Factor signalling api into new module
Tyler Goodlet
parent
cc4b51cb17
commit
d993147f78
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@ -15,17 +15,16 @@ from ._graphics import CrossHairItem, ChartType
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from ._style import _xaxis_at
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from ._source import Symbol, ohlc_zeros
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from .quantdom.charts import CenteredTextItem
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# from .quantdom.base import Quotes
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# from .quantdom.const import ChartType
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from .quantdom.portfolio import Order, Portfolio
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# margins
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CHART_MARGINS = (0, 0, 10, 3)
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class Chart(QtGui.QWidget):
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class ChartSpace(QtGui.QWidget):
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"""High level widget which contains layouts for organizing
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lower level charts as well as other widgets used to control
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or modify them.
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"""
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def __init__(self, parent=None):
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super().__init__(parent)
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self.v_layout = QtGui.QVBoxLayout(self)
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@ -69,7 +68,7 @@ class Chart(QtGui.QWidget):
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"""Load a new contract into the charting app.
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"""
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# XXX: let's see if this causes mem problems
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self.chart = self._plot_cache.setdefault(symbol, SplitterPlots())
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self.chart = self._plot_cache.setdefault(symbol, LinkedSplitCharts())
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s = Symbol(key=symbol)
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# remove any existing plots
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@ -85,7 +84,7 @@ class Chart(QtGui.QWidget):
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# self.chart.add_signals()
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class SplitterPlots(QtGui.QWidget):
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class LinkedSplitCharts(QtGui.QWidget):
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"""Widget that holds a price chart plus indicators separated by splitters.
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"""
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@ -120,27 +119,6 @@ class SplitterPlots(QtGui.QWidget):
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self.layout.addWidget(self.splitter)
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def _show_text_signals(self, lbar, rbar):
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signals = [
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sig
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for sig in self.signals_text_items[lbar:rbar]
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if isinstance(sig, CenteredTextItem)
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]
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if len(signals) <= 50:
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for sig in signals:
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sig.show()
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else:
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for sig in signals:
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sig.hide()
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def _remove_signals(self):
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self.chart.removeItem(self.signals_group_arrow)
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self.chart.removeItem(self.signals_group_text)
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del self.signals_text_items
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del self.signals_group_arrow
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del self.signals_group_text
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self.signals_visible = False
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def _update_sizes(self):
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min_h_ind = int(self.height() * 0.2 / len(self.indicators))
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sizes = [int(self.height() * 0.8)]
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@ -212,60 +190,6 @@ class SplitterPlots(QtGui.QWidget):
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)
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self.chart.addItem(ch)
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def add_signals(self):
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self.signals_group_text = QtGui.QGraphicsItemGroup()
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self.signals_group_arrow = QtGui.QGraphicsItemGroup()
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self.signals_text_items = np.empty(len(Quotes), dtype=object)
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for p in Portfolio.positions:
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x, price = p.id_bar_open, p.open_price
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if p.type == Order.BUY:
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y = Quotes[x].low * 0.99
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pg.ArrowItem(
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parent=self.signals_group_arrow,
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pos=(x, y),
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pen=self.long_pen,
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brush=self.long_brush,
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angle=90,
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headLen=12,
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tipAngle=50,
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)
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text_sig = CenteredTextItem(
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parent=self.signals_group_text,
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pos=(x, y),
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pen=self.long_pen,
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brush=self.long_brush,
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text=('Buy at {:.%df}' % self.digits).format(price),
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valign=QtCore.Qt.AlignBottom,
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)
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text_sig.hide()
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else:
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y = Quotes[x].high * 1.01
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pg.ArrowItem(
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parent=self.signals_group_arrow,
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pos=(x, y),
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pen=self.short_pen,
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brush=self.short_brush,
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angle=-90,
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headLen=12,
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tipAngle=50,
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)
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text_sig = CenteredTextItem(
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parent=self.signals_group_text,
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pos=(x, y),
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pen=self.short_pen,
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brush=self.short_brush,
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text=('Sell at {:.%df}' % self.digits).format(price),
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valign=QtCore.Qt.AlignTop,
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)
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text_sig.hide()
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self.signals_text_items[x] = text_sig
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self.chart.addItem(self.signals_group_arrow)
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self.chart.addItem(self.signals_group_text)
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self.signals_visible = True
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_min_points_to_show = 15
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_min_bars_in_view = 10
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@ -299,6 +223,9 @@ class ChartPlotWidget(pg.PlotWidget):
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"""Configure chart display settings.
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"""
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super().__init__(**kwargs)
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# XXX: label setting doesn't seem to work?
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# likely custom graphics need special handling
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# label = pg.LabelItem(justify='left')
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# self.addItem(label)
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# label.setText("Yo yoyo")
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@ -567,4 +494,6 @@ def main(symbol):
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# LOL this clearly isn't catching edge cases
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chart._update_yrange_limits()
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run_qtrio(_main, (), Chart)
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await trio.sleep_forever()
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run_qtrio(_main, (), ChartSpace)
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@ -0,0 +1,98 @@
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"""
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Signalling graphics and APIs.
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WARNING: this code likely doesn't work at all (yet)
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since it was copied from another class that shouldn't
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have had it.
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"""
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import numpy as np
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import pyqtgraph as pg
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from PyQt5 import QtCore, QtGui
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from .quantdom.charts import CenteredTextItem
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from .quantdom.base import Quotes
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from .quantdom.portfolio import Order, Portfolio
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class SignallingApi(object):
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def __init__(self, plotgroup):
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self.plotgroup = plotgroup
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self.chart = plotgroup.chart
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def _show_text_signals(self, lbar, rbar):
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signals = [
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sig
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for sig in self.signals_text_items[lbar:rbar]
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if isinstance(sig, CenteredTextItem)
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]
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if len(signals) <= 50:
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for sig in signals:
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sig.show()
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else:
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for sig in signals:
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sig.hide()
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def _remove_signals(self):
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self.chart.removeItem(self.signals_group_arrow)
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self.chart.removeItem(self.signals_group_text)
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del self.signals_text_items
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del self.signals_group_arrow
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del self.signals_group_text
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self.signals_visible = False
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def add_signals(self):
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self.signals_group_text = QtGui.QGraphicsItemGroup()
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self.signals_group_arrow = QtGui.QGraphicsItemGroup()
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self.signals_text_items = np.empty(len(Quotes), dtype=object)
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for p in Portfolio.positions:
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x, price = p.id_bar_open, p.open_price
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if p.type == Order.BUY:
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y = Quotes[x].low * 0.99
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pg.ArrowItem(
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parent=self.signals_group_arrow,
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pos=(x, y),
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pen=self.plotgroup.long_pen,
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brush=self.plotgroup.long_brush,
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angle=90,
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headLen=12,
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tipAngle=50,
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)
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text_sig = CenteredTextItem(
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parent=self.signals_group_text,
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pos=(x, y),
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pen=self.plotgroup.long_pen,
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brush=self.plotgroup.long_brush,
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text=(
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'Buy at {:.%df}' % self.plotgroup.digits).format(
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price),
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valign=QtCore.Qt.AlignBottom,
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)
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text_sig.hide()
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else:
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y = Quotes[x].high * 1.01
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pg.ArrowItem(
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parent=self.signals_group_arrow,
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pos=(x, y),
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pen=self.plotgroup.short_pen,
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brush=self.plotgroup.short_brush,
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angle=-90,
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headLen=12,
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tipAngle=50,
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)
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text_sig = CenteredTextItem(
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parent=self.signals_group_text,
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pos=(x, y),
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pen=self.plotgroup.short_pen,
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brush=self.plotgroup.short_brush,
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text=('Sell at {:.%df}' % self.plotgroup.digits).format(
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price),
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valign=QtCore.Qt.AlignTop,
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)
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text_sig.hide()
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self.signals_text_items[x] = text_sig
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self.chart.addItem(self.signals_group_arrow)
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self.chart.addItem(self.signals_group_text)
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self.signals_visible = True
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