Question

我正在编写一个用于管理和显示温室数据的应用程序。逻辑在python中，在qt Designer中在Qt5中创建gui。这是一个学习项目，我都是新手。我有：main_file.py，matplotlib.py（小部件）和gui.py。事情似乎正常，小部件在gui中加载，终端中没有错误，但图形未显示。我在做什么错了？

# this is my gui.py file below
from Tab_Widget_Main_scailing_01 import Ui_MainWindow


class DesignerMainWindow(QtWidgets.QMainWindow, Ui_MainWindow):

    def __init__(self, parent = None):
        super(DesignerMainWindow, self).__init__(parent)
        self.setupUi(self)

    def mplwidget(self):
        timestamp = np.array([])
        temp_up = np.array([])
        time_format = '%d,%m,%Y,%X'

        self.ax.plot(timestamp, temp_up)
        self.ax.draw()

if __name__ == '__main__':
    app = QtWidgets.QApplication([sys.argv])
    gui = DesignerMainWindow()
    gui.show()
    sys.exit(app.exec_())

这是一个matplotlib.py小部件：

from PyQt5 import QtWidgets
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure

class MplCanvas(FigureCanvas):
    def __init__(self):
        self.fig = Figure()
        self.ax = self.fig.add_subplot(111)
        FigureCanvas.__init__(self, self.fig)
        FigureCanvas.setSizePolicy(self,
                                    QtWidgets.QSizePolicy.Expanding,
                                    QtWidgets.QSizePolicy.Expanding)
        FigureCanvas.updateGeometry(self)

class MplWidget(QtWidgets.QWidget):
    def __init__(self, parent = None):
        QtWidgets.QWidget.__init__(self, parent)
        self.canvas = MplCanvas()
        self.vbl = QtWidgets.QVBoxLayout()
        self.vbl.addWidget(self.canvas)
        self.setLayout(self.vbl)

这是设计器生成的gui.py文件中与matplotlib小部件有关的行：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        (...)
        self.mpl_tab = QtWidgets.QWidget()
        self.mpl_tab.setObjectName("mpl_tab")
        self.horizontalLayout_49 = QtWidgets.QHBoxLayout(self.mpl_tab)
        self.horizontalLayout_49.setObjectName("horizontalLayout_49")
        self.horizontalLayout_48 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_48.setObjectName("horizontalLayout_48")
        self.tabWidget_4 = QtWidgets.QTabWidget(self.mpl_tab)
        self.tabWidget_4.setObjectName("tabWidget_4")
        self.mpl = MplWidget()
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
   sizePolicy.setHeightForWidth(self.mpl.sizePolicy().hasHeightForWidth())
        self.mpl.setSizePolicy(sizePolicy)
        self.mpl.setObjectName("mpl")
        self.tabWidget_4.addTab(self.mpl, "")

Answer 1

弄清楚了。我唯一缺少的是主文件的__init __（）函数中的“ self.mplwidget（）”。

将matplotlib小部件嵌入python程序中的QtDesigner生成的gui中

1 个答案: