*/
public void setWidth(final int totalWidth)
{
if (widget.getWidgetCount() > 0)
{
throw new DkUnsupportedMethodException("This method must only be called before adding any field to the form panel.");
}
widget.setWidth(totalWidth);
this.columnWrapWidth = getWidthFor1Column(totalWidth);
this.columnWidth = numberOfColumns == 1 ? columnWrapWidth : getWidthForNColumns(totalWidth, numberOfColumns);
this.originalTotalWidth = totalWidth;