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Java Source | 1996-04-26 | 3.6 KB | 128 lines |
- /*
- * @(#)TickerArea.java 1.2 96/04/24
- *
- * Copyright (c) 1994-1996 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
- * without fee is hereby granted.
- * Please refer to the file http://java.sun.com/copy_trademarks.html
- * for further important copyright and trademark information and to
- * http://java.sun.com/licensing.html for further important licensing
- * information for the Java (tm) Technology.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- *
- * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
- * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
- * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
- * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
- * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
- * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
- * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES"). SUN
- * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
- * HIGH RISK ACTIVITIES.
- */
-
- 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 1.2, 04/24/96
- */
- 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);
- }
- }
-
-