Add support for percentage step size to fans

[bdraco]

Proposed change

Add support for percentage step size to fans

The pin value is now rounded to prevent floating points from showing up in the UI.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion: Implement percentage step sizes for fans core#46512
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

[spacegaier]

Not having the pin feels a bit inconsistent since I think we have it in most (?) other sliders. Couldn't we just round the pin value?

[bdraco]

Not having the pin feels a bit inconsistent since I think we have it in most (?) other sliders. Couldn't we just round the pin value?

Any idea how to do that? I couldn't find a way that worked with the underlying api

[Misiu]

@spacegaier @bdraco maybe do it the other way:
Leave the step size=1, but change the slider max value. So if you have 7 speeds then you will move the value from 1 to 7.
This way the pin will show the speed as a number, but not as a percentage value (no need for rounding).

[bdraco]

While I think that will solve the pin issue, we would still need to translate the speed number back into a percentage so we still get a float, but at least we could hide it.

If the fan doesn't have a fixed step (100 speeds) aka variable rate fan they would get 1-100 still.

The downside is we loose a bit of the abstraction.

[bdraco]

I came up with a solution to avoid the need to hide the pin.