/******************************************************************************
 * 星空ウォッチング（プラネタリウム）                                         *
 *      by「菊池さん」 <http://kikuchisan.net/>                               *
 *      Copyright(C) 2001 Kikuchi-san's workshop. All rights reserved.        *
 *****************************************************************************/
import java.applet.Applet;
import java.awt.*;
import java.util.*;
import java.awt.event.*;

public class SkyWatching extends Applet implements SkyData {
  SkyStatus status;       //ステータスパネル
  SkyControls controls;   //コントロールパネル
  SkyCanvas canvas;       //描画キャンパス

  public void init() {
    //背景・描画色とレイアウト設定
    setBackground(new Color(0,0,192));
    setForeground(new Color(0,0,0));
    setLayout(new BorderLayout());

    canvas = new SkyCanvas();
    add("Center", canvas);
    add("North", status = new SkyStatus(canvas));
    add("South", controls = new SkyControls(canvas));
  }

  public void destroy() {
    remove(status);
    remove(controls);
    remove(canvas);
  }
  public void start() {
    status.setEnabled(true);
    controls.setEnabled(true);
  }
  public void stop() {
    status.setEnabled(false);
    controls.setEnabled(false);
  }
  public void processEvent(AWTEvent evt) {
    if (evt.getID() == Event.WINDOW_DESTROY) { System.exit(0); }
  }

  public static void main(String args[]) {
    Frame f = new Frame("SkyWatching");
    SkyWatching skyWatching = new SkyWatching();

    skyWatching.init();
    skyWatching.start();

    f.add("Center", skyWatching);
    f.show();
  }
  public String getAppletInfo() {
    return "星空ウォッチング（プラネタリウム）\nby「菊池さん」 <http://kikuchisan.net/>";
  }
}	//end of SkyWatching

// 描画キャンパス
class SkyCanvas extends Canvas {
  SkyData data;	//観測地、星データ
  //日付取得
  Calendar now = Calendar.getInstance();
  int year = now.get(Calendar.YEAR);
  int mon  = now.get(Calendar.MONTH)+1;
  int day  = now.get(Calendar.DAY_OF_MONTH);
  int hour = now.get(Calendar.HOUR_OF_DAY);
  int min  = now.get(Calendar.MINUTE);
  String datenow = year+"/"+mon+"/"+day;
  String hournow = hour+":"+min;
  //初期値設定
  int R       = 600;	//天球の半径
  int offsetX = 10;	//横両サイドのりしろ
  int offsetY = 20;	//縦両サイドのりしろ
  int msize   = 12;	//表示文字のサイズ(px)
  int cityNo  = 0;	//観測地No
  String LNG  = data.lng[0];	//観測地経度
  String LAT  = data.lat[0];	//観測地緯度
  String DATE = datenow;	//日付
  String HOUR = hournow;	//時刻
  String EW   = "E";	//東・西経
  String NS   = "N";	//北・南緯
  String direction[] = {"西","北","東"};	//方角バー
  //判定フラグ
  boolean bool_All   = false;	//再描画
  boolean bool_Star  = false;	//星名表示
  boolean bool_Seiza = false;	//星座表示

  //描画部品定義
  public void paintSky(Graphics g) {	//半天球
    g.setColor(Color.black);
    g.fillArc(offsetX,offsetY,R,R,0,180);
  }
  public void paintStar(Graphics g) {	//星
    g.setColor(Color.yellow);
    for (int i = 0; i < data.X.length; i++)
      g.fillOval(data.X[i],data.Y[i],data.SM[i],data.SM[i]);
  }
  public void paintStarName(Graphics g) {	//星名
    g.setColor(Color.lightGray);
    for (int i = 0; i < data.X.length; i++)
      g.drawString(data.star_name[i],data.X[i],data.Y[i]-4);
  }
  public void paintSeiza(Graphics g) {	//星座
    g.setColor(Color.blue);
    for (int i = 0; i < data.X.length-1; i++)
      g.drawLine(data.X[i],data.Y[i],data.X[i+1],data.Y[i+1]);
    g.setColor(Color.pink);
    for (int i = 0; i < data.seiza_name.length; i++)
      g.drawString(data.seiza_name[i],(data.X[i]+data.X[i+1])/2,(data.Y[i]+data.Y[i+1])/2);
  }
  public void paintBar(Graphics g) {	//方角バー
    g.setColor(new Color(230,230,230));
    g.fillRoundRect(offsetX,R/2+offsetY,R,msize,10,5);
    g.setColor(Color.red);
    g.drawString(direction[0],offsetX,R/2+offsetY+msize-2);
    g.drawString(direction[1],R/2+offsetX-msize/2,R/2+offsetY+msize-2);
    g.drawString(direction[2],R+offsetX-msize,R/2+offsetY+msize-2);
  }
  //描画
  public void paint(Graphics g) {
    setSize(R+offsetX*2,R/2+offsetY*2+msize);	//サイズ設定
    g.setColor(Color.white);
    g.drawString(DATE,20,20);
    g.drawString(HOUR,80,20);
    g.drawString("観測地　"+data.city[cityNo],20,32);
    g.drawString(EW+" "+LNG,20,44);
    g.drawString(NS+" "+LAT,90,44);
    paintSky(g);
    if (bool_Seiza) paintSeiza(g);
    paintStar(g);
    if (bool_Star)  paintStarName(g);
    paintBar(g);
  }
  //再描画
  public void redraw(boolean bool_All) {
    this.bool_All = bool_All;
    repaint();
  }
}	//end of SkyCanvas

// ステータスパネル
class SkyStatus extends Panel implements ActionListener, ItemListener {
  SkyData data;	//観測地、星データ
  SkyCanvas canvas;	//描画キャンパス
  Choice choice_Direction  = new Choice();
  Choice choice_City       = new Choice();
  Choice choice_Sign_lng   = new Choice();
  Choice choice_Sign_lat   = new Choice();
  Button button_help       = new Button("ヘルプ");
  Button button_redraw     = new Button("再描画");
  TextField textfield_lng;
  TextField textfield_lat;
  TextField textfield_date;
  TextField textfield_hour;

  public SkyStatus(SkyCanvas canvas) {
    this.canvas = canvas;
    //テキストフィールド初期値セット
    textfield_lng  = new TextField(canvas.LNG,10);
    textfield_lat  = new TextField(canvas.LAT,10);
    textfield_date = new TextField(canvas.DATE,10);
    textfield_hour = new TextField(canvas.HOUR,10);
    //ステータスパネル作成
    setLayout(new GridLayout(2,1));
    setBackground(new Color(192,192,192));
    //上段
    add(new Label("方角:",Label.RIGHT));
    choice_Direction.addItem("北");
    choice_Direction.addItem("南");
    choice_Direction.addItem("東");
    choice_Direction.addItem("西");
    add(choice_Direction); choice_Direction.addItemListener(this);

    add(new Label("経度:",Label.RIGHT));
    choice_Sign_lng.addItem("E");
    choice_Sign_lng.addItem("W");
    add(choice_Sign_lng);  choice_Sign_lng.addItemListener(this);
    add(textfield_lng);

    add(new Label("日付:",Label.RIGHT));
    add(textfield_date);

    add(button_help);      button_help.addActionListener(this);
    //下段
    add(new Label("観測地:",Label.RIGHT));
    for (int i = 0; i < data.city.length; i++) choice_City.addItem(data.city[i]);
    add(choice_City);      choice_City.addItemListener(this);

    add(new Label("緯度:",Label.RIGHT));
    choice_Sign_lat.addItem("N");
    choice_Sign_lat.addItem("S");
    add(choice_Sign_lat);  choice_Sign_lat.addItemListener(this);
    add(textfield_lat);

    add(new Label("時刻:",Label.RIGHT));
    add(textfield_hour);

    add(button_redraw);    button_redraw.addActionListener(this);
  }
  //ボタンイベント
  public void actionPerformed(ActionEvent evt) {
    String arg = evt.getActionCommand();	//ボタン文字列
    canvas.LNG  = textfield_lng.getText().trim();
    canvas.LAT  = textfield_lat.getText().trim();
    canvas.DATE = textfield_date.getText().trim();
    canvas.HOUR = textfield_hour.getText().trim();
    canvas.redraw(arg.equals("再描画"));
  }	//end of actionPerformed
  //ポップアップメニューイベント
  public void itemStateChanged(ItemEvent evt) {
    Object src = evt.getSource();
    String arg = (String)evt.getItem();
    if (src == choice_Direction) {
      if (arg == "北") {
        canvas.direction[0]="西"; canvas.direction[1]="北"; canvas.direction[2]="東";
      } else if (arg == "南"){
        canvas.direction[0]="東"; canvas.direction[1]="南"; canvas.direction[2]="西";
      } else if (arg == "東"){
        canvas.direction[0]="北"; canvas.direction[1]="東"; canvas.direction[2]="南";
      } else if (arg == "西"){
        canvas.direction[0]="南"; canvas.direction[1]="西"; canvas.direction[2]="北";
      }
    }
    if (src == choice_City) {
      for (int i = 0; i < data.city.length; i++) {
        if (arg == data.city[i]) {
          textfield_lng.setText(data.lng[i]);
          textfield_lat.setText(data.lat[i]);
          canvas.cityNo = i;
          break;
        }
      }
    }
    if (src == choice_Sign_lng) {
      if (arg == "E")      { canvas.EW="E"; }
      else if (arg == "W") { canvas.EW="W"; }
    }
    if (src == choice_Sign_lat) {
      if (arg == "N")      { canvas.NS="N"; }
      else if (arg == "S") { canvas.NS="S"; }
    }
  }	//end of itemStateChanged
}	//end of SkyStatus

// コントロールパネル
class SkyControls extends Panel implements ActionListener, ItemListener {
  SkyCanvas canvas;	//描画キャンパス
  Button button_Motion  = new Button("日周運動開始");
  Choice choice_Motion  = new Choice();
  Button button_Star    = new Button("星名表示");
  Button button_Seiza   = new Button("星座表示");
  Button button_trace   = new Button("航跡表示");
  Button button_Zoomin  = new Button("＋");
  Button button_Zoomout = new Button("−");

  public SkyControls(SkyCanvas canvas) {
    this.canvas = canvas;
    //コントロールパネル作成
    setBackground(new Color(0,192,192));
    add(button_Motion);     button_Motion.addActionListener(this);
    add(new Label("速度:",Label.RIGHT));
    for (int i = 1; i < 10; i++) choice_Motion.addItem(String.valueOf(i));
    add(choice_Motion);     choice_Motion.addItemListener(this);
    add(button_Star); button_Star.addActionListener(this);
    add(button_Seiza); button_Seiza.addActionListener(this);
    add(button_trace);      button_trace.addActionListener(this);

    add(new Label("ｽﾞｰﾑ:",Label.RIGHT));
    add(button_Zoomin);  button_Zoomin.addActionListener(this);
    add(button_Zoomout); button_Zoomout.addActionListener(this);
  }
  //ボタンイベント
  public void actionPerformed(ActionEvent evt) {
    Object src = evt.getSource();	//イベント種類
    String arg = evt.getActionCommand();	//イベント文字列
    if (src == button_Motion) {
      if (arg.equals("日周運動開始")) {
        button_Motion.setLabel("日周運動停止");
        System.out.println("日周運動開始 pressed!");
      }
      if (arg.equals("日周運動停止")) {
        button_Motion.setLabel("日周運動開始");
        System.out.println("日周運動停止 pressed!");
      }
    }
    if (src == button_Star) {
      if (arg.equals("星名表示")) {
        button_Star.setLabel("星名消去");
        canvas.bool_Star = true;
        canvas.repaint();
      }
      if (arg.equals("星名消去")) {
        button_Star.setLabel("星名表示");
        canvas.bool_Star = false;
        canvas.repaint();
      }
    }
    if (src == button_Seiza) {
      if (arg.equals("星座表示")) {
        canvas.bool_Seiza = true;
        button_Seiza.setLabel("星座消去");
        canvas.repaint();
      }
      if (arg.equals("星座消去")) {
        button_Seiza.setLabel("星座表示");
        canvas.bool_Seiza = false;
        canvas.repaint();
      }
    }
    if (src == button_trace) {
      if (arg.equals("航跡表示")) {
        button_trace.setLabel("航跡消去");
        System.out.println("航跡表示 pressed!");
      }
      if (arg.equals("航跡消去")) {
        button_trace.setLabel("航跡表示");
        System.out.println("航跡消去 pressed!");
      }
    }
    if (src == button_Zoomin) {
        System.out.println("＋ pressed!");
    }
    if (src == button_Zoomout) {
        System.out.println("− pressed!");
    }
  }	//end of actionPerformed
  //ポップアップメニューイベント
  public void itemStateChanged(ItemEvent evt) {
    Object src = evt.getSource();
    String arg = (String)evt.getItem();
    if (src == choice_Motion) {
        System.out.println("速度 "+arg+" selected!");
    }
  }	//end of itemStateChanged
}	//end of SkyControls