@Override
    protected void onImpl() {
      float proportion = myPreviousProportion > 0 ? myPreviousProportion : getSplitterInitialProportion();
      int firstSize = mySplitter.isVertical() ? mySplitter.getFirstComponent().getHeight() : mySplitter.getFirstComponent().getWidth();
      // !! order is important! first fix
      mySplitter.fixFirst();
      myListener.on((int)((1 - proportion) * firstSize / proportion));
      mySplitter.setSecondComponent(myDetailsComponent.getPanel());
      mySplitter.revalidate();
      mySplitter.repaint();
      mySplitter.setResizeEnabled(true);
    }
@Override
    protected void onImpl()