//
//	Pakuman(パックマン)    2001/11/03    by ONOZATO Takehisa
//
//	<applet code="Pakuman.class" width=660 height=200 ></applet>
//

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class Pakuman extends Applet implements ActionListener{

	Image ofs; Graphics grf;			//オフスクリーン
	int ofsWidth=660; int ofsHeight=200;
	Color ofsBG=new Color(255,239,223);

	Button btn[]=new Button[6];			//ボタン
	int btnLeft[]={30,30,380,420,460,520};
	int btnTop[]={30,50,40,40,40,40};
	String btnCaption[]={"＋２","−２","戻る","停止","進む","クリア"};
	String btnCommand[]={"0","1","2","3","4","5"};

	int originX=330; int originY=130;		//原点
	int unit=15;					//単位長当たりのピクセル数
	String scale[]={"-20","-10"," 0"," 10"," 20"};	//目盛

	boolean flg;					//移動中
	int v;						//速度
	int t; int dt;					//時刻，増分
	int x;						//座標

    public void init(){

	ofs=createImage(ofsWidth,ofsHeight);		//オフスクリーン
	grf=ofs.getGraphics();
	setBackground(ofsBG);
	Font fnt=grf.getFont();				//フォント
	String fname=fnt.getName();
	int fstyle=fnt.getStyle();
	grf.setFont(new Font(fname,fstyle,16));		//16pt

	for(int i=0; i<btn.length; i++){
	    btn[i]=new Button(btnCaption[i]);		//ボタンのセット
	    btn[i].addActionListener(this); 
	    btn[i].setActionCommand(btnCommand[i]);
	    add(btn[i]);
	}
	v=2; t=0; dt=1; x=v*t; flg=false;		//初期設定
    }

    public void update(Graphics g) {
	paint(g);
    }

    public void paint(Graphics g){
	if(Math.abs(t+dt)>10){flg=false;}
	if(flg){
	    t=t+dt; x=v*t;
	    DrawOfs(); g.drawImage(ofs, 0, 0, this);
	    shortSleep();
	    repaint();
	}else{
	    DrawOfs(); g.drawImage(ofs, 0, 0, this);
	}
    }

/*** しばらく休む ***/
    public void shortSleep(){
	try{
	    Thread.sleep(500);		//ミリ秒
	}
	catch(Exception e){}
    }

/*** ボタンのイベントプロシージャ ***/
    public void actionPerformed(ActionEvent e){
	int c=Integer.parseInt(e.getActionCommand());
	switch(c){
	    case 0: v=2; t=0; x=v*t; flg=false; break;
	    case 1: v=-2; t=0; x=v*t; flg=false; break;
	    case 2: dt=-1; if(t>-10){flg=true;}; break;
	    case 3: flg=false; break;
	    case 4: dt=1; if(t<10){flg=true;}; break;
	    case 5: t=0; x=v*t; flg=false; break;
	}
	repaint();
    }

/*** オフスクリーンへの描画 ***/
    void DrawOfs(){

	grf.setColor(ofsBG);					//背景
	grf.fillRect(0,0,ofsWidth,ofsHeight);
	for(int i=0; i<btn.length; i++){
	    btn[i].setBounds(btnLeft[i],btnTop[i],40,20);	//ボタン
	}
	grf.setColor(Color.lightGray);				//目盛
	for(double a=-20; a<=20; a=a+2){
	    grf.drawLine(picX(a),picY(-2),picX(a),picY(2));
	}
	grf.setColor(Color.gray);
	for(int i=0; i<5; i++){
	    double a=10*(double)(i-2);
	    grf.drawLine(picX(a),picY(-2),picX(a),picY(2));
	    grf.drawString(scale[i],picX(a)-10,picY(-2)+20);
	}
	grf.setColor(Color.black);				//表示
	    grf.drawString("速度",110,50);
	    grf.drawString("時刻",170,50);
	    grf.drawString("位置",230,50);
	    grf.drawString(""+v,120,70);
	    grf.drawString(""+t,180,70);
	    grf.drawString(""+x,240,70);

	grf.setColor(new Color(194,144,144));			//時計
	    grf.fillOval(300,20,60,60);
	grf.setColor(Color.white);
	    grf.drawLine(330,20,330,25);
	    double t1=Math.PI*(double)(90-15*t)/180;
	    int x1=330+(int)(22*Math.cos(t1));
	    int y1=50-(int)(22*Math.sin(t1));
	    grf.drawLine(330,50,x1,y1);
	    grf.fillOval(326,46,8,8);
	
	grf.setColor(new Color(255,192,0));			//パックマン
	if(v>0){
	    grf.fillArc(picX(x)-15,picY(0)-15,30,30,30,300);	//餌
	    grf.setColor(Color.red);
	    if(x<20){
		for(double a=x+2; a<=20; a=a+2){
		    grf.fillOval(picX(a)-5,picY(0)-5,10,10);
		}
	    }
	}else{
	    grf.fillArc(picX(x)-15,picY(0)-15,30,30,210,300);
	    grf.setColor(Color.red);
	    if(x>-20){
		for(double a=x-2; a>=-20; a=a-2){
		    grf.fillOval(picX(a)-5,picY(0)-5,10,10);
		}
	    }
	}
    }

/*** 座標の換算 ***/
    int picX(double x){
	int xx=originX+(int)(x*unit); return xx;
    }
    int picY(double y){
	int yy=originY-(int)(y*unit); return yy;
    }
}