Ticker Tape

/*
Ticker Tape 1.0

Copyright (c) 2000 By Goodwin Software

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 or the Licenses, or (at your
option) any later version.

This program is distrubuted in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABLITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
675 Mass Ave, Cambridge, MA 02139, USA.

For any questions or comments regarding this program, please e-mail
us a support@goodwinsoftware.com.
*/

import java.awt.*;
import java.applet.*;
import java.awt.image.*;

public class TickerTape extends Applet implements Runnable {
  Image winScratch;
  Graphics gScratch;
  Thread runner;
  String tickerline, displaystring;
  Color outerborder = new Color(0xCCCCCC);
  Color middleborder = new Color(0x000000);
  Color innerborder = new Color(0xCCCCCC);
  Color textcolor = new Color(0x00FF00);
  Color textbackground = new Color(0x000000);
  boolean isRunning = false;
  int fmh, mchars, delay = 200, cnt;
  FontMetrics fm;

  public void init() {
    int i;
    String s;

    Font f = new Font("Helvetica", Font.PLAIN, 12);
    fm = getFontMetrics(f);
    fmh = fm.getHeight();
    mchars = getSize().width - 26;
    winScratch = createImage(getSize().width, getSize().height);
    gScratch = winScratch.getGraphics();
    setBackground(Color.white);
    s = getParameter("delay");
    if (s != null)
      delay = Integer.parseInt(s);
    s = getParameter("outborder");
    if (s != null)
      outerborder = new Color(Integer.parseInt(s, 16));
    s = getParameter("middleborder");
    if (s != null)
      middleborder = new Color(Integer.parseInt(s, 16));
    s = getParameter("innerborder");
    if (s != null)
      innerborder = new Color(Integer.parseInt(s, 16));
    s = getParameter("textcolor");
    if (s != null)
      textcolor = new Color(Integer.parseInt(s, 16));
    s = getParameter("textbackground");
    if (s != null)
      textbackground = new Color(Integer.parseInt(s, 16));
    tickerline = getParameter("tickerline");
    displaystring = tickerline.substring(0, 1);
    cnt = 1;
  }

  public void start() {
    if (runner == null) {
      runner = new Thread(this);
      runner.start();
    }
  }

  public void stop() {
    runner = null;
  }

  public void run() {
    Thread thisThread = Thread.currentThread();

    while (runner == thisThread) {
      repaint();
      if (isRunning) {
        if (cnt == tickerline.length())
          displaystring += " ";
        else {
          displaystring += tickerline.substring(cnt, cnt + 1);
          cnt++;
        }
      }
      isRunning = true;
      try {
          Thread.sleep(delay);
      } catch(InterruptedException e) {}
    }
  }

  public void paint(Graphics g) {
    int w, h, i;
    String s;

    w = getSize().width;
    h = getSize().height;
    Font f = new Font("Helvetica", Font.PLAIN, 12);
    gScratch.setColor(outerborder);
    gScratch.drawRect(0, 0, w - 1, h - 1);
    gScratch.drawRect(1, 1, w - 3, h - 3);
    gScratch.setColor(middleborder);
    gScratch.drawRect(2, 2, w - 5, h - 5);
    gScratch.drawRect(3, 3, w - 7, h - 7);
    gScratch.setColor(innerborder);
    gScratch.drawRect(4, 4, w - 9, h - 9);
    gScratch.drawRect(5, 5, w - 11, h - 11);
    gScratch.setColor(textbackground);
    gScratch.fillRect(6, 6, w - 12, h - 12);
    gScratch.setFont(f);
    gScratch.setColor(textcolor);
    while (fm.stringWidth(displaystring) > getSize().width - 26)
      displaystring = displaystring.substring(1, displaystring.length());
    gScratch.drawString(displaystring, getSize().width - 13 - fm.stringWidth(displaystring), fmh + 8);
    g.drawImage(winScratch, 0, 0, this);
    s = displaystring.trim();
    if (s.equals("")) {
        displaystring = "";
        cnt = 0;
    }
  }

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

}

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