This turned out to be a race between the dashboard's dataset db
subscriber being initialised and the applet "embed" request, with
artiq.applet.simple not being able to handle the unexpected "mod"
message. We were only handling the other ordering outcome of this
race before.
I had introduced this in f11aef74b as a means of quickly cleaning up
after e.g. an exploratory session where a lot of transient applets were
opened from ndscan, or for a dashboard that has been running for a while
with CCBs enabled but without anybody actually working there.
It turns out that one usually wants the few docked applets to stay open,
as they were necessarily arranged manually at some prior point. And as a
corollary to the latter, if one did want to close them as well, doing so
manually would not be too onerous either.
This allows ndscan v0.3+ to use the IPC interface for efficiency;
previously, the non-upstreamed RID dataset namespace feature allowed
the applets to somewhat efficient subscribe directly to the master
process via the socket interface.
KeyError raised when trying to load default_state()
due to missing Key "seed" in "RangeScan" and "CenterScan" in
state. Add {"seed": None} to resolve the bug.
Even though the code already used non-greedy wildcards before,
it would not find the shortest match, as earlier match starts
would still take precedence.
This could possibly be sped up a bit in CPython by doing
everything inside re using lookahead-assertion trickery, but the
current code is already imperceptibly fast for hundreds of
choices.
Quickly closing/reopening applets (e.g. quickly clicking the checkbox
on an entire folder of applets) would previously lead to an occasional
KeyError on the self.dock_to_item access in on_dock_closed, as close()
would be invoked more than once.
The geometry/checked state handling can potentially be cleaned up
further, but at least this avoid the crash.
* parametrized by center/span/step instead of
start/stop/npoints which is more convenient in some applications
* no scan widget support so far
Signed-off-by: Robert Jördens <rj@quartiq.de>
