[QGIS-Developer] Development / HiDPI / Linux

[Alessandro Pasotti]

Hi Mathias,

My only real problem now is with PgAdmin 3, all other applications that I
use are running just fine on HiDPI.

The apps I uses more often are: QGIS, various browsers, thunderbird, Qt
creator 4 and they are all ok.

What I usually do to fine-tune all is to force dpi in the display section
of the system config panel (I think it goes directly to X through xrandr).

But I'm on Kubuntu xenial, perhaps that makes a difference.



On Mon, Oct 16, 2017 at 4:44 PM, Matthias Kuhn <matthias at opengis.ch> wrote:

> Hi developers,
>
> Just for a couple of days I'm a happy owner of a HiDPI device on which I
> immediately setup Fedora 27 which ships with Gnome 3.26, wayland, Qt 5.9
> and all the other nice new libraries and stuff.
>
> Trying to develop (and use the system otherwise) I failed terribly to
> get a satisfactory configuration for QGIS development (and also
> otherwise). There are a few knobs to "finetune" DPI, but I just seem not
> to be able to get things right. Each variable I set somewhere has
> side-effects somewhere else.
>
> * Gnome itself already has a scale setting which at 100% makes things
> very, very tiny and at 200% (the only other option) makes everything
> grandma mode.
>
> * Then there is also the environment variable
> QT_AUTO_SCREEN_SCALE_FACTOR which seems to make Qt Creator a bit more
> usable. (Qt Creator internally actually seems to be using two different
> dpi's - probably QML vs. QWidget issues) But with this env variable set,
> the QGIS interface seems to be scaled up twice.
>
> * Then there are various other variables for Thunderbird, Firefox, ...
> that again allow to scale contents for specific applications
>
> * And I read somewhere about xrandr for additional zooming, but I'm
> neither convinced that this is a good approach since some mouse setting
> apparently needs to compensate for this, nor does this seem to have any
> effect (probably because of Wayland) Source:
> https://wiki.archlinux.org/index.php/HiDPI
>
>
> So apart from a rant for the mess by GUI frameworks and window managers,
> there's also a question: did anyone succeed to set things up properly?
>
>
> Thanks
>
> Matthias
>
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-- 
Alessandro Pasotti
w3:   www.itopen.it
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