在QTreeView中显示来自QAbstractTableModel的数据

精简版

我试图从显示的数据QAbstracctTableModel中QTreeView。完成后，最终将整个表显示为每个节点的子代（以及孙子代，等等）。如何显示抽象表模型的树状视图？

细节

我想在显示一些数据QAbstractTableModel中QTreeView。在模型-视图教程，呈现一个例子后QAbstractTableModel，这使它看起来很简单的替换QTableView用QTreeView：

您可以将上面的示例转换为具有树视图的应用程序。只需将QTableView替换为QTreeView，即可生成一个读/写树。无需对模型进行任何更改。

进行此替换时，最终会显示一棵树，但是如果单击任何图标以将其展开（由于没有内置层次结构，该图标将不起作用），Python崩溃Python.exe has stopped working。这是在]之前提出的，但是没有可行的解决方案。

为了尝试解决此问题，我在QAbstractTableModel子类中重新实现了索引功能（请参见下面的完整工作示例）。这导致了非常不同的错误类型。即，树中的每个节点现在都包含整个表作为数据。无论我单击多少次，都将显示整个表格。像这样：

I seem to be in some kind of recursive nightmare, and do not know how to escape. The related question below suggests I might have to go to QAbstractItemModel, but the tutorial quote above suggests otherwise (which states, No changes have to be made to the model).

Related question

QTreeView always displaying the same data

Full working example

from PySide import QtGui, QtCore

class Food(object):
    def __init__(self, name, shortDescription, note, parent = None):
        self.data = (name, shortDescription, note);
        self.parentIndex = parent

class FavoritesTableModel(QtCore.QAbstractTableModel):
    def __init__(self):
        QtCore.QAbstractTableModel.__init__(self)
        self.foods = []  
        self.loadData() 

    def data(self, index, role = QtCore.Qt.DisplayRole):
        if role == QtCore.Qt.DisplayRole:
            return self.foods[index.row()].data[index.column()]
        return None

    def rowCount(self, index=QtCore.QModelIndex()):
        return len(self.foods)

    def columnCount(self, index=QtCore.QModelIndex()):
        return 3

    def index(self, row, column, parent = QtCore.QModelIndex()):  
        return self.createIndex(row, column, parent)

    def loadData(self):   
        allFoods=("Apples", "Pears", "Grapes", "Cookies", "Stinkberries")
        allDescs = ("Red", "Green", "Purple", "Yummy", "Huh?")
        allNotes = ("Bought recently", "Kind of delicious", "Weird wine grapes",
                    "So good...eat with milk", "Don't put in your nose")
        for name, shortDescription, note in zip(allFoods, allDescs, allNotes):
            food = Food(name, shortDescription, note)                                      
            self.foods.append(food) 

def main():
    import sys
    app = QtGui.QApplication(sys.argv)

    model = FavoritesTableModel() 

    #Table view
    view1 = QtGui.QTableView()
    view1.setModel(model)
    view1.show()

    #Tree view
    view2 = QtGui.QTreeView()
    view2.setModel(model)
    view2.show()

    sys.exit(app.exec_())

if __name__ == '__main__':
    main()