Bug 180864 Change Allow Null option in Cascading Group.[0705]
Description: Change Allow Null option in Cascading Group. Build number:2.2.0.v20070404 Steps to reproduce: 1. New a cascading group and add sub parameter. Expected result: Is Required option in cascading group definition dialog. Actual result: Allow null value option in Cascading Group definition dialog Error log:N/A
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/CascadingParametersDialog.java
{
			return;
		}
		try
		{
			inputParameterGroup.getParameters( ).drop( choice );
		}
		catch ( SemanticException e )
		{
			ExceptionHandler.handle( e );
			return;
		}
		refreshValueTable( );
		index--;
		if ( index < 0 && valueTable.getTable( ).getItemCount( ) > 1 )
		{
			index = 0;
		}
		StructuredSelection selection = null;
		if ( index != -1 )
		{
			selection = new StructuredSelection( valueTable.getTable( )
					.getItem( index )
					.getData( ) );
		}
		else
		{
			selection = StructuredSelection.EMPTY;
		}
		valueTable.setSelection( selection );