python - 当表格中的组合框发生变化时如何发出信号?
问题描述
每当文本发生任何变化时,我如何发出信号(或现在打印文本) QComboBox
?QComboBox
每次将一行添加到 a 时,都会在两列中创建一个新的QTableWidget
。最终,该信号将触发绘图的重绘。
现在,我可以从QComboBox
已经存在的具有特定实例名称的文本中打印文本,但是当在表中动态创建组合框时,我不知道该怎么做。
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_())
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_())
解决方案
没有什么变化:
x_combobox.currentTextChanged.connect(self.printComboBoxText)
y_combobox.currentTextChanged.connect(self.printComboBoxText)
推荐阅读
- javascript - Three.js - GLTF 模型位置不从原点开始
- c++ - 混合模板和运行时多态性是不好的做法吗?还有其他选择吗?
- javascript - NodeJS Net 服务器在 nmap 扫描时崩溃
- vba - MS Access:将值从表单文本框传递到新记录上的另一个表单组合框?
- c# - 使用 ImageMagick 导出多页 PDF 的第 1 页
- c# - 如何列出使用 c# 播放声音的音频设备
- python-3.x - matplotlib 自定义在数据框中绘制多列
- python - selenium 与 python 如何获得该类别中可用的产品的结果
- css - 使用 Bootstrap_package 为 Typo3 中的内容元素添加多个额外的预定义背景颜色
- javascript - JS Canvas - 无法绘制流畅的线条