private void addControls() {
    // Blinn-Phong tab
    VerticalFlowPanel blinnPhongSettings = new VerticalFlowPanel();
    blinnPhongSettings.setBorder(new TitledBorder("Shader Settings"));
    blinnPhongSettings.add(shininess.getSliderControls(false));
    blinnPhongControls.add(blinnPhongSettings.getPanel());
    ev.controlFrame.add(blinnPhongTabName, blinnPhongControls.getPanel());

    // Checkerboard tab
    VerticalFlowPanel checkerboardSettings = new VerticalFlowPanel();
    checkerboardSettings.setBorder(new TitledBorder("Shader Settings"));
    VerticalFlowPanel color1Panel = new VerticalFlowPanel();
    color1Panel.setBorder(new TitledBorder("Colour 1"));
    color1Panel.add(col1R.getSliderControls(false));
    color1Panel.add(col1G.getSliderControls(false));
    color1Panel.add(col1B.getSliderControls(false));
    checkerboardSettings.add(color1Panel.getPanel());
    VerticalFlowPanel color2Panel = new VerticalFlowPanel();
    color2Panel.setBorder(new TitledBorder("Colour 2"));
    color2Panel.add(col2R.getSliderControls(false));
    color2Panel.add(col2G.getSliderControls(false));
    color2Panel.add(col2B.getSliderControls(false));
    checkerboardSettings.add(color2Panel.getPanel());
    checkerboardSettings.add(frequency.getSliderControls(false));
    checkerboardSettings.add(useIntFrequency.getControls());
    checkerboardSettings.add(useAveraging.getControls());
    checkerboardSettings.add(useSmoothStep.getControls());
    checkerboardControls.add(checkerboardSettings.getPanel());
    ev.controlFrame.add(checkerboardTabName, checkerboardControls.getPanel());

    // Woodcut tab
    VerticalFlowPanel woodcutSettings = new VerticalFlowPanel();
    woodcutSettings.setBorder(new TitledBorder("Shader Settings"));
    woodcutSettings.add(time.getSliderControls(false));
    woodcutControls.add(woodcutSettings.getPanel());
    ev.controlFrame.add(woodcutTabName, woodcutControls.getPanel());

    // Toon tab
    VerticalFlowPanel toonSettings = new VerticalFlowPanel();
    toonSettings.setBorder(new TitledBorder("Shader Settings"));
    toonSettings.add(thresholdHigh.getSliderControls(false));
    toonSettings.add(thresholdMedium.getSliderControls(false));
    toonSettings.add(thresholdLow.getSliderControls(false));
    toonControls.add(toonSettings.getPanel());
    ev.controlFrame.add(toonTabName, toonControls.getPanel());
  }