colorpanel.java

包含多个java程序

//ColorPanel.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 * ColorToolbar
 * @author  
 * @version 1.0 05/24/03
 */

/*
interface WidgeMediator
{
	void	widgeChanged(Component widge);
}
//*/

class ColorButton extends JButton
{
	private Color	c;

	public	ColorButton(Color c) {
		super("123");
		this.c = c;
	}

	public Color	getColor() {return c;}
	public void		setColor(Color c) {
		this.c = c;
		repaint();
	}

	public void paint(Graphics g) {
		g.setColor(c);
		g.fill3DRect(0, 0, getWidth(), getHeight(), true);
	}
}

class ColorPanel extends JToolBar implements ActionListener
{
	private WidgeMediator	mediator;
	private JButton		chooseColor = new JButton("Custom");
	private ColorButton	curColor = new ColorButton(Color.black);
	private ColorButton	customColor = new ColorButton(Color.white);
	private ColorButton	colors[]={	new ColorButton(Color.black),
									new ColorButton(Color.blue),
									new ColorButton(Color.cyan),
									new ColorButton(Color.darkGray), 
									new ColorButton(Color.gray),
									new ColorButton(Color.green), 
									new ColorButton(Color.lightGray), 
									new ColorButton(Color.magenta),
									new ColorButton(Color.orange), 
									new ColorButton(Color.pink), 
									new ColorButton(Color.red), 
									new ColorButton(Color.white), 
									new ColorButton(Color.yellow)
								}; 
	
	public ColorPanel(WidgeMediator m) {
		mediator = m;
		setLayout(new FlowLayout());
		add(curColor);
		add(new JLabel("Select"));
		for(int i=0; i<colors.length; ++i){
			add(colors[i]);
			colors[i].addActionListener(this);
		}
		add(chooseColor);
		chooseColor.addActionListener(this);		
		add(customColor);
		customColor.addActionListener(this);
	}

	public Color getColor() {return curColor.getColor();}

	public void actionPerformed(ActionEvent e) {
		Object src = e.getSource();
		if(src == chooseColor) {
			Color c = JColorChooser.showDialog(null, "Choose Color", customColor.getColor());
			if(c != null)
				customColor.setColor(c);			
		} else {
			curColor.setColor( ((ColorButton)src).getColor() );
			mediator.widgeChanged(this);
		}
	}
}