Re: pgAdmin 4 v1.0: Problems with high dpi scaling on Win10

Hi

On Sun, Oct 2, 2016 at 11:43 PM, <viktor(at)troja(dot)ch> wrote:
> Hi list, hi Dave,
>
> On Windows 10 using a high res screen with high dpi scaling turned on and
> set to 200%, the text in the pgAdmin 4 (standalone) interface becomes almost
> illegible.
>
> The issue seems to be that pgAdmin claims to Windows that is high dpi aware
> when it actually isn’t. See http://doc.qt.io/qt-5/highdpi.html for more info
> about how QT deals with high dpi issues.

I think it's more subtle than that. Most of the dev team run Macs, and
high dpi support seems to work fine for us. We have had some issues
reported - but on my retina MBP for example, pgAdmin displays nicely
at all scaling levels.

> The short term solution would be to make the app dpi unaware, thus letting
> Windows take care of the scaling.

Have you tried setting QT_AUTO_SCREEN_SCALE_FACTOR? Does it make a
difference on Windows?

>
> Here an extract of the page above that seems relevant here:
>
>
>
> ---snip---
>
> In order to get an application designed for low DPI values running on a high
> resolution monitors quickly, consider one of the scaling options (let the
> application run as DPI Unaware on Windows or set the environment variable
> QT_AUTO_SCREEN_SCALE_FACTOR to "1". These options may incur some scaling or
> painting artifacts, though.
>
>
>
> In the longer term, the application should be adapted to run unmodified:
>
> - Always use the qreal versions of the QPainter drawing API.
>
> - Size windows and dialogs in relation to the screen size.
>
> - Replace hard-coded sizes in layouts and drawing code by values
> calculated from font metrics or screen size
>
> ---snip---
>
>
>
> pgAdmin III is not affected as it is clearly not dpi aware and therefore
> scaled by Windows. This leads to blurred text and icons but at least it’s
> big enough to be legible.
>
>
>
> Viktor

--
Dave Page
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Twitter: @pgsnake

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