AnimText
import java.awt.*;
import java.util.StringTokenizer;
/**
Another applet littering my learning curve :-) Loosely based on the NervousText applet
from Sun.
<APPLET CODE="AnimText" WIDTH=600 HEIGHT=400>
<PARAM NAME=text VALUE="Hello">
<PARAM NAME=font VALUE="TimesRoman">
<PARAM NAME=type VALUE=1>
<PARAM NAME=min VALUE=6>
<PARAM NAME=max VALUE=28>
<PARAM NAME=naptime VALUE=100>
<PARAM NAME=align VALUE=left>
</APPLET>
Parameters:
text - the text to display
font - the font to render the text in
style - whether PLAIN, BOLD or ITALIC
step - increments in font size each iteration
type - blink (all chars same rate)
wave ("the wave")
random (random)
align - left, center or right
bgimage - background image URL
bgcolor - background color (as RGB)
fgcolor - foreground color
naptime - time between iterations in millisecs
min - minimum font size
max - maximum font size
@Author: Suresh Srinivasan (suresh@thomtech.com)
@Date: Dec 1995
@Version: 0.1
*/
public class AnimText extends java.applet.Applet implements Runnable {
public static final int TYPE_BLINK = 1;
public static final int TYPE_WAVE = 2;
public static final int TYPE_RANDOM = 3;
public static final int ALIGN_LEFT = 1;
public static final int ALIGN_CENTER = 2;
public static final int ALIGN_RIGHT = 3;
char textChars[]; /* the text to display as a char array */
Thread thread;
int type;
int style;
int defaultMin=8;
int defaultMax=28;
int max;
int min;
int defaultStep = 2;
int step;
int align;
String rgbDelimiter = ":,.";
StringTokenizer st;
Color fgColor;
Color bgColor;
boolean threadSuspended = false;
static final String defaultString = "Welcome to Java!";
String fontString;
Font fonts[];
int current[];
int direction[];
int charWidth[]; /* width of each character in the preferred font */
int charHeight; /* height of character */
boolean resized = false;
boolean readyToPaint = true;
int naptime;
int defaultNaptime = 100;
int Width;
int Height;
int defaultWidth = 300;
int defaultHeight = 100;
int maxWidth = 600;
int maxHeight = 400;
int n;
Image offI;
Graphics offG;
int totalWidth;
int leader = 10; /* leading space */
public void init() {
String s;
Integer intObj;
s = getParameter("text");
if (s == null)
s = defaultString;
textChars = new char[s.length()];
s.getChars(0 , s.length(), textChars, 0);
s = getParameter("font");
if (s == null)
fontString = "TimesRoman";
else if (s.equalsIgnoreCase("TimesRoman"))
fontString = "TimesRoman";
else if (s.equalsIgnoreCase("Courier"))
fontString = "Courier";
else if (s.equalsIgnoreCase("Helvetica"))
fontString = "Helvetica";
else if (s.equalsIgnoreCase("Dialog"))
fontString = "Dialog";
else
fontString = "TimesRoman";
s = getParameter("style");
if (s == null)
style = Font.PLAIN;
else if (s.equalsIgnoreCase("PLAIN"))
style = Font.PLAIN;
else if (s.equalsIgnoreCase("BOLD"))
style = Font.BOLD;
else if (s.equalsIgnoreCase("ITALIC"))
style = Font.ITALIC;
else
style = Font.PLAIN;
s = getParameter("type");
if (s == null)
type = TYPE_WAVE;
else if (s.equalsIgnoreCase("blink"))
type = TYPE_BLINK;
else if (s.equalsIgnoreCase("wave"))
type = TYPE_WAVE;
else if (s.equalsIgnoreCase("random"))
type = TYPE_RANDOM;
else
type = TYPE_WAVE;
s = getParameter("align");
if (s == null)
align = ALIGN_CENTER;
else if (s.equalsIgnoreCase("left"))
align = ALIGN_LEFT;
else if (s.equalsIgnoreCase("center"))
align = ALIGN_CENTER;
else if (s.equalsIgnoreCase("right"))
align = ALIGN_RIGHT;
else
align = ALIGN_CENTER;
try {
intObj = new Integer(getParameter("width"));
Width = intObj.intValue();
} catch (Exception e) {
Width = defaultWidth;
}
try {
intObj = new Integer(getParameter("height"));
Height = intObj.intValue();
} catch (Exception e) {
Height = defaultHeight;
}
try {
intObj = new Integer(getParameter("min"));
min = intObj.intValue();
} catch (Exception e) {
min = defaultMin;
}
try {
intObj = new Integer(getParameter("max"));
max = intObj.intValue();
} catch (Exception e) {
max = defaultMax;
}
if (min >= max || min <= 0) {
min = defaultMin;
max = defaultMax;
}
try {
intObj = new Integer(getParameter("step"));
step = intObj.intValue();
} catch (Exception e) {
step = defaultStep;
}
if (step > (max-min)/2) step = defaultStep;
try {
intObj = new Integer(getParameter("naptime"));
naptime = intObj.intValue();
} catch (Exception e) {
naptime = defaultNaptime;
}
if (naptime <= 0) naptime = defaultNaptime;
s = getParameter("fgColor");
if (s != null) st = new StringTokenizer(s, rgbDelimiter);
if (s == null)
fgColor = Color.black;
else if (s.equalsIgnoreCase("red"))
fgColor = Color.red;
else if (s.equalsIgnoreCase("blue"))
fgColor = Color.blue;
else if (s.equalsIgnoreCase("green"))
fgColor = Color.green;
else if (s.equalsIgnoreCase("yellow"))
fgColor = Color.yellow;
else if (s.equalsIgnoreCase("white"))
fgColor = Color.white;
else if (s.equalsIgnoreCase("orange"))
fgColor = Color.orange;
else if (s.equalsIgnoreCase("cyan"))
fgColor = Color.cyan;
else if (s.equalsIgnoreCase("magenta"))
fgColor = Color.magenta;
else if (st.countTokens() == 3) {
Integer r = new Integer(st.nextToken());
Integer g = new Integer(st.nextToken());
Integer b = new Integer(st.nextToken());
fgColor = new Color(r.intValue(), g.intValue(), b.intValue());
} else
fgColor = Color.black;
s = getParameter("bgColor");
if (s != null) st = new StringTokenizer(s, rgbDelimiter);
if (s == null)
bgColor = Color.lightGray;
else if (s.equalsIgnoreCase("red"))
bgColor = Color.red;
else if (s.equalsIgnoreCase("blue"))
bgColor = Color.blue;
else if (s.equalsIgnoreCase("green"))
bgColor = Color.green;
else if (s.equalsIgnoreCase("yellow"))
bgColor = Color.yellow;
else if (s.equalsIgnoreCase("white"))
bgColor = Color.white;
else if (s.equalsIgnoreCase("orange"))
bgColor = Color.orange;
else if (s.equalsIgnoreCase("cyan"))
bgColor = Color.cyan;
else if (s.equalsIgnoreCase("magenta"))
bgColor = Color.magenta;
else if (st.countTokens() == 3) {
Integer r = new Integer(st.nextToken());
Integer g = new Integer(st.nextToken());
Integer b = new Integer(st.nextToken());
bgColor = new Color(r.intValue(), g.intValue(), b.intValue());
} else
bgColor = Color.lightGray;
/* pre allocate stuff */
n = max-min;
if (n>0) {
fonts = new Font[n];
current = new int[textChars.length];
direction = new int[textChars.length];
charWidth = new int[textChars.length];
}
for (int i=0; i<n; i++) {
fonts[i] = new Font(fontString, style, min+i);
}
for (int i=0; i<textChars.length; i++) {
switch (type) {
case TYPE_BLINK:
current[i] = 0;
direction[i] = 1;
break;
case TYPE_WAVE:
current[i] = (int)(Math.sin((double)i/(double)textChars.length*Math.PI)*(float)(n-1));
direction[i] = 1;
break;
case TYPE_RANDOM:
current[i] = (int)(Math.random()*(float)(n));
direction[i] = 1;
break;
default:
}
if (current[i] >= n-1) direction[i] = -1;
}
/* offscreen graphics context */
try {
offI = createImage(maxWidth, maxHeight);
offG = offI.getGraphics();
} catch (Exception e) {
offG = null;
}
}
public void start() {
if (thread == null) {
thread = new Thread(this);
thread.start();
}
}
public void run() {
while ((n>0) && (thread != null)) {
repaint();
try { Thread.sleep(naptime); } catch (Exception e) { }
readyToPaint = false;
next();
readyToPaint = true;
}
}
/* next iteration */
public void next() {
for (int i=0; i<textChars.length; i++) {
current[i] += step*direction[i];
if (current[i] >= n-1) {
current[i] = 2*n-2-current[i];
direction[i] = -1;
}
if (current[i] <= 0) {
current[i] = Math.abs(current[i]);
direction[i] = 1;
}
}
}
/* override the update method to reduce flashing */
public void update(Graphics g) {
if (readyToPaint)
paint(g);
}
public void paint(Graphics g) {
if (offG != null) {
paintApplet(offG);
g.drawImage(offI, 0, 0, this);
} else {
paintApplet(g);
}
}
public void paintApplet(Graphics g) {
if (!resized) {
totalWidth = 0;
g.setFont(fonts[n-1]); /* biggest font */
for (int i=0; i<textChars.length; i++) {
charWidth[i] = g.getFontMetrics().charWidth(textChars[i]);
totalWidth += charWidth[i];
}
if (totalWidth>maxWidth) totalWidth = maxWidth;
charHeight = g.getFontMetrics().getHeight();
if (charHeight>maxHeight) charHeight = maxHeight;
resize(Width, Height);
resized = true;
}
int pos = 0;
switch (align) {
case ALIGN_LEFT:
pos = leader; break;
case ALIGN_CENTER:
pos = (size().width-totalWidth)/2; break;
case ALIGN_RIGHT:
pos = (size().width-totalWidth-leader); break;
default:
}
g.setColor(bgColor);
g.fillRect(0, 0, size().width-1, size().height-1);
g.setColor(fgColor);
for(int i=0; i<textChars.length; i++) {
g.setFont(fonts[current[i]]);
g.drawChars(textChars, i, 1, pos, (size().height+charHeight)/2);
pos += charWidth[i];
}
}
public void stop() {
thread = null;
}
public boolean mouseDown(Event e, int x, int y) {
if (threadSuspended)
thread.resume();
else
thread.suspend();
threadSuspended = !threadSuspended;
return true;
}
}
Back to the AnimText applet
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