package mouseex;

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

public class Applet1 extends Applet {
  private boolean isStandalone = false;
  Point mpos=new Point(0,0);
  int numPoint=0;
  boolean newLine=false;
  Point line[]=new Point[20];
  boolean editMode=false;
  int numSelected=-1;

  private Label label1 = new Label();
  private Label xlabel = new Label();
  private Label label3 = new Label();
  private Label ylabel = new Label();
  private Label label2 = new Label();
  private Label eventlabel = new Label();

  private Button Newbutton = new Button();
  private Button editbutton = new Button();
  //引数値の取得
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //アプレットのビルド
  public Applet1() {
  }
  //アプレットの初期化
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //コンポーネントの初期化
  private void jbInit() throws Exception {
    label1.setText("x=");
    label1.setBounds(new Rectangle(188, 272, 29, 17));
    this.setLayout(null);
    xlabel.setText("0");
    xlabel.setBounds(new Rectangle(230, 273, 37, 17));
    label3.setText("y=");
    label3.setBounds(new Rectangle(281, 270, 28, 18));
    ylabel.setText("0");
    ylabel.setBounds(new Rectangle(316, 270, 49, 19));

    this.addMouseListener(new java.awt.event.MouseAdapter() {
      public void mousePressed(MouseEvent e) {
        this_mousePressed(e);
      }
      public void mouseReleased(MouseEvent e) {
        this_mouseReleased(e);
      }
    });

    label2.setText("event");
    label2.setBounds(new Rectangle(23, 269, 44, 21));
    eventlabel.setBounds(new Rectangle(68, 271, 97, 17));
    this.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
      public void mouseDragged(MouseEvent e) {
        this_mouseDragged(e);
      }
    });

    Newbutton.setLabel("new");
    Newbutton.setBounds(new Rectangle(45, 240, 69, 22));
    Newbutton.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        Newbutton_actionPerformed(e);
      }
    });

    editbutton.setLabel("Edit");
    editbutton.setBounds(new Rectangle(149, 239, 62, 23));
    editbutton.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        editbutton_actionPerformed(e);
      }
    });

    this.add(label3, null);
    this.add(ylabel, null);
    this.add(label2, null);
    this.add(eventlabel, null);
    this.add(xlabel, null);
    this.add(label1, null);
    this.add(Newbutton, null);
    this.add(editbutton, null);
  }
  //アプレットの情報取得
  public String getAppletInfo() {
    return "アプレット情報";
  }
  //引数情報の取得
  public String[][] getParameterInfo() {
    return null;
  }

  public void paint(Graphics g){
    //draw mpos
    g.drawRect(mpos.x-2,mpos.y-2,5,5);
    //draw line[]
    int i=0;
    if(numPoint >=1){
      if(0==numSelected) g.setColor(new Color(200,100,100));
      g.fillRect(line[0].x-2,line[0].y-2,5,5);
      g.setColor(new Color(0,0,0));
      for(i=1;i<numPoint;i++){
        if(i==numSelected) g.setColor(new Color(200,100,100));
        g.fillRect(line[i].x-2,line[i].y-2,5,5);
        g.setColor(new Color(0,0,0));
        g.drawLine(line[i-1].x,line[i-1].y,line[i].x,line[i].y);
      }
    }
  }

  void this_mousePressed(MouseEvent e) {
    mpos=e.getPoint();
    eventlabel.setText("mousePressed");
    xlabel.setText(Integer.toString(mpos.x));
    ylabel.setText(Integer.toString(mpos.y));
    if(newLine) {
      if(e.getClickCount()==2) {
        newLine=false;
        Newbutton.setEnabled(true);
        editbutton.setEnabled(true);
        editbutton.setLabel("edit off");
      }
      else{
        line[numPoint]=mpos;
        if(numPoint <line.length-2 ) numPoint++;
      }
    }
    if(editMode){
      //serch point
      numSelected=-1;
      for(int i=0;i<numPoint;i++){
        if(dist(line[i],mpos)<5) {
          numSelected=i;
          break;
        }
      }
    }
    //System.out.println("mouseCount:"+e.getClickCount()+"num:"+numPoint);
    repaint();
  }

 double dist(Point p1,Point p2){
   return Math.sqrt((p1.x-p2.x)*(p1.x-p2.x)+(p1.y-p2.y)*(p1.y-p2.y));
 }

  void this_mouseDragged(MouseEvent e) {
    mpos=e.getPoint();
    eventlabel.setText("mouseDragged");
    xlabel.setText(Integer.toString(mpos.x));
    ylabel.setText(Integer.toString(mpos.y));
    if(numSelected >= 0) {
      line[numSelected].x=mpos.x;
      line[numSelected].y=mpos.y;
    }
    repaint();
  }

  void this_mouseReleased(MouseEvent e) {
    eventlabel.setText("mouseReleased");
    xlabel.setText(Integer.toString(mpos.x));
    ylabel.setText(Integer.toString(mpos.y));
    //editMode=false;
    numSelected=-1;
    repaint();
  }

  void Newbutton_actionPerformed(ActionEvent e) {
    numPoint=0;
    newLine=true;
    editMode=false;
    editbutton.setEnabled(false);
    Newbutton.setEnabled(false);
    repaint();
  }

  void editbutton_actionPerformed(ActionEvent e) {
    if(!editMode) {
      editMode=true;
      editbutton.setLabel("edit On");
    }
    else{
      editMode=false;
      editbutton.setLabel("edit off");
    }
  }
}