Code execution entry point

Replies to This Discussion

Permalink Reply by Fred Becquelin on January 17, 2016 at 3:39am

This might help...

http://james-ramsden.com/draw-order-calculation-in-grasshopper/

Permalink Reply by David Rutten on January 17, 2016 at 3:50am

You can create a class which derives from the GH_AssemblyPriority class. Every public class in your assembly which inherits from this class and which has a blank constructor will be instantiated and executed just before the remainder of your GHA is loaded. It was originally designed to give GHA developers a way to prevent their GHA form being loaded (missing license data, expired trial, etc.).

There are no events associated with the end-of-loading or unloading of Grasshopper, however you can watch for the regular Rhino.Commands.Command.EndCommand event to see whether the command that just ran was "Grasshopper" or "GrasshopperUnload".

Permalink Reply by David Rutten on January 17, 2016 at 3:51am

Normally GH developers put code in a GH_Component subclass which is only executed if the class is instantiated.

Every component btw. IS instantiated during Grasshopper loading. It just isn't run, but the Category, Subcategory, Name, Description, Icon and Exposure are harvested during load.

Permalink Reply by Long Nguyen on January 18, 2016 at 1:57am

Thanks guys. Very helpful. I will try out what you suggested today. Especially the GH_AssemblyPriority. :)