在 PyQt5 中将绘图嵌入到图形视图中

Question

我使用 pyqtgraph 在 PyQt5 GUI 中绘图。我可以在弹出窗口 window 中绘图，但我正在尝试将图形嵌入 graphicsView 区域。

这是我如何在新的 window 中绘制简单的图：

    self.pushButton.clicked.connect(self.btn_clk)

    MainWindow.show()
def btn_clk(self):
    L = [1,2,3,4,5]
    pg.plot(L)

我试过用这条线来嵌入剧情，但是不行：

    self.pushButton.clicked.connect(self.btn_clk)

    MainWindow.show()
def btn_clk(self):
    L = [1,2,3,4,5]
    self.graphicsView.plot(L)

完整代码如下：

import pyqtgraph as pg
from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(662, 512)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.centralwidget)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.verticalLayout = QtWidgets.QVBoxLayout()
        self.verticalLayout.setObjectName("verticalLayout")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setObjectName("lineEdit")
        self.verticalLayout.addWidget(self.lineEdit)
        self.graphicsView = QtWidgets.QGraphicsView(self.centralwidget)
        self.graphicsView.setObjectName("graphicsView")
        self.verticalLayout.addWidget(self.graphicsView)
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setObjectName("pushButton")
        self.verticalLayout.addWidget(self.pushButton)
        self.horizontalLayout.addLayout(self.verticalLayout)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 662, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))

        self.pushButton.clicked.connect(self.btn_clk)

        MainWindow.show()
    def btn_clk(self):
        L = [1,2,3,4,5]
        pg.plot(L)#this line plots in a new window
        self.graphicsView.plot(L)#this line doesn't work



if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

Answer 1

Pg.plotreturnspg.graphicsWindows.PlotWindowclass的一个实例，而这个class继承自QGraphicsView，即pg.graphicsWindows.PlotWindow 用于绘图，但 QGraphicsView 不是。如果您想在 Widget 中嵌入绘图，您必须使用 class pg.PlotWidget()，您必须更改：

self.graphicsView = QtWidgets.QGraphicsView(self.centralwidget)

至：

self.graphicsView = pg.PlotWidget(self.centralwidget)

和：

def btn_clk(self):
    L = [1,2,3,4,5]
    self.graphicsView.plot(L)#this line doesn't work

输出：

在 PyQt5 中将绘图嵌入到图形视图中

Embeding plot into graphicsView in PyQt5

python

pyqt

pyqt5

pyqtgraph