statebtn.java

时空图计算和编辑程序

package my_cpt;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.*;
import super_cpt.SuperBtn;
public class StateBtn extends Label{

	/**
	 * 状态键
	 */
	private ActionListener myListener;//我的监听器
	private final ActionEvent myEvent;//我的事件
	protected boolean pressed=false;
	protected String label;
	private boolean isFlash=false;
	public StateBtn(String str)
	{
		label=str;
		myEvent=new ActionEvent(this,ActionEvent.ACTION_PERFORMED,label);
		this.addMouseListener(new MouseAdapter(){
			public void mousePressed(MouseEvent e)
			{//
				if(e.getButton()!=MouseEvent.BUTTON1)return;
				if(!isEnabled())return;
				pressed=true;
				repaint();
			}
			public void mouseReleased(MouseEvent e)
			{//
				if(e.getButton()!=MouseEvent.BUTTON1)return;
				if(!isEnabled())return;
				pressed=false;
				repaint();
				if(myListener!=null)
					myListener.actionPerformed(myEvent);
			}
			public void mouseEntered(MouseEvent e)
			{
				isFlash=true;
				repaint();
				//this.m
			}
			public void mouseExited(MouseEvent e)
			{
				isFlash=false;
				repaint();
			}
		});
	}
	public boolean isDoubleBuffered()
	{
		return true;
	}
	public void setEnabled(boolean bool)
	{
		super.setEnabled(bool);
		repaint();
	}
	public void addActionListener(ActionListener e)
	{
		myListener=e;
	}
	BufferedImage backImage=null;
	Graphics2D g2;
	BasicStroke stroke=new BasicStroke(1.2f);
	GradientPaint paint=null;
	public void update(Graphics g)
	{//初始化背景大小
		int w=getWidth(),h=getHeight();
		if(backImage==null || g2==null){
			backImage=this.getGraphicsConfiguration().createCompatibleImage(w,h);
		    g2=backImage.createGraphics();
			g2.setFont(new Font(g2.getFont().getFontName(),Font.PLAIN,13));
			g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
			//paint=new GradientPaint(0,0,Color.BLUE,0,h/2,Color.WHITE,true);
		}
		g2.setColor(Color.WHITE);
		g2.fillRect(0,0,w,h);
		if(isEnabled())
			g2.setColor(Color.MAGENTA);
		else
			g2.setColor(Color.LIGHT_GRAY);
		if(isEnabled() && isFlash)
			g2.setColor(Color.GREEN);
		if(pressed)
			g2.drawString(label,8,16);
		else
			g2.drawString(label,8,14);
		
		g2.setStroke(stroke);
		g2.drawRect(0,0,w-1,h-1);
		//g2.setPaint(paint);
		//g2.fillRect(w-3,0,3,h-1);
		paint(g);
	}
	public void paint(Graphics g)
	{
		if(backImage==null)
			repaint();
		g.drawImage(backImage,0,0,this);
	}
}