Scale cards based on display size

[cassidyjames]

Fixes #303

Right now this only scales the wallpaper on the card to be a quarter of the display size (which is roughly what the original mockup had).

Notes:

• The wallpaper on the card will match the display aspect ratio; before, it was always 2:1
• Fonts or anything else are not scaled any differently
• I'm not sure how this works on multiple differently-sized displays attached to one machine
• Right now (WIP) it's getting the display size each time to use it, need to DRY that out
• Setting the size to ¼ the display size means you can usually see 1½ users on either side, for a total of 3–5 (at least partially) visible users depending on which user you're scrolled to.

[cassidyjames]

1024×768 (smallest supported resolution)

1920×1080 (same layout for 4K HiDPI)

2560×1440 (common on big ol' 27" displays)

[cassidyjames]

It looks like the scale in the construct block is not correct, but always returns 1. The means the cards are twice as big as they should be in each dimension.

[ghost]

So, a question about setting this. I run in 1600x900, with the "Larger" setting for text, as I have vision problems.

Would or should I be able to separately set the lightdm resolution to 1024x768, if only to make the user cards and login box large enough for me to see comfortably?

[cassidyjames]

@callieg that's not really related to this branch, as this does not affect the text size; it just makes the card itself (and wallpaper) fill up more space relative to the display.

But to answer your question, I don't believe resolution is carried over from the user session, and there's not currently a graphical way to set a manual resolution on the greeter. However, the font scaling should probably be added as a setting that gets respected on the greeter as well.

[ghost]

And Cassidy, this is why I love you guys. I am no programmer, not even remotely, I am just an enthusiastic user, but you did actually take the time to respond to this.

And you should know that it is greatly appreciated.

[BAProductions]

Not needed have look at my fix #65 (comment)