我们从Python开源项目中，提取了以下5个代码示例，用于说明如何使用pyqtgraph.ArrowItem()。
def initplotKline(self): """Kline""" self.pw2 = pg.PlotWidget(name='Plot2') # K?? 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) #----------------------------------------------------------------------
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) #----------------------------------------------------------------------
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.orientArrow() self.model.sigSceneChanged.connect(self.orientArrow) self.setFlag(self.ItemIgnoresTransformations)
def setup(self): self.settings.New('spec_index', dtype=int, initial=0) self.settings.spec_index.add_listener(self.on_spec_index_change) self.settings.New("x_axis", dtype=str, initial='power_wheel', choices=('power_wheel', 'pm_power')) self.ui = QtWidgets.QGroupBox() self.ui.setLayout(QtWidgets.QVBoxLayout()) self.ui.spec_index_doubleSpinBox = QtWidgets.QDoubleSpinBox() self.settings.spec_index.connect_bidir_to_widget(self.ui.spec_index_doubleSpinBox) self.ui.layout().addWidget(self.ui.spec_index_doubleSpinBox) self.ui.x_axis_comboBox = QtWidgets.QComboBox() self.settings.x_axis.connect_to_widget(self.ui.x_axis_comboBox) self.ui.layout().addWidget(self.ui.x_axis_comboBox) self.graph_layout = pg.GraphicsLayoutWidget() self.ui.layout().addWidget(self.graph_layout) self.power_plot = self.graph_layout.addPlot() self.power_plot.setLogMode(x=True, y=True) self.power_plotcurve = self.power_plot.plot([1],[1]) self.power_plot_current_pos = self.power_plot.plot(symbol='o') #self.power_plot_arrow = pg.ArrowItem() #self.power_plot_arrow.setPos(0,0) #self.power_plot.addItem(self.power_plot_arrow) self.graph_layout.nextRow() self.spec_plot = self.graph_layout.addPlot() self.spec_plotcurve = self.spec_plot.plot([0])
def setup(self): self.settings.New('spec_index', dtype=int, initial=0) self.settings.spec_index.add_listener(self.on_spec_index_change) self.ui = QtWidgets.QGroupBox() self.ui.setLayout(QtWidgets.QVBoxLayout()) self.ui.spec_index_doubleSpinBox = QtWidgets.QDoubleSpinBox() self.settings.spec_index.connect_bidir_to_widget(self.ui.spec_index_doubleSpinBox) self.ui.layout().addWidget(self.ui.spec_index_doubleSpinBox) self.graph_layout = pg.GraphicsLayoutWidget() self.ui.layout().addWidget(self.graph_layout) self.power_plot = self.graph_layout.addPlot() self.power_plot.setLogMode(x=True, y=True) self.power_plotcurve = self.power_plot.plot([1],[1], name='Data') self.power_fit_plotcurve = self.power_plot.plot([1],[1],pen='r', name='Fit') self.power_plot_arrow = pg.ArrowItem() self.power_plot_arrow.setPos(0,0) self.power_plot.addItem(self.power_plot_arrow) self.power_plot_lr = pg.LinearRegionItem([1,2]) self.power_plot_lr.setZValue(-10) self.power_plot.addItem(self.power_plot_lr) self.power_plot_lr.sigRegionChanged.connect(self.redo_fit) #self.power_plot_legend = pg.LegendItem() #self.power_plot.addItem(self.power_plot_legend) #self.power_plot_legend.addItem(self.power_plotcurve) #self.power_plot_legend.addItem(self.power_fit_plotcurve) self.fit_text = pg.TextItem("fit") self.fit_text.setParentItem(self.power_plot_lr, ) self.graph_layout.nextRow() self.spec_plot = self.graph_layout.addPlot() self.spec_plotcurve = self.spec_plot.plot([0])
