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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">The PR in question: https://github.com/erlang/otp/pull/2105<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">It’s possible that OBSERVER_SCALE misses some things. It “works on my machine”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">which is Arch Linux with Gnome Shell and wx 3.0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">I do have HiDPI configured globally in Gnome so the scale has been useful mainly for<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">the hand drawn parts of the Observer, which ignore those settings.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Maybe that’s what you are missing.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Loïc Hoguin</span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">erlang-questions <erlang-questions-bounces@erlang.org> on behalf of Dan Gudmundsson <dangud@gmail.com><br>
<b>Date: </b>Tuesday 28 September 2021 at 09:13<br>
<b>To: </b>Rick Payne <rickp@rossfell.co.uk><br>
<b>Cc: </b>Erlang Questions <erlang-questions@erlang.org><br>
<b>Subject: </b>Re: Observer font sizes on HiDPI displayer<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Yeah HiDPI is a mess in wx applications currently. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The OS's have handled this differently, with GTK being behind of course. <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">wxWidgets have some support in 3.0.x release and more coming in 3.2.<o:p></o:p></p>
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<p class="MsoNormal">wxWidgets sees 3.1 as a developer release so linux distributions don't distribute that, <o:p></o:p></p>
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<p class="MsoNormal">the wxWidgets team never seems to finish 3.2, and patches 3.0 very little since all development is<o:p></o:p></p>
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<p class="MsoNormal">on 3.1, sigh.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I have not owned a HiDIP screen so I have not had any problems with this, nor been able to test it,<o:p></o:p></p>
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<p class="MsoNormal">thus basically ignoring the problem altogether until the world came up with a solution of how to handle it.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">OBSERVER_SCALE was a temporary hack to make it work a couple of years ago, I don't remember the<o:p></o:p></p>
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<p class="MsoNormal">discussion but it might have been a PR or something I did for Loic after a discussion on this mailing list.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So this is a mess, and I could really need some help from someone jumping into the rabbit hole.<o:p></o:p></p>
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<p class="MsoNormal">There are probably some functions in wx-api that are missing, and we need to scale the fonts and drawing done<o:p></o:p></p>
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<p class="MsoNormal">in the observer tabs.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">/Dan<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Sep 28, 2021 at 4:08 AM Rick Payne <<a href="mailto:rickp@rossfell.co.uk">rickp@rossfell.co.uk</a>> wrote:<o:p></o:p></p>
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Running Ubuntu 20.04 and i3 as my window manager, and I'm struggling<br>
with Observer ending up with tiny text. This is on a Dell XPS 13 with a<br>
HiDPI display. Clearly I'm making things a bit difficult for myself, so<br>
wondering if I've missed something...<br>
<br>
I can set the environment variable GDK_DPI_SCALE to (say) 1.6 and that<br>
helps to a certain extent. The text on the 'System' page is much more<br>
readable.<br>
<br>
I can set another (undocumented?) environment variable OBSERVER_SCALE<br>
to (say) 3 and now the 'Load Charts' page is readable as are the graphs<br>
on the 'Memory Allocator' page. However the list of allocators at the<br>
bottom is very small and hard to read. Ditto the process list on the<br>
'Processes' page. In fact any text that is generated from a list.<br>
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I've never played with wx much but I had a quick look at the code which<br>
is how I found the OBSERVER_SCALE trick. However, I don't grok it all<br>
yet. For instance, I'm suprised that GDK_DPI_SCALE affects the fonts on<br>
one page, but not on others - so clearly some different drawing<br>
mechanism is at play.<br>
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Anyone else have this issue and found a solution?<br>
<br>
Cheers<br>
Rick<o:p></o:p></p>
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