我正在尝试让自定义 ListModel 工作并在 PyQt 中显示。然而,列表视图总是以空白结束。我检查了 UserModel.users 确实有它应该有的项目,并且 dataChanged 正确触发,但是没有显示任何内容。同时,数据中的 print(index) 从不输出任何东西,所以模型数据永远不会被调用?我错过了什么?
self.userList = QtWidgets.QListView()
self.userList.setModel(self.main.commandHandler.userList)
self.userList.show()
class UserModel(QAbstractListModel):
def __init__(self, parent=None):
QAbstractListModel.__init__(self, parent)
self.users = []
def rowCount(self, parent = None) :
if parent != None:
return 0
return len(self.users)
def flags(self):
return Qt.NoItemFlags
def data(self, index, role = Qt.DisplayRole ):
print(index)
name = self.users[index].name
if index.isValid():
if (role == Qt.DisplayRole):
return QVariant(name)
else:
return QVariant()
def addUser(self, payload):
user = User(payload)
l = len(self.users)
self.users.append(user)
self.dataChanged.emit(self.index(l, 0), self.index(l, 0))