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使用QTableViewand QAbstractTableModel，我希望能够在表格中选择多个单元格并进行编辑影响所有选定的单元格。这就是我目前的做法，其中包括将view( QTableView) 和proxy_model( QSortFilterProxyModel) 传递到类中，以便我可以访问它们（以获取适当的行和列）：

import sys
from pprint import pprint

try:
    from PySide2 import QtWidgets, QtCore
except ImportError:
    from PyQt5 import QtWidgets, QtCore


class MyTableModel(QtCore.QAbstractTableModel):
    def __init__(self,
                view,
                proxy_model,
                table_data,
                parent=None):
        QtCore.QAbstractTableModel.__init__(self, parent)

        self.table_data = table_data
        self.view = view
        self.proxy_model = proxy_model

    def rowCount(self, parent):
        return len(self.table_data)

    def columnCount(self, parent):
        return len(self.table_data[0])

    def flags(self, index):
        # Original, inherited flags:
        original_flags = super(MyTableModel, self).flags(index)

        return original_flags | QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable

    def data(self, index, role):
        if role == QtCore.Qt.DisplayRole:
            row = index.row()
            column = index.column()
            item = index.internalPointer()

            if item is not None:
                print(item)
            value = self.table_data[row][column]

            return value

        return None

    def setData(self, index, value, role=QtCore.Qt.EditRole):
        if role == QtCore.Qt.EditRole:
            row = index.row()
            column = index.column()

            selection_model = self.view.selectionModel()
            selected_indexes = selection_model.selectedIndexes()

            for selected_index in selected_indexes:

                mapped_index = self.proxy_model.mapToSource(selected_index)
                selected_row = mapped_index.row()
                selected_column = mapped_index.column()

                self.table_data[selected_row][selected_column] = value
                pprint(self.table_data)

                self.dataChanged.emit(index, selected_index)  # from, to

            return True

        return False


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)

    table_data = [['one', 'two', 'three'], ['four', 'five', 'six']]

    view = QtWidgets.QTableView()
    proxy_model = QtCore.QSortFilterProxyModel()
    model = MyTableModel(view=view, proxy_model=proxy_model, table_data=table_data)

    proxy_model.setSourceModel(model)
    proxy_model.setDynamicSortFilter(True)

    view.setModel(proxy_model)
    view.setSortingEnabled(True)  # requires proxy model
    view.sortByColumn(0, QtCore.Qt.AscendingOrder)
    view.horizontalHeader().setStretchLastSection(True)
    view.horizontalHeader().setSectionsMovable(True)

    view.show()
    app.exec_()

我怀疑我不必通过view并proxy_model进入班级，并且可以通过其他方式访问这些对象。这是可能的，如果是这样 - 怎么做？

我知道我的示例是特定于 Python 的，但我的问题实际上是一个与绑定无关的问题，所以我也用qt.

4

1 回答 1

1

基本模型不应该知道视图或代理，所以你应该有类似下面的东西：

class MyTableModel(QtCore.QAbstractTableModel):
    def __init__(self, table_data, parent=None):
        QtCore.QAbstractTableModel.__init__(self, parent)
        self.table_data = table_data

    def rowCount(self, parent):
        return len(self.table_data)

    def columnCount(self, parent):
        return len(self.table_data[0])

    def flags(self, index):
        original_flags = super(MyTableModel, self).flags(index)
        return original_flags | QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable

    def data(self, index, role=QtCore.Qt.DisplayRole):
        if role == QtCore.Qt.DisplayRole:
            row = index.row()
            column = index.column()
            item = index.internalPointer()
            if item is not None:
                print(item)
            value = self.table_data[row][column]
            return value

    def setData(self, index, value, role=QtCore.Qt.EditRole):
        if role == QtCore.Qt.EditRole:
            row = index.row()
            column = index.column()
            self.table_data[row][column] = value
            self.dataChanged.emit(index, index)
            return True
        return QtCore.QAbstractTableModel.setData(self, index, value, role)

代理具有将更改传递给原始模型的方法，因此通常不需要访问基本模型来进行更改，而是使用相同的代理，有一个订单我实现了一个小部件并且我使用了该dataChanged()方法，这可能导致一个无限循环，所以我们必须阻止dataChanged()我们使用的其他信号blockSignals()。

class Widget(QtWidgets.QWidget):
    def __init__(self, *args, **kwargs):
        QtWidgets.QWidget.__init__(self, *args, **kwargs)
        self.view = QtWidgets.QTableView()
        self.setLayout(QtWidgets.QVBoxLayout())
        self.layout().addWidget(self.view)

        table_data = [['one', 'two', 'three'], ['four', 'five', 'six']]
        proxy_model = QtCore.QSortFilterProxyModel()
        model = MyTableModel(table_data=table_data)
        proxy_model.setSourceModel(model)
        proxy_model.setDynamicSortFilter(True)
        self.view.setModel(proxy_model)
        proxy_model.dataChanged.connect(self.on_data_changed)

        self.view.setSortingEnabled(True)  # requires proxy model
        self.view.sortByColumn(0, QtCore.Qt.AscendingOrder)
        self.view.horizontalHeader().setStretchLastSection(True)
        self.view.horizontalHeader().setSectionsMovable(True)

    def on_data_changed(self, _from, _to):
        model = _from.model() # proxy model
        model.blockSignals(True)
        for index in self.view.selectionModel().selectedIndexes():
            model.setData(index, _from.data())
        model.blockSignals(False)

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

更新：

似乎PySide2有一个错误，因为它不返回选定的元素而是一个空列表，因此它没有进入 for 循环，在我们为其创建该列表之前，我们使用 的selectionChanged信号selectionModel()，这在 PyQt5 中不会发生：

class Widget(QtWidgets.QWidget):
    def __init__(self, *args, **kwargs):
        [...]
        self.view.horizontalHeader().setSectionsMovable(True)

        self.view.selectionModel().selectionChanged.connect(self.on_selectionChanged)
        self.currentSelected = []

    def on_selectionChanged(self, selected, deselected):
        for ix in selected.indexes():
           if ix not in self.currentSelected:
            self.currentSelected.append(ix)
        for ix in deselected.indexes():
            if ix in self.currentSelected:
                self.currentSelected.remove(ix)

    def on_data_changed(self, _from, _to):
        model = _from.model() # proxy model
        model.blockSignals(True)
        pindexes = [QtCore.QPersistentModelIndex(ix) for ix in self.currentSelected]
        for index in pindexes:
            model.setData(index, _from.data())
        model.blockSignals(False)
于 2018-02-01T15:52:03.183 回答