Hi @EMtx,
I've built slicers previously, but only from the existing documentation as a reference. Unfortunately, I can't share these as they were developed privately for clients. ultimately, you need to think about:
- Constructing a valid filter based on your visual's UI.
- Applying this filter to the main window via the filter API.
- Restoring your visual's UI state from the jsonFilters array that Power BI returns in the visual's update method. Bear in mind that Power BI may not apply a filter you request due to considerations it makes to reduce computation effort (such as other visuals on the page not necessarily needing the filter or your filter containing criteria that are invalid for your data model), so you may need to look at this during the lifecycle of your visual, as well as when it is restored on the canvas.
If you want some recent examples to refer to and possibly clone and build, you can look at the Text Search Slicer by databrothers (who open-source their code) or MS's Text Filter (which has received some recent-ish updates). These will hopefully give you an idea of how to start working with the filter APIs and how you might think about designing your visual.
Good luck!
Daniel
