* @param designer
*******************************************************************************/
public LowerHalfPanel( Designer designer )
{
this.designer= designer;
this.buttonPanel= new ButtonPanel( this );
this.topLevelTabs= new TopLevelTabs( this );
super.setLayout( new BorderLayout() );
super.add( this.buttonPanel, BorderLayout.NORTH );
super.add( this.topLevelTabs, BorderLayout.CENTER );