How to determine which monitor is being used at runtime

[rmustard511]

I make changes to my installation on a 27in monitor but run MM on a different monitor (located elsewhere in house) that uses a 14in (prior laptop) screen.

Been looking around for a module (or some code) to let MM determine which monitor (runtime env) is being used - as the font sizes and module placements need to change to due the screen size differences. Note: Rpi 3 is being moved back and forth from one location to the other such that the only variable is the monitor.

Anybody have a similar situation? How’d you handle i? (Don’t really want to use custom.css if don’t have to - as I would still need to know which monitor is being used!)

[sdetweil]

@rmustard511 you can code into custom.css to switch resolutions based on screen size

in another app I do

:root{
  --scale-factor: 1;  /* set default scaling in case we have partial window, debug or in vm terminal window */
  --design-width: 1920px;
  --design-height: 1080px;
}

@media screen and (orientation: landscape) {
    :root{
        --scale-factor: var(width) / var(--design-width);
     };
 }
 @media screen and (orientation: portrait) {
    :root{
        --scale-factor: var(width) / var(--design-height);
     };
 }

and then I can scale the font size (and other things, border. … blah blah blah ) based on that

ul.calendar {
    list-style: none;
    font-size:  calc( 22px * var(--scale-factor));
    margin-left:  calc( 10px * var(--scale-factor));
    padding: 0;
}

the hard coded value is the expected horizontal value at the default resolution

  --scale-factor: 1;  /* set default scaling in case we have partial window, debug or in vm terminal window */
  --design-width: 1920px;
  --design-height: 1080px;

so smaller screens will get smaller size and large screens will get larger size

[rmustard511]

@sdetweil Thanks Sam. I’ll give that a shot soon as I get a chance. I suspect I’ll mess it up… and make new questions… (as a newbie on this!!)

[sdetweil]

@rmustard511 no problem, we all have to learn stuff every day