Colors.java

package ij.plugin;
import ij.*;
import ij.gui.*;
import ij.process.*;
import ij.io.*;
import ij.plugin.filter.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;

public class Colors implements PlugIn, ItemListener {
    private String[] colors = {"red","green","blue","magenta     ","cyan","yellow","orange","black","white"};
    private Choice fchoice, bchoice, schoice;
    private Color fc2, bc2, sc2;

    public void run(String arg) {
        showDialog();
    }

    void showDialog() {
        Color fc =Toolbar.getForegroundColor();
        String fname = getColorName(fc, "black");
        Color bc =Toolbar.getBackgroundColor();
        String bname = getColorName(bc, "white");
        Color sc =Roi.getColor();
        String sname = getColorName(sc, "yellow");
        GenericDialog gd = new GenericDialog("Colors");
        gd.addChoice("Foreground:", colors, fname);
        gd.addChoice("Background:", colors, bname);
        gd.addChoice("Selection:", colors, sname);
        Vector choices = gd.getChoices();
        fchoice = (Choice)choices.elementAt(0);
        bchoice = (Choice)choices.elementAt(1);
        schoice = (Choice)choices.elementAt(2);
        fchoice.addItemListener(this);
        bchoice.addItemListener(this);
        schoice.addItemListener(this);
        
        gd.showDialog();
        if (gd.wasCanceled()) {
            if (fc2!=fc) Toolbar.setForegroundColor(fc);
            if (bc2!=bc) Toolbar.setBackgroundColor(bc);
            if (sc2!=sc) {
                Roi.setColor(sc);
                ImagePlus imp = IJ.getInstance().getImagePlus();
                if (imp!=null && imp.getRoi()!=null) imp.draw();
            }
            return;
        }
        fname = gd.getNextChoice();
        bname = gd.getNextChoice();
        sname = gd.getNextChoice();
        fc2 = getColor(fname, Color.black);
        bc2 = getColor(bname, Color.white);
        sc2 = getColor(sname, Color.yellow);
        if (fc2!=fc) Toolbar.setForegroundColor(fc2);
        if (bc2!=bc) Toolbar.setBackgroundColor(bc2);
        if (sc2!=sc) {
            Roi.setColor(sc2);
            ImagePlus imp = IJ.getInstance().getImagePlus();
            if (imp!=null) imp.draw();
        }
    }
    
    String getColorName(Color c, String defaultName) {
        String name = defaultName;
        if (c.equals(Color.red)) name = colors[0];
        else if (c.equals(Color.green)) name = colors[1];
        else if (c.equals(Color.blue)) name = colors[2];
        else if (c.equals(Color.magenta)) name = colors[3];
        else if (c.equals(Color.cyan)) name = colors[4];
        else if (c.equals(Color.yellow)) name = colors[5];
        else if (c.equals(Color.orange)) name = colors[6];
        else if (c.equals(Color.black)) name = colors[7];
        else if (c.equals(Color.white)) name = colors[8];
        return name;
    }
    
    Color getColor(String name, Color defaultColor) {
        Color c = defaultColor;
        if (name.equals(colors[0])) c = Color.red;
        else if (name.equals(colors[1])) c = Color.green;
        else if (name.equals(colors[2])) c = Color.blue;
        else if (name.equals(colors[3])) c = Color.magenta;
        else if (name.equals(colors[4])) c = Color.cyan;
        else if (name.equals(colors[5])) c = Color.yellow;
        else if (name.equals(colors[6])) c = Color.orange;
        else if (name.equals(colors[7])) c = Color.black;
        else if (name.equals(colors[8])) c = Color.white;
        return c;
    }

    public void itemStateChanged(ItemEvent e) {
        Choice choice = (Choice)e.getSource();
        String item = choice.getSelectedItem();
        Color color = getColor(item, Color.black);
        if (choice==fchoice)
            Toolbar.setForegroundColor(color);
        else if (choice==bchoice)
            Toolbar.setBackgroundColor(color);
        else if (choice==schoice) {
            Roi.setColor(color);
            ImagePlus imp = IJ.getInstance().getImagePlus();
            if (imp!=null && imp.getRoi()!=null) imp.draw();
        }
    }

}