[FIXED] QStandardItemModel itemChanged not called

Issue

Using QStandardItemModel in a QTreeView, itemChanged signals are not triggered (for example on rename). If I recall correctly this was functioning in a much earlier PyQt5 version.

class Main(QMainWindow):
    def __init__(self):
        super().__init__()
        
        self.resize(200, 100)
        self.dataTree = QTreeView(self)
        self.dataTree.setSelectionMode(QAbstractItemView.SingleSelection)
        self.dataTree.resize(200, 100)
        self.dataModel = QStandardItemModel(self.dataTree)
        self.dataModel.setHorizontalHeaderLabels(['Sources'])
        self.dataModelParent = self.dataModel.invisibleRootItem()
        self.dataTree.setModel(self.dataModel)
        self.dataModel.itemChanged.connect(lambda: self.itemChanged)

        master = QStandardItem('test1')
        self.dataModel.appendRow(master)
        
    @pyqtSlot(QStandardItem)
    def itemChanged(self, item):
        print('Item Changed')

if __name__ == '__main__':
    app = QApplication(sys.argv)
    mainWindow = QMainWindow()
    Main = Main()
    Main.show()
    app.exec_()

Solution

Consider the line...

self.dataModel.itemChanged.connect(lambda: self.itemChanged)

Here, your lambda doesn't actually do anything. Instead you need something like...

self.dataModel.itemChanged.connect(lambda item: self.itemChanged(item))

Answered By - G.M.