/*
* ColorGenerator.java
*
* Copyright (c) 1995-2012, The University of Sheffield. See the file
* COPYRIGHT.txt in the software or at http://gate.ac.uk/gate/COPYRIGHT.txt
*
* This file is part of GATE (see http://gate.ac.uk/), and is free
* software, licenced under the GNU Library General Public License,
* Version 2, June 1991 (in the distribution as file licence.html,
* and also available at http://gate.ac.uk/gate/licence.html).
*
* Valentin Tablan, 11/07/2000
*
* $Id: ColorGenerator.java 17873 2014-04-18 11:14:43Z markagreenwood $
*/
package gate.swing;
import java.awt.Color;
import java.util.LinkedList;
/**
* This class is used to generate random colours that are evenly distributed in
* the colours space.
*
*/
public class ColorGenerator {
/**
* Creates a new ColorGenerator
*
*/
public ColorGenerator() {
for(int i = 0; i < 8; i++)availableSpacesList[i] = new LinkedList<ColorSpace>();
ColorSpace usedCS = new ColorSpace(0,0,0,255);
availableSpacesList[0].addLast(new ColorSpace(usedCS.baseR +
usedCS.radius/2,
usedCS.baseG,
usedCS.baseB,
usedCS.radius/2));
availableSpacesList[1].addLast(new ColorSpace(usedCS.baseR,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB,
usedCS.radius/2));
availableSpacesList[2].addLast(new ColorSpace(usedCS.baseR +
usedCS.radius/2,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB,
usedCS.radius/2));
availableSpacesList[3].addLast(new ColorSpace(usedCS.baseR,
usedCS.baseG,
usedCS.baseB + usedCS.radius/2,
usedCS.radius/2));
availableSpacesList[4].addLast(new ColorSpace(usedCS.baseR +
usedCS.radius/2,
usedCS.baseG,
usedCS.baseB + usedCS.radius/2,
usedCS.radius/2));
availableSpacesList[5].addLast(new ColorSpace(usedCS.baseR,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB + usedCS.radius/2,
usedCS.radius/2));
/*
availableSpacesList[6].addLast(new ColorSpace(usedCS.baseR +
usedCS.radius/2,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB + usedCS.radius/2,
usedCS.radius/2));
*/
// Color foo = getNextColor();
}
/**
* Gets the next random colour
*
*/
public Color getNextColor(){
ColorSpace usedCS;
listToRead = listToRead % 8;
if(availableSpacesList[listToRead].isEmpty()){
usedCS = usedSpacesList.removeFirst();
availableSpacesList[listToRead].addLast(new ColorSpace(usedCS.baseR,
usedCS.baseG,
usedCS.baseB,
usedCS.radius/2));
availableSpacesList[listToRead].addLast(new ColorSpace(
usedCS.baseR + usedCS.radius/2,
usedCS.baseG,
usedCS.baseB,
usedCS.radius/2));
availableSpacesList[listToRead].addLast(new ColorSpace(usedCS.baseR,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB,
usedCS.radius/2));
availableSpacesList[listToRead].addLast(new ColorSpace(
usedCS.baseR + usedCS.radius/2,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB,
usedCS.radius/2));
availableSpacesList[listToRead].addLast(new ColorSpace(usedCS.baseR,
usedCS.baseG,
usedCS.baseB + usedCS.radius/2,
usedCS.radius/2));
availableSpacesList[listToRead].addLast(new ColorSpace(
usedCS.baseR + usedCS.radius/2,
usedCS.baseG,
usedCS.baseB + usedCS.radius/2,
usedCS.radius/2));
availableSpacesList[listToRead].addLast(new ColorSpace(usedCS.baseR,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB + usedCS.radius/2,
usedCS.radius/2));
availableSpacesList[listToRead].addLast(new ColorSpace(
usedCS.baseR + usedCS.radius/2,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB + usedCS.radius/2,
usedCS.radius/2));
}
usedCS = availableSpacesList[listToRead].removeFirst();
Color res = new Color(usedCS.baseR + usedCS.radius/2,
usedCS.baseG + usedCS.radius/2,
usedCS.baseB + usedCS.radius/2);
usedSpacesList.addLast(usedCS);
listToRead++;
res = res.brighter();
return res;
}
/**
* Represents a colur space. A colour space is a cube in a tridimiensional
* space (where the axes represent red/green/blue values) defined by a point
* and a radius(the length of the edge).
*/
class ColorSpace{
/**
* Creates a new ColorSpace
*
* @param r
* @param g
* @param b
* @param radius
*/
ColorSpace(int r, int g, int b, int radius){
baseR = r;
baseG = g;
baseB = b;
this.radius = radius;
}
/** *
*/
int baseR, baseG, baseB;
/** */
int radius;
}
/** */
@SuppressWarnings({"unchecked","rawtypes"})
LinkedList<ColorSpace>[] availableSpacesList = new LinkedList[8];
/** */
LinkedList<ColorSpace> usedSpacesList = new LinkedList<ColorSpace>();
/** */
int listToRead = 0;
} // ColorGenerator
