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!7

cmodule PieceDatabase {
  S piece = "white king";
  bool lightSquares;
  
  transient Map<Bool, LPairS> map = new Map;
  transient SingleComponentPanel scp;
  transient ImageSurface is;
  transient JLabel lblCount;
  transient ReliableSingleThread rst = dm_rst(module(), r update);
  
  start-thread {
    for (bool lightSquares : ll(false, true))
      map.put(lightSquares, chessPieceImagesFromAGIBlue(lightSquares));
    rst.trigger();
  }
  
  void update {
    if (map == null || is == null) ret;
    scp.setComponent(centerAndSouthWithMargin(jScroll_center(is), lblCount));
    L<BufferedImage> images = map.get(lightSquares).get(replaceObject(piece, "empty square", "empty"));
    is.setImage(mergeBufferedImagesHorizontally(images));
    setText(lblCount, nImages(images));
  }
  
  visualize {
    is = jImageSurface();
    lblCount = jCenteredLabel();
    ret withComputing(rst, northAndCenterWithMargins(
      jline(
        withLabel("Show images for:", main.onChange(rst, dm_comboBox piece(replace(ai_chessPieces(), "empty", "empty square")))),
        dm_checkBox("Light squares", 'lightSquares)),
      scp = singleComponentPanel(jCenteredLabel("Loading..."))));
  }
}