从 QTableWidget 动态读取值并存储它

Question

我有一个QTablewidget，它可以添加行和列。值可以由用户插入。我知道如何使用 current.item() 方法获取单元格的单个值。但是想想看下面的图片。用户可以插入不同的值和文本。我喜欢单独读取行值。因为我需要稍后使用值。但我不知道如何以及在何处可以动态读取值，并且仍然有一种方法可以判断 C 下的值是否有效。

可视化：

这里第一行的值是 Text、12、none、25 和 I。用户可以添加更多行并插入不同的值。我想要一种方法或方法来读取和存储行的所有值，并且同时读取和存储一行。

我认为 QSortFilterProxyModel 是一个很好的解决方案。但是如何通过这种方法读取值？

import sys
from PyQt5 import QtCore, QtGui, QtWidgets


def copy_widget(w):
    if isinstance(w, QtWidgets.QWidget):
        new_w = type(w)()
        if isinstance(w, QtWidgets.QComboBox):
            vals = [w.itemText(ix) for ix in range(w.count())]
            new_w.addItems(vals)
        return new_w

class LoadTable(QtWidgets.QTableWidget):
    def __init__(self, parent=None):
        super(LoadTable, self).__init__(1, 5, parent)
        self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))   
        headertitle = ("A","B","C","D","E")
        self.setHorizontalHeaderLabels(headertitle)
        self.verticalHeader().hide()
        self.horizontalHeader().setHighlightSections(False)
        self.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Fixed)

        self.setSelectionMode(QtWidgets.QAbstractItemView.NoSelection)
        self.setColumnWidth(0, 130)

        combox_lay = QtWidgets.QComboBox(self)
        combox_lay.addItems(["I","II"])
        self.setCellWidget(0, 4, combox_lay)

        self.cellChanged.connect(self._cellclicked)


    @QtCore.pyqtSlot(int, int)
    def _cellclicked(self, r, c):
        it = self.item(r, c)
        it.setTextAlignment(QtCore.Qt.AlignCenter)
        n_it = self.item(r,1)
        n_it.setToolTip('Test') 


    @QtCore.pyqtSlot()
    def _addrow(self):
        rowcount = self.rowCount()
        self.insertRow(rowcount)
        combox_add = QtWidgets.QComboBox(self)
        combox_add.addItems(["I","II"])
        self.setCellWidget(rowcount, 4, combox_add)

    @QtCore.pyqtSlot()
    def _removerow(self):
        if self.rowCount() > 0:
            self.removeRow(self.rowCount()-1)

    @QtCore.pyqtSlot()
    def _copyrow(self):
        r = self.currentRow()
        if 0 <= r < self.rowCount():
            cells = {"items": [], "widgets": []}
            for i in range(self.columnCount()):
                it = self.item(r, i)
                if it:
                    cells["items"].append((i, it.clone()))
                w = self.cellWidget(r, i)
                if w:
                    cells["widgets"].append((i, copy_widget(w)))
            self.copy(cells, r+1)

    def copy(self, cells, r):
        self.insertRow(r)
        for i, it in cells["items"]:
            self.setItem(r, i, it)
        for i, w in cells["widgets"]:
            self.setCellWidget(r, i, w)   

class ThirdTabLoads(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super(ThirdTabLoads, self).__init__(parent)    

        table = LoadTable()

        add_button = QtWidgets.QPushButton("Add")
        add_button.clicked.connect(table._addrow)

        delete_button = QtWidgets.QPushButton("Delete")
        delete_button.clicked.connect(table._removerow)

        copy_button = QtWidgets.QPushButton("Copy")
        copy_button.clicked.connect(table._copyrow)

        button_layout = QtWidgets.QVBoxLayout()
        button_layout.addWidget(add_button, alignment=QtCore.Qt.AlignBottom)
        button_layout.addWidget(delete_button, alignment=QtCore.Qt.AlignTop)
        button_layout.addWidget(copy_button, alignment=QtCore.Qt.AlignTop)

        tablehbox = QtWidgets.QHBoxLayout()
        tablehbox.setContentsMargins(10, 10, 10, 10)
        tablehbox.addWidget(table)

        grid = QtWidgets.QGridLayout(self)
        grid.addLayout(button_layout, 0, 1)
        grid.addLayout(tablehbox, 0, 0)        


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    w = ThirdTabLoads()
    w.show()
    sys.exit(app.exec_())

Answer 1

我找到了一种读取用户插入的所有值的方法。它很简单，使用 self.cellChanged.connect(self._row) 方法。我没有成功获得的唯一值是单元格内 QcomboBox 的值。它 returns 一个空字符串。

这是解决方案。

class LoadTable(QtWidgets.QTableWidget):
    def __init__(self, parent=None):
        super(LoadTable, self).__init__(1, 5, parent)

        ------------------------

        self.cellChanged.connect(self._row)

        ------------------------

    def _row(self):
        row = self.rowCount()
        column = self.columnCount()
        A = []
        for r in range(row):
            for c in range(column):
                it = self.item(r,c)
                if it:
                    text = it.text()
                    A.append(text)
                    print( A, len(A))

输出为带有一些随机输入的列表：

['LC1', '-1200', '0', '', '', 'LC2', '', '', '20', ''] 10

从 QTableWidget 动态读取值并存储它

Dynamically reading values from QTableWidget and store it

python

pyqt

qtablewidget

pyqt5