Python pyqtgraph.PlotWidget方法代码示例

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def plot():
    start = pg.ptime.time()
    n = 15
    pts = 100
    x = np.linspace(0, 0.8, pts)
    y = np.random.random(size=pts)*0.8
    for i in range(n):
        for j in range(n):
            ## calling PlotWidget.plot() generates a PlotDataItem, which 
            ## has a bit more overhead than PlotCurveItem, which is all 
            ## we need here. This overhead adds up quickly and makes a big
            ## difference in speed.
            
            #plt.plot(x=x+i, y=y+j)
            plt.addItem(pg.PlotCurveItem(x=x+i, y=y+j))
            
            #path = pg.arrayToQPath(x+i, y+j)
            #item = QtGui.QGraphicsPathItem(path)
            #item.setPen(pg.mkPen('w'))
            #plt.addItem(item)
            
    dt = pg.ptime.time() - start
    print("Create plots took: %0.3fms" % (dt*1000))

## Plot and clear 5 times, printing the time it took 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def setupUi(self, Form):
        Form.setObjectName(_fromUtf8("Form"))
        Form.resize(400, 300)
        self.gridLayout = QtGui.QGridLayout(Form)
        self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
        self.sizeSpin = QtGui.QSpinBox(Form)
        self.sizeSpin.setProperty("value", 10)
        self.sizeSpin.setObjectName(_fromUtf8("sizeSpin"))
        self.gridLayout.addWidget(self.sizeSpin, 1, 1, 1, 1)
        self.pixelModeCheck = QtGui.QCheckBox(Form)
        self.pixelModeCheck.setObjectName(_fromUtf8("pixelModeCheck"))
        self.gridLayout.addWidget(self.pixelModeCheck, 1, 3, 1, 1)
        self.label = QtGui.QLabel(Form)
        self.label.setObjectName(_fromUtf8("label"))
        self.gridLayout.addWidget(self.label, 1, 0, 1, 1)
        self.plot = PlotWidget(Form)
        self.plot.setObjectName(_fromUtf8("plot"))
        self.gridLayout.addWidget(self.plot, 0, 0, 1, 4)
        self.randCheck = QtGui.QCheckBox(Form)
        self.randCheck.setObjectName(_fromUtf8("randCheck"))
        self.gridLayout.addWidget(self.randCheck, 1, 2, 1, 1)

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form) 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        self.gridLayout = QtGui.QGridLayout(Form)
        self.gridLayout.setObjectName("gridLayout")
        self.sizeSpin = QtGui.QSpinBox(Form)
        self.sizeSpin.setProperty("value", 10)
        self.sizeSpin.setObjectName("sizeSpin")
        self.gridLayout.addWidget(self.sizeSpin, 1, 1, 1, 1)
        self.pixelModeCheck = QtGui.QCheckBox(Form)
        self.pixelModeCheck.setObjectName("pixelModeCheck")
        self.gridLayout.addWidget(self.pixelModeCheck, 1, 3, 1, 1)
        self.label = QtGui.QLabel(Form)
        self.label.setObjectName("label")
        self.gridLayout.addWidget(self.label, 1, 0, 1, 1)
        self.plot = PlotWidget(Form)
        self.plot.setObjectName("plot")
        self.gridLayout.addWidget(self.plot, 0, 0, 1, 4)
        self.randCheck = QtGui.QCheckBox(Form)
        self.randCheck.setObjectName("randCheck")
        self.gridLayout.addWidget(self.randCheck, 1, 2, 1, 1)

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form) 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def test_PlotWidget():
    def mkobjs(*args, **kwds):
        w = pg.PlotWidget(*args, **kwds)
        data = pg.np.array([1,5,2,4,3])
        c = w.plot(data, name='stuff')
        w.addLegend()
        
        # test that connections do not keep objects alive
        w.plotItem.vb.sigRangeChanged.connect(mkrefs)
        app.focusChanged.connect(w.plotItem.vb.invertY)
        
        # return weakrefs to a bunch of objects that should die when the scope exits.
        return mkrefs(w, c, data, w.plotItem, w.plotItem.vb, w.plotItem.getMenu(), w.plotItem.getAxis('left'))
    
    for i in range(5):
        assert_alldead(mkobjs()) 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [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)

    #---------------------------------------------------------------------- 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def init(self, name, input):
        self.plot = pg.PlotWidget(title=name)
        self.plot.block = self

        self.plot.setLabel('bottom', 'Frequency', units='Hz')

        self.bars = pg.BarGraphItem()

        self.setup_range()

        # TODO: Better autoranging features
        #self.plot.enableAutoRange('xy', False)
        
        self.plot.setYRange(0, self.yrange)

        self.input = input
        self.name = name 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def init(self, history=512, autoscale=True):
        self.widget = pg.PlotWidget()
        self.widget.block = self

        self.gr_block.set_history(history)

        self.plot = self.widget.plot()
        self.plot.setPen(QtGui.QColor(self.input.color))
        #self.widget.setYRange(*self.yrange)

        self.widget.enableAutoRange('y', 0.95 if autoscale else False)

        self.buffer = []

        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self.updateGUI)
        self.timer.start(100) 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def init(self, history=512, autoscale=True):
        self.widget = pg.PlotWidget()
        self.widget.block = self

        self.gr_block.set_history(history)

        self.plot = self.widget.plot()
        self.plot.setPen(QtGui.QColor(self.input.color))
        #self.widget.setYRange(*self.yrange)

        self.widget.enableAutoRange('y', 0.95 if autoscale else False)

        self.buffer = []

        self.timer = pg.QtCore.QTimer()
        self.timer.timeout.connect(self.updateGUI)
        self.timer.start(100) 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def __init__(self):
        super().__init__()
        self.xaxis = DateAxis(orientation='bottom')
        self.xaxis.setStyle(tickTextOffset=7, textFillLimits=[(0, 0.80)])
        self.yaxis = PriceAxis()

        self.layout = QtGui.QVBoxLayout(self)
        self.layout.setContentsMargins(0, 0, 0, 0)

        self.chart = pg.PlotWidget(
            axisItems={'bottom': self.xaxis, 'right': self.yaxis},
            enableMenu=False,
        )
        self.chart.setFrameStyle(QtGui.QFrame.StyledPanel | QtGui.QFrame.Plain)
        self.chart.getPlotItem().setContentsMargins(*CHART_MARGINS)
        self.chart.showGrid(x=True, y=True)
        self.chart.hideAxis('left')
        self.chart.showAxis('right')

        self.chart.setCursor(QtCore.Qt.BlankCursor)
        self.chart.sigXRangeChanged.connect(self._update_yrange_limits)

        self.layout.addWidget(self.chart) 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def initUI(self):
        self.pw = pg.PlotWidget()
        self.layout = pg.GraphicsLayout(border=(100, 100, 100))
        self.layout.setContentsMargins(0, 0, 0, 0)
        self.layout.setSpacing(0)
        self.layout.setBorder(color=(255, 255, 255, 255), width=0.8)
        self.layout.setZValue(0)
        self.layout.setMinimumHeight(140)
        self.pw.setCentralWidget(self.layout)
        # 设置横坐标
        xdict = {}
        self.axisTime = MyStringAxis(xdict, orientation='bottom')
        # 初始化资金曲线
        self.initPlotFund()
        # 十字光标
        self.crosshair = Crosshair(self.pw, self)

        self.vbox = QtWidgets.QVBoxLayout()
        self.vbox.addWidget(self.pw)
        self.setLayout(self.vbox)

        self.initCompleted = True
        self.oldSize = self.rect().height() 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def initUI(self):
        self.pw = pg.PlotWidget()
        self.layout = pg.GraphicsLayout(border=(10, 10, 10))
        self.layout.setContentsMargins(0, 0, 0, 0)
        self.layout.setSpacing(0)
        self.layout.setBorder(color=(255, 255, 255, 255), width=0.8)
        self.layout.setZValue(0)
        self.layout.setMinimumHeight(140)
        self.pw.setCentralWidget(self.layout)
        # 设置横坐标
        xdict = {}
        self.axisTime = MyStringAxis(xdict, orientation='bottom')
        # 初始化资金曲线
        self.initPlotGraph()
        # 十字光标
        self.crosshair = GCrosshair(self.pw, self)

        self.vbox = QVBoxLayout()
        self.vbox.addWidget(self.pw)
        self.setLayout(self.vbox)

        self.initCompleted = True
        self.oldSize = self.rect().height() 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def test_getViewWidget_deleted():
    view = pg.PlotWidget()
    item = pg.InfiniteLine()
    view.addItem(item)
    assert item.getViewWidget() is view
    
    # Arrange to have Qt automatically delete the view widget
    obj = pg.QtGui.QWidget()
    view.setParent(obj)
    del obj
    gc.collect()

    assert not pg.Qt.isQObjectAlive(view)
    assert item.getViewWidget() is None


#if __name__ == '__main__':
    #view = pg.PlotItem()
    #vref = weakref.ref(view)
    #item = pg.InfiniteLine()
    #view.addItem(item)
    #del view
    #gc.collect() 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(993, 692)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.horizontalLayout = QtGui.QHBoxLayout(self.centralwidget)
        self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
        self.pbLevel = QtGui.QProgressBar(self.centralwidget)
        self.pbLevel.setMaximum(1000)
        self.pbLevel.setProperty("value", 123)
        self.pbLevel.setTextVisible(False)
        self.pbLevel.setOrientation(QtCore.Qt.Vertical)
        self.pbLevel.setObjectName(_fromUtf8("pbLevel"))
        self.horizontalLayout.addWidget(self.pbLevel)
        self.frame = QtGui.QFrame(self.centralwidget)
        self.frame.setFrameShape(QtGui.QFrame.NoFrame)
        self.frame.setFrameShadow(QtGui.QFrame.Plain)
        self.frame.setObjectName(_fromUtf8("frame"))
        self.verticalLayout = QtGui.QVBoxLayout(self.frame)
        self.verticalLayout.setMargin(0)
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.label = QtGui.QLabel(self.frame)
        self.label.setObjectName(_fromUtf8("label"))
        self.verticalLayout.addWidget(self.label)
        self.grFFT = PlotWidget(self.frame)
        self.grFFT.setObjectName(_fromUtf8("grFFT"))
        self.verticalLayout.addWidget(self.grFFT)
        self.label_2 = QtGui.QLabel(self.frame)
        self.label_2.setObjectName(_fromUtf8("label_2"))
        self.verticalLayout.addWidget(self.label_2)
        self.grPCM = PlotWidget(self.frame)
        self.grPCM.setObjectName(_fromUtf8("grPCM"))
        self.verticalLayout.addWidget(self.grPCM)
        self.horizontalLayout.addWidget(self.frame)
        MainWindow.setCentralWidget(self.centralwidget)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow) 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(820, 650)
        MainWindow.setAutoFillBackground(False)
        MainWindow.setDocumentMode(False)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.verticalLayout = QtGui.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.horizontalLayout = QtGui.QHBoxLayout()
        self.horizontalLayout.setContentsMargins(-1, -1, 0, 0)
        self.horizontalLayout.setSpacing(10)
        self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
        self.btnAdd = QtGui.QPushButton(self.centralwidget)
        self.btnAdd.setObjectName(_fromUtf8("btnAdd"))
        self.horizontalLayout.addWidget(self.btnAdd)
        self.chkMore = QtGui.QCheckBox(self.centralwidget)
        self.chkMore.setObjectName(_fromUtf8("chkMore"))
        self.horizontalLayout.addWidget(self.chkMore)
        self.verticalLayout.addLayout(self.horizontalLayout)
        self.grPlot = PlotWidget(self.centralwidget)
        self.grPlot.setObjectName(_fromUtf8("grPlot"))
        self.verticalLayout.addWidget(self.grPlot)
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtGui.QStatusBar(MainWindow)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow) 

# 需要导入模块: import pyqtgraph [as 别名]
# 或者: from pyqtgraph import PlotWidget [as 别名]
def initUi(self):
        """初始化界面"""
        self.setWindowTitle(u'K线工具')
        # 主图
        self.pw = pg.PlotWidget()
        # 界面布局
        self.lay_KL = pg.GraphicsLayout(border=(100,100,100))
        self.lay_KL.setContentsMargins(10, 10, 10, 10)
        self.lay_KL.setSpacing(0)
        self.lay_KL.setBorder(color=(255, 0, 0, 255), width=0.8)
        self.lay_KL.setZValue(0)
        self.KLtitle = self.lay_KL.addLabel(u'')
        self.pw.setCentralItem(self.lay_KL)
        # 设置横坐标
        xdict = {}
        self.axisTime = MyStringAxis(xdict, orientation='bottom')
        # 初始化子图
        self.initplotKline()
        self.initplotVol()  
        self.initplotOI()
        # 注册十字光标
        self.crosshair = Crosshair(self.pw,self)
        # 设置界面
        self.vb = QVBoxLayout()
        self.vb.addWidget(self.pw)
        self.setLayout(self.vb)
        # 初始化完成
        self.initCompleted = True    

    #----------------------------------------------------------------------