PyQt5结合matplotlib绘图的实现示例
参考网上的例子,实现了简单的matplotlibpyqt5绘图
相关知识点:
(1)pyqt5中添加控件要在布局中添加
(2)布局可以使用replaceWidget替换控件
(3)信号与槽机制
timer=QtCore.QTimer(self) timer.timeout.connect(self.update_figure) self.btnPlot.clicked.connect(self.plotButton_callback)
实现的效果
importsys fromPyQt5importQtCore,QtGui,uic fromPyQt5.QtWidgetsimportQMainWindow,QAction,qApp,QApplication,QMessageBox,QVBoxLayout,QSizePolicy,QWidget fromPyQt5.QtGuiimportQIcon frommatplotlib.backends.backend_qt5aggimportFigureCanvasQTAggasFigureCanvas frommatplotlib.figureimportFigure importmatplotlib.pyplotasplt importnumpyasnp qtCreatorFile="matplotlib_ui.ui" #使用uic加载 Ui_MainWindow,QtBaseClass=uic.loadUiType(qtCreatorFile) classMyMplCanvas(FigureCanvas): """这是一个窗口部件,即QWidget(当然也是FigureCanvasAgg)""" def__init__(self,parent=None,width=5,height=4,dpi=100): fig=Figure(figsize=(width,height),dpi=dpi) self.axes=fig.add_subplot(111) #每次plot()调用的时候,我们希望原来的坐标轴被清除(所以False) self.axes.hold(False) self.axes.grid('on') self.compute_initial_figure() # FigureCanvas.__init__(self,fig) self.setParent(parent) FigureCanvas.setSizePolicy(self, QSizePolicy.Expanding, QSizePolicy.Expanding) FigureCanvas.updateGeometry(self) defcompute_initial_figure(self): pass classMyStaticMplCanvas(MyMplCanvas): """静态画布:一条正弦线""" defcompute_initial_figure(self): t=np.arange(0.0,3.0,0.01) s=np.sin(2*np.pi*t) self.axes.grid('on') self.axes.plot(t,s) classMyDynamicMplCanvas(MyMplCanvas): """动态画布:每秒自动更新,更换一条折线。""" def__init__(self,*args,**kwargs): MyMplCanvas.__init__(self,*args,**kwargs) timer=QtCore.QTimer(self) timer.timeout.connect(self.update_figure) timer.start(1000) defcompute_initial_figure(self): self.axes.grid('on') self.axes.plot([0,1,2,3],[1,2,0,4],'r') defupdate_figure(self): #构建4个随机整数,位于闭区间[0,10] l=[np.random.randint(0,10)foriinrange(4)] self.axes.grid('on') self.axes.plot([0,1,2,3],l,'r') self.draw() classMyApp(QMainWindow,Ui_MainWindow): def__init__(self): QMainWindow.__init__(self) Ui_MainWindow.__init__(self) super().__init__() self.initUI() self.initBtn() self.initFrame() definitFrame(self): self.main_widget=self.frame self.layout=QVBoxLayout(self.main_widget) self.f=MyMplCanvas(self.main_widget) self.layout.addWidget(self.f) definitUI(self): self.setupUi(self) self.setWindowTitle("PyQt5结合Matplotlib绘图") self.setWindowIcon(QIcon("rocket.ico"))#设置图标,linux下只有任务栏会显示图标 self.show() definitBtn(self): self.btnPlot.clicked.connect(self.plotButton_callback) self.btnPlot.setToolTip("Button") defplotButton_callback(self): self.drawFrame() defdrawFrame(self): sc=MyStaticMplCanvas(self.main_widget,width=5,height=4,dpi=100) dc=MyDynamicMplCanvas(self.f,width=5,height=4,dpi=100) self.layout.addWidget(sc) self.layout.replaceWidget(self.f,dc)#替换控件 if__name__=='__main__': app=QApplication(sys.argv) ex=MyApp() sys.exit(app.exec_())
参考链接:https://www.cnblogs.com/hhh5460/p/4322652.html
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