Python 当表中的组合框发生变化时,如何发出信号?
当任何Python 当表中的组合框发生变化时,如何发出信号?,python,python-3.x,pyqt,pyqt5,Python,Python 3.x,Pyqt,Pyqt5,当任何QComboBox中的文本发生变化时,我如何发出信号(或现在打印文本)?每次将行添加到QTableWidget时,都会在两列中创建一个新的QComboBox。最终,该信号将触发重新绘制绘图 现在,我能够从已经存在的带有特定实例名称的QComboBox打印文本,但我不知道在表中动态创建组合框时如何打印 主要代码: import sys from PyQt5.QtWidgets import ( QMainWindow, QApplication, QComboBox
QComboBox
中的文本发生变化时,我如何发出信号(或现在打印文本)?每次将行添加到QTableWidget
时,都会在两列中创建一个新的QComboBox
。最终,该信号将触发重新绘制绘图
现在,我能够从已经存在的带有特定实例名称的QComboBox
打印文本,但我不知道在表中动态创建组合框时如何打印
主要代码:
import sys
from PyQt5.QtWidgets import (
QMainWindow,
QApplication,
QComboBox,
)
from cb_in_tables import Ui_MainWindow
class MyWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.comboBox.addItems(['', '1', '2', '3'])
self.ui.pushButton.clicked.connect(self.addRow)
self.ui.comboBox.currentTextChanged.connect(self.printComboBoxText)
def printComboBoxText(self, text):
print(text)
def addRow(self):
"""Add new row to data table and populate with widgets."""
# Insert row
rowPos = self.ui.tableWidget.rowCount()
self.ui.tableWidget.insertRow(rowPos)
x_combobox = QComboBox()
x_combobox.addItems(['', 'A', 'B', 'C'])
self.ui.tableWidget.setCellWidget(rowPos, 0, x_combobox)
y_combobox = QComboBox()
y_combobox.addItems(['', 'X', 'Y', 'Z'])
self.ui.tableWidget.setCellWidget(rowPos, 1, y_combobox)
if __name__ == "__main__":
app = QApplication(sys.argv)
main = MyWindow()
main.show()
sys.exit(app.exec_())
用户界面文件:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'cb_in_tables.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(291, 299)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)
self.tableWidget.setGeometry(QtCore.QRect(30, 60, 231, 161))
self.tableWidget.setObjectName("tableWidget")
self.tableWidget.setColumnCount(2)
self.tableWidget.setRowCount(0)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(0, item)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(1, item)
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(30, 20, 113, 32))
self.pushButton.setObjectName("pushButton")
self.comboBox = QtWidgets.QComboBox(self.centralwidget)
self.comboBox.setGeometry(QtCore.QRect(160, 20, 104, 31))
self.comboBox.setObjectName("comboBox")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 291, 24))
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"))
item = self.tableWidget.horizontalHeaderItem(0)
item.setText(_translate("MainWindow", "X"))
item = self.tableWidget.horizontalHeaderItem(1)
item.setText(_translate("MainWindow", "Y"))
self.pushButton.setText(_translate("MainWindow", "Add Row"))
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_())
没有任何变化:
x_combobox.currentTextChanged.connect(self.printComboBoxText)
y_combobox.currentTextChanged.connect(self.printComboBoxText)
哦,我现在看到了。这些行必须进入addRow
函数。我没有意识到我可以连接\uuuu init\uuuu
之外的信号/插槽。