QTreeView始终显示相同的数据

Question

我有一个项目树。它是这样的：

Categorias (root) 
- General 
--- Computadoras 
--- Tablets 
- Insumos 
--- Cartuchos 

的问题是，QTreeView正在用相同的信息总是完成。我得到一个树状图看起来像这样：

Categorias (root) 
- General 
--- General 
--- Insumos 
- Insumos 
--- General 

我已经把“打印”在index()方法，以查看是否该指数是被创建，然后，当我输入，例如“一般“类别，创建”Computadoras“和”平板电脑“的索引，但是那个时候！然后，显示的数据是错误的！任何想法？

我给你我的树视图的实现。什么等于Qt教程之一？

def buildTree(categorias, parentTree, step): 
    for categoria in categorias: 
     #print "-"*step, categoria.descripcion 
     newTreeItem = CategoriasTreeItem(categoria, parentTree) 
     parentTree.appendChild(newTreeItem) 
     if len(categoria.subCategorias) > 0: 
      buildTree(categoria.subCategorias, newTreeItem, step + 1) 


class CategoriasProductoTableModel(QtCore.QAbstractTableModel): 
    def __init__(self, session): 
     QtCore.QAbstractTableModel.__init__(self) 
     self.session = session 
     self.rootItem = CategoriasTreeItem() 

    def updateData(self): 
     categorias = self.session.query(CategoriaProducto).filter(CategoriaProducto.idCategoriaSuperior == None).all() 
     #print [len(categoria.subCategorias) for categoria in categorias] 
     buildTree(categorias, self.rootItem, 1) 
     #c = self.rootItem.child(0) 
     #print [i.data(0) for i in c.childItems] 
     self.modelReset.emit() 

    def setData(self, index, value, role): 
     if index.isValid() and role == QtCore.Qt.EditRole: 
      # implementar los seteos aca 
      return True 
     else: 
      return False 

    def columnCount(self, parent): 
     if parent.isValid(): 
      return parent.internalPointer().columnCount() 
     else: 
      return self.rootItem.columnCount() 

    def data(self, index, role): 
     if not index.isValid(): 
      return None 
     if role != QtCore.Qt.DisplayRole: 
      return None 

     item = index.internalPointer() 
     return item.data(index.column()) 

    def flags(self, index): 
     if not index.isValid(): 
      return QtCore.Qt.NoItemFlags 

     return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable 

    def headerData(self, section, orientation, role): 
     if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole: 
      return self.rootItem.data(section) 

    def index(self, row, column, parent): 
     #if row < 0 or column < 0 or row >= self.rowCount(parent) or column >= self.columnCount(parent): 
     if not self.hasIndex(row, column, parent): 
      return QtCore.QModelIndex() 

     if not parent.isValid(): 
      parentItem = self.rootItem 
     else: 
      parentItem = parent.internalPointer() 

     childItem = parentItem.child(row) 
     if childItem: 
      return self.createIndex(row, column, childItem) 
     else: 
      return QtCore.QModelIndex() 

    def parent(self, index): 
     if not index.isValid(): 
      return QtCore.QModelIndex() 

     childItem = index.internalPointer() 
     parentItem = childItem.parent() 

     if parentItem == self.rootItem: 
      return QtCore.QModelIndex() 

     return self.createIndex(parentItem.row(), 0, parentItem) 

    def rowCount(self, parent): 
     if parent.column() > 0: 
      return 0 

     if not parent.isValid(): 
      parentItem = self.rootItem 
     else: 
      parentItem = parent.internalPointer() 

     return parentItem.childCount() 

Answer 1

从评论由克里斯蒂安·佩雷斯

我看到了，我是从QAbstractTABLEModel而不是继承化QAbstractItemModel。当我改变它的时候，它工作。