On the master/EnvExperiment side, the only addition is an optional
property `argument_ui` that is made accessible to the dashboard, e.g.
class Example(EnvExperiment):
argument_ui = "ndscan"
def build(self):
…
Clients – primarily artiq_dashboard, but in principle e.g. a
command-line UI could do the same – can then compare the value to a
list of well-known names and prefer any matching custom UI handlers.
On the dashboard side, this commit adds the mechanism to register
a custom argument editor for a given argument_ui string, i.e. the
widget that displays the parameter values within the wider
experiment UI shell with the submit button, pipeline parameters, and
so on. The registry remains empty by default and would be filled by
out-of-tree plugins such as ndscan.
The UI state readback is implemented somewhat defensively to avoid
needless disruptions to users when upgrading.
These are used by ndscan, as re-serialising the entire ndscan
parameter metadata tree, which can grow to be quite extensive,
on every single Qt change event is a bit excessive (and would
probably cause a bit of lag while typing for big experiments
on low-end machines).
This is analogous to the explist/schedule subscribers, and allows
custom argument editors (such as ndscan) to provide hints/defaults/…
from datasets once available.
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.
When serialising a list of objects `_send_rpc_value` makes a copy of the
upcoming tags to pass repeatedly to the recursive call. Then uses
`_skip_rpc_value` to skip over the tags that should have been processed.
This didn't handle numpy arrays so, after processing a list of arrays it
got out of sync and failed.
Signed-off-by: Michael Birtwell <michael.birtwell@oxionics.com>
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.
