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Make pause/resume feed methods sync again 

We can instead use the god widget's nursery to schedule all the feed
pause/resume requests and be even more concurrent during a view (of
symbols) switch.

Use `tractor.trionics.gather_contexts()` to start up the fsp and volume
chart-displays (for an additional conc speedup). Drop `dolla_vlm` again for
now until we figure out how we can display it *and* vlm on the same
sub-chart? It would be nice to avoid having to spawn an fsp process
before showing the volume curve.
py3.10_support
Tyler Goodlet 2021-12-22 08:30:22 -05:00
parent 8722cf4c49
commit 9c57f10e77
2 changed files with 42 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
piker/ui/_chart.py
View File

@ -229,7 +229,7 @@ class GodWidget(QWidget):
await trio.sleep(0)
# resume feeds *after* rendering chart view asap
await chart.resume_all_feeds()
chart.resume_all_feeds()
self.linkedsplits = linkedsplits
symbol = linkedsplits.symbol
@ -361,7 +361,7 @@ class LinkedSplits(QWidget):
if not prop:
# proportion allocated to consumer subcharts
if ln < 2:
prop = 1/(.375 * 6)
prop = 1/3
elif ln >= 2:
prop = 3/8
@ -631,8 +631,11 @@ class ChartPlotWidget(pg.PlotWidget):
**kwargs,
):
"""Configure chart display settings.
"""
'''
Configure initial display settings and connect view callback
handlers.
'''
self.view_color = view_color
self.pen_color = pen_color
@ -692,15 +695,13 @@ class ChartPlotWidget(pg.PlotWidget):
# for when the splitter(s) are resized
self._vb.sigResized.connect(self._set_yrange)
async def resume_all_feeds(self):
async with trio.open_nursery() as n:
def resume_all_feeds(self):
for feed in self._feeds.values():
n.start_soon(feed.resume)
self.linked.godwidget._root_n.start_soon(feed.resume)
async def pause_all_feeds(self):
async with trio.open_nursery() as n:
def pause_all_feeds(self):
for feed in self._feeds.values():
n.start_soon(feed.pause)
self.linked.godwidget._root_n.start_soon(feed.pause)
@property
def view(self) -> ChartView:

66
piker/ui/_display.py
View File

@ -36,7 +36,7 @@ import trio
from .. import brokers
from .._cacheables import maybe_open_context
from ..trionics import async_enter_all
from tractor.trionics import gather_contexts
from ..data.feed import open_feed, Feed
from ._chart import (
ChartPlotWidget,
@ -266,7 +266,7 @@ async def update_chart_from_quotes(
# chart isn't active/shown so skip render cycle and pause feed(s)
if chart.linked.isHidden():
await chart.pause_all_feeds()
chart.pause_all_feeds()
continue
for sym, quote in quotes.items():
@ -601,9 +601,6 @@ async def start_fsp_displays(
group_status_key: str,
loglevel: str,
# this con
display_in_own_task: bool = False,
) -> None:
'''
Create sub-actors (under flat tree)
@ -626,7 +623,7 @@ async def start_fsp_displays(
for (display_name, conf), (name, portal) in zip(
fsps.items(),
# rr to cluster for now..
# round robin to cluster for now..
cycle(cluster_map.items()),
):
func_name = conf['func_name']
@ -925,16 +922,14 @@ async def maybe_open_vlm_display(
shm, opened = maybe_mk_fsp_shm(
linked.symbol.key,
'$_vlm',
'vlm',
readonly=True,
)
async with open_fsp_sidepane(
linked, {
'vlm': {
'params': {
'price_func': {
'default_value': 'chl3',
# tell target ``Edit`` widget to not allow
@ -962,9 +957,6 @@ async def maybe_open_vlm_display(
# we do this internally ourselves since
# the curve item internals are pretty convoluted.
style='step',
# original pyqtgraph flag for reference
# stepMode=True,
)
# XXX: ONLY for sub-chart fsps, overlays have their
@ -999,7 +991,6 @@ async def display_symbol_data(
provider: str,
sym: str,
loglevel: str,
order_mode_started: trio.Event,
) -> None:
@ -1026,8 +1017,7 @@ async def display_symbol_data(
# group_key=loading_sym_key,
# )
async with async_enter_all(
open_feed(
async with open_feed(
provider,
[sym],
loglevel=loglevel,
@ -1035,11 +1025,8 @@ async def display_symbol_data(
# limit to at least display's FPS
# avoiding needless Qt-in-guest-mode context switches
tick_throttle=_quote_throttle_rate,
),
maybe_open_fsp_cluster(),
) as (feed, cluster_map):
) as feed:
ohlcv: ShmArray = feed.shm
bars = ohlcv.array
symbol = feed.symbols[sym]
@ -1091,19 +1078,19 @@ async def display_symbol_data(
# TODO: eventually we'll support some kind of n-compose syntax
fsp_conf = {
'dolla_vlm': {
'func_name': 'dolla_vlm',
'zero_on_step': True,
'params': {
'price_func': {
'default_value': 'chl3',
# tell target ``Edit`` widget to not allow
# edits for now.
'widget_kwargs': {'readonly': True},
},
},
'chart_kwargs': {'style': 'step'}
},
# 'dolla_vlm': {
# 'func_name': 'dolla_vlm',
# 'zero_on_step': True,
# 'params': {
# 'price_func': {
# 'default_value': 'chl3',
# # tell target ``Edit`` widget to not allow
# # edits for now.
# 'widget_kwargs': {'readonly': True},
# },
# },
# 'chart_kwargs': {'style': 'step'}
# },
# 'rsi': {
# 'func_name': 'rsi', # literal python func ref lookup name
@ -1147,10 +1134,15 @@ async def display_symbol_data(
await trio.sleep(0)
vlm_chart = None
async with (
trio.open_nursery() as ln,
maybe_open_vlm_display(linkedsplits, ohlcv) as vlm_chart,
):
async with gather_contexts(
(
trio.open_nursery(),
maybe_open_vlm_display(linkedsplits, ohlcv),
maybe_open_fsp_cluster(),
)
) as (ln, vlm_chart, cluster_map):
# load initial fsp chain (otherwise known as "indicators")
ln.start_soon(
start_fsp_displays,
@ -1164,7 +1156,7 @@ async def display_symbol_data(
loglevel,
)
# start graphics update loop(s)after receiving first live quote
# start graphics update loop after receiving first live quote
ln.start_soon(
update_chart_from_quotes,
linkedsplits,