QtableView sortingEnabled 和列选择

Question

我在 PySide 6 中使用 QtableView，由 QSortFilterProxyModel 填充，并且 setSortingEnabled 为 true，因此我可以按列排序。 但是通过这样做，我不再能够通过单击标题来选择列。

这个想法是能够通过单击箭头图标对列进行排序，并通过单击文本来选择列。

Answer 1

启用sortingEnabled属性后，selectColumn槽的sectionPressed信号断开，因此可能的解决方案是重新连接：

from PySide6.QtCore import QSortFilterProxyModel
from PySide6.QtGui import QStandardItem, QStandardItemModel
from PySide6.QtWidgets import QApplication, QTableView


def main():
    app = QApplication()

    model = QStandardItemModel(10, 4)
    for i in range(model.rowCount()):
        for j in range(model.columnCount()):
            item = QStandardItem(f"item {i}x{j}")
            model.setItem(i, j, item)

    proxy_model = QSortFilterProxyModel()
    proxy_model.setSourceModel(model)

    view = QTableView()
    view.setSortingEnabled(True)
    view.setModel(proxy_model)
    view.resize(640, 480)
    view.show()

    view.horizontalHeader().sectionPressed.connect(view.selectColumn)

    app.exec()


if __name__ == "__main__":
    main()

既然OP希望它只在指示器被按下时被排序，那么就需要防止命令指示器在被按下时改变状态。

from PySide6.QtCore import QSortFilterProxyModel, Qt
from PySide6.QtGui import QStandardItem, QStandardItemModel
from PySide6.QtWidgets import QApplication, QHeaderView, QTableView


class HorizontalHeader(QHeaderView):
    def mousePressEvent(self, event):
        self.new_order = self.sortIndicatorOrder()
        super().mousePressEvent(event)
        height = self.height()
        x = event.position().x()
        logical_index = self.logicalIndexAt(x)
        x_left = self.sectionPosition(logical_index)
        x_right = x_left + self.sectionSize(logical_index)
        if (x_right - height) <= x <= x_right:
            self.new_order = (
                Qt.DescendingOrder
                if self.new_order == Qt.AscendingOrder
                else Qt.AscendingOrder
            )

    def mouseReleaseEvent(self, event):
        super().mouseReleaseEvent(event)
        x = event.position().x()
        logical_index = self.logicalIndexAt(x)
        self.setSortIndicator(logical_index, self.new_order)


def main():
    app = QApplication()
    app.setStyle("fusion")

    model = QStandardItemModel(10, 4)
    for i in range(model.rowCount()):
        for j in range(model.columnCount()):
            item = QStandardItem(f"item {i}x{j}")
            model.setItem(i, j, item)

    proxy_model = QSortFilterProxyModel()
    proxy_model.setSourceModel(model)

    view = QTableView()
    horizontal_header = HorizontalHeader(Qt.Horizontal)
    view.setHorizontalHeader(horizontal_header)
    horizontal_header.setSortIndicatorShown(True)
    horizontal_header.setSectionsClickable(True)
    view.setModel(proxy_model)
    horizontal_header.sortIndicatorChanged.connect(proxy_model.sort)
    horizontal_header.setSortIndicator(0, Qt.AscendingOrder)
    view.resize(640, 480)
    view.show()

    app.exec()


if __name__ == "__main__":
    main()