Table:\"Table.cellRenderer\".background", new ColorUIResource(Color.RED));

    final JFrame jFrame = new JFrame("Nimbus alternate row coloring");
    final JTable jTable = new JTable(new String[][]{
            {"one", "two", "three"},
            {"one", "two", "three"},
            {"one", "two", "three"}
    }, new String[]{"col1", "col2", "col3"});
    jTable.setFillsViewportHeight(true);
    jFrame.getContentPane().add(new JScrollPane(jTable));
    jFrame.setSize(400, 300);
    jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    jFrame.setVisible(true);
}

}

Answer 1:

貌似几个错误的干扰...

为了改变这两个默认的表背景和默认条带化,预期的(不仅是你,我的也一样)UIManager的配置(同样为这尊重alternateRow财产所有的LAF)将是:

UIManager.put("Table.background", Color.RED);
UIManager.put("Table.alternateRowColor", Color.PINK);

不行的,既不是金属,也不是雨云

  • 在金属:无条纹,表是全红
  • 在雨云:分带白/粉红色,这是表格的背景被忽略

第一个根本的原因可以在DefaultTableCellRenderer找到:

Color background = unselectedBackground != null
                        ? unselectedBackground
                        : table.getBackground();
if (background == null || background instanceof javax.swing.plaf.UIResource) {
    Color alternateColor = DefaultLookup.getColor(this, ui, "Table.alternateRowColor");
    if (alternateColor != null && row % 2 != 0) {
        background = alternateColor;
    }
}

它的逻辑是歪:如果的背景是一个将ColorUIResource,相当弱的区别替代颜色仅服用。 无论如何,这导致我们下一次尝试:

UIManager.put("Table.background", new ColorUIResource(Color.RED));
UIManager.put("Table.alternateRowColor", Color.PINK);

这看上去很好(除了一个复选框渲染器的典型问题,但这是另一个错误的故事;-)金属,仍然没有运气的雨云。

下一步是查找雨云默认值 ,这可能是相关的,并应用(设置LAF了!):

UIManager.getLookAndFeelDefaults().put("Table:\"Table.cellRenderer\".background", 
    new ColorUIResource(Color.RED));

编辑 (因为它被要求在评论)

JXTable试图侧步完全的问题 - 它的装置,用于条纹是从HighlighterFactory检索的荧光笔。 需要通过从lookAndFeelDefaults的alternateRowColor财产去脏雨云,并用新的密钥将其添加“UIColorHighlighter.stripingBackground”



Answer 2:

使用Nimbus的属性(+1到@Kleopatra为了证明我错了:(),你可以通过设置交替行颜色

UIManager.put("Table.alternateRowColor", Color.PINK);
UIManager.getLookAndFeelDefaults().put("Table:\"Table.cellRenderer\".background", Color.RED);

或者通过:

延伸JTable并覆盖prepareRenderer(TableCellRenderer renderer, int row, int column)以漆细胞需要( 红色粉红色 )的颜色。

下面是一个简单的例子我也希望它帮助。

额外的功能:它也将重写paintComponent(..)将调用paintEmptyRows(Graphics g)将涂料行的整个高度和宽度JScrollPane ,如果视口,但是这种情况只适用setFillsViewPortHeight设置为trueMyTable

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Rectangle;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.WindowConstants;
import javax.swing.plaf.nimbus.NimbusLookAndFeel;
import javax.swing.table.TableCellRenderer;

public class JTableAlternateRowColors {

    public JTableAlternateRowColors() {
        initComponents();
    }

    public static void main(String[] args) {

        try {
            UIManager.setLookAndFeel(new NimbusLookAndFeel());
        } catch (UnsupportedLookAndFeelException e) {
            e.printStackTrace();
        }

        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new JTableAlternateRowColors();
            }
        });
    }

    private void initComponents() {

        final JFrame jFrame = new JFrame("Nimbus alternate row coloring");

        MyTable table = new MyTable(new String[][]{
                    {"one", "two", "three"},
                    {"one", "two", "three"},
                    {"one", "two", "three"}
                }, new String[]{"col1", "col2", "col3"});

        table.setFillsViewportHeight(true);//will fill the empty spaces too if any

        table.setPreferredScrollableViewportSize(table.getPreferredSize());

        JScrollPane jScrollPane = new JScrollPane(table);

        jFrame.getContentPane().add(jScrollPane);
        jFrame.pack();
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jFrame.setVisible(true);
    }
}

class MyTable extends JTable {

    public MyTable(String[][] data, String[] fields) {
        super(data, fields);
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);

        if (getFillsViewportHeight()) {
            paintEmptyRows(g);
        }
    }

    /**
     * Paints the backgrounds of the implied empty rows when the table model is
     * insufficient to fill all the visible area available to us. We don't
     * involve cell renderers, because we have no data.
     */
    protected void paintEmptyRows(Graphics g) {
        final int rowCount = getRowCount();
        final Rectangle clip = g.getClipBounds();
        if (rowCount * rowHeight < clip.height) {
            for (int i = rowCount; i <= clip.height / rowHeight; ++i) {
                g.setColor(colorForRow(i));
                g.fillRect(clip.x, i * rowHeight, clip.width, rowHeight);
            }
        }
    }

    /**
     * Returns the appropriate background color for the given row.
     */
    protected Color colorForRow(int row) {
        return (row % 2 == 0) ? Color.RED : Color.PINK;
    }

    /**
     * Shades alternate rows in different colors.
     */
    @Override
    public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
        Component c = super.prepareRenderer(renderer, row, column);
        if (isCellSelected(row, column) == false) {
            c.setBackground(colorForRow(row));
            c.setForeground(UIManager.getColor("Table.foreground"));
        } else {
            c.setBackground(UIManager.getColor("Table.selectionBackground"));
            c.setForeground(UIManager.getColor("Table.selectionForeground"));
        }
        return c;
    }
}

参考文献:

  • http://elliotth.blogspot.com/2004/09/alternating-row-colors-in-jtable.html
  • JTable的条纹背景


文章来源: Nimbus and alternate row colors