if (source == view.getSliderT())
if (source == view.sliderT)
    public void stateChanged(ChangeEvent e)    {        GraphicSlider source = (GraphicSlider) e.getSource();        if (source == view.getSliderT())             handleSliderTStateChanged((ChangeEventSlider) e);        else handleSliderZStateChanged((ChangeEventSlider) e);    }