[QGIS-Developer] Development / HiDPI / Linux

[Richard Duivenvoorde]

If on GNOME 3.26, I reas something about an experimental features recently:

https://www.maketecheasier.com/enable-fractional-scaling-gnome/

Regards,

Richard Duivenvoorde


On 16-10-17 16:44, Matthias Kuhn 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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