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
{
				if ( selectedParameter != null
						&& selectedParameter != newParameter )
				{
					try
					{
						String newControlType = getSelectedDisplayType( );
						if ( PARAM_CONTROL_COMBO.equals( newControlType ) )
						{
							newControlType = DesignChoiceConstants.PARAM_CONTROL_LIST_BOX;
							
							selectedParameter.setMustMatch( false );
						}
						else if ( PARAM_CONTROL_LIST.equals( newControlType ) )
						{
							newControlType = DesignChoiceConstants.PARAM_CONTROL_LIST_BOX;
							
							selectedParameter.setMustMatch( true );
						}
						else
						{
							selectedParameter.setProperty( ScalarParameterHandle.MUCH_MATCH_PROP,
									null );
						}
						selectedParameter.setControlType( newControlType );
					}
					catch ( SemanticException e1 )
					{
						ExceptionHandler.handle( e1 );
					}