sortrendererdecorator.java

《Java2图形设计卷II：Swing》配套光盘源码

import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;

public class SortRendererDecorator implements TableCellRenderer {
	TableCellRenderer realRenderer;	
	JPanel panel;

	public SortRendererDecorator(TableCellRenderer r) {
		realRenderer = r;
	}
	public Component getTableCellRendererComponent(
											JTable table,
										  	Object value,
										  	boolean isSelected,
										  	boolean hasFocus,
										  	int row, int col) {
		Component c = realRenderer.getTableCellRendererComponent(
												table, 
												value, 
												isSelected, 
												hasFocus, 
												row, col);
		embellishComponent(c);

		return panel;
	}
	private void embellishComponent(Component c) {
		if(panel == null) {
			panel = new JPanel();
			panel.setLayout(new BorderLayout());
			panel.add(c, BorderLayout.CENTER);
			panel.add(new JLabel("s"), BorderLayout.EAST);
			panel.add(new JLabel("s"), BorderLayout.WEST);
		}
	}
}