Bug 166315 Combo box doesn't allow blank when set string type in parameter editor
Combo box doesn't allow blank when set string type in parameter editor Steps to reproduce: 1.New a parameter, display type is Combo Box 2.Select data type as String Expected result: "Allow blank values" is enable. Actual result: "Allow blank values" is gray and can't be checked.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
}
			else
			{
				formatCategroy = inputParameter.getCategory( );
				if ( formatCategroy == null )
				{
					formatCategroy = DesignChoiceConstants.STRING_FORMAT_TYPE_UNFORMATTED;
				}
				formatPattern = inputParameter.getPattern( );
			}
		}
		updateFormatField( );
	}
	private void refreshDataSets( )
	{
		String selectedDataSetName = dataSetChooser.getText( );
		String[] oldList = dataSetChooser.getItems( );
		List dataSetList = new ArrayList( );
		for ( Iterator iterator = inputParameter.getModuleHandle( )
				.getVisibleDataSets( )
				.iterator( ); iterator.hasNext( ); )
		{
			DataSetHandle DataSetHandle = (DataSetHandle) iterator.next( );
			dataSetList.add( DataSetHandle.getQualifiedName( ) );
		}
		if ( inputParameter.getDataSetName( ) != null
				&& !dataSetList.contains( inputParameter.getDataSetName( ) ) )
		{
			dataSetList.add( 0, inputParameter.getDataSetName( ) );
		}