colorModelButton.setToolTipText(getColorModelDescription( model.getColorModel()));
    void setColorModel()    {        boolean gs = (model.getColorModel().equals(ImViewer.GREY_SCALE_MODEL));        Iterator i = channelButtons.iterator();        ChannelButton button;        while (i.hasNext()) {            button = (ChannelButton) i.next();            button.setSelected(                    model.isChannelActive(button.getChannelIndex()));            button.setGrayedOut(gs);        }        colorModelButton.setIcon(getColorModelIcon(model.getColorModel()));    }