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- // $Header: z:/admin/metro_examples/java/demo/ImageMap/rcs/RoundButtonFilter.java 1.1 1997/02/06 00:30:11 IPGIntel-2 Exp $
- /*
- * @(#)RoundButtonFilter.java 1.6 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.
- */
-
- /**
- * 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 1.6, 12/06/96
- */
- class RoundButtonFilter extends ButtonFilter {
- int Xcenter;
- int Ycenter;
- int Yradsq;
- int innerW;
- int innerH;
- int Yrad2sq;
-
- public RoundButtonFilter(boolean press, int p, int b, int w, int h) {
- super(press, p, b, w, h);
- Xcenter = w/2;
- Ycenter = h/2;
- Yradsq = h * h / 4;
- innerW = w - border * 2;
- innerH = h - border * 2;
- Yrad2sq = innerH * innerH / 4;
- }
-
- public boolean inside(int x, int y) {
- int yrel = Math.abs(Ycenter - y);
- int xrel = (int) (Math.sqrt(Yradsq - yrel * yrel) * width / height);
- return (x >= Xcenter - xrel && x < Xcenter + xrel);
- }
-
- public void buttonRanges(int y, int ranges[]) {
- int yrel = Math.abs(Ycenter - y);
- int xrel = (int) (Math.sqrt(Yradsq - yrel * yrel) * width / height);
- ranges[0] = 0;
- ranges[1] = Xcenter - xrel;
- ranges[6] = Xcenter + xrel;
- ranges[7] = width;
- ranges[8] = ranges[9] = y;
- if (y < border) {
- ranges[2] = ranges[3] = ranges[4] = Xcenter;
- ranges[5] = ranges[6];
- } else if (y + border >= height) {
- ranges[2] = ranges[1];
- ranges[3] = ranges[4] = ranges[5] = Xcenter;
- } else {
- int xrel2 = (int) (Math.sqrt(Yrad2sq - yrel * yrel)
- * innerW / innerH);
- ranges[3] = Xcenter - xrel2;
- ranges[4] = Xcenter + xrel2;
- if (y < Ycenter) {
- ranges[2] = ranges[3];
- ranges[5] = ranges[6];
- } else {
- ranges[2] = ranges[1];
- ranges[5] = ranges[4];
- }
- }
- }
-
- public int filterRGB(int x, int y, int rgb) {
- boolean brighter;
- int percent;
- int i;
- int xrel, yrel;
- int ranges[] = getRanges(y);
- for (i = 0; i < 7; i++) {
- if (x >= ranges[i] && x < ranges[i+1]) {
- break;
- }
- }
- switch (i) {
- default:
- case 0:
- case 6:
- return rgb & 0x00ffffff;
- case 1:
- brighter = !pressed;
- percent = defpercent;
- break;
- case 5:
- brighter = pressed;
- percent = defpercent;
- break;
- case 2:
- yrel = y - Ycenter;
- xrel = Xcenter - x;
- percent = (int) (yrel * defpercent * 2 /
- Math.sqrt(yrel * yrel + xrel * xrel))
- - defpercent;
- if (!pressed) {
- percent = -percent;
- }
- if (percent == 0) {
- return rgb;
- } else if (percent < 0) {
- percent = -percent;
- brighter = false;
- } else {
- brighter = true;
- }
- break;
- case 4:
- yrel = Ycenter - y;
- xrel = x - Xcenter;
- percent = (int) (yrel * defpercent * 2 /
- Math.sqrt(yrel * yrel + xrel * xrel))
- - defpercent;
- if (pressed) {
- percent = -percent;
- }
- if (percent == 0) {
- return rgb;
- } else if (percent < 0) {
- percent = -percent;
- brighter = false;
- } else {
- brighter = true;
- }
- break;
- case 3:
- if (!pressed) {
- return rgb & 0x00ffffff;
- }
- brighter = false;
- percent = defpercent;
- break;
- }
- return filterRGB(rgb, brighter, percent);
- }
- }
-