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!7

cmodule ImageSegmenter > DynImageSurface {
  // parameters
  int blur;
  bool distanceFromColor;
  int dc_r, dc_g, dc_b;
  float contrastThreshold = 0.5f;
  int gridSize = 2;
  DoubleRange widthRange = new(0, 1);
  DoubleRange heightRange = new(0, 1);
  DoubleRange xRange = new(0, 1);
  DoubleRange yRange = new(0, 1);
  
  // output
  L<Rect> segments;
  
  transient JLabel lblFound; 
  transient ReliableSingleThread rst = dm_rst(this, r segmentIt);
  
  visualize {
    JSlider slider = main.onChange(jLiveValueSlider(dm_fieldLiveValue('contrastThreshold)), rst);
    JSpinner spinner = main.onChange(spinner, dm_spinner gridSize(2, 10), rst);
    JSpinner blurSpinner = main.onChange(dm_spinner blur(0, 10), rst);
    
    JComponent sup = super.visualize();
    overlaySelectionsOnImageSurface(imageSurface, segments);

    ret withCenteredLinesBelow(sup,
      ll(jsection("Preprocessing", jline(
        withLabel("Blur:", blurSpinner),
        dm_checkBox("Distance from color:", 'distanceFromColor),
        withLabel("R:", main.onChange(dm_spinner dc_r(0, 255), rst)),
        withLabel("G:", main.onChange(dm_spinner dc_g(0, 255), rst)),
        withLabel("B:", main.onChange(dm_spinner dc_b(0, 255), rst))))),
      ll(
        withLabel("Contrast Threshold:", slider),
        withLabel("Grid size:", spinner),
        jbutton("Segment", rst),
        withLabel("Segments found:", lblFound = jlabel(l_str(segments))),
        jPopDownButton_noText(
          "Show segments", rThread showSegments
        )),
      ll(
        withLabel("Width range:", main.onChange(doubleRangeLiveValueSlider(dm_fieldLiveValue('widthRange)), rst)),
        withLabel("Height range:", main.onChange(doubleRangeLiveValueSlider(dm_fieldLiveValue('heightRange)), rst))),
      ll(
        withLabel("X position:", main.onChange(doubleRangeLiveValueSlider(dm_fieldLiveValue('xRange)), rst)),
        withLabel("Y position:", main.onChange(doubleRangeLiveValueSlider(dm_fieldLiveValue('yRange)), rst))));
  }
  
  start {
    if (!hasImage()) setImage(whiteImage(100, 100));
    dm_vmBus_onMessage('newClipboardContents, voidfunc(O o) {
      if (o cast BufferedImage) thread { setImage(o); rst.trigger(); }
    });
  }
  
  void segmentIt enter {
    if (!hasImage()) ret;
    int w = imageWidth(), h = imageHeight();
    
    BufferedImage image = getImage();
    if (blur == 0)
      imageSurface.imageToDraw = null;
    else
      image = imageSurface.imageToDraw = new BoxBlurFilter(blur).filter(image, null);
    
    new AutoSegmenter as;
    as.g = gridSize;
    as.contrastThreshold = contrastThreshold;
    BWImage bw;
    if (distanceFromColor)
      image = img_distanceFromColor(image, rgbFromInt(dc_r, dc_g, dc_b));
    else
      bw = BWImage(image);
    L<Rect> segments = as.go();
    IntRange wr = doubleToIntRange_endPlus1(w, widthRange);
    IntRange hr = doubleToIntRange_endPlus1(h, heightRange);
    IntRange xr = doubleToIntRange_endPlus1(w, xRange);
    IntRange yr = doubleToIntRange_endPlus1(h, yRange);
    printVars_str(+wr, +hr, +xr, +yr);
    segments = filterRectsByWidthRange(segments, wr);
    segments = filterRectsByHeightRange(segments, hr);
    segments = filterRectsByCenterXRange(segments, xr);
    segments = filterRectsByCenterYRange(segments, yr);
    setField(+segments);
    setText(lblFound, l_str(segments));
    overlaySelectionsOnImageSurface(imageSurface, segments);
  }
  
  void showSegments {
    L<Rect> segments = this.segments;
    showImage(n2(segments, "segment") + " found",
      mergeBufferedImagesVertically(map(segments, r -> clipBufferedImage(getImage(), r))));
  }
}