python – 如何为代理模型处理的模型中的多个列设置项目委托？

我设置我的项目委托如下：

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))

将模型设置为代理模型的源模型后,我的应用程序崩溃但没有抛出任何错误：

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

当使用sortfilterproxymodel处理源模型时,我似乎只能使用一个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)

解决方法:

树视图不占用委托的所有权,因此您必须自己保留对它的引用(否则它将被python垃圾收集)：

    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)

标签：python,pyqt,pyqt5,qtreeview,qstyleditemdelegate
来源： https://codeday.me/bug/20190527/1163153.html