package com.wang.gui;

import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Iterator;

//鼠标监听事件
public class TestMouseListener {
    public static void main(String[] args) {
        new MyFrame2("画图");
    }
}

//自己的类
class MyFrame2 extends Frame {
    //画画需要画笔，需要监听鼠标当前的位置，需要集合
    ArrayList points = null;

    public MyFrame2(String title) {
        super(title);

        setBounds(200, 200, 400, 300);

        //存鼠标点击的点
        points = new ArrayList<>();

        this.addMouseListener(new MyMouseListener());
        setVisible(true);
    }

    @Override
    public void paint(Graphics g) {
        //画画，监听鼠标的事件
        Iterator iterator = points.iterator();
        while (iterator.hasNext()) {
            Point point = (Point) iterator.next();
            g.setColor(Color.BLUE);
            g.fillOval(point.x, point.y,10,10);
        }
    }

    //添加一个点到界面上
    private void addPaint(Point point){
        points.add(point);
    }

    //适配器模式
    private class MyMouseListener extends MouseAdapter {
        //鼠标 按下，弹起，按住不放

        @Override
        public void mousePressed(MouseEvent e) {
            MyFrame2 frame = (MyFrame2) e.getSource();
            //这个我们点击的时候，就会在界面上产生一个点！画
            //这个点就是鼠标的点；
            frame.addPaint(new Point(e.getX(), e.getY()));

            //每次点击鼠标都需要重新画一遍
            frame.repaint();//刷新
        }
    }
}