Autodesk 00128-051462-9310 User Guide - Page 1802

4 Under Calculation Standards, select your standard. Advanced: Using Classifications in Area Calculation Standards A common way of implementing a standard is to define offsets between spaces depending on their classifications. Even though you can do this with the area calculation standard API described in the previous sections and through usage of the available .NET API from AutoCAD Architecture, the Autodesk.Aec.SpaceOffsetRulesManager.AecSpaceOffsetClassification class provides some functionality to make the handling of classifications for offset calculations easier. Definition of Classifications in Resource Assembly Since classification names are displayed to the user in AutoCAD Architecture, their names should be localized. The API to use classifications within area calculations pays respect to that through the usage of resources to define the classification names of the classification set of a standard. Before your can apply and use classifications in your custom area calculation standard, you need to define them in a resource file that you need to add to your existing project (alternatively, you could create a resource-only assembly that is referenced). Please refer to the help of your development environment or the MSDN Online Library for information about creating string resources. It is assumed that the reader of this appendix is able to create and build a project that contains localized strings. Within this example, a resource file that implements one string table is assumed that defines the following global/local string pairs: Name Office Exterior Value Office Area Street Frontage Adding Classification Support to the Standard If you want your standard to work with classifications, you need to add an object of the type AecSpaceOffsetClassification to the standard after creating a resource set for the classification names. This class will handle all the classification-related functionality for the standard and within the implementation of the rule. Initializing the Database with Classifications The following example shows the required steps to populate the drawing the standard is applied to with the classification definitions. This must occur within the standard's AecSpaceOffsetStandard.InitDatabase virtual base class method, because the classifications need to be added to each new drawing that uses this standard. The following example shows how a new AecSpaceOffsetClassification object is created and initialized into the currently active database: 1762 | Chapter 36 Spaces