Question

我正在开发统计软件，该软件将从Cloud Firestore数据库中获取数据，然后将其放入 QTableWidget 中，然后再放入图表中。我能够创建数据库的离线备份（下面的json）。我如何实现用来自其的数据填充 QTableWidget ？

在我的表格中，我有4个可见列-日期，类型，发布，已发送和一个隐藏-ID（格式化日期，例如050719）

这是我从数据库中获取的.json文件

"{\"events\": {\"050719\": {\"Type\": \"Conference\", \"Published\": \"4\", \"Sent\": \"3\", \"Date\": \"05.07.2019\"}, \"050919\": {\"Type\": \"Conference\", \"Published\": \"23\", \"Sent\": \"35\", \"Date\": \"05.09.2019\"}, \"120719\": {\"Type\": \"Conference\", \"Published\": \"3\", \"Sent\": \"4\", \"Date\": \"12.07.2019\"}, \"150719\": {\"Type\": \"Conference\", \"Published\": \"4\", \"Date\": \"15.07.2019\", \"Sent\": \"2\"}}}"

Answer 1

没有通用方法，但是基本思想是遍历组件，如下所示：

import json
from PySide2 import QtWidgets


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)

    data = "{\"events\": {\"050719\": {\"Type\": \"Conference\", \"Published\": \"4\", \"Sent\": \"3\", \"Date\": \"05.07.2019\"}, \"050919\": {\"Type\": \"Conference\", \"Published\": \"23\", \"Sent\": \"35\", \"Date\": \"05.09.2019\"}, \"120719\": {\"Type\": \"Conference\", \"Published\": \"3\", \"Sent\": \"4\", \"Date\": \"12.07.2019\"}, \"150719\": {\"Type\": \"Conference\", \"Published\": \"4\", \"Date\": \"15.07.2019\", \"Sent\": \"2\"}}}"
    # or
    # with open('/path/of/json') as f:
    #     data = json.load(f)
    d = json.loads(data)
    keys = ["Date", "Type", "Published", "Sent"]
    labels = keys + ["ID"]

    w = QtWidgets.QTableWidget(0, len(labels))
    w.setColumnHidden(4, True)
    w.setHorizontalHeaderLabels(labels)

    for i, (key, value) in enumerate(d["events"].items()):
        rows = [value[k] for k in keys] + [key]
        w.insertRow(w.rowCount())
        for j, v in enumerate(rows):
            it = QtWidgets.QTableWidgetItem(v)
            w.setItem(i, j, it)
    w.resize(640, 480)
    w.show()
    sys.exit(app.exec_())

更新：

import json
from PySide2 import QtCore, QtWidgets


class DateTimeDelegate(QtWidgets.QStyledItemDelegate):
    def initStyleOption(self, option, index):
        super(DateTimeDelegate, self).initStyleOption(option, index)
        value = index.data()
        option.text = QtCore.QDateTime.fromMSecsSinceEpoch(value).toString("dd.MM.yyyy")


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)

    data = # ...
    d = json.loads(data)
    keys = ["Date", "Type", "Published", "Sent"]
    labels = keys + ["ID"]

    w = QtWidgets.QTableWidget(0, len(labels))
    delegate = DateTimeDelegate(w)
    w.setItemDelegateForColumn(0, delegate)
    w.setColumnHidden(4, True)
    w.setHorizontalHeaderLabels(labels)

    for i, (key, value) in enumerate(d["events"].items()):
        rows = [
            value[k]
            if k != "Date"
            else QtCore.QDateTime.fromString(value[k], "dd.MM.yyyy").toMSecsSinceEpoch()
            for k in keys
        ] + [key]
        w.insertRow(w.rowCount())
        for j, v in enumerate(rows):
            it = QtWidgets.QTableWidgetItem()
            it.setData(QtCore.Qt.DisplayRole, v)
            w.setItem(i, j, it)
    w.resize(640, 480)
    w.show()
    sys.exit(app.exec_())

如何在Python中从JSON填充QTableWidget

1 个答案: