python - QTableView 未在 dataChanged 上更新

Question

当模型数据更改时，我无法更新 QTableView 的布局。我尝试使用 dataChanged.emit(index,index)、layoutChanged.emit() 以及最后的手段 reset()。没有一个奏效。我的代码:

class SettingsDialog(QDialog, settings_design.Ui_settingsDialog):
    def __init__(self):
        super(self.__class__, self).__init__()
        self.setupUi(self)
        self.weekdayTable = QTableView(self.weekdayPage)
        weekdayModel = self.loadMeetingData(self.meetingsData['weekdayList'])
      #weekdayModel.dataChanged.connect(self.updateTable)
        self.weekdayTable.setModel(weekdayModel)

    def updateTable(self):
        self.weekdayTable.repaint()

class MeetingsModel(QStandardItemModel):
    def __init__(self, data, columns):
        QStandardItemModel.__init__(self, data, columns)
        with open('meetings.config.json') as f:
            self.meetingsData = json.load(f)

    def setData(self, index, value, other):

        self.meetingsData['weekdayList'][int(index.row())][index.column()] = value
        with open('meetings.config.json', 'w+') as f:
            f.write(json.dumps(self.meetingsData))

        self.dataChanged.emit(index, index)
        # self.layoutChanged.emit(index, index)
        return True

我做错了什么？

Answer 1

我最终通过其他方法解决了这个问题。

旧方法(优雅的方法):

我扩展了 QStandardModelItem 的 setData 方法，将修改后的数据保存到文件中。

新方法:

当 dataChanged signal 由 QStandarItemModel 发出时，连接的 slot (writeChangedData) 将更改的数据写入文件。换句话说，我将功能从 setData 移到了插槽中。

代码:

class SettingsDialog(QDialog, settings_design.Ui_settingsDialog):
    def __init__(self):
        super(self.__class__, self).__init__()
        self.setupUi(self)
        self.weekdayTable = QTableView(self.weekdayPage)
        self.weekdayModel = self.loadMeetingData(self.meetingsData['weekdayList'])
        self.weekdayModel.dataChanged.connect(self.writeModifiedData)
        self.weekdayTable.setModel(self.weekdayModel)

    def writeModifiedData(self, topLeft, bottomRight):
        self.weekdayModel['weekdayList'][int(topLeft.row())][topLeft.column()] = value
        with open('meetings.config.json', 'w+') as f:
            f.write(json.dumps(self.weekdayModel))
            f.close()