[Qgis-developer] QGIS/Linux on high-resolution displays

[Eric Goddard]

Hi Barry,

I also have the developer edition of the XPS 13. I've replaced ubuntu
14.04 with Fedora 23, but I think changing the following settings
should work for you too. Change the Style, Icon size, and Font sizes
in QGIS under Settings -> Options.

Changing the Style from GTK+ to Adwaita fixed some of the issues with
drop-downs, buttons, and cell sizes in the attribute table cutting off
the text. You may not have that problem though; I can't remember if
that issue came before or after the switch to Fedora/Gnome 3.

Changing the font size to 11 and the icon size to 48 works for me and
feels pretty 'standard'. Since making those changes QGIS is working
wonderfully on the XPS 13.

Hope that helps!
Eric

On Wed, Jun 8, 2016 at 1:34 PM, Barry Rowlingson
<b.rowlingson at lancaster.ac.uk> wrote:
> On Wed, Jun 8, 2016 at 6:24 AM, Alessandro Pasotti <apasotti at gmail.com> wrote:
>> 2016-06-07 23:17 GMT+02:00 Barry Rowlingson <b.rowlingson at lancaster.ac.uk>:
>>>
>>> Ive just bought a Dell XPS13 which came with Ubuntu 14.04
>>> pre-installed. The screen is 3200 pixels across. Getting applications
>>> to scale properly is a nightmare.
>>>
>>> QGIS (and I guess all Qt apps) seems to be the worst. The icons are
>>> microscopic, and the text and other interface elements overlap. It is
>>> unusable. Same for Gimp and Inkscape, but I mostly use QGIS.
>>
>>
>>
>> QGIS works pretty well (with some minor glitches) in KDE on 4K and retina
>> screens, see the tips and the links in this article
>> http://www.itopen.it/qgis-and-qt-getting-ready-for-hidpi-screens/
>
> Hmm I had more than minor glitches. The problem is that there were so
> many possible things to tweak I could never be sure what was helping!
>
>> No, try setting:
>> - the dpi resolution in the display configuration of your OS (system
>> settings), that is usually a wrapper for xrandr
>> - for QT5, the env vars  QT_DEVICE_PIXEL_RATIO=2 and/or
>> QT_SCREEN_SCALE_FACTORS=2
>> - icon size in QGIS can be (at least in part, for the toolbar) configured in
>> the QGIS options dialog
>>
>> See also: http://doc.qt.io/qt-5/highdpi.html
>>
>
> Since those are all Qt5 things they're no good with QGIS at the
> moment, yes? Or is there a QGIS built against Qt5.6+ that I could be
> using?
>
>  I've got the icons scaled up now, but there's still some tiny UI
> elements - the visibility toggles on layers, and the little plus signs
> that expand trees are almost invisible...
>
> thanks for the tips
>
> Barry
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