OSGR panel doesn't handle being small

[rossburton]

If the OSGR panel isn't large on MacOS then the grid reference label isn't visible, see attachment.

Looks like the widget packing needs a bit of fiddling.

[burkmarr]

Hi Ross. I've noticed these layout issues before on QGIS with Mac. I can't reproduce in Windows - the image below shows the interface squeezed as tightly as possible with Windows 10. The plugin GUI is built with QT Designer (version 5.9.2) and uses the standard widget layouts provided by that. What you're seeing could be an issue with QT or with QGIS or the way that QGIS handles the QT plugin interfaces - I don't know. Unfortunately I don't have access to a Mac environment or the necessary experience with QT and Mac to address this myself, but I have labelled the issue to indicate that help is wanted. Hopefully it might catch the eye of someone that can help.

[charlesroper]

@burkmarr I have reproduced this on Windows. It's due to the display having a high pixel density (aka HiDPI or Retina) and, in the case of Windows, scaling being set to >100%. Here's a screenshot of what I see when I first open the tool:

Aside from the squashed elements at the bottom, notice how tiny the close and restore icons are. I was able to rectify this easily by dragging the border above the widget up, so that the widget occupies more vertical space:

Here is a screenshot of the settings on my laptop's 2880x1620 (marketed as 3K) display:

I've noticed all sorts of glitches and quirks in the QGIS UI on my display, which is down to, I think, QT (or at least QGIS's use of it) not being fully adapted to high density. It's got vastly better over the last year or two, though. When I first got this laptop in 2015, QGIS was practically unusable (as were many other applications) because everything in the UI was unscaled and tiny, or scaled and blurry. These days it's the exception to find an app that doesn't work with high-density displays.

A couple of suggestions for reproducing this problem:

• Get a high density display. All apps and websites should be ideally be tested on HiDPI displays now seeing as they're so prevalent. I think all Macs these days are Retina, and many new PC laptops are, too.

• Try setting your existing display to 200% scaling. This might be hard to use, but you could at least reproduce the problem.

More about high-density displays here: https://www.eizoglobal.com/library/basics/pixel_density_4k/

[burkmarr]

Thanks for the analysis @charlesroper - I've just reproduced on my laptop (which I normally use with external screens so hadn't noticed). I suspect that this can be fixed by changing the QT sizing policy of the widgets in question - perhaps setting minimal sizes. I've added the bug label so that it can be dealt with next time work is done. The workaround is just to resize currently - as you saw.

I suspect that would not have fixed the problem for @rossburton at the time he reported it because at that time QGIS 2 and the plugin was with QT 4 - now QGIS 3 and the plugin use QT 5 and, as you say, things have improved.