将 Matplotlib 图形嵌入到小部件中 - PyQt5 [英] Embed a Matplotlib graphic into a widget - PyQt5

问题描述

我想将 Matplotlib 中的图形嵌入到包含 Widget 和从 QtDesigner 开发的 PushButton 的现有 GUI 中 和 PyQt5.我可以嵌入图形，但不能调整图形大小以将所有可用/需要的空间放入 Widget.

I would like to embed a graphic from Matplotlib into an existing GUI containing a Widget and a PushButton developed from QtDesigner and PyQt5. I can embed the graphic but can't resize the graphic to take all space available/needed into the Widget.

前端代码:

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(595, 393)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setMaximumSize(QtCore.QSize(100, 16777215))
        self.pushButton.setObjectName("pushButton")
        self.gridLayout.addWidget(self.pushButton, 0, 0, 1, 1)
        self.widget = QtWidgets.QWidget(self.centralwidget)
        self.widget.setMinimumSize(QtCore.QSize(0, 200))
        self.widget.setStyleSheet("background-color: rgb(255, 255, 255);")
        self.widget.setObjectName("widget")
        self.gridLayout.addWidget(self.widget, 0, 1, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 595, 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"))


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_())

后端代码:

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QSizePolicy
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure
from front_end import Ui_MainWindow

class Graph_init(FigureCanvas):

    def __init__(self, parent=None):

        fig = Figure()
        self.axes = fig.add_subplot(111)
        self.compute_initial_figure()

        FigureCanvas.__init__(self, fig)
        self.setParent(parent)

        FigureCanvas.setSizePolicy(self, QSizePolicy.Expanding, QSizePolicy.Expanding)
        FigureCanvas.updateGeometry(self)


class Graph_populate(Graph_init):

    def compute_initial_figure(self):

        x = [2000,2001,2002,2003,2004]
        y = [10,20,30,40,50]

        self.axes.plot(x, y)


class GUI(QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        super(GUI, self).__init__(parent)
        self.setupUi(self)
        self.sc = Graph_populate(self.widget)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    prog = GUI()
    prog.showMaximized()
    sys.exit(app.exec_())

谢谢

推荐答案

在 PyQt 中，您通常会通过将小部件添加到布局来向应用程序添加小部件.在代码中，您似乎忘记了执行该步骤.

In PyQt you would normally add a widget to your application by adding it to a Layout. In the code you seem to have forgotten to do that step.

因此，如果 self.gridLayout 是您希望 FigureCanvas 所在的布局，则需要将后者添加到前者中作为

So if self.gridLayout is the layout you want your FigureCanvas to reside in, you would need to add the latter to the former as

self.gridLayout.addWidget(self.sc, 0, 1, 1, 1)

另一方面，self.widget 的作用在这里不是很清楚，您可能会删除它.self.centralwidget 可以充当父级的角色，如果确实需要，

The role of self.widget on the other hand is not really clear here and you may probably remove it. The self.centralwidget can take the role of the parent, if it is really needed,

self.sc = Graph_populate(self.centralwidget)

这篇关于将 Matplotlib 图形嵌入到小部件中 - PyQt5的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！