本文整理汇总了Python中pyqtgraph.ArrowItem方法的典型用法代码示例。如果您正苦于以下问题：Python pyqtgraph.ArrowItem方法的具体用法？Python pyqtgraph.ArrowItem怎么用？Python pyqtgraph.ArrowItem使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类pyqtgraph的用法示例。
在下文中一共展示了pyqtgraph.ArrowItem方法的14个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: plotMark
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plotMark(self):
"""显示开平仓信号"""
# 检查是否有数据
if len(self.datas)==0:
return
for arrow in self.arrows:
self.pwKL.removeItem(arrow)
# 画买卖信号
for i in range(len(self.listSig)):
# 无信号
if self.listSig[i] == 0:
continue
# 买信号
elif self.listSig[i] > 0:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['low']), angle=90, brush=(255, 0, 0))
# 卖信号
elif self.listSig[i] < 0:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['high']), angle=-90, brush=(0, 255, 0))
self.pwKL.addItem(arrow)
self.arrows.append(arrow)
#---------------------------------------------------------------------- 示例2: initplotKline
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def initplotKline(self):
"""Kline"""
self.pw2 = pg.PlotWidget(name='Plot2') # K线图
self.vbl_2.addWidget(self.pw2)
self.pw2.setDownsampling(mode='peak')
self.pw2.setClipToView(True)
self.curve5 = self.pw2.plot()
self.curve6 = self.pw2.plot()
self.candle = self.CandlestickItem(self.listBar)
self.pw2.addItem(self.candle)
## Draw an arrowhead next to the text box
# self.arrow = pg.ArrowItem()
# self.pw2.addItem(self.arrow)
#---------------------------------------------------------------------- 示例3: plotText
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plotText(self):
lenClose = len(self.listClose)
if lenClose >= 5: # Fractal Signal
if self.listClose[-1] > self.listClose[-2] and self.listClose[-3] > self.listClose[-2] and self.listClose[-4] > self.listClose[-2] and self.listClose[-5] > self.listClose[-2] and self.listfastEMA[-1] > self.listslowEMA[-1]:
## Draw an arrowhead next to the text box
# self.pw2.removeItem(self.arrow)
self.arrow = pg.ArrowItem(pos=(lenClose-1, self.listLow[-1]), angle=90, brush=(255, 0, 0))
self.pw2.addItem(self.arrow)
elif self.listClose[-1] < self.listClose[-2] and self.listClose[-3] < self.listClose[-2] and self.listClose[-4] < self.listClose[-2] and self.listClose[-5] < self.listClose[-2] and self.listfastEMA[-1] < self.listslowEMA[-1]:
## Draw an arrowhead next to the text box
# self.pw2.removeItem(self.arrow)
self.arrow = pg.ArrowItem(pos=(lenClose-1, self.listHigh[-1]), angle=-90, brush=(0, 255, 0))
self.pw2.addItem(self.arrow)
#---------------------------------------------------------------------- 示例4: plotText
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plotText(self):
"""开平仓信号"""
lenClose = len(self.listClose)
if lenClose >= 5: # Fractal Signal
if self.listClose[-1] > self.listClose[-2] and self.listClose[-3] > self.listClose[-2] and self.listClose[-4] > self.listClose[-2] and self.listClose[-5] > self.listClose[-2] and self.listfastEMA[-1] > self.listslowEMA[-1]:
## Draw an arrowhead next to the text box
# self.pw2.removeItem(self.arrow)
self.arrow = pg.ArrowItem(pos=(lenClose-1, self.listLow[-1]), angle=90, brush=(255, 0, 0))
self.pw2.addItem(self.arrow)
elif self.listClose[-1] < self.listClose[-2] and self.listClose[-3] < self.listClose[-2] and self.listClose[-4] < self.listClose[-2] and self.listClose[-5] < self.listClose[-2] and self.listfastEMA[-1] < self.listslowEMA[-1]:
## Draw an arrowhead next to the text box
# self.pw2.removeItem(self.arrow)
self.arrow = pg.ArrowItem(pos=(lenClose-1, self.listHigh[-1]), angle=-90, brush=(0, 255, 0))
self.pw2.addItem(self.arrow)
#---------------------------------------------------------------------- 示例5: plotIndex_LIMIT
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plotIndex_LIMIT (self):
"""画指标"""
# 检查是否有数据
if len(self.KLINE_SHORT_TERM_LIST_LIMIT)==0 :
self.refresh()
return
for arrow in self.KLINE_SHORT_TERM_LIST_LIMIT_arrows:
self.pwKL.removeItem(arrow)
for curves in self.KLINE_SHORT_TERM_LIST_LIMIT_curves:
self.pwKL.removeItem(curves)
for i in range(len(self.KLINE_SHORT_TERM_LIST_LIMIT)):
if self.KLINE_SHORT_TERM_LIST_LIMIT[i] == 1:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['low']), size=7,tipAngle=55,tailLen=3,tailWidth=4, angle=90, brush=(34, 139, 34),pen=({'color': "228B22", 'width': 1}))
self.pwKL.addItem(arrow)
self.KLINE_SHORT_TERM_LIST_LIMIT_arrows.append(arrow)
if self.KLINE_SHORT_TERM_LIST_LIMIT[i] == 2:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['high']),size=7,tipAngle=55,tailLen=3,tailWidth=4 ,angle=-90, brush=(34, 139, 34),pen=({'color': "228B22", 'width': 1}))
self.pwKL.addItem(arrow)
self.KLINE_SHORT_TERM_LIST_LIMIT_arrows.append(arrow)
last_x=-1 #上一个x
last_y=-1 #上一个y
last_v=-1
for i in range(len(self.KLINE_SHORT_TERM_LIST_LIMIT)):
if self.KLINE_SHORT_TERM_LIST_LIMIT[i] != 0 :
if last_x!=-1 and last_y!=-1 and last_v!=self.KLINE_SHORT_TERM_LIST_LIMIT[i] and\
((last_v == 1 and self.KLINE_SHORT_TERM_LIST_LIMIT[i] == 2) and self.KLINE_LOW[last_x]<self.KLINE_HIGH[i]) or\
((last_v == 2 and self.KLINE_SHORT_TERM_LIST_LIMIT[i] == 1) and self.KLINE_HIGH[last_x]>self.KLINE_LOW[i]):
curve = pg.PlotCurveItem(x=np.array([last_x,i]),y=np.array([last_y,self.datas[i]['low'] if self.KLINE_SHORT_TERM_LIST_LIMIT[i]==1 else self.datas[i]['high']]),name='duo',pen=({'color': "228B22", 'width': 1}))
self.pwKL.addItem(curve)
self.KLINE_SHORT_TERM_LIST_LIMIT_curves.append(curve)
last_x =i
if self.KLINE_SHORT_TERM_LIST_LIMIT[i] ==1 :
last_y=self.datas[i]['low']
elif self.KLINE_SHORT_TERM_LIST_LIMIT[i] ==2 :
last_y=self.datas[i]['high']
last_v=self.KLINE_SHORT_TERM_LIST_LIMIT[i]
#---------------------------------------------------------------------- 示例6: plotIndex_ALL
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plotIndex_ALL (self):
"""画指标"""
# 检查是否有数据
if len(self.KLINE_SHORT_TERM_LIST_ALL)==0 :
self.refresh()
return
for arrow in self.KLINE_SHORT_TERM_LIST_ALL_arrows:
self.pwKL.removeItem(arrow)
for curves in self.KLINE_SHORT_TERM_LIST_ALL_curves:
self.pwKL.removeItem(curves)
for i in range(len(self.KLINE_SHORT_TERM_LIST_ALL)):
if self.KLINE_SHORT_TERM_LIST_ALL[i] == 1:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['low']), size=7,tipAngle=55,tailLen=3,tailWidth=4, angle=90, brush=(225, 0, 225),pen=({'color': "FF00FF", 'width': 1}))
self.pwKL.addItem(arrow)
self.KLINE_SHORT_TERM_LIST_ALL_arrows.append(arrow)
if self.KLINE_SHORT_TERM_LIST_ALL[i] == 2:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['high']),size=7,tipAngle=55,tailLen=3,tailWidth=4 ,angle=-90, brush=(225, 0, 225),pen=({'color': "FF00FF", 'width': 1}))
self.pwKL.addItem(arrow)
self.KLINE_SHORT_TERM_LIST_ALL_arrows.append(arrow)
last_x=-1 #上一个x
last_y=-1 #上一个y
last_v=-1
for i in range(len(self.KLINE_SHORT_TERM_LIST_ALL)):
if self.KLINE_SHORT_TERM_LIST_ALL[i] != 0 :
if last_x!=- 1 and last_y!=-1 and \
((last_v == 1 and self.KLINE_SHORT_TERM_LIST_ALL[i] == 2) and self.KLINE_LOW[last_x]<self.KLINE_HIGH[i]) or \
((last_v == 2 and self.KLINE_SHORT_TERM_LIST_ALL[i] == 1) and self.KLINE_HIGH[last_x]>self.KLINE_LOW[i]) or \
((last_v == 1 and self.KLINE_SHORT_TERM_LIST_ALL[i] == 1)) or \
((last_v == 2 and self.KLINE_SHORT_TERM_LIST_ALL[i] == 2)) :
curve = pg.PlotCurveItem(x=np.array([last_x,i]),y=np.array([last_y,self.datas[i]['low'] if self.KLINE_SHORT_TERM_LIST_ALL[i]==1 else self.datas[i]['high']]),name='duo',pen=({'color': "FF00FF", 'width': 1}))
self.pwKL.addItem(curve)
self.KLINE_SHORT_TERM_LIST_ALL_curves.append(curve)
last_x =i
if self.KLINE_SHORT_TERM_LIST_ALL[i] ==1 :
last_y=self.datas[i]['low']
elif self.KLINE_SHORT_TERM_LIST_ALL[i] ==2 :
last_y=self.datas[i]['high']
last_v=self.KLINE_SHORT_TERM_LIST_ALL[i]
#---------------------------------------------------------------------- 示例7: plotIndex_FIRST
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plotIndex_FIRST (self):
"""画指标"""
# 检查是否有数据
if len(self.KLINE_SHORT_TERM_LIST_FIRST)==0 :
self.refresh()
return
for arrow in self.KLINE_SHORT_TERM_LIST_FIRST_arrows:
self.pwKL.removeItem(arrow)
for curves in self.KLINE_SHORT_TERM_LIST_FIRST_curves:
self.pwKL.removeItem(curves)
for i in range(len(self.KLINE_SHORT_TERM_LIST_FIRST)):
if self.KLINE_SHORT_TERM_LIST_FIRST[i] == 1:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['low']), size=7,tipAngle=55,tailLen=3,tailWidth=4, angle=90, brush=(225, 255, 0),pen=({'color': "FFFF00", 'width': 1}))
self.pwKL.addItem(arrow)
self.KLINE_SHORT_TERM_LIST_FIRST_arrows.append(arrow)
if self.KLINE_SHORT_TERM_LIST_FIRST[i] == 2:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['high']),size=7,tipAngle=55,tailLen=3,tailWidth=4 ,angle=-90, brush=(225, 255, 0),pen=({'color': "FFFF00", 'width': 1}))
self.pwKL.addItem(arrow)
self.KLINE_SHORT_TERM_LIST_FIRST_arrows.append(arrow)
last_x=-1 #上一个x
last_y=-1 #上一个y
last_v=-1
for i in range(len(self.KLINE_SHORT_TERM_LIST_FIRST)):
if self.KLINE_SHORT_TERM_LIST_FIRST[i] != 0 :
if last_x!=-1 and last_y!=-1 and last_v!=self.KLINE_SHORT_TERM_LIST_FIRST[i] and\
((last_v == 1 and self.KLINE_SHORT_TERM_LIST_FIRST[i] == 2) and self.KLINE_LOW[last_x]<self.KLINE_HIGH[i]) or\
((last_v == 2 and self.KLINE_SHORT_TERM_LIST_FIRST[i] == 1) and self.KLINE_HIGH[last_x]>self.KLINE_LOW[i]):
curve = pg.PlotCurveItem(x=np.array([last_x,i]),y=np.array([last_y,self.datas[i]['low'] if self.KLINE_SHORT_TERM_LIST_FIRST[i]==1 else self.datas[i]['high']]),name='duo',pen=({'color': "FFFF00", 'width': 1}))
self.pwKL.addItem(curve)
self.KLINE_SHORT_TERM_LIST_FIRST_curves.append(curve)
last_x =i
if self.KLINE_SHORT_TERM_LIST_FIRST[i] ==1 :
last_y=self.datas[i]['low']
elif self.KLINE_SHORT_TERM_LIST_FIRST[i] ==2 :
last_y=self.datas[i]['high']
last_v=self.KLINE_SHORT_TERM_LIST_FIRST[i]
#---------------------------------------------------------------------- 示例8: plot_WAIBAORI
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plot_WAIBAORI(self):
"""画外包日箭头"""
# 检查是否有数据
if len(self.KLINE_WAIBAORI)==0 :
self.refresh()
return
for arrow in self.KLINE_WAI_BAO_RI_arrows:
self.pwKL.removeItem(arrow)
for i in range(len(self.KLINE_WAIBAORI)):
if self.KLINE_WAIBAORI[i] == 1:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['low']-100), size=7,tipAngle=55,tailLen=3,tailWidth=4, angle=90, brush=(255, 255, 0),pen=({'color': "FF0000", 'width': 1}))
self.pwKL.addItem(arrow)
self.KLINE_WAI_BAO_RI_arrows.append(arrow)
#---------------------------------------------------------------------- 示例9: plot_GJR_SELL
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plot_GJR_SELL(self):
"""画攻击日卖出箭头"""
# 检查是否有数据
if len(self.KLINE_GJR_SELL)==0 :
self.refresh()
return
for arrow in self.KLINE_GJR_SELL_arrows:
self.pwKL.removeItem(arrow)
for i in range(len(self.KLINE_GJR_SELL)):
if self.KLINE_GJR_SELL[i] == 1:
arrow = pg.ArrowItem(pos=(i, self.datas[i]['high']+50), size=7,tipAngle=55,tailLen=3,tailWidth=4, angle=-90, brush=("C0FF3E"),pen=({'color': "C0FF3E", 'width': 1}))
self.pwKL.addItem(arrow)
self.KLINE_GJR_SELL_arrows.append(arrow)
#---------------------------------------------------------------------- 示例10: __init__
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def __init__(self, model):
pg.GraphicsWidget.__init__(self)
pg.GraphicsWidgetAnchor.__init__(self)
self.model = model
self.arrow = pg.ArrowItem(
parent=self,
angle=0.,
brush=(0, 0, 0, 180),
pen=(255, 255, 255),
pxMode=True)
self.label = pg.LabelItem(
'Towards Sat.',
justify='right', size='8pt',
parent=self)
self.label.anchor(
itemPos=(1., -1.),
parentPos=(1., 0.))
# self.label.setBrush(pg.mkBrush(255, 255, 255, 180))
# self.label.setFont(QtGui.QFont(
# "Helvetica", weight=QtGui.QFont.DemiBold))
self.orientArrow()
self.model.sigSceneChanged.connect(self.orientArrow)
self.setFlag(self.ItemIgnoresTransformations) 示例11: initplotKline
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def initplotKline(self):
"""Kline"""
s = self.data.index #横坐标值
print "numbers of KLine: ", len(s)
xdict = dict(enumerate(s))
self.__axisTime = MyStringAxis(xdict, orientation='bottom')
self.pw2 = pg.PlotWidget(axisItems={'bottom': self.__axisTime}) # K线图
pw2x = self.pw2.getAxis('bottom')
pw2x.setGrid(150) # 设置默认x轴网格
pw2y = self.pw2.getAxis('left')
pw2y.setGrid(150) # 设置默认y轴网格
self.vbl_1.addWidget(self.pw2)
self.pw2.setMinimumWidth(1500)
self.pw2.setMaximumWidth(1800)
self.pw2.setDownsampling(mode='peak')
self.pw2.setClipToView(True)
self.curve5 = self.pw2.plot()
self.curve6 = self.pw2.plot()
self.candle = self.CandlestickItem(self.listBar)
self.pw2.addItem(self.candle)
## Draw an arrowhead next to the text box
# self.arrow = pg.ArrowItem()
# self.pw2.addItem(self.arrow)
# 从数据库读取一分钟数据画分钟线 示例12: plotMark
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def plotMark(self):
"""显示开平仓信号"""
# 检查是否有数据
if len(self.datas)==0:
return
for arrow in self.arrows:
self.pwKL.removeItem(arrow)
for curve in self.curves:
self.pwKL.removeItem(curve)
# 画买卖信号
lastbk_x=-1 #上一个买开的x
lastbk_y=-1 #上一个买开的y
lastsk_x=-1 #上一个卖开的x
lastsk_y=-1 #上一个卖开的y
for i in range(len(self.listSig_deal_DIRECTION)):
# 无信号
if cmp(self.listSig_deal_DIRECTION[i] , '-')== 0 or cmp(self.listSig_deal_OFFSET[i] , '-') == 0:
continue
# 买开信号
elif cmp(self.listSig_deal_DIRECTION[i] , '多')==0 and cmp(self.listSig_deal_OFFSET[i] , '开仓')==0 :
arrow = pg.ArrowItem(pos=(i, self.datas[i]['low']), size=7,tipAngle=55,tailLen=3,tailWidth=4, angle=90, brush=(255, 0, 0),pen=({'color': "r", 'width': 1}))
lastbk_x = i
lastbk_y = self.datas[i]['close']
# 卖平信号
elif cmp(self.listSig_deal_DIRECTION[i] , '空')==0 and cmp(self.listSig_deal_OFFSET[i] , '平仓')==0 :
arrow = pg.ArrowItem(pos=(i, self.datas[i]['high']),size=7,tipAngle=55,tailLen=3,tailWidth=4 ,angle=-90, brush=(0, 0, 0),pen=({'color': "g", 'width': 1}))
if lastbk_x !=-1:
curve = pg.PlotCurveItem(x=np.array([lastbk_x,i]),y=np.array([lastbk_y,self.datas[i][self.SP_signal]]),name='duo',pen=({'color': "r", 'width': 3}))
self.pwKL.addItem(curve)
self.curves.append(curve)
lastbk_x = -1
# 卖开信号
elif cmp(self.listSig_deal_DIRECTION[i] , '空')==0 and cmp(self.listSig_deal_OFFSET[i] , '开仓')==0 :
arrow = pg.ArrowItem(pos=(i, self.datas[i]['high']),size=7,tipAngle=55,tailLen=3,tailWidth=4,angle=-90, brush=(0, 255, 0),pen=({'color': "g", 'width': 1}))
lastsk_x = i
lastsk_y = self.datas[i]['close']
# 买平信号
elif cmp(self.listSig_deal_DIRECTION[i] , '多')==0 and cmp(self.listSig_deal_OFFSET[i] , '平仓')==0 :
arrow = pg.ArrowItem(pos=(i, self.datas[i]['low']),size=7,tipAngle=55,tailLen=3,tailWidth=4 ,angle=90, brush=(0, 0, 0),pen=({'color': "r", 'width': 1}))
if lastsk_x !=-1:
curve = pg.PlotCurveItem(x=np.array([lastsk_x,i]),y=np.array([lastsk_y,self.datas[i][self.BP_signal]]),pen=({'color': "g", 'width': 3}))
self.pwKL.addItem(curve)
self.curves.append(curve)
lastsk_x = -1
self.pwKL.addItem(arrow)
self.arrows.append(arrow)
#---------------------------------------------------------------------- 示例13: add_signal
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def add_signal(self, t_value, direction, offset, price, volume):
"""
增加信号
:param t_value:
:param direction:
:param offset:
:param price:
:param volume:
:return:
"""
# 找到信号时间最贴近的bar x轴
x = self.axisTime.get_x_by_time(t_value)
need_plot_arrow = False
# 修正一下 信号时间，改为bar的时间
if x not in self.x_t_trade_map:
bar_time = self.axisTime.xdict.get(x, t_value)
else:
# 如果存在映射，就更新
bar_time = self.x_t_trade_map[x]
trade_node = self.t_trade_dict.get(bar_time, None)
if trade_node is None:
# 当前时间无交易信号
self.t_trade_dict[bar_time] = {'x': x, 'signals': [{'direction': direction, 'offset':offset,'price': price,'volume': volume}]}
self.x_t_trade_map[x] = bar_time
need_plot_arrow = True
else:
#match_signals = [t for t in trade_node['signals'] if t['direction'] == direction and t['offset'] == offset]
#if len(match_signals) == 0:
need_plot_arrow = True
trade_node['signals'].append({'direction': direction, 'offset':offset, 'price': price, 'volume': volume})
self.x_t_trade_map[x] = bar_time
# 需要显示图标
if need_plot_arrow:
arrow = None
# 多信号
if direction == DIRECTION_LONG:
if offset == OFFSET_OPEN:
# buy
arrow = pg.ArrowItem(pos=(x, price), angle=135, brush=None, pen={'color':'r','width':1}, tipAngle=30, baseAngle=20, tailLen=10, tailWidth=2)
else:
# cover
arrow = pg.ArrowItem(pos=(x, price), angle=0, brush=(255, 0, 0),pen=None, headLen=20, headWidth=20, tailLen=10, tailWidth=2)
# 空信号
elif direction == DIRECTION_SHORT:
if offset == OFFSET_CLOSE:
# sell
arrow = pg.ArrowItem(pos=(x, price), angle=0, brush=(0, 255, 0),pen=None ,headLen=20, headWidth=20, tailLen=10, tailWidth=2)
else:
# short
arrow = pg.ArrowItem(pos=(x, price), angle=-135, brush=None, pen={'color':'g','width':1},tipAngle=30, baseAngle=20, tailLen=10, tailWidth=2)
if arrow:
self.pi_main.addItem(arrow)
self.list_trade_arrow.append(arrow) 示例14: add_signals
# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import ArrowItem [as 别名]
def add_signals(self):
self.signals_group_text = QtGui.QGraphicsItemGroup()
self.signals_group_arrow = QtGui.QGraphicsItemGroup()
self.signals_text_items = np.empty(len(Quotes), dtype=object)
for p in Portfolio.positions:
x, price = p.id_bar_open, p.open_price
if p.type == Order.BUY:
y = Quotes[x].low * 0.99
pg.ArrowItem(
parent=self.signals_group_arrow,
pos=(x, y),
pen=self.long_pen,
brush=self.long_brush,
angle=90,
headLen=12,
tipAngle=50,
)
text_sig = CenteredTextItem(
parent=self.signals_group_text,
pos=(x, y),
pen=self.long_pen,
brush=self.long_brush,
text=('Buy at {:.%df}' % self.digits).format(price),
valign=QtCore.Qt.AlignBottom,
)
text_sig.hide()
else:
y = Quotes[x].high * 1.01
pg.ArrowItem(
parent=self.signals_group_arrow,
pos=(x, y),
pen=self.short_pen,
brush=self.short_brush,
angle=-90,
headLen=12,
tipAngle=50,
)
text_sig = CenteredTextItem(
parent=self.signals_group_text,
pos=(x, y),
pen=self.short_pen,
brush=self.short_brush,
text=('Sell at {:.%df}' % self.digits).format(price),
valign=QtCore.Qt.AlignTop,
)
text_sig.hide()
self.signals_text_items[x] = text_sig
self.chart.addItem(self.signals_group_arrow)
self.chart.addItem(self.signals_group_text)
self.signals_visible = True