从 Qt Designer 调用一个小部件
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【中文标题】从 Qt Designer 调用一个小部件【英文标题】：Calling a widget from Qt Designer 【发布时间】：2020-09-12 17:34:07 【问题描述】：我创建了下面给出的 QT 设计器代码，其中包含一个名为 mplWidget 的小部件。
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(741, 542)
font = QtGui.QFont()
font.setPointSize(16)
font.setItalic(True)
MainWindow.setFont(font)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
self.verticalLayout.setObjectName("verticalLayout")
self.horizontalLayout = QtWidgets.QHBoxLayout()
self.horizontalLayout.setObjectName("horizontalLayout")
self.main_Group = QtWidgets.QGroupBox(self.centralwidget)
self.main_Group.setTitle("")
self.main_Group.setObjectName("main_Group")
self.graphGroup = QtWidgets.QGroupBox(self.main_Group)
self.graphGroup.setGeometry(QtCore.QRect(200, 10, 501, 461))
self.graphGroup.setAlignment(QtCore.Qt.AlignCenter)
self.graphGroup.setObjectName("graphGroup")
self.mplWidget = QtWidgets.QWidget(self.graphGroup)
self.mplWidget.setGeometry(QtCore.QRect(10, 40, 481, 411))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.mplWidget.setFont(font)
self.mplWidget.setObjectName("mplWidget")
self.varGroup = QtWidgets.QGroupBox(self.main_Group)
self.varGroup.setGeometry(QtCore.QRect(10, 10, 181, 251))
font = QtGui.QFont()
font.setPointSize(16)
font.setItalic(True)
self.varGroup.setFont(font)
self.varGroup.setAlignment(QtCore.Qt.AlignCenter)
self.varGroup.setObjectName("varGroup")
self.pressureLabel = QtWidgets.QLabel(self.varGroup)
self.pressureLabel.setGeometry(QtCore.QRect(10, 80, 71, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.pressureLabel.setFont(font)
self.pressureLabel.setObjectName("pressureLabel")
self.pressureLineEdit = QtWidgets.QLineEdit(self.varGroup)
self.pressureLineEdit.setGeometry(QtCore.QRect(80, 80, 71, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.pressureLineEdit.setFont(font)
self.pressureLineEdit.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
self.pressureLineEdit.setObjectName("pressureLineEdit")
self.pressureUnitLabel = QtWidgets.QLabel(self.varGroup)
self.pressureUnitLabel.setGeometry(QtCore.QRect(160, 80, 31, 21))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.pressureUnitLabel.setFont(font)
self.pressureUnitLabel.setObjectName("pressureUnitLabel")
self.temperatureLabel = QtWidgets.QLabel(self.varGroup)
self.temperatureLabel.setGeometry(QtCore.QRect(10, 120, 91, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.temperatureLabel.setFont(font)
self.temperatureLabel.setObjectName("temperatureLabel")
self.temperatureLineEdit = QtWidgets.QLineEdit(self.varGroup)
self.temperatureLineEdit.setGeometry(QtCore.QRect(110, 120, 41, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.temperatureLineEdit.setFont(font)
self.temperatureLineEdit.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
self.temperatureLineEdit.setObjectName("temperatureLineEdit")
self.temperatureUnitLabel = QtWidgets.QLabel(self.varGroup)
self.temperatureUnitLabel.setGeometry(QtCore.QRect(160, 120, 31, 21))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.temperatureUnitLabel.setFont(font)
self.temperatureUnitLabel.setObjectName("temperatureUnitLabel")
self.componentLabel = QtWidgets.QLabel(self.varGroup)
self.componentLabel.setGeometry(QtCore.QRect(10, 30, 91, 21))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.componentLabel.setFont(font)
self.componentLabel.setObjectName("componentLabel")
self.componentCombo = QtWidgets.QComboBox(self.varGroup)
self.componentCombo.setGeometry(QtCore.QRect(10, 50, 161, 22))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.componentCombo.setFont(font)
self.componentCombo.setObjectName("componentCombo")
self.eosLabel = QtWidgets.QLabel(self.varGroup)
self.eosLabel.setGeometry(QtCore.QRect(10, 160, 141, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.eosLabel.setFont(font)
self.eosLabel.setObjectName("eosLabel")
self.eosCombo = QtWidgets.QComboBox(self.varGroup)
self.eosCombo.setGeometry(QtCore.QRect(11, 180, 161, 22))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.eosCombo.setFont(font)
self.eosCombo.setObjectName("eosCombo")
self.variablesSubmitButton = QtWidgets.QPushButton(self.varGroup)
self.variablesSubmitButton.setGeometry(QtCore.QRect(90, 220, 91, 31))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.variablesSubmitButton.setFont(font)
self.variablesSubmitButton.setObjectName("variablesSubmitButton")
self.resultsGroup = QtWidgets.QGroupBox(self.main_Group)
self.resultsGroup.setGeometry(QtCore.QRect(9, 279, 181, 191))
self.resultsGroup.setAlignment(QtCore.Qt.AlignCenter)
self.resultsGroup.setObjectName("resultsGroup")
self.vrhoLabel = QtWidgets.QLabel(self.resultsGroup)
self.vrhoLabel.setGeometry(QtCore.QRect(10, 30, 101, 21))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.vrhoLabel.setFont(font)
self.vrhoLabel.setObjectName("vrhoLabel")
self.lrhoLabel = QtWidgets.QLabel(self.resultsGroup)
self.lrhoLabel.setGeometry(QtCore.QRect(10, 90, 111, 21))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.lrhoLabel.setFont(font)
self.lrhoLabel.setObjectName("lrhoLabel")
self.vrhoLineEdit = QtWidgets.QLineEdit(self.resultsGroup)
self.vrhoLineEdit.setGeometry(QtCore.QRect(10, 60, 101, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.vrhoLineEdit.setFont(font)
self.vrhoLineEdit.setInputMask("")
self.vrhoLineEdit.setText("")
self.vrhoLineEdit.setFrame(True)
self.vrhoLineEdit.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
self.vrhoLineEdit.setReadOnly(False)
self.vrhoLineEdit.setObjectName("vrhoLineEdit")
self.lrhoLineEdit = QtWidgets.QLineEdit(self.resultsGroup)
self.lrhoLineEdit.setGeometry(QtCore.QRect(10, 120, 101, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.lrhoLineEdit.setFont(font)
self.lrhoLineEdit.setInputMask("")
self.lrhoLineEdit.setFrame(True)
self.lrhoLineEdit.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
self.lrhoLineEdit.setObjectName("lrhoLineEdit")
self.lrhoUnitLabel = QtWidgets.QLabel(self.resultsGroup)
self.lrhoUnitLabel.setGeometry(QtCore.QRect(120, 120, 61, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.lrhoUnitLabel.setFont(font)
self.lrhoUnitLabel.setObjectName("lrhoUnitLabel")
self.vrhoUnitLabel = QtWidgets.QLabel(self.resultsGroup)
self.vrhoUnitLabel.setGeometry(QtCore.QRect(120, 60, 61, 20))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.vrhoUnitLabel.setFont(font)
self.vrhoUnitLabel.setObjectName("vrhoUnitLabel")
self.resultsSubmitButton = QtWidgets.QPushButton(self.resultsGroup)
self.resultsSubmitButton.setGeometry(QtCore.QRect(90, 160, 91, 31))
font = QtGui.QFont()
font.setPointSize(12)
font.setItalic(False)
self.resultsSubmitButton.setFont(font)
self.resultsSubmitButton.setObjectName("resultsSubmitButton")
self.horizontalLayout.addWidget(self.main_Group)
self.verticalLayout.addLayout(self.horizontalLayout)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 741, 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", "Equation of State"))
self.graphGroup.setTitle(_translate("MainWindow", "Graph"))
self.varGroup.setTitle(_translate("MainWindow", "Variables"))
self.pressureLabel.setText(_translate("MainWindow", "Pressure"))
self.pressureLineEdit.setPlaceholderText(_translate("MainWindow", "101325"))
self.pressureUnitLabel.setText(_translate("MainWindow", "Pa"))
self.temperatureLabel.setText(_translate("MainWindow", "Temperature"))
self.temperatureLineEdit.setPlaceholderText(_translate("MainWindow", "273"))
self.temperatureUnitLabel.setText(_translate("MainWindow", "K"))
self.componentLabel.setText(_translate("MainWindow", "Component:"))
self.eosLabel.setText(_translate("MainWindow", "Equation of State:"))
self.variablesSubmitButton.setText(_translate("MainWindow", "Calculate"))
self.resultsGroup.setTitle(_translate("MainWindow", "Results"))
self.vrhoLabel.setText(_translate("MainWindow", "Vapor Density:"))
self.lrhoLabel.setText(_translate("MainWindow", "Liquid Density:"))
self.vrhoLineEdit.setPlaceholderText(_translate("MainWindow", "Initial Guess"))
self.lrhoLineEdit.setPlaceholderText(_translate("MainWindow", "Initial Guess"))
self.lrhoUnitLabel.setText(_translate("MainWindow", "<html><head/><body><p>mol/m<span style=\" vertical-align:super;\">3</span></p><p><br/></p></body></html>"))
self.vrhoUnitLabel.setText(_translate("MainWindow", "<html><head/><body><p>mol/m<span style=\" vertical-align:super;\">3</span></p><p><br/></p></body></html>"))
self.resultsSubmitButton.setText(_translate("MainWindow", "Calculate"))
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_())
我计划嵌入一个 matplotlib 图，该图在以下脚本中给出：
import sys
import PyQt5
from PyQt5 import QtCore, QtGui, uic, QtWidgets
from PyQt5.QtWidgets import QWidget
from EoS_GUIv2 import Ui_MainWindow
import matplotlib
matplotlib.use('Qt5Agg')
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg
from matplotlib.figure import Figure
if hasattr(QtCore.Qt, 'AA_EnableHighDpiScaling'):
PyQt5.QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling, True)
if hasattr(QtCore.Qt, 'AA_UseHighDpiPixmaps'):
PyQt5.QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_UseHighDpiPixmaps, True)
class MplCanvas(FigureCanvasQTAgg):
def __init__(self, parent=None, width=5, height=4, dpi = 100):
fig = Figure(figsize=(width, height), dpi=dpi)
self.axes = fig.add_subplot(111)
super(MplCanvas, self).__init__(fig)
class MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
sc = MplCanvas(self, width=5, height=4, dpi=100)
sc.axes.plot([0,1,2,3,4], [10,1,20,3,40])
self.ui.mplWidget(sc)
self.show()
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())
当我尝试从 Qt Designer 代码调用 mplWidget 时，我收到以下错误：
'QWidget' object is not callable问题具体出在
sc = MplCanvas(self, width=5, height=4, dpi=100)
sc.axes.plot([0,1,2,3,4], [10,1,20,3,40])
self.ui.mplWidget(sc)
self.show()
我真的不知道如何调用我的小部件并嵌入图表。
我正在引用 https://www.learnpyqt.com/courses/graphics-plotting/plotting-matplotlib/ ，但我似乎无法让它工作。
【问题讨论】：
【参考方案1】：我不明白你为什么要调用 mplWidget。在您的情况下，最可以接受的是使用 mplWidget 作为容器并使用布局将 sc 放置在 mplWidget 中：
class MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
sc = MplCanvas(self, width=5, height=4, dpi=100)
sc.axes.plot([0,1,2,3,4], [10,1,20,3,40])
lay = QtWidgets.QVBoxLayout(self.ui.mplWidget)
lay.addWidget(sc)
self.show()【讨论】：
你是对的@eyllanesc。我本可以更好地表达我的陈述。非常感谢您的帮助！ @uBoscuBo 如果回答对您有帮助，请不要忘记标记为正确，如果您不知道该怎么做，请查看***.com/tour以上是关于从 Qt Designer 调用一个小部件的主要内容，如果未能解决你的问题，请参考以下文章
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