如何使用cellWidget处理来自QTableWidget单元的信号

Question

我在QTableWidget上工作过，问题是如果单元格是由QTableWidgetItem设置的，那么信号"itemChanged"工作得很好，很容易得到行/列/文本，但如果单元格是通过像QLineEdit这样的cellWidget设置的，则信号"itemChanged"不工作，信号"textChanged"或QLineEdit本身工作，但如果数百个QLineEdit，这太难了，有可能像itemChanged一样工作吗？请帮忙，谢谢。

代码如下：

import sys
from PyQt5.QtWidgets import *
class Table(QWidget):
def __init__(self):
super(Table, self).__init__()
self.initUI()
def initUI(self):
self.setWindowTitle("QTableWidget Example")
self.resize(400,300)
self.layout=QHBoxLayout()
self.TableWidget=QTableWidget(4,3)

self.TableWidget.setHorizontalHeaderLabels(['Nmae','Sex','Weight(kG)'])
# self.newItem=QTableWidgetItem('Jack')
# self.TableWidget.setItem(0,0,self.newItem)
# self.newItem=QTableWidgetItem('Male')
# self.TableWidget.setItem(0,1,self.newItem)
# self.newItem=QTableWidgetItem('160')
# self.TableWidget.setItem(0,2,self.newItem)
self.newItem=QLineEdit('Jack')        
self.TableWidget.setCellWidget(0,0,self.newItem)        
self.newItem.textChanged.connect(self.txtChange)
self.newItem=QLineEdit('Male')        
self.TableWidget.setCellWidget(0,1,self.newItem)        
self.newItem=QLineEdit('160')        
self.TableWidget.setCellWidget(0,2,self.newItem)        
self.layout.addWidget(self.TableWidget)
self.setLayout(self.layout)
self.TableWidget.itemChanged.connect(self.changeTest)
def changeTest(self,item):
# print('test')
print(item.text())
def txtChange(self,txt):
print(txt)
if __name__ == '__main__':
app=QApplication(sys.argv)
win=Table()
win.show()
sys.exit(app.exec_())

Answer 1

一个可能的解决方案是不使用cellWidget，而是永久打开委托编辑器：

class StyledItemDelegate(QStyledItemDelegate):
def createEditor(self, parent, option, index):
return QLineEdit(parent)

class Table(QWidget):
def __init__(self):
super(Table, self).__init__()
self.initUI()
def initUI(self):
self.setWindowTitle("QTableWidget Example")
self.resize(400, 300)
self.tableWidget = QTableWidget(4, 3)
delegate = StyledItemDelegate(self)
self.tableWidget.setItemDelegate(delegate)
self.tableWidget.setHorizontalHeaderLabels(["Nmae", "Sex", "Weight(kG)"])
self.tableWidget.itemChanged.connect(self.changeTest)
lay = QHBoxLayout(self)
lay.addWidget(self.tableWidget)
it = QTableWidgetItem("Jack")
self.tableWidget.setItem(0, 0, it)
self.tableWidget.openPersistentEditor(it)
it = QTableWidgetItem("Male")
self.tableWidget.setItem(0, 1, it)
self.tableWidget.openPersistentEditor(it)
it = QTableWidgetItem("160")
self.tableWidget.setItem(0, 2, it)
self.tableWidget.openPersistentEditor(it)
def changeTest(self, item):
print(item.text())