/*
    unitCircleDemo - demo the unitCircle class
    Display the screen, just like Rubber.class, and allow user to
    click and drag to define the area of a new unit circle...then
    instanciate that bad boy, and so we get a screen full of unit circles.

 */

import java.awt.*;
import java.applet.*;
import java.util.*;

public class unitCircleThread extends Applet {
    unitCircle uc;

    Vector ucList = new Vector();

    Label xy = new Label();
    TextField ta = new TextField();
    Label prompt = new Label();

    boolean drawing = false;
    int newX, newY, newWidth, newHeight = 0;
    int startX,startY = 0;


    public boolean mouseMove(Event evt, int x, int y){
        xy.setText("Mouse at: "+x+", "+y);
        xy.reshape(5,5,150,15);
        return true;
    }

    public boolean mouseDown(Event evt, int x, int y){
        System.out.println("mouse down id="+evt.id);
        drawing=true;
        newX=x;
        newY=y;
        startX = newX;
        startY = newY;

        return true;
    }

    public boolean mouseDrag(Event evt, int x, int y){
        newX=startX;
        newY=startY;

        newWidth=x-newX;
        newHeight=y-newY;
        xy.setText("Mouse at: "+x+", "+y);

        //allow the initial point to be any corner of the rubber banded rectangle
        if (newWidth < 0){
            newX += newWidth;
            newWidth=Math.abs(newWidth);
        }

        if (newHeight < 0){
            newY += newHeight;
            newHeight=Math.abs(newHeight);
        }

        repaint();
        return true;
    }

    public boolean mouseUp(Event evt, int x, int y){
        newX=startX;
        newY=startY;

        newWidth=x-newX;
        newHeight=y-newY;
        xy.setText("Mouse at: "+x+", "+y);

        //allow the initial point to be any corner of the rubber banded rectangle
        if (newWidth < 0){
            newX += newWidth;
            newWidth=Math.abs(newWidth);
        }

        if (newHeight < 0){
            newY += newHeight;
            newHeight=Math.abs(newHeight);
        }

        int k = Integer.parseInt(ta.getText());
        addUnitCircle(newX,newY,newWidth,newHeight,k);

        drawing=false;
        repaint();
        return true;
    }

    public void addUnitCircle(int x, int y, int width, int height, int delay){
        unitCircle uc = new unitCircle(x,y,width,height, delay);
        add(uc);
        uc.start();
       // uc.reshape(x,y,width,height);
        ucList.addElement(uc);

    }


    public void paint(Graphics g){
        g.setColor(Color.black);
        if (drawing){
            g.setColor(Color.blue);
            g.drawRect(newX,newY,newWidth,newHeight);
        }

        //draw ucList

        /*This is no longer needed-because the components are now
          properly added, and are drawing themselves in relationship
          to their own personal sense of zero.

        g.setColor(Color.black);
        Enumeration e = ucList.elements();
        while (e.hasMoreElements()){
            unitCircle uc = (unitCircle) e.nextElement();
            uc.paint(g);
        }
        */

    } //paint

    public void init() {
        super.init();
        add(xy);                //adds Label xy to this container.
        setLayout(null);        //don't use an existing layout manager
        resize(500,300);        //resize the applet window
        xy.reshape(5,5,150,15); //resize the xy label

        setBackground(Color.lightGray);
        add(ta);
        ta.reshape(175,20,100,20);
        ta.setText("500");

        add(prompt);
        prompt.setText("Circle delay (milliseconds): ");
        prompt.reshape(5,20,150,20);

        //add some unit Circles
        addUnitCircle(5,50,100,100,15);
        addUnitCircle(160,50,100,100,125);
        addUnitCircle(5,160,100,100,250);
        addUnitCircle(160,160,100,100,500);

    } //init


}