windowevents.java

掌握java.io.swing中容器类的使用方法

//Demonstate the mouse event in both child and applet window.
import java.awt.*;
import java.awt.event.*;
import java.applet.*;

/*
 <applet code="WindowEvents" width=300 height=100>
 </applet>
*/

class SampleFrame extends Frame implements MouseListener,MouseMotionListener{
	String msg="";
	int mouseX=10,mouseY=40;
	int movX=0,movY=0;
	
	SampleFrame(String title){
		super(title);
		addMouseListener(this);
		addMouseMotionListener(this);
		MyWindowAdapter adapter=new MyWindowAdapter(this);
		addWindowListener(adapter);
		}
	
	public void mouseClicked(MouseEvent me){
		}
	
	public void mouseEntered(MouseEvent me){
		mouseX=10;
		mouseY=54;
		msg="Mouse just entered child window.";
		repaint();
	    }
	
	public void mouseExited(MouseEvent me){
		mouseX=10;
		mouseY=54;
		msg="Mouse just left child window.";
		repaint();
		}
		
	public void mousePressed(MouseEvent me){
		mouseX=me.getX();
		mouseY=me.getY();
		msg="Down.";
		repaint();
		}
	
	public void mouseReleased(MouseEvent me){
		mouseX=me.getX();
		mouseY=me.getY();
		msg="Up.";
		repaint();
		}
		
	public void mouseDragged(MouseEvent me){
		mouseX=me.getX();
		mouseY=me.getY();
		movX=me.getX();
		movY=me.getY();
		msg="*";
		repaint();
		}
	
	public void mouseMoved(MouseEvent me){
        movX=me.getX();
		movY=me.getY();
		repaint(0,0,100,60);
		}
	
	public void paint(Graphics g){
		g.drawString(msg,mouseX,mouseY);
		g.drawString("Mouse at "+movX+","+movY,10,40);
		}
	}

class MyWindowAdapter extends WindowAdapter{
	SampleFrame sampleFrame;
	public MyWindowAdapter(SampleFrame sampleFrame){
		this.sampleFrame=sampleFrame;
		}
	
	public void windowClosing(WindowEvent we){
		sampleFrame.setVisible(false);
		}	
	}

public class WindowEvents extends Applet implements MouseListener,MouseMotionListener{
	SampleFrame f;
	String msg="";
	int mouseX=0,mouseY=0;
	int movX=0,movY=0;
	
	public void init(){
		f=new SampleFrame("Handle Mouse Events");
		
		f.setSize(300,200);
		f.setVisible(true);
		
		addMouseListener(this);
		addMouseMotionListener(this);
		}
	
	public void start(){
		f.setVisible(true);
		}
	
	public void stop(){
		f.setVisible(false);
		}
	public void mouseClicked(MouseEvent me){
		}
	
	public void mouseEntered(MouseEvent me){
		mouseX=10;
		mouseY=24;
		msg="Mouse just entered applet window.";
		repaint();
	    }
	    
	public void mouseExited(MouseEvent me){
		mouseX=10;
		mouseY=24;
		msg="Mouse just left applet window.";
		repaint();
		}
	
	public void mousePressed(MouseEvent me){
		mouseX=me.getX();
		mouseY=me.getY();
		msg="Down.";
		repaint();
		}
	
	public void mouseReleased(MouseEvent me){
		mouseX=me.getX();
		mouseY=me.getY();
		msg="Up.";
		repaint();
		}
		
	public void mouseDragged(MouseEvent me){
		mouseX=me.getX();
		mouseY=me.getY();
		movX=me.getX();
		movY=me.getY();
		msg="*";
		repaint();
		}
	
	public void mouseMoved(MouseEvent me){
        movX=me.getX();
		movY=me.getY();
		repaint(0,0,100,20);
		}
	
	public void paint(Graphics g){
		g.drawString(msg,mouseX,mouseY);
		g.drawString("Mouse at "+movX+","+movY,10,40);
		}
	}