// TODO: this "nice buttons" logic is pretty horrific

transient sclass JGallery extends MetaWithChangeListeners is Swingable {

  settableWithVar L<File> files;

  gettable File selectedFile;

  settable bool horizontal = true;

  event adaptingButton(JButton button, File file);

  simplyCached DynamicStack buttons() {

    ret horizontal ? makeNiceButtons() : verticalNiceButtons();

  }

  simplyCached ButtonImageLoader imageLoader() {

    ret new ButtonImageLoader(buttons());

  }

  void setImageFiles(Cl<File> filesCollection) swing {

    var files = asList(filesCollection);

    if (eq(this.files, files)) ret;

    setFiles(files);

    //printVars("JGallery.setImageFiles", n2(files));

    L<TextImageAction> l = filesForNiceButtons(files, lambda1 openImage);

    replaceNiceButtons(buttons(), l);

    for (btn, file : unpair zip(allButtons(buttons()), files))

      adaptingButton(btn, file);

    File selectedFile = selectedFile();

    selectFile(selectedFile);

    imageLoader().update();

  }

  void selectFile(File file) swing {

    selectedFile = file;

    int idx = indexOf(files, file);

    for (int i, JButton btn : unpair iterateWithIndex(allButtons(buttons()))) {

      bool selected = i == idx;

      setSelected(btn, selected);

      if (selected) {

        print("Selected button: " + btn);

        scrollIntoView(btn);

      }

    }

  }

  cachedVisual jHigherScrollPane(jfullcenter(buttons()));

  swappable void openImage(File f) { showImage(f); }

}