Исходный текст аплета LineDraw

Исходный текст аплета LieDrnaw вы найдете в листинге 1.

Листинг 1. Файл LieDrnaw.java

import java.applet.*;

import java.awt.*;

import java.util.*;



public class LineDraw extends Applet

{

  Dimension dmDown;

  Dimension dmUp;

  Dimension dmPrev;

  boolean bDrawing;

  Vector lines;

  public String getAppletInfo()

  {

    return "Name: LineDraw";

  }

  public void init()

  {

    bDrawing = false;

    lines = new Vector();

  }

  public void paint(Graphics g)

  {

    Dimension dimAppWndDimension = getSize();

    setBackground(Color.yellow);

    g.setColor(Color.black);

    g.drawRect(0, 0, 

      dimAppWndDimension.width  - 1, 

      dimAppWndDimension.height - 1);    

    for (int i=0; i < lines.size(); i++) 

    {

      Rectangle p = 

        (Rectangle)lines.elementAt(i);

      g.drawLine(p.width, p.height,

        p.x, p.y);

      g.drawString("<" + p.width 

        + "," + p.height + ">", 

        p.width, p.height);

      g.drawString("<" + p.x + "," +

        p.y+ ">", p.x, p.y);

    }

    bDrawing = false;

  }

  public boolean mouseDown(Event evt, 

    int x, int y)

  {

    if(evt.clickCount > 1)

    {

      lines.removeAllElements();

      repaint();

      return true;

    }

    dmDown = new Dimension(x, y);

    dmPrev = new Dimension(x, y);

    bDrawing = false;

    return true;

  }

  public boolean mouseUp(Event evt, 

    int x, int y)

  {

    if(bDrawing)

    {

      dmUp = new Dimension(x, y);

      lines.addElement(

        new Rectangle(dmDown.width, 

        dmDown.height, x, y));

      repaint();

      bDrawing = false;

    }

    return true;

  }

  public boolean mouseDrag(Event evt, 

    int x, int y)

  {

    Graphics g = getGraphics();

    bDrawing = true;

    g.setColor(Color.yellow);

    g.drawLine(dmDown.width, dmDown.height, 

      dmPrev.width, dmPrev.height);

    g.setColor(Color.black);

    g.drawLine(dmDown.width, 

      dmDown.height, x, y);

    dmPrev = new Dimension(x, y);

    return true;

  }

  public boolean mouseMove(Event evt, 

    int x, int y)

  {

    bDrawing = false;

    return true;

  }

}

Исходный текст документа HTML, подготовленного системой JavaWorkshop, представлен в листинге 2.

Листинг 2. Файл LineDraw.tmp.html

<applet name="LineDraw"

  code="LineDraw" 

  codebase=

"file:/e:/Sun/Articles/vol5/src/LineDraw"

  width="500"

  height="600"

  align="Top"

  alt="If you had a java-enabled browser, 

you would see an applet here.">

</applet>