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sclass G22ShapeCollectorPanel > MetaWithChangeListeners is Swingable {
  settable G22Utils g22utils;
  settable bool qoiAlways;
  settableWithVar S imageSourceDesc = "Left screen half";
  
  AnalyzedImage completedImage;
  
  new MouseInComponentMonitor mouseMonitor;
  PicturesByMD5 pics;
  new JMaxSpeedAnimation anim;
  JCheckBox cbOn = jcheckbox("On", true);
  JCheckBox cbFreezeOnHover = jcheckbox("Freeze on hover", true);
  JSpinner colorsSpinner = jListSpinner(dropFirst(firstNCubes(16)));
  JSpinner blurSpinner = jSpinner(0, 0, 99);
  JLabel lblStats = rightAlignedLabel();
  
  class AnalyzedImage {
    new G22DataWrangler wrangler;
    
    BufferedImage inputImage() {
      ret wrangler.inputImage;
    }

    simplyCached byte[] qoiData() {
      ret g22utils.timeFunction("QOI compress",
        -> toQOI(inputImage()));
    }
  
    simplyCached S qoiMD5() {
      ret md5(qoiData());
    }

    S saveImage() {
      pics.put(qoiMD5(), qoiData());
      ret qoiMD5();
    }
  }
  
  void init {
    if (pics != null) ret;
    pics = new PicturesByMD5(g22utils.projectFile("Images"));
    pics.extension(".qoi");
    
    looselyBindLiveValueToCheckBox(g22utils.liveProjectVar("Freeze on hover"), cbFreezeOnHover);
    looselyBindLiveValueToSpinner(g22utils.liveProjectVar("colors"), colorsSpinner);
    looselyBindLiveValueToSpinner(g22utils.liveProjectVar("blur"), blurSpinner);
  }
  
  swappable BufferedImage nextInputImage() {
    ret shootLeftScreenHalf();
  }
  
  selfType imageSource(IF0<BufferedImage> imageSource, S imageSourceDesc default str(imageSource)) {
    nextInputImage = imageSource;
    imageSourceDesc = imageSourceDesc;
    this;
  }
  
  BufferedImage nextFrame() {
    if (!isChecked(cbOn)
      || isChecked(cbFreezeOnHover) && mouseMonitor!) {
      sleepSeconds(0.1);
      null;
    }

    var inputImage = nextInputImage();
    new AnalyzedImage ai;

    var wrangler = ai.wrangler;
    wrangler.timings(g22utils.functionTimings());
    wrangler.inputImage(inputImage);
    wrangler.colors(intFromSpinner(colorsSpinner));
    wrangler.blur(intFromSpinner(blurSpinner));

    wrangler.stepUntilStage(wrangler.regionsStage);
    g22utils.setTransientProjectVar("Last wrangler", wrangler);
    
    L qoiInfo = !qoiAlways ? null : ll(
      "QOI: " + str_toK(l(ai.qoiData())),
      "Hash: " + takeFirst(3, ai.qoiMD5()),
      "Saved: " + yesNo_short(pics.has(ai.qoiMD5())));
    
    setText(lblStats, commaCombine(
      anim.fps(),
      nRegions(wrangler.regions),
      qoiInfo,
      nImages(pics.imageCount()) + " saved",
      n2(countConcepts(g22utils.concepts(), G22PointOfInterest), "POI")
    );
  
    completedImage = ai;
    ret toBufferedImage(wrangler.posterizedImage);
  }
  
  cachedVisualize {
    init();
    
    anim.renderFrame(l0 nextFrame);

    mouseMonitor.init(anim.imageSurface());
    
    // UI main layout

    ret northAndCenterWithMargins(
      vstackWithSpacing(
        withLabel("Watch:", liveValueLabel(varImageSourceDesc())),
        jCenteredSection(" Visual Controls ", 
          jHigherScrollPane_borderless_center(
            jcenteredline(
              cbOn, cbFreezeOnHover,
              jCenteredSection("Colors", colorsSpinner),
              jCenteredSection("Blur", blurSpinner)
          )
        ))),
      centerAndSouthWithMargin(
        jCenteredSection(" What I See ", anim),
        centerAndEastWithMargin(lblStats,
          jThreadedButton("Save image", -> {
            completedImage?.saveImage();
          })))
    );
  }
  
  ImageSurface imageSurface() {
    ret anim.imageSurface();
  }
}