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DOS/V Power Report 1998 February
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TickerArea.java
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1997-10-27
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/*
* @(#)TickerArea.java 1.3 96/12/06
*
* Copyright (c) 1994-1996 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.util.StringTokenizer;
/**
* This ImageArea renders a string of text that constantly scrolls across
* the indicated area of the ImageMap in the specified color.
*
* @author Jim Graham
* @version 1.3, 12/06/96
*/
class TickerArea extends ImageMapArea {
String tickertext;
Color tickercolor;
Font tickerfont;
int speed; // In pixels per second for scrolling
int tickerx;
int tickery;
int tickerlen;
long lasttick;
public void handleArg(String s) {
StringTokenizer st = new StringTokenizer(s, ",");
tickertext = st.nextToken();
tickercolor = Color.black;
speed = 100;
String fontname = "TimesRoman";
if (st.hasMoreTokens()) {
fontname = st.nextToken();
if (st.hasMoreTokens()) {
String str = st.nextToken();
if (str.startsWith("#")) {
str = str.substring(1);
}
try {
int colorval = Integer.parseInt(str, 16);
tickercolor = new Color((colorval >> 16) & 0xff,
(colorval >> 8) & 0xff,
(colorval >> 0) & 0xff);
} catch (Exception e) {
tickercolor = Color.black;
}
if (st.hasMoreTokens()) {
str = st.nextToken();
try {
speed = Integer.parseInt(str);
} catch (Exception e) {
speed = 100;
}
}
}
}
FontMetrics fm;
int size;
int nextsize = H;
do {
size = nextsize;
tickerfont = new Font(fontname, Font.PLAIN, size);
fm = parent.getFontMetrics(tickerfont);
nextsize = (size * 9) / 10;
} while (fm.getHeight() > H && size > 0);
tickerlen = fm.stringWidth(tickertext);
tickery = fm.getAscent();
}
public void getMedia() {
tickerx = 0;
repaint();
lasttick = System.currentTimeMillis();
}
public boolean animate() {
long curtick = System.currentTimeMillis();
tickerx -= ((speed * (curtick - lasttick)) / 1000);
if (tickerx > W || tickerx + tickerlen < 0) {
tickerx = W;
}
repaint();
lasttick = curtick;
return true;
}
public void highlight(Graphics g) {
g.setColor(tickercolor);
g.setFont(tickerfont);
g.drawString(tickertext, X+tickerx, Y+tickery);
}
}