QTableWidget 表头设置全选框-QT开发中文网

在QTableWidget的表头中添加一个复选框，可以实现全选功能。这可以通过继承QHeaderView并重写mousePressEvent()和paintSection()方法来实现：

class HeaderView(QtWidgets.QHeaderView):
    def __init__(self, orientation, parent=None):
        super(HeaderView, self).__init__(orientation, parent)
        self.setClickable(True)
        self.setSortIndicatorShown(False)
        self._checkbox_rect = QtCore.QRect()

    def paintSection(self, painter, rect, logicalIndex):
        painter.save()
        QtWidgets.QHeaderView.paintSection(self, painter, rect, logicalIndex)
        painter.restore()
        if logicalIndex == 0:
            self._checkbox_rect = QtCore.QRect(rect.left()+2, rect.top()+2, 20, 20)
            options = QtGui.QStyleOptionButton()
            options.rect = self._checkbox_rect
            options.state |= QtGui.QStyle.State_Enabled | QtGui.QStyle.State_Active
            if self.isSectionSelected(logicalIndex):
                options.state |= QtGui.QStyle.State_On
            else:
                options.state |= QtGui.QStyle.State_Off
            self.style().drawControl(QtGui.QStyle.CE_CheckBox, options, painter)

    def mousePressEvent(self, event):
        if self._checkbox_rect.contains(event.pos()):
            self.toggleSections()
        else:
            QtWidgets.QHeaderView.mousePressEvent(self, event)

    def toggleSections(self):
        check_state = not self.isSectionSelected(0)
        for i in range(self.model().rowCount()):
            self.setSectionSelected(i, check_state)

class Table(QtWidgets.QTableWidget):
    def __init__(self, parent=None):
        super(Table, self).__init__(parent)
        self.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Stretch)
        self.verticalHeader().hide()
        self.setHorizontalHeader(HeaderView(QtCore.Qt.Horizontal, self))
        self.setColumnCount(3)
        self.setRowCount(5)

    def setColumnHeaders(self, headers):
        self.setHorizontalHeaderLabels(['Select'] + headers)

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    table = Table()
    table.setColumnHeaders(['Name', 'Age'])
    for i in range(table.rowCount()):
        checkbox = QtWidgets.QCheckBox()
        table.setCellWidget(i, 0, checkbox)
    table.show()
    sys.exit(app.exec_())

这个示例将在表头中添加一个复选框，并在单击它时切换所有行的选择状态。如果要更改表头中的复选框的样式，请修改paintSection()方法中的options.rect和options.state。