Support (sub)plot names separate from data array keys
Tyler Goodlet
parent
65158b8c64
commit
825680b8c6
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@ -299,13 +299,17 @@ class LinkedSplits(QtWidgets.QWidget):
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def set_split_sizes(
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self,
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prop: float = 0.375 # proportion allocated to consumer subcharts
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) -> None:
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"""Set the proportion of space allocated for linked subcharts.
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"""
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'''Set the proportion of space allocated for linked subcharts.
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'''
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major = 1 - prop
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min_h_ind = int((self.height() * prop) / len(self.subplots))
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sizes = [int(self.height() * major)]
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sizes.extend([min_h_ind] * len(self.subplots))
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self.splitter.setSizes(sizes) # , int(self.height()*0.2)
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def focus(self) -> None:
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@ -318,9 +322,12 @@ class LinkedSplits(QtWidgets.QWidget):
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def plot_ohlc_main(
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self,
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symbol: Symbol,
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array: np.ndarray,
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style: str = 'bar',
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) -> 'ChartPlotWidget':
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"""Start up and show main (price) chart and all linked subcharts.
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@ -352,17 +359,23 @@ class LinkedSplits(QtWidgets.QWidget):
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def add_plot(
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self,
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name: str,
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array: np.ndarray,
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xaxis: DynamicDateAxis = None,
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array_key: Optional[str] = None,
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# xaxis: Optional[DynamicDateAxis] = None,
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style: str = 'line',
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_is_main: bool = False,
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**cpw_kwargs,
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) -> 'ChartPlotWidget':
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"""Add (sub)plots to chart widget by name.
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'''Add (sub)plots to chart widget by name.
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If ``name`` == ``"main"`` the chart will be the the primary view.
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"""
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'''
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if self.chart is None and not _is_main:
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raise RuntimeError(
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"A main plot must be created first with `.plot_ohlc_main()`")
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@ -372,17 +385,25 @@ class LinkedSplits(QtWidgets.QWidget):
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cv.linkedsplits = self
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# use "indicator axis" by default
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if xaxis is None:
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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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orientation='bottom',
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linkedsplits=self
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)
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if self.xaxis:
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self.xaxis.hide()
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self.xaxis = xaxis
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cpw = ChartPlotWidget(
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# this name will be used to register the primary
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# graphics curve managed by the subchart
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name=name,
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data_key=array_key or name,
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array=array,
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parent=self.splitter,
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@ -395,7 +416,6 @@ class LinkedSplits(QtWidgets.QWidget):
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viewBox=cv,
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**cpw_kwargs,
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)
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print(f'xaxis ps: {xaxis.pos()}')
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# give viewbox as reference to chart
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# allowing for kb controls and interactions on **this** widget
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@ -416,10 +436,10 @@ class LinkedSplits(QtWidgets.QWidget):
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# draw curve graphics
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if style == 'bar':
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cpw.draw_ohlc(name, array)
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cpw.draw_ohlc(name, array, array_key=array_key)
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elif style == 'line':
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cpw.draw_curve(name, array)
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cpw.draw_curve(name, array, array_key=array_key)
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else:
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raise ValueError(f"Chart style {style} is currently unsupported")
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@ -428,11 +448,12 @@ class LinkedSplits(QtWidgets.QWidget):
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# track by name
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self.subplots[name] = cpw
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# XXX: we need this right?
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self.splitter.addWidget(cpw)
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# scale split regions
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self.set_split_sizes()
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# XXX: we need this right?
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# self.splitter.addWidget(cpw)
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else:
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assert style == 'bar', 'main chart must be OHLC'
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@ -465,9 +486,11 @@ class ChartPlotWidget(pg.PlotWidget):
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def __init__(
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self,
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# the data view we generate graphics from
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# the "data view" we generate graphics from
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name: str,
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array: np.ndarray,
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data_key: str,
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linkedsplits: LinkedSplits,
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view_color: str = 'papas_special',
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@ -491,6 +514,7 @@ class ChartPlotWidget(pg.PlotWidget):
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**kwargs
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)
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self.name = name
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self.data_key = data_key
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self.linked = linkedsplits
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# scene-local placeholder for book graphics
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@ -618,8 +642,12 @@ class ChartPlotWidget(pg.PlotWidget):
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def draw_ohlc(
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self,
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name: str,
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data: np.ndarray,
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array_key: Optional[str] = None,
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) -> pg.GraphicsObject:
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"""
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Draw OHLC datums to chart.
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@ -637,7 +665,8 @@ class ChartPlotWidget(pg.PlotWidget):
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# draw after to allow self.scene() to work...
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graphics.draw_from_data(data)
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self._graphics[name] = graphics
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data_key = array_key or name
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self._graphics[data_key] = graphics
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self.linked.cursor.contents_labels.add_label(
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self,
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@ -652,12 +681,17 @@ class ChartPlotWidget(pg.PlotWidget):
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def draw_curve(
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self,
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name: str,
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data: np.ndarray,
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array_key: Optional[str] = None,
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overlay: bool = False,
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color: str = 'default_light',
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add_label: bool = True,
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**pdi_kwargs,
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) -> pg.PlotDataItem:
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"""Draw a "curve" (line plot graphics) for the provided data in
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the input array ``data``.
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@ -668,10 +702,11 @@ class ChartPlotWidget(pg.PlotWidget):
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}
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pdi_kwargs.update(_pdi_defaults)
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data_key = array_key or name
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# curve = pg.PlotDataItem(
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# curve = pg.PlotCurveItem(
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curve = FastAppendCurve(
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y=data[name],
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y=data[data_key],
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x=data['index'],
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# antialias=True,
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name=name,
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@ -730,8 +765,10 @@ class ChartPlotWidget(pg.PlotWidget):
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def _add_sticky(
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self,
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name: str,
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bg_color='bracket',
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) -> YAxisLabel:
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# if the sticky is for our symbol
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@ -769,18 +806,23 @@ class ChartPlotWidget(pg.PlotWidget):
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def update_curve_from_array(
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self,
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name: str,
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array: np.ndarray,
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array_key: Optional[str] = None,
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**kwargs,
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) -> pg.GraphicsObject:
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"""Update the named internal graphics from ``array``.
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"""
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data_key = array_key or name
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if name not in self._overlays:
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self._arrays['ohlc'] = array
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else:
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self._arrays[name] = array
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self._arrays[data_key] = array
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curve = self._graphics[name]
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@ -790,7 +832,7 @@ class ChartPlotWidget(pg.PlotWidget):
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# one place to dig around this might be the `QBackingStore`
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# https://doc.qt.io/qt-5/qbackingstore.html
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# curve.setData(y=array[name], x=array['index'], **kwargs)
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curve.update_from_array(x=array['index'], y=array[name], **kwargs)
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curve.update_from_array(x=array['index'], y=array[data_key], **kwargs)
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return curve
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@ -1061,8 +1103,7 @@ async def chart_from_quotes(
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if wap_in_history:
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# update vwap overlay line
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chart.update_curve_from_array(
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'bar_wap', ohlcv.array)
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chart.update_curve_from_array('bar_wap', ohlcv.array)
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# l1 book events
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# throttle the book graphics updates at a lower rate
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@ -1167,9 +1208,9 @@ async def spawn_fsps(
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# Currently we spawn an actor per fsp chain but
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# likely we'll want to pool them eventually to
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# scale horizonatlly once cores are used up.
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for fsp_func_name, conf in fsps.items():
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for display_name, conf in fsps.items():
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display_name = f'fsp.{fsp_func_name}'
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fsp_func_name = conf['fsp_func_name']
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# TODO: load function here and introspect
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# return stream type(s)
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@ -1177,7 +1218,7 @@ async def spawn_fsps(
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# TODO: should `index` be a required internal field?
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fsp_dtype = np.dtype([('index', int), (fsp_func_name, float)])
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key = f'{sym}.' + display_name
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key = f'{sym}.fsp.' + display_name
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# this is all sync currently
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shm, opened = maybe_open_shm_array(
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@ -1195,7 +1236,7 @@ async def spawn_fsps(
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portal = await n.start_actor(
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enable_modules=['piker.fsp'],
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name=display_name,
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name='fsp.' + display_name,
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)
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# init async
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@ -1234,7 +1275,7 @@ async def run_fsp(
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config map.
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"""
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done = linkedsplits.window().status_bar.open_status(
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f'loading {display_name}..',
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f'loading fsp, {display_name}..',
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group_key=group_status_key,
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)
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@ -1270,9 +1311,11 @@ async def run_fsp(
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else:
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chart = linkedsplits.add_plot(
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name=fsp_func_name,
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name=display_name,
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array=shm.array,
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array_key=conf['fsp_func_name'],
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# curve by default
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ohlc=False,
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@ -1294,14 +1337,19 @@ async def run_fsp(
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# read from last calculated value
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array = shm.array
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# XXX: fsp func names are unique meaning we don't have
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# duplicates of the underlying data even if multiple
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# sub-charts reference it under different 'named charts'.
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value = array[fsp_func_name][-1]
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last_val_sticky.update_from_data(-1, value)
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chart.linked.focus()
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# works also for overlays in which case data is looked up from
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# internal chart array set....
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chart.update_curve_from_array(fsp_func_name, shm.array)
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chart.update_curve_from_array(display_name, shm.array, array_key=fsp_func_name)
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# TODO: figure out if we can roll our own `FillToThreshold` to
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# get brush filled polygons for OS/OB conditions.
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@ -1365,7 +1413,11 @@ async def run_fsp(
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last_val_sticky.update_from_data(-1, value)
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# update graphics
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chart.update_curve_from_array(fsp_func_name, array)
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chart.update_curve_from_array(
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display_name,
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array,
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array_key=fsp_func_name,
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)
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# set time of last graphics update
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last = now
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@ -1420,7 +1472,11 @@ async def check_for_new_bars(feed, ohlcv, linkedsplits):
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)
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for name, chart in linkedsplits.subplots.items():
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chart.update_curve_from_array(chart.name, chart._shm.array)
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chart.update_curve_from_array(
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chart.name,
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chart._shm.array,
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array_key=chart.data_key
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)
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# shift the view if in follow mode
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price_chart.increment_view()
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@ -1510,6 +1566,14 @@ async def display_symbol_data(
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# TODO: eventually we'll support some kind of n-compose syntax
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fsp_conf = {
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'rsi': {
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'fsp_func_name': 'rsi',
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'period': 14,
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'chart_kwargs': {
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'static_yrange': (0, 100),
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},
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},
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'rsi2': {
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'fsp_func_name': 'rsi',
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'period': 14,
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'chart_kwargs': {
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'static_yrange': (0, 100),
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@ -1532,6 +1596,7 @@ async def display_symbol_data(
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else:
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fsp_conf.update({
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'vwap': {
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'fsp_func_name': 'vwap',
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'overlay': True,
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'anchor': 'session',
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},
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@ -1723,7 +1788,7 @@ async def _async_main(
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'allocator': {
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'key': '**allocator**:',
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'type': 'select',
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'default_value': ['$ size', '% of port',],
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'default_value': ['$ size', '% of port', '# shares'],
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},
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'dollar_size': {
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'key': '**$size**:',
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