QPersistentModelIndex ¶

概要 ¶

详细描述 ¶

A QPersistentModelIndex is a model index that can be stored by an application, and later used to access information in a model. Unlike the QModelIndex class, it is safe to store a QPersistentModelIndex since the model will ensure that references to items will continue to be valid as long as they can be accessed by the model.

It is good practice to check that persistent model indexes are valid before using them.

注意

You cannot store a QStandardItemModel ‘s QPersistentModelIndex in one of the model’s items.

另请参阅

模型/视图编程 QModelIndex QAbstractItemModel

class QPersistentModelIndex ¶

QPersistentModelIndex(index)

QPersistentModelIndex(other)

参数

• other – QPersistentModelIndex

• index – QModelIndex

PySide2.QtCore.QPersistentModelIndex. child ( row , column ) ¶

参数

• row – int

• column – int

返回类型

QModelIndex

注意

此函数被弃用。

使用 index() 代替。

Returns the child of the model index that is stored in the given row and column .

另请参阅

parent() sibling()

PySide2.QtCore.QPersistentModelIndex. column ( ) ¶

返回类型

int

Returns the column this persistent model index refers to.

PySide2.QtCore.QPersistentModelIndex. data ( [ role=Qt.DisplayRole ] ) ¶

参数

role – int

返回类型

object

返回数据为给定 role for the item referred to by the index.

另请参阅

ItemDataRole setData()

PySide2.QtCore.QPersistentModelIndex. flags ( ) ¶

返回类型

ItemFlags

Returns the flags for the item referred to by the index.

PySide2.QtCore.QPersistentModelIndex. internalId ( ) ¶

返回类型

quintptr

PySide2.QtCore.QPersistentModelIndex. internalPointer ( ) ¶

返回类型

void

PySide2.QtCore.QPersistentModelIndex. isValid ( ) ¶

返回类型

bool

返回 true if this persistent model index is valid; otherwise returns false .

A valid index belongs to a model, and has non-negative row and column numbers.

另请参阅

model() row() column()

PySide2.QtCore.QPersistentModelIndex. model ( ) ¶

返回类型

QAbstractItemModel

Returns the model that the index belongs to.

PySide2.QtCore.QPersistentModelIndex. __ne__ ( other ) ¶

参数

other – QModelIndex

返回类型

bool

PySide2.QtCore.QPersistentModelIndex. __ne__ ( other ) ¶

参数

other – QPersistentModelIndex

返回类型

bool

PySide2.QtCore.QPersistentModelIndex. __lt__ ( other ) ¶

参数

other – QPersistentModelIndex

返回类型

bool

PySide2.QtCore.QPersistentModelIndex.operator=(other)

参数

other – QModelIndex

返回类型

QPersistentModelIndex

PySide2.QtCore.QPersistentModelIndex. __eq__ ( other ) ¶

参数

other – QModelIndex

返回类型

bool

PySide2.QtCore.QPersistentModelIndex. __eq__ ( other ) ¶

参数

other – QPersistentModelIndex

返回类型

bool

PySide2.QtCore.QPersistentModelIndex. parent ( ) ¶

返回类型

QModelIndex

Returns the parent QModelIndex for this persistent index, or an invalid QModelIndex if it has no parent.

另请参阅

sibling() model()

PySide2.QtCore.QPersistentModelIndex. row ( ) ¶

返回类型

int

Returns the row this persistent model index refers to.

PySide2.QtCore.QPersistentModelIndex. sibling ( row , column ) ¶

参数

• row – int

• column – int

返回类型

QModelIndex

Returns the sibling at row and column or an invalid QModelIndex if there is no sibling at this position.

另请参阅

parent()

PySide2.QtCore.QPersistentModelIndex. swap ( other ) ¶

参数

other – QPersistentModelIndex

Swaps this persistent modelindex with other 。此函数非常快，且从不失败。