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
{
			defaultValueEditor.setText( defaultValue );
		}
		helpTextEditor.setText( UIUtil.convertToGUIString( selectedParameter.getHelpText( ) ) );
		if ( selectedParameter.getPropertyHandle( ScalarParameterHandle.LIST_LIMIT_PROP )
				.isSet( ) )
		{
			listLimit.setText( String.valueOf( selectedParameter.getListlimit( ) ) );
		}
		else
		{
			listLimit.setText( "" ); 
		}
		allowNull.setSelection( selectedParameter.allowNull( ) );
		changeDataType( selectedParameter.getDataType( ) );
		loading = false;
	}
	private void clearParamProperties( )
	{
		paramNameEditor.setText( "" ); 
		promptText.setText( "" ); 
		dataTypeChooser.select( -1 );
		displayTypeChooser.select( -1 );
		defaultValueEditor.setText( "" ); 
		helpTextEditor.setText( "" ); 
		formatField.setText( "" ); 
		listLimit.setText( "" ); 
		previewLable.setText( "" ); 
		allowNull.setSelection( false );
	}