The only safe way to Update Sliders in GhPython

[piac (Giulio Piacentino)]

Scheduling a solution after a previous one is finished is OK.

@piac

“never edit values while the definition is running”

In the trigger, before solving, you can make any changes that are required. You can use this method to achieve this:

GH_Document.ScheduleSolution Method (Int32, GH_Document.GH_ScheduleDelegate)

Example:
GrasshopperDocument.ScheduleSolution(someCallback)

someCallback can change values of sliders. Here is an example>

ghdoc.ExpireSolution required after modifying input NumberSlider?

Sorry for the late response, I was out last week. You definitely do not need to and should not expire more than absolutely necessary. Sliders are a bit more complicated than most objects because they host another slider control inside of them whose events will automatically trigger an expiration+update event. If you want to modify a slider without an immediate solution, you’ll want to use a more careful approach. I think TrySetSliderValue is not what you are after, it’s distinguishing feature…

Note that this method does not modify the current iteration.