Method setup

ij/src/main/java/ij/plugin/LUT_Editor.java:120–141

(ImagePlus imp)

     }
     
     public void setup(ImagePlus imp) {
        if (imp==null) {
           IJ.noImage();
           return;
        }
        this.imp  =  imp;
        bitDepth = imp.getBitDepth();
        ImageProcessor ip = imp.getChannelProcessor();
        IndexColorModel cm = (IndexColorModel)ip.getColorModel();
        origin = cm;
        mapSize = cm.getMapSize();
        reds = new byte[256];
        greens = new byte[256];
        blues = new byte[256];
        cm.getReds(reds);
        cm.getGreens(greens);
        cm.getBlues(blues);
        addMouseListener(this);
        addMouseMotionListener(this);
        for(int index  = 0; index < mapSize; index++)
            c[index] = new Color(reds[index]&255, greens[index]&255, blues[index]&255);
    }
    
    public Dimension getPreferredSize()  {
        return new Dimension(columns*entryWidth, rows*entryHeight);