Best way to determine user's screensize?

[Ethan Furman]

On 10/31/20 11:24 AM, Peter J. Holzer wrote:
> On 2020-10-31 11:58:41 -0500, 2QdxY4RzWzUUiLuE at potatochowder.com wrote:

>> I don't think we're disagreeing too much here, either.  IMO, the user
>> should be in control, whether by config file or command line or
>> whatever,
> 
> Config files and command lines are inputs to the application. The
> programmer has to decide what options to accept, what they mean and how
> to process them. As far as this discussion is concerned, they are
> strictly part of the application.

I'm not sure which of the above two snippets I'm (dis)agreeing with, but if the user has specified in the config file 
that they want "full screen", how does the application tell the layout manager that?

(And yes, I have three screens, and each one has a full-size window running in it.  Also, four virtual desktops, one for 
each area of interest.  I hate overlapping windows.)

--
~Ethan~