标签：alt main code 刷新 rom ima ati ack 运行
先看一个简单的小例子：
完整代码：
import numpy as np import pyqtgraph as pg import sys from PyQt5.QtWidgets import QWidget,QApplication,QFrame,QGridLayout,QVBoxLayout class Example(QWidget): def __init__(self): super(Example, self).__init__() self.initUI() self.generate_image() def initUI(self): self.setGeometry(200,200,1000,800) self.setWindowTitle("实时刷新正余弦波形图") self.gridLayout = QGridLayout(self) self.frame = QFrame(self) self.frame.setFrameShape(QFrame.Panel) self.frame.setFrameShadow(QFrame.Plain) self.frame.setLineWidth(2) self.frame.setStyleSheet("background-color:rgb(0,255,255);") self.gridLayout.addWidget(self.frame,0,0,1,2) self.setLayout(self.gridLayout) def generate_image(self): verticalLayout = QVBoxLayout(self.frame) win = pg.GraphicsLayoutWidget(self.frame) verticalLayout.addWidget(win) p = win.addPlot(title="动态波形图") p.showGrid(x=True,y=True) p.setLabel(axis="left",text="Amplitude / V") p.setLabel(axis="bottom",text="t / s") p.setTitle("y = sin(x)") p.addLegend() # mkpen(‘y‘, width=3, style=QtCore.Qt.DashLine) self.curve1 = p.plot(pen=pg.mkPen("r",width=2),name="y1") #设置pen 格式 self.Fs = 1024.0 #采样频率 self.N = 1024 #采样点数 self.f0 = 4.0 #信号频率 self.pha = 0 #初始相位 self.t = np.arange(self.N) / self.Fs #时间向量 1*1024的矩阵 self.curve1.setData(self.t, np.sin(8 * np.pi * self.t + self.pha * np.pi / 180.0)) if __name__ == ‘__main__‘: app = QApplication(sys.argv) ex = Example() ex.show() sys.exit(app.exec_())
下面举一个复杂一点的例子，这个例子在一个波形图上实时连续刷新两条曲线，分别为正弦曲线和余弦曲线，运行结果的动态图如下：
效果如下：
完整代码：
import numpy as np import pyqtgraph as pg import sys from PyQt5.QtWidgets import QWidget,QApplication,QFrame,QGridLayout,QLabel,QPushButton,QVBoxLayout from PyQt5.QtCore import Qt,QTimer class Example(QWidget): def __init__(self): super(Example, self).__init__() self.initUI() self.generate_image() def initUI(self): self.setGeometry(200,200,1000,800) self.setWindowTitle("实时刷新正余弦波形图") self.gridLayout = QGridLayout(self) self.frame = QFrame(self) self.frame.setFrameShape(QFrame.Panel) self.frame.setFrameShadow(QFrame.Plain) self.frame.setLineWidth(2) self.frame.setStyleSheet("background-color:rgb(0,255,255);") self.label = QLabel(self) self.label.setText("正弦函数&余弦函数") self.label.setAlignment(Qt.AlignCenter) self.button = QPushButton(self) self.button.setText("生成波形图") self.button.clicked.connect(self.btnClick) self.gridLayout.addWidget(self.frame,0,0,1,2) self.gridLayout.addWidget(self.label,1,0,1,1) self.gridLayout.addWidget(self.button,1,1,1,1) self.setLayout(self.gridLayout) def generate_image(self): verticalLayout = QVBoxLayout(self.frame) win = pg.GraphicsLayoutWidget(self.frame) verticalLayout.addWidget(win) p = win.addPlot(title="动态波形图") p.showGrid(x=True,y=True) p.setLabel(axis="left",text="Amplitude / V") p.setLabel(axis="bottom",text="t / s") p.setTitle("y1 = sin(x) y2 = cos(x)") p.addLegend() self.curve1 = p.plot(pen="r",name="y1") self.curve2 = p.plot(pen="g",name="y2") self.Fs = 1024.0 #采样频率 self.N = 1024 #采样点数 self.f0 = 4.0 #信号频率 self.pha = 0 #初始相位 self.t = np.arange(self.N) / self.Fs #时间向量 1*1024的矩阵 def plotData(self): self.pha += 10 self.curve1.setData(self.t , np.sin(8 * np.pi * self.t+ self.pha * np.pi/180.0)) self.curve2.setData(self.t , np.cos(8 * np.pi * self.t + self.pha * np.pi/180.0)) def btnClick(self): self.button.setText("再次点击加速！") timer = QTimer(self) timer.timeout.connect(self.plotData) timer.start(100) if __name__ == ‘__main__‘: app = QApplication(sys.argv) ex = Example() ex.show() sys.exit(app.exec_())
标签：alt main code 刷新 rom ima ati ack 运行
原文地址：https://www.cnblogs.com/XJT2018/p/10284832.html
