<div dir="auto">Extremely informative Andreas, thank you.<div dir="auto"><br></div><div dir="auto">I should have thought about the developer list! Drat!</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jan 17, 2024, 22:10 Andreas Neumann <<a href="mailto:a.neumann@carto.net">a.neumann@carto.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p>Hi Chris, Adam and others,</p>
<p>I am not the technical person to answer details, but I am on the QGIS PSC and can assure you that building QGIS on Qt6 is high up on our priority list (for at least a year or even longer). You can already build QGIS fine on Qt6 (for at least 2-3 versions now) but the core devs came across some blockers that had to be solved first, before we can bring this to the end users without major regressions:</p>
<ol>
<li>isues around qt3d and webengine compatibility (one could either use 3D or the webengine, not both together)</li>
<li>issues around the fact that Qt webengine cannot output HTML/web output to vectors when rendering to PDF</li>
<li>PyQt6 bindings had to be done</li>
</ol>
<p>While the first issue is already solved, the 2nd issue is currently being solved by introducing another library (<a href="https://github.com/JakubMelka/PDF4QT" target="_blank" rel="noreferrer">https://github.com/JakubMelka/PDF4QT</a>) and the third item is roughly 2/3 done and still actively being worked on.</p>
<p>Then there is the issue that all QGIS plugins have to be migrated to PyQt6 ...</p>
<p>We will probably offer QGIS Qt6 builds as technology previews soon in parallel to the normal Qt5 builds.</p>
<p>Now - about wayland: all of this has really nothing to do with Wayland but has to be done anyway, because Qt5 isn't developed any further and <a href="http://QGIS.ORG" target="_blank" rel="noreferrer">QGIS.ORG</a> already invested in Qt6 improvements from which we cannot yet take advantage of until we ship with Qt6.</p>
<p>Moving QGIS to Qt6 doesn't automatically mean that all QGIS wayland issues are solved - but probably quite a few of these issues.</p>
<p>Hope this clarifies the situation? If you want more detailed, more technical responses, I recommend discussions on the QGIS developers mailing list. It would only bore regular QGIS users ...</p>
<p>Greetings,</p>
<p>Andreas<br><a href="http://QGIS.ORG" target="_blank" rel="noreferrer">QGIS.ORG</a> treasurer and PSC member</p>
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<div>I don't know if you have recently run QGIS on a Wayland desktop, but there is a stern message strongly suggesting reverting to X.</div>
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<div>So as we seem to be marching away from X and ever forward to Wayland, I would like to start planning ahead a bit, and I would especially like to find some real information, as opposed to "I think this (but I really don't know)", or even worse, the people who can see a bright future for (let's say) Wayland-only desktops and aren't worried about the bumps on the road getting there.</div>
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<div>Fortunately it seems Ubuntu 24.04 will continue to support X <a href="https://discourse.ubuntu.com/t/ubuntu-desktop-24-04-lts-roadmap-highlights/41032" rel="noopener noreferrer noreferrer" target="_blank">https://discourse.ubuntu.com/t/ubuntu-desktop-24-04-lts-roadmap-highlights/41032</a> so in my case at least I know I can drop back to X if / as necessary for the immediate future.</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid #cccccc;padding-left:1ex"><br>> There is some stuff on GitHub but it seems to be at least a year or two<br>> old, talking about Qt6.0 and I gather we are at Qt6.6 by now. Plus endless<br>> short conversations in places like Reddit that throw off more heat than<br>> light.<br><br>Updating to a new Qt version is likely going to be a lot of work, sot<br>imagine nobody is that keen on starting until there's really no choice.</blockquote>
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<div>As it happens, a search for qt6 in the QGIS repo on GitHub shows work being done on qt6, apparently for QGIS 4. So maybe someone has started already? I wonder how that's going?</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid #cccccc;padding-left:1ex"><br>> Does anyone have any suggestions as to where to keep informed on this<br>> topic? Because it seems like Wayland is coming whether we want it or not...<br><br>Wayland has been around for many years at this point, and is already the<br>default on some Linux distributions, which have no problem running<br>QGIS. There is so much legacy code that they are always going to have<br>compatibility modules to keep non-Wayland programs usable. I wouldn't<br>worry about any programs suddenly breaking due to Wayland.</blockquote>
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<div>While I appreciate your attempts to reassure me, this isn't helping.</div>
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<div>I'm aware from firsthand experience that Wayland has been around for many years at this point. I have even used it on and off. In fact it's my daily driver on my laptop.</div>
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<div>My concern is learning how QGIS development might converge - or not - with a Wayland-only future, since it seems several important Linux distros are leaning away from supporting X to some degree or another.</div>
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<div>As to whether QGIS might break under Wayland, there are 31 issues in the QGIS repo as of this evening related to Wayland in some form or the other. Plus the warning I mentioned above.</div>
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<div dir="ltr">Chris Hermansen · clhermansen "at" gmail "dot" com<br><br>C'est ma façon de parler.</div>
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