可不可以对JTable里的每个单元格进行鼠标事件的监听？

Question

我继承了JPanel,实现了TableCellRenderer接口，直接在JPanel上的组件上addMouseListener没有效果。应该如何才能对每个单元格实现鼠标监听呢？我想实现鼠标悬停在单元格上单元格背景变化的效果。多谢！

Answer 1

那你要实现鼠标监听事件了，我想，因为我也没做过。
一般是单元格change后才能触发事件，呵呵，楼主要求高了点

Answer 2

谢谢,我自己实现了。在我的Blog上
http://blog.csdn.net/allenchue

Answer 3

import java.awt.*;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Point;
import java.awt.event.MouseEvent;import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.MouseInputListener;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;public class TableRolloverTest {
    public static void main(String[] args) {
        TableModel model = new DefaultTableModel(10, 10);
        JTable table = new JTable(model);
        RolloverRenderer renderer = new RolloverRenderer();
        table.setDefaultRenderer(Object.class, renderer);
        table.addMouseListener(renderer);
        table.addMouseMotionListener(renderer);        JScrollPane sp = new JScrollPane(table);
        JFrame f = new JFrame();
        f.getContentPane().add(sp, BorderLayout.CENTER);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setSize(800, 600);
        f.setLocationRelativeTo(null);
        f.show();
    }
    
    private static class RolloverRenderer extends DefaultTableCellRenderer
                                          implements MouseInputListener
    {
        int row = -1;
        int col = -1;
        JTable table = null;        public Component getTableCellRendererComponent(JTable table,
                Object value, boolean isSelected, boolean hasFocus, int row,
                int column) {
            this.table = table;
            super.getTableCellRendererComponent(table, value,
                    isSelected, hasFocus, row, column);
            if (row == this.row && column == this.col) {
                setBackground(Color.red);
            }
            else if (isSelected) {
                setForeground(table.getSelectionForeground());
                setBackground(table.getSelectionBackground());
            }
            else {
                setBackground(Color.white);
            }
            return this;
        }        public void mouseExited(MouseEvent e) {
            if (table != null) {
                int oldRow = row;
                int oldCol = col;
                row = -1;
                col = -1;
    
                if (oldRow != -1 && oldCol != -1) {
                    Rectangle rect = table.getCellRect(oldRow, oldCol, false);
                    table.repaint(rect);
                }
            }
        }        public void mouseDragged(MouseEvent e) {
            mouseMoved(e);
        }        public void mouseMoved(MouseEvent e) {
            if (table != null) {
                Point p = e.getPoint();
                
                int oldRow = row;
                int oldCol = col;
                row = table.rowAtPoint(p);
                col = table.columnAtPoint(p);                if (oldRow != -1 && oldCol != -1) {
                    Rectangle rect = table.getCellRect(oldRow, oldCol, false);
                    table.repaint(rect);
                }
                if (row != -1 && col != -1) {
                    Rectangle rect = table.getCellRect(row, col, false);
                    table.repaint(rect);
                }
            }
        }        public void mouseClicked(MouseEvent e) {}
        public void mousePressed(MouseEvent e) {}
        public void mouseReleased(MouseEvent e) {}
        public void mouseEntered(MouseEvent e) {}
    }
}