JTable AutoCreateRowSorter导致Swing将表绘制错误 [英] JTable AutoCreateRowSorter causes Swing to Paint the table wrong

问题描述

我已经在Java中创建了一个JTable，并使用了AutoCreateRowSorter方法来帮助对表的列进行排序.

I've created a JTable within java and have used AutoCreateRowSorter method to help sort the columns of the table.

问题是，当我单击列标题以对表进行排序时，它会错误地重新绘制表.显示的第一个图像是打开后的外观.第二张图片显示了单击一次后会发生什么.请注意，数据与列标题重叠.

The issue is when I click on the column header to sort the table it repaints the table wrong. The first image shown is how it looks when opened. The second image shows what happens when I click once. Notice the data overlaps the column headers.

初始JTable

重新绘制了JTable

public class DataTable {
    String[] colNames = {"Aircraft",
             "Track ID",
             "Runway",
             "Operation Type",
             "Number Daily of Operations"};

    public DataTable(){}

    public static void main(String[] args) {
        DataTable tble = new DataTable();
        JFrame window = new JFrame();
        window.setBounds(0, 10, 1000,700);
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.getContentPane().setLayout(new BorderLayout(0, 0));
        window.setContentPane(tble.getfinalPane());
        window.setVisible(true);
    }

    public JPanel getfinalPane(){
        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());

        GridBagConstraints b = new GridBagConstraints();
        b.gridx = 0;
        b.gridy = 0;
        b.fill = GridBagConstraints.BOTH;
        b.anchor = GridBagConstraints.FIRST_LINE_END;
        b.weighty = 500;
        panel.add(getTable(),b);

        return panel;
    }

    public JScrollPane getTable(){
        Object[][] data = {{"Boeing 717",(long) 2459,"01L","Arrival",0.13},{"Boeing 727",(long) 2439,"01R","Arrival",0.12}};
        JTable table = new JTable(data,colNames);
        table.setFont(new Font("Serif",Font.BOLD,20));
        table.getTableHeader().setFont(new Font("Serif",Font.BOLD,20));
        table.getTableHeader().setBackground(new Color(0,0,0,100));
        table.getTableHeader().setBorder(BorderFactory.createMatteBorder(3, 3, 3, 3, Color.BLACK));
        table.getTableHeader().setForeground(Color.WHITE);
        table.setRowHeight(table.getRowHeight()+table.getFont().getSize());
        table.setBackground(new Color(214, 217, 223));
        table.setAutoCreateRowSorter(true);
        DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
        centerRenderer.setHorizontalAlignment(SwingConstants.CENTER);

        for(int i = 0; i < colNames.length; i++){
            table.getColumnModel().getColumn(i).setCellRenderer(centerRenderer);
        }

        JScrollPane scroll = new JScrollPane(table);
        scroll.setBackground(new Color(0,0,0,100));
        table.setFillsViewportHeight(true);

        return scroll;
    }

}

我想知道如何解决此问题.感谢您的帮助.

I'm wondering to how fix this issue. Thanks for the help.

推荐答案

Swing不知道如何将基于alpha的颜色作为背景色处理，它只能与完全透明或完全不透明的组件一起使用.

Swing doesn't know how to deal with alpha based colors as background colors, it's designed to only work with only fully transparent or fully opaque components.

您可以通过扩展这些组件，使其透明并随后自己执行填充操作来伪造它

You can fake it, by extending the components, making them transparent and then performing the fill operation yourself

public class TranslucentScrollPane extends JScrollPane {

    public TranslucentScrollPane() {
        setOpaque(false);
        getViewport().setOpaque(false);
    }

    @Override
    protected void paintComponent(Graphics g) {
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setColor(getBackground());
        g2d.fill(new Rectangle(0, 0, getWidth(), getHeight()));
        super.paintComponent(g2d);
        g2d.dispose();
    }

}

半透明JTableHeader

public class TranslucentTableHeader extends JTableHeader {

    public TranslucentTableHeader() {
        setOpaque(false);
    }

    @Override
    protected void paintComponent(Graphics g) {
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setColor(getBackground());
        g2d.fill(new Rectangle(0, 0, getWidth(), getHeight()));
        super.paintComponent(g2d);
        g2d.dispose();
    }


}

半透明JTable

public class TranslucentTable extends JTable {

    public TranslucentTable() {
        setOpaque(false);
    }

    @Override
    protected void paintComponent(Graphics g) {
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setColor(getBackground());
        g2d.fill(new Rectangle(0, 0, getWidth(), getHeight()));
        getUI().paint(g2d, this);
        g2d.dispose();
    }

    @Override
    protected JTableHeader createDefaultTableHeader() {
        JTableHeader header = new TranslucentTableHeader();
        header.setColumnModel(getColumnModel());
        return header;
    }



}

把它放在一起……

import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                String[] colNames = {"Aircraft",
                         "Track ID",
                         "Runway",
                         "Operation Type",
                         "Number Daily of Operations"};
                Object[][] data = {{"Boeing 717",(long) 2459,"01L","Arrival",0.13},{"Boeing 727",(long) 2439,"01R","Arrival",0.12}};

                JTable table = new TranslucentTable();
                DefaultTableModel model = new DefaultTableModel(data, colNames);
                table.setModel(model);

                table.setFont(new Font("Serif", Font.BOLD, 20));
                table.getTableHeader().setFont(new Font("Serif", Font.BOLD, 20));
                table.getTableHeader().setBackground(new Color(0, 0, 0, 100));
                table.getTableHeader().setBorder(BorderFactory.createMatteBorder(3, 3, 3, 3, Color.BLACK));
                table.getTableHeader().setForeground(Color.WHITE);
                table.setRowHeight(table.getRowHeight() + table.getFont().getSize());
                table.setBackground(new Color(214, 217, 223));
                table.setAutoCreateRowSorter(true);
                DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
                centerRenderer.setHorizontalAlignment(SwingConstants.CENTER);

                for (int i = 0; i < colNames.length; i++) {
                    table.getColumnModel().getColumn(i).setCellRenderer(centerRenderer);
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                frame.getContentPane().setBackground(Color.RED);
                TranslucentScrollPane scrollPane = new TranslucentScrollPane();
                scrollPane.setBackground(new Color(0, 0, 0, 200));
                scrollPane.setViewportView(table);

                frame.add(scrollPane);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

}

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