如何在由代理模型处理的模型中为多个列设置项目代表？

Question

设置我的项目的代表，像这样：该模型被设置为代理模式的源模型

COMBOBOX_ITEMS_FRUITS = ['Apple', 'Banana'] 
COMBOBOX_ITEMS_COLORS = ['Red', 'Green', 'Blue'] 

self.treeview.setItemDelegateForColumn(COLUMN_A, ComboBoxDelegate(COMBOBOX_ITEMS_FRUITS)) 
self.treeview.setItemDelegateForColumn(COLUMN_B, ComboBoxDelegate(COMBOBOX_ITEMS_COLORS)) 

后，我的应用程序崩溃，但被抛出没有任何错误：

self.model_source = treeview_model 
self.sf_proxy_model.setSourceModel(self.model_source) 

看来，当使用sortfilterproxymodel来处理源模型时，我只能使用一个setItemDelegateForColumn。

ComboBoxDelegate定义如下：

class ComboBoxDelegate(QStyledItemDelegate): 
    def __init__(self, items): 
     super(ComboBoxDelegate, self).__init__() 

     self.items = items 

    def createEditor(self, parent, option, index): 
     editor = QComboBox(parent) 
     editor.setAutoFillBackground(True) 

     for item in self.items: 
      editor.addItem(item) 

     return editor 

    def setEditorData(self, editor, index): 
     current_index = editor.findText(index.model().data(index), Qt.MatchExactly) 
     editor.setCurrentIndex(current_index) 

    def setModelData(self, editor, model, index): 
     item_index = model.mapToSource(index) 
     item = model.sourceModel().item(item_index.row(), 0) 

     if index.parent().row() == -1 and item.hasChildren(): 
      for row in range(item.rowCount()): 
       child = item.child(row, 3) 
       child.setText(editor.currentText()) 

     model.setData(index, editor.currentText()) 

    def updateEditorGeometry(self, editor, option, index): 
     editor.setGeometry(option.rect) 

Answer 1

树形视图不采取委托的所有权，所以你必须保持对它的引用自己（否则会被垃圾收集蟒蛇）：

self.delegate1 = ComboBoxDelegate(COMBOBOX_ITEMS_FRUITS) 
    self.delegate2 = ComboBoxDelegate(COMBOBOX_ITEMS_COLORS) 
    self.view.setItemDelegateForColumn(COLUMN_A, self.delegate1) 
    self.view.setItemDelegateForColumn(COLUMN_B, self.delegate2)