Re: [Libguestfs] another GTK3 regression...
On Wed, Sep 28, 2022 at 02:01:11PM +0200, Laszlo Ersek wrote:
(this reproduces at commit 0687cea6a86e; IOW the regression is not
from
the recent GTK-related patches, but due to building p2v with GTK3. as
opposed to GTK2)
In the first dialog, when the Test Connection button is clicked, a
spinner is supposed to be shown to the left, while p2v communicates via
v2v over ssh. This spinner is seen when running virt-p2v directly, but
not when running virt-p2v from a VM (using either a Live CD, or the
"run-virt-p2v-in-a-vm" makefile target).
This difference is not seen when virt-p2v is built with GTK2; in that
case, *both* scenarios (direct & VM) show the spinner properly.
I don't have an idea what the cause is. I vaguely suspect it could be
related to the windowing environment (window manager) in use. It pretty
much looks like a GTK3 bug to me; whatever the windowing environment,
the spinner should either be there or not. (It's possible that we have a
virt-p2v bug, of course, but why isn't the symptom consistent then? GTK3
should not have a dependency at all on the Window Manager.)
There certainly are dependancies on both the window manager, and the
desktop system (X11 vs wayland). There's a huge set of features that
widget toolkits can negotiate with window managers, and each window
manager supports a different set of extensions, just one example
being support for client side window decorations. In theory GTK should
adapt to expose the same functionality to users whereever possible but
there are certainly edge cases where this doesn't work, and bugs will
certainly be present for more obscure combinations like X11 + any non
mainstream window manager.
It is also not surprising to see a differnce from GTK2 to 3, as it
radically changed under the hood, most notably with native Wayland
support.
With regards,
Daniel
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