python - 如何在 PyQt5 中发出 dataChanged

Question

下面的代码在 self.emit 行中断。它在 PyQt4 中运行良好。如何修复此代码以使其在 PyQt5 中工作？

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QObject, pyqtSignal

class ItemDelegate(QtWidgets.QItemDelegate):
    def __init__(self, parent):
        QtWidgets.QItemDelegate.__init__(self, parent)

    def createEditor(self, parent, option, index):
        return QtWidgets.QLineEdit()

    @QtCore.pyqtSlot()
    def setModelData(self, editor, model, index): 
        self.emit(QtCore.SIGNAL("dataChanged(QModelIndex,QModelIndex)"), index, index)  

稍后编辑:

可行的解决方案:

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QObject, pyqtSignal

class Communicate(QObject):
    data_changed = pyqtSignal(QtCore.QModelIndex, QtCore.QModelIndex)

class ItemDelegate(QtWidgets.QItemDelegate):
    def __init__(self, parent):
        QtWidgets.QItemDelegate.__init__(self, parent)
        self.c = Communicate()

    @QtCore.pyqtSlot()
    def setModelData(self, editor, model, index):
        self.c.data_changed.emit(index, index)

Answer 1

As you can read here , QtCore.SIGNAL 在 PyQt4 之后停产，因此不兼容。

This page解释了 PyQt5 的新型信号和槽。语法是:

PyQt5.QtCore.pyqtSignal(types[, name[, revision=0[, arguments=[]]]])

您的案例可以翻译成:

from PyQt5 import pyqtsignal

data_changed = pyqtsignal(QModelindex,QModelIndex)

并发出你的信号:

self.data_changed.emit(index, index)

编辑:根据以下评论改编的解决方案。