java - 如何通过单击视觉效果在 JTable 标题内创建 JButton？

Question

尝试了一切，但我无法在 JTable 标头中获取 JButton。我能够让它在那里显示并使用鼠标侦听器来捕获点击，但没有视觉点击效果。有人可以提供一个简单的例子吗？

Answer 1

你可以尝试使用这样的东西。此代码使用 JToggleButton 提供视觉效果。

import java.awt.Component;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.*;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

public class Test {
    private static JTable table;

    public static void main(String[] args) {
        table = new JTable(new Object[][]{{1,2},{2,3}},new Object[]
                {"test", "test2"});

        TableColumn column = table.getColumnModel().getColumn(0);
        column.setHeaderRenderer(new BtnRenderer(column.getHeaderValue()));

        column = table.getColumnModel().getColumn(1);
        column.setHeaderRenderer(new BtnRenderer(column.getHeaderValue()));
        table.getTableHeader().addMouseListener(getHeaderMouseListener());
        JFrame f = new JFrame();
        f.add(new JScrollPane(table));
        f.pack();
        f.setLocationRelativeTo(null);
        f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        f.setVisible(true);
    }

    private static MouseListener getHeaderMouseListener() {
        return new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent arg0) {
                if(arg0.getButton() == 1){
                    int columnAtPoint =
                            table.columnAtPoint(arg0.getPoint());
                    /* Get the header portion of the table, and its column model */
                    JTableHeader header = table.getTableHeader();
                    TableColumnModel columnModel = header.getColumnModel();

                    TableColumn column = columnModel.getColumn(columnAtPoint);
                    BtnRenderer headerRenderer =
                            (BtnRenderer) column.getHeaderRenderer();
                    headerRenderer.actionPerformed();
                } else {
                    super.mousePressed(arg0);
                }
            }
        };
    }
}

class BtnRenderer implements TableCellRenderer {

    private JToggleButton btn;

    public BtnRenderer(Object headerValue) {
        btn = new JToggleButton();
        btn.addActionListener(System.out::println);
        btn.setText(headerValue.toString());
    }

    @Override
    public Component getTableCellRendererComponent(
            JTable arg0,
            Object arg1,
            boolean arg2,
            boolean arg3,
            int arg4,
            int arg5) {
        return btn;
    }

    public void actionPerformed() {
        btn.setSelected(!btn.isSelected());
    }
}