Initial chart widget adjustments for agg feeds
Main "public" API change is to make `GodWidget.get/set_chart_symbol()` accept and cache-on fqsn tuples to allow handling overlayed chart groups and adjust method names to be plural to match. Wrt `LinkedSplits`, - create all chart widget axes with a `None` plotitem argument and set the `.pi` field after axis creation (since apparently we have another object reference causality dilemma..) - set a monkeyed `PlotItem.chart_widget` for use in axes that still need the widget reference. - drop feed pause/resume for now since it's leaking feed tasks on the `brokerd` side and we probably don't really need it any more, and if we still do it should be done on the feed not the flume. Wrt `ChartPlotItem`, - drop `._add_sticky()` and use the `Axis` method instead and add some overlay + axis sanity checks. - refactor `.draw_ohlc()` to be a lighter wrapper around a call to `.add_plot()`.axis_sticky_api
Tyler Goodlet
parent
9217610734
commit
00be100e71
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@ -45,7 +45,6 @@ import trio
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from ._axes import (
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DynamicDateAxis,
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PriceAxis,
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YAxisLabel,
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)
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from ._cursor import (
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Cursor,
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@ -168,18 +167,18 @@ class GodWidget(QWidget):
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# self.strategy_box = StrategyBoxWidget(self)
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# self.toolbar_layout.addWidget(self.strategy_box)
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def set_chart_symbol(
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def set_chart_symbols(
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self,
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symbol_key: str, # of form <fqsn>.<providername>
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group_key: tuple[str], # of form <fqsn>.<providername>
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all_linked: tuple[LinkedSplits, LinkedSplits], # type: ignore
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) -> None:
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# re-sort org cache symbol list in LIFO order
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cache = self._chart_cache
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cache.pop(symbol_key, None)
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cache[symbol_key] = all_linked
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cache.pop(group_key, None)
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cache[group_key] = all_linked
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def get_chart_symbol(
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def get_chart_symbols(
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self,
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symbol_key: str,
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@ -188,8 +187,7 @@ class GodWidget(QWidget):
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async def load_symbols(
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self,
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providername: str,
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symbol_keys: list[str],
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fqsns: list[str],
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loglevel: str,
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reset: bool = False,
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@ -200,20 +198,11 @@ class GodWidget(QWidget):
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Expects a ``numpy`` structured array containing all the ohlcv fields.
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'''
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fqsns: list[str] = []
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# our symbol key style is always lower case
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for key in list(map(str.lower, symbol_keys)):
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# fully qualified symbol name (SNS i guess is what we're making?)
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fqsn = '.'.join([key, providername])
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fqsns.append(fqsn)
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# NOTE: for now we use the first symbol in the set as the "key"
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# for the overlay of feeds on the chart.
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group_key = fqsns[0]
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group_key: tuple[str] = tuple(fqsns)
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all_linked = self.get_chart_symbol(group_key)
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all_linked = self.get_chart_symbols(group_key)
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order_mode_started = trio.Event()
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if not self.vbox.isEmpty():
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@ -245,7 +234,6 @@ class GodWidget(QWidget):
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self._root_n.start_soon(
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display_symbol_data,
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self,
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providername,
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fqsns,
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loglevel,
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order_mode_started,
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@ -253,8 +241,8 @@ class GodWidget(QWidget):
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# self.vbox.addWidget(hist_charts)
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self.vbox.addWidget(rt_charts)
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self.set_chart_symbol(
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fqsn,
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self.set_chart_symbols(
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group_key,
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(hist_charts, rt_charts),
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)
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@ -568,12 +556,10 @@ class LinkedSplits(QWidget):
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# be no distinction since we will have multiple symbols per
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# view as part of "aggregate feeds".
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self.chart = self.add_plot(
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name=symbol.key,
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name=symbol.fqsn,
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shm=shm,
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style=style,
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_is_main=True,
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sidepane=sidepane,
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)
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# add crosshair graphic
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@ -615,12 +601,13 @@ class LinkedSplits(QWidget):
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# TODO: we gotta possibly assign this back
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# to the last subplot on removal of some last subplot
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xaxis = DynamicDateAxis(
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None,
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orientation='bottom',
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linkedsplits=self
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)
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axes = {
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'right': PriceAxis(linkedsplits=self, orientation='right'),
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'left': PriceAxis(linkedsplits=self, orientation='left'),
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'right': PriceAxis(None, orientation='right'),
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'left': PriceAxis(None, orientation='left'),
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'bottom': xaxis,
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}
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@ -645,6 +632,11 @@ class LinkedSplits(QWidget):
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axisItems=axes,
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**cpw_kwargs,
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)
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# TODO: wow i can't believe how confusing garbage all this axes
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# stuff iss..
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for axis in axes.values():
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axis.pi = cpw.plotItem
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cpw.hideAxis('left')
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cpw.hideAxis('bottom')
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@ -860,7 +852,12 @@ class ChartPlotWidget(pg.PlotWidget):
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# source of our custom interactions
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self.cv = cv = self.mk_vb(name)
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pi = pgo.PlotItem(viewBox=cv, **kwargs)
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pi = pgo.PlotItem(
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viewBox=cv,
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name=name,
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**kwargs,
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)
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pi.chart_widget = self
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super().__init__(
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background=hcolor(view_color),
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viewBox=cv,
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@ -913,18 +910,20 @@ class ChartPlotWidget(pg.PlotWidget):
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self._on_screen: bool = False
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def resume_all_feeds(self):
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try:
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for feed in self._feeds.values():
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for flume in feed.flumes.values():
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self.linked.godwidget._root_n.start_soon(feed.resume)
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except RuntimeError:
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# TODO: cancel the qtractor runtime here?
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raise
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...
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# try:
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# for feed in self._feeds.values():
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# for flume in feed.flumes.values():
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# self.linked.godwidget._root_n.start_soon(flume.resume)
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# except RuntimeError:
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# # TODO: cancel the qtractor runtime here?
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# raise
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def pause_all_feeds(self):
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for feed in self._feeds.values():
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for flume in feed.flumes.values():
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self.linked.godwidget._root_n.start_soon(feed.pause)
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...
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# for feed in self._feeds.values():
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# for flume in feed.flumes.values():
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# self.linked.godwidget._root_n.start_soon(flume.pause)
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@property
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def view(self) -> ChartView:
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@ -1116,43 +1115,6 @@ class ChartPlotWidget(pg.PlotWidget):
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padding=0,
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)
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def draw_ohlc(
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self,
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name: str,
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shm: ShmArray,
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array_key: Optional[str] = None,
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) -> (pg.GraphicsObject, str):
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'''
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Draw OHLC datums to chart.
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'''
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graphics = BarItems(
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self.linked,
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self.plotItem,
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pen_color=self.pen_color,
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name=name,
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)
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# adds all bar/candle graphics objects for each data point in
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# the np array buffer to be drawn on next render cycle
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self.plotItem.addItem(graphics)
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data_key = array_key or name
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self._flows[data_key] = Flow(
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name=name,
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plot=self.plotItem,
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_shm=shm,
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is_ohlc=True,
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graphics=graphics,
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)
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self._add_sticky(name, bg_color='davies')
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return graphics, data_key
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def overlay_plotitem(
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self,
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name: str,
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@ -1172,8 +1134,8 @@ class ChartPlotWidget(pg.PlotWidget):
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raise ValueError(f'``axis_side``` must be in {allowed_sides}')
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yaxis = PriceAxis(
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plotitem=None,
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orientation=axis_side,
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linkedsplits=self.linked,
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**axis_kwargs,
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)
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@ -1188,6 +1150,8 @@ class ChartPlotWidget(pg.PlotWidget):
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},
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default_axes=[],
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)
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yaxis.pi = pi
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pi.chart_widget = self
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pi.hideButtons()
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# compose this new plot's graphics with the current chart's
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@ -1231,22 +1195,40 @@ class ChartPlotWidget(pg.PlotWidget):
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add_label: bool = True,
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pi: Optional[pg.PlotItem] = None,
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step_mode: bool = False,
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is_ohlc: bool = False,
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add_sticky: None | str = 'right',
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**pdi_kwargs,
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**graphics_kwargs,
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) -> (pg.PlotDataItem, str):
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) -> tuple[
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pg.GraphicsObject,
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str,
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]:
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'''
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Draw a "curve" (line plot graphics) for the provided data in
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the input shm array ``shm``.
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'''
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color = color or self.pen_color or 'default_light'
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pdi_kwargs.update({
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'color': color
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})
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# graphics_kwargs.update({
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# 'color': color
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# })
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data_key = array_key or name
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pi = pi or self.plotItem
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if is_ohlc:
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graphics = BarItems(
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linked=self.linked,
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plotitem=pi,
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# pen_color=self.pen_color,
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color=color,
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name=name,
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**graphics_kwargs,
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)
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else:
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curve_type = {
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None: Curve,
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'step': StepCurve,
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@ -1254,20 +1236,19 @@ class ChartPlotWidget(pg.PlotWidget):
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# 'bars': BarsItems
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}['step' if step_mode else None]
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curve = curve_type(
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graphics = curve_type(
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name=name,
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**pdi_kwargs,
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color=color,
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**graphics_kwargs,
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)
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pi = pi or self.plotItem
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self._flows[data_key] = Flow(
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name=name,
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plot=pi,
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_shm=shm,
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is_ohlc=False,
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is_ohlc=is_ohlc,
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# register curve graphics with this flow
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graphics=curve,
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graphics=graphics,
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)
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# TODO: this probably needs its own method?
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@ -1278,12 +1259,41 @@ class ChartPlotWidget(pg.PlotWidget):
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f'{overlay} must be from `.plotitem_overlay()`'
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)
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pi = overlay
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else:
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if add_sticky:
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axis = pi.getAxis(add_sticky)
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if pi.name not in axis._stickies:
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if pi is not self.plotItem:
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overlay = self.pi_overlay
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assert pi in overlay.overlays
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overlay_axis = overlay.get_axis(
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pi,
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add_sticky,
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)
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assert overlay_axis is axis
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# TODO: UGH! just make this not here! we should
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# be making the sticky from code which has access
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# to the ``Symbol`` instance..
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# if the sticky is for our symbol
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# use the tick size precision for display
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name = name or pi.name
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sym = self.linked.symbol
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digits = None
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if name == sym.key:
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digits = sym.tick_size_digits
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# anchor_at = ('top', 'left')
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# TODO: something instead of stickies for overlays
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# (we need something that avoids clutter on x-axis).
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self._add_sticky(name, bg_color=color)
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axis.add_sticky(
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pi=pi,
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bg_color=color,
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digits=digits,
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)
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# NOTE: this is more or less the RENDER call that tells Qt to
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# start showing the generated graphics-curves. This is kind of
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@ -1294,38 +1304,30 @@ class ChartPlotWidget(pg.PlotWidget):
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# the next render cycle; just note a lot of the real-time
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# updates are implicit and require a bit of digging to
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# understand.
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pi.addItem(curve)
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pi.addItem(graphics)
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return curve, data_key
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return graphics, data_key
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# TODO: make this a ctx mngr
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def _add_sticky(
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def draw_ohlc(
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self,
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name: str,
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bg_color='bracket',
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shm: ShmArray,
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) -> YAxisLabel:
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array_key: Optional[str] = None,
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**draw_curve_kwargs,
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# if the sticky is for our symbol
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# use the tick size precision for display
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sym = self.linked.symbol
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if name == sym.key:
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digits = sym.tick_size_digits
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else:
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digits = 2
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) -> (pg.GraphicsObject, str):
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'''
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Draw OHLC datums to chart.
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# add y-axis "last" value label
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last = self._ysticks[name] = YAxisLabel(
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chart=self,
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# parent=self.getAxis('right'),
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parent=self.pi_overlay.get_axis(self.plotItem, 'right'),
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# TODO: pass this from symbol data
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digits=digits,
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opacity=1,
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bg_color=bg_color,
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'''
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return self.draw_curve(
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name=name,
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shm=shm,
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array_key=array_key,
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is_ohlc=True,
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**draw_curve_kwargs,
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)
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return last
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def update_graphics_from_flow(
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self,
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