private void updateMemDisplay() {
   if (product != null) {
     long storageMem = product.getRawStorageSize(productSubsetDef);
     double factor = 1.0 / (1024 * 1024);
     double megas = MathUtils.round(factor * storageMem, 10);
     if (megas > memWarnLimit) {
       memLabel.setForeground(MEM_LABEL_WARN_COLOR);
     } else {
       memLabel.setForeground(MEM_LABEL_NORM_COLOR);
     }
     memLabel.setText(MEM_LABEL_TEXT + megas + "M");
   } else {
     memLabel.setText(" ");
   }
 }
    private void updateUIState(ParamChangeEvent event) {
      if (updatingUI.compareAndSet(false, true)) {
        try {
          if (event != null && canUseGeoCoordinates(product)) {
            final String parmName = event.getParameter().getName();
            if (parmName.startsWith("geo_")) {
              final GeoPos geoPos1 =
                  new GeoPos((Float) paramNorthLat1.getValue(), (Float) paramWestLon1.getValue());
              final GeoPos geoPos2 =
                  new GeoPos((Float) paramSouthLat2.getValue(), (Float) paramEastLon2.getValue());
              updateXYParams(geoPos1, geoPos2);
            } else if (parmName.startsWith("source_x") || parmName.startsWith("source_y")) {
              syncLatLonWithXYParams();
            }
          }
          int x1 = ((Number) paramX1.getValue()).intValue();
          int y1 = ((Number) paramY1.getValue()).intValue();
          int x2 = ((Number) paramX2.getValue()).intValue();
          int y2 = ((Number) paramY2.getValue()).intValue();

          int sx = ((Number) paramSX.getValue()).intValue();
          int sy = ((Number) paramSY.getValue()).intValue();

          updateSubsetDefRegion(x1, y1, x2, y2, sx, sy);

          Dimension s =
              productSubsetDef.getSceneRasterSize(
                  product.getSceneRasterWidth(), product.getSceneRasterHeight());
          subsetWidthLabel.setText(String.valueOf(s.getWidth()));
          subsetHeightLabel.setText(String.valueOf(s.getHeight()));

          int sliderBoxX1 = x1 / thumbNailSubSampling;
          int sliderBoxY1 = y1 / thumbNailSubSampling;
          int sliderBoxX2 = x2 / thumbNailSubSampling;
          int sliderBoxY2 = y2 / thumbNailSubSampling;
          int sliderBoxW = sliderBoxX2 - sliderBoxX1 + 1;
          int sliderBoxH = sliderBoxY2 - sliderBoxY1 + 1;
          Rectangle box =
              getScaledRectangle(new Rectangle(sliderBoxX1, sliderBoxY1, sliderBoxW, sliderBoxH));
          imageCanvas.setSliderBoxBounds(box);
        } finally {
          updatingUI.set(false);
        }
      }
    }