选中/取消选中选定的树视图项

例如,当我单击Jason时,它应该将所有其他选中的项都切换为选中状态。然而,现在发生的情况是,Jason成为唯一被选中和选中的项目。

单击Jason之前:

点击jason后的当前结果:

我希望发生的事情:

import sys
import os
from PySide import QtGui, QtCore


class Example(QtGui.QDialog):
    def __init__(self, parent=None):
        super(Example, self).__init__(parent)
        self.resize(300, 300)
        self.setWindowTitle('Example')

        self.ui_items = QtGui.QTreeView()
        self.ui_items.sortByColumn(1, QtCore.Qt.AscendingOrder)
        self.ui_items.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
        self.ui_items.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
        self.ui_items.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)
        self.ui_items.setModel(QtGui.QStandardItemModel())

        grid = QtGui.QGridLayout()
        grid.setContentsMargins(0, 0, 0, 0)
        grid.addWidget(self.ui_items, 0, 0)
        self.setLayout(grid)
        self.setLayout(grid)

        self.create_model()


    def create_model(self):
        model = self.ui_items.model()
        model.clear()
        model.setHorizontalHeaderLabels(['Items'])
        self.ui_items.sortByColumn(0, QtCore.Qt.AscendingOrder)

        data = {
            'Family 01': ['Amy', 'Kevin'],
            'Family 02': ['Sarah', 'Jason', 'Abby'],
            'Family 03': ['Michelle', 'Mike', 'Scott', 'Allie']
        }

        for k, v in data.items():
            root = []

            # family
            root_node = QtGui.QStandardItem()
            root_node.setData(k, role=QtCore.Qt.DisplayRole)
            root.append(root_node)

            # children
            for child in v:

                row = []
                row_node = QtGui.QStandardItem()
                row_node.setData(child, role=QtCore.Qt.DisplayRole)
                row_node.setCheckable(True)
                row.append(row_node)
                root_node.appendRow(row)

            model.appendRow(root)

        self.ui_items.expandAll()
        self.ui_items.resizeColumnToContents(0)


def main():
    app = QtGui.QApplication(sys.argv)
    ex = Example()
    ex.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()