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Java Source | 1997-07-30 | 3.9 KB | 128 lines |
- // $Header: z:/admin/metro_examples/java/demo/ImageMap/rcs/TickerArea.java 1.1 1997/02/06 00:30:17 IPGIntel-2 Exp $
- /*
- * @(#)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);
- }
- }
-
-