sclass FormLayout1 extends AbstractLayoutManager {
  public void layoutContainer(Container parent) {
    L<Component> l = getComponents(parent);
    
    new BitSet bigOnes;
    for i over l:
      if (containsATextArea(l.get(i))) add(bigOnes, i);
      
    int nBigOnes = bigOnes.cardinality();
    int mandatoryHeight = totalPreferredHeight(listWithoutIndicesInBitSet(l, bigOnes));
    int gap = 4, outerSpacing = 5;
    Dimension size = parent.getSize();
    int gapsAndMargins = outerSpacing*2+(l(l)-1)*gap;
    int totalSpace = size.height-gapsAndMargins;
    int liberalSpace = totalSpace-mandatoryHeight;
    double perBigOne = doubleRatio(liberalSpace, nBigOnes);
    printVars ifdef FormLayout1_debug(height := size.height, +gapsAndMargins, +totalSpace, +liberalSpace, +nBigOnes, +perBigOne);
    double y = outerSpacing;
    for i over l: {
      Component c = l.get(i);
      bool big = contains(bigOnes, i);
      double h = big ? perBigOne : c.getPreferredSize().height;
      int actualY = iround(y);
      c.setBounds(outerSpacing, actualY, size.width-outerSpacing*2, iround(y+h)-actualY);
      printVars ifdef FormLayout1_debug(+i, +big, cBounds := c.getBounds());
      y += h+gap;
    }
    printVars ifdef FormLayout1_debug(+y);

    // set preferred size
    Dimension pref = componentsBoundingSize(parent, outerSpacing);
    if (parent.getHeight() <= 0) { // pre-showing - maybe we should always do this
      int tph = totalPreferredHeight(l);
      pref.height = tph+gapsAndMargins;
    }
    preferredSize(pref);
  }
}

Began life as a copy of #1014730