/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* -Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* -Redistribution in binary form must reproduct the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
* OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF 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.
*
* You acknowledge that Software is not designed, licensed or intended for
* use in the design, construction, operation or maintenance of any nuclear
* facility.
*/
/*
* @(#)ButtonFilter.java 1.12 03/01/23
*/
import java.applet.Applet;
import java.awt.Image;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.util.StringTokenizer;
import java.util.Vector;
import java.util.Hashtable;
import java.net.URL;
import java.awt.image.*;
import java.net.MalformedURLException;
/**
* An extensible ImageMap applet class.
* The active areas on the image are controlled by ImageArea classes
* that can be dynamically loaded over the net.
*
* @author Jim Graham
* @version 1.12, 01/23/03
*/
class ButtonFilter extends RGBImageFilter {
boolean pressed;
int defpercent;
int border;
int width;
int height;
ColorModel models[] = new ColorModel[7];
ColorModel origbuttonmodel;
public ButtonFilter(boolean press, int p, int b, int w, int h) {
pressed = press;
defpercent = p;
border = b;
width = w;
height = h;
}
public void setHints(int hints) {
super.setHints(hints & (~ImageConsumer.COMPLETESCANLINES));
}
public void setColorModel(ColorModel model) {
if (model instanceof IndexColorModel && true) {
IndexColorModel icm = (IndexColorModel) model;
models[0] = filterIndexColorModel(icm, false, false, 0);
models[1] = filterIndexColorModel(icm, true, !pressed, defpercent);
models[2] = null;
if (pressed) {
models[3] = filterIndexColorModel(icm, true, false,
defpercent/2);
} else {
models[3] = models[0];
}
models[4] = null;
models[5] = filterIndexColorModel(icm, true, pressed, defpercent);
models[6] = models[0];
origbuttonmodel = model;
consumer.setColorModel(models[3]);
} else {
super.setColorModel(model);
}
}
public IndexColorModel filterIndexColorModel(IndexColorModel icm,
boolean opaque,
boolean brighter,
int percent) {
byte r[] = new byte[256];
byte g[] = new byte[256];
byte b[] = new byte[256];
byte a[] = new byte[256];
int mapsize = icm.getMapSize();
icm.getReds(r);
icm.getGreens(g);
icm.getBlues(b);
if (opaque) {
icm.getAlphas(a);
for (int i = 0; i < mapsize; i++) {
int rgb = filterRGB(icm.getRGB(i), brighter, percent);
a[i] = (byte) (rgb >> 24);
r[i] = (byte) (rgb >> 16);
g[i] = (byte) (rgb >> 8);
b[i] = (byte) (rgb >> 0);
}
}
return new IndexColorModel(icm.getPixelSize(), mapsize, r, g, b, a);
}
/**
* Define the ranges of varying highlight for the button.
* ranges is an array of 8 values which split up a scanline into
* 7 different regions of highlighting effect:
*
* ranges[0-1] = area outside of left edge of button
* ranges[1-2] = area inside UpperLeft highlight region left of center
* ranges[2-3] = area requiring custom highlighting left of center
* ranges[3-4] = area inside center of button
* ranges[4-5] = area requiring custom highlighting right of center
* ranges[5-6] = area inside LowerRight highlight region right of center
* ranges[6-7] = area outside of right edge of button
* ranges[8-9] = y coordinates for which these ranges apply
*
* Note that ranges[0-1] and ranges[6-7] are empty where the edges of
* the button touch the left and right edges of the image (everywhere
* on a square button) and ranges[2-3] and ranges[4-5] are only nonempty
* in those regions where the UpperLeft highlighting has leaked over
* the "top" of the button onto parts of its right edge or where the
* LowerRight highlighting has leaked under the "bottom" of the button
* onto parts of its left edge (can't happen on square buttons, happens
* occasionally on round buttons).
*/
public void buttonRanges(int y, int ranges[]) {
ranges[0] = ranges[1] = 0;
if (y < border) {
ranges[2] = ranges[3] = ranges[4] = ranges[5] = width - y;
ranges[8] = ranges[9] = y;
} else if (y > height - border) {
ranges[2] = ranges[3] = ranges[4] = ranges[5] = height - y;
ranges[8] = ranges[9] = y;
} else {
ranges[2] = ranges[3] = border;
ranges[4] = ranges[5] = width - border;
ranges[8] = border;
ranges[9] = height - border;
}
ranges[6] = ranges[7] = width;
}
private int savedranges[];
protected int[] getRanges(int y) {
int ranges[] = savedranges;
if (ranges == null) {
ranges = savedranges = new int[10];
ranges[8] = ranges[9] = -1;
}
if (y < ranges[8] || y > ranges[9]) {
buttonRanges(y, ranges);
}
return ranges;
}
public void setPixels(int x, int y, int w, int h,
ColorModel model, byte pixels[], int off,
int scansize) {
if (model == origbuttonmodel) {
int ranges[] = getRanges(y);
int x2 = x + w;
int y2 = y + h;
for (int cy = y; cy < y2; cy++) {
if (cy < ranges[8] || cy > ranges[9]) {
buttonRanges(cy, ranges);
}
for (int i = 0; i < 7; i++) {
if (x2 > ranges[i] && x < ranges[i+1]) {
int cx1 = Math.max(x, ranges[i]);
int cx2 = Math.min(x2, ranges[i+1]);
if (models[i] == null) {
super.setPixels(cx1, cy, cx2 - cx1, 1,
model, pixels,
off + (cx1 - x), scansize);
} else {
if (cx1 < cx2) {
consumer.setPixels(cx1, cy, cx2 - cx1, 1,
models[i], pixels,
off + (cx1 - x), scansize);
}
}
}
}
off += scansize;
}
} else {
super.setPixels(x, y, w, h, model, pixels, off, scansize);
}
}
public int filterRGB(int x, int y, int rgb) {
boolean brighter;
int percent;
if ((x < border && y < height - x) || (y < border && x < width - y)) {
brighter = !pressed;
percent = defpercent;
} else if (x >= width - border || y >= height - border) {
brighter = pressed;
percent = defpercent;
} else if (pressed) {
brighter = false;
percent = defpercent / 2;
} else {
return rgb & 0x00ffffff;
}
return filterRGB(rgb, brighter, percent);
}
public int filterRGB(int rgb, boolean brighter, int percent) {
int r = (rgb >> 16) & 0xff;
int g = (rgb >> 8) & 0xff;
int b = (rgb >> 0) & 0xff;
if (brighter) {
r = (255 - ((255 - r) * (100 - percent) / 100));
g = (255 - ((255 - g) * (100 - percent) / 100));
b = (255 - ((255 - b) * (100 - percent) / 100));
} else {
r = (r * (100 - percent) / 100);
g = (g * (100 - percent) / 100);
b = (b * (100 - percent) / 100);
}
return (rgb & 0xff000000) | (r << 16) | (g << 8) | (b << 0);
}
public String getAppletInfo() {
return "Title: ButtonFilter \nAuthor: Jim Graham \nAn extensible ImageMap applet class. The active areas on the image are controlled by ImageArea classes that can be dynamically loaded over the net.";
}
}
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