colormap.java

来自「开源（Open Source）项目JHotDraw的文档和源程序」· Java 代码 · 共 88 行

/*
 * @(#)ColorMap.java 5.2
 *
 */

package CH.ifa.draw.util;

import java.awt.Color;


class ColorEntry {
	public String 	fName;
	public Color 	fColor;

	ColorEntry(String name, Color color) {
	    fColor = color;
	    fName = name;
	}
}

/**
 * A map that is filled with some standard colors. The colors
 * can be looked up by name or index.
 *
 */

public  class ColorMap
        extends Object {

    static ColorEntry fMap[] = {
                new ColorEntry("Black",         Color.black),
                new ColorEntry("Blue",          Color.blue),
                new ColorEntry("Green",         Color.green),
                new ColorEntry("Red",           Color.red),
                new ColorEntry("Pink",          Color.pink),
                new ColorEntry("Magenta",       Color.magenta),
                new ColorEntry("Orange",        Color.orange),
                new ColorEntry("Yellow",        Color.yellow),
                new ColorEntry("New Tan",       new Color(0xEBC79E)),
                new ColorEntry("Aquamarine",    new Color(0x70DB93)),
                new ColorEntry("Sea Green",     new Color(0x238E68)),
                new ColorEntry("Dark Gray",     Color.darkGray),
                new ColorEntry("Light Gray",    Color.lightGray),
                new ColorEntry("White",         Color.white),
                // there is no support for alpha values so we use a special value
                // to represent a transparent color
                new ColorEntry("None",          new Color(0xFFC79E))
    };


	public static int size() {
		return fMap.length;
	}

	public static Color color(int index) {
	    if (index < size() && index >= 0)
	        return fMap[index].fColor;

	    throw new ArrayIndexOutOfBoundsException("Color index: " + index);
	}

    public static Color color(String name) {
        for (int i = 0; i < fMap.length; i++)
            if (fMap[i].fName.equals(name))
                return fMap[i].fColor;

	    return Color.black;
    }

	public static String name(int index) {
	    if (index < size() && index >= 0)
	        return fMap[index].fName;

	    throw new ArrayIndexOutOfBoundsException("Color index: " + index);
	}

	public static int colorIndex(Color color) {
        for (int i=0; i<fMap.length; i++)
            if (fMap[i].fColor.equals(color))
                return i;
        return 0;
    }

	public static boolean isTransparent(Color color) {
        return color.equals(color("None"));
    }
}