private void recalculateMaxValues() {
      myIdxLeft = widestEditor(myLeftEditors);
      final Editor leftEditor = myLeftEditors.get(myIdxLeft);
      final int wholeWidth = leftEditor.getContentComponent().getWidth();
      final Rectangle va = leftEditor.getScrollingModel().getVisibleArea();
      final int visibleLeft = leftEditor.xyToVisualPosition(new Point(va.width, 0)).column;

      myMaxColumnsLeft = (int) (visibleLeft * ((double) wholeWidth / va.getWidth()));

      myIdxRight = widestEditor(myRightEditors);
      final Editor rightEditor = myRightEditors.get(myIdxRight);
      final int wholeWidthRight = rightEditor.getContentComponent().getWidth();
      final Rectangle vaRight = rightEditor.getScrollingModel().getVisibleArea();
      final int visibleRight = rightEditor.xyToVisualPosition(new Point(va.width, 0)).column;

      myMaxColumnsRight = (int) (visibleRight * ((double) wholeWidthRight / vaRight.getWidth()));

      myByLeft = !(myMaxColumnsLeft <= visibleLeft);
      if (!myByLeft) {
        // check right editor
        if (myLeftScroll.getVisibleAmount() != visibleRight) {
          myLeftScroll.setVisibleAmount(visibleRight);
        }
        myLeftScroll.setMaximum(myMaxColumnsRight);
      } else {
        if (myLeftScroll.getVisibleAmount() != visibleLeft) {
          myLeftScroll.setVisibleAmount(visibleLeft);
        }
        myLeftScroll.setMaximum(myMaxColumnsLeft);
      }
    }