118 lines
4.1 KiB
Python
118 lines
4.1 KiB
Python
# piker: trading gear for hackers
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# Copyright (C) 2018-present Tyler Goodlet (in stewardship of piker0)
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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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 (
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QtCore,
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QtWidgets,
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)
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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 = QtWidgets.QGraphicsItemGroup()
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self.signals_group_arrow = QtWidgets.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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