QAbstractProxyModel ¶

概要 ¶

详细描述 ¶

This class defines the standard interface that proxy models must use to be able to interoperate correctly with other model/view components. It is not supposed to be instantiated directly.

All standard proxy models are derived from the QAbstractProxyModel class. If you need to create a new proxy model class, it is usually better to subclass an existing class that provides the closest behavior to the one you want to provide.

Proxy models that filter or sort items of data from a source model should be created by using or subclassing QSortFilterProxyModel .

To subclass QAbstractProxyModel , you need to implement mapFromSource() and mapToSource() 。 mapSelectionFromSource() and mapSelectionToSource() functions only need to be reimplemented if you need a behavior different from the default behavior.

注意

If the source model is deleted or no source model is specified, the proxy model operates on a empty placeholder model.

另请参阅

QSortFilterProxyModel QAbstractItemModel 模型/视图编程

class QAbstractProxyModel ( [ parent=None ] ) ¶

param parent

QObject

Constructs a proxy model with the given parent .

PySide2.QtCore.QAbstractProxyModel. mapFromSource ( sourceIndex ) ¶

参数

sourceIndex – QModelIndex

返回类型

QModelIndex

Reimplement this function to return the model index in the proxy model that corresponds to the sourceIndex from the source model.

另请参阅

mapToSource()

PySide2.QtCore.QAbstractProxyModel. mapSelectionFromSource ( selection ) ¶

参数

selection – QItemSelection

返回类型

QItemSelection

Returns a proxy selection mapped from the specified sourceSelection .

Reimplement this method to map source selections to proxy selections.

PySide2.QtCore.QAbstractProxyModel. mapSelectionToSource ( selection ) ¶

参数

selection – QItemSelection

返回类型

QItemSelection

Returns a source selection mapped from the specified proxySelection .

Reimplement this method to map proxy selections to source selections.

PySide2.QtCore.QAbstractProxyModel. mapToSource ( proxyIndex ) ¶

参数

proxyIndex – QModelIndex

返回类型

QModelIndex

Reimplement this function to return the model index in the source model that corresponds to the proxyIndex in the proxy model.

另请参阅

mapFromSource()

PySide2.QtCore.QAbstractProxyModel. setSourceModel ( sourceModel ) ¶

参数

sourceModel – QAbstractItemModel

设置给定 sourceModel to be processed by the proxy model.

Subclasses should call beginResetModel() at the beginning of the method, disconnect from the old model, call this method, connect to the new model, and call endResetModel() .

另请参阅

sourceModel()

PySide2.QtCore.QAbstractProxyModel. sourceModel ( ) ¶

返回类型

QAbstractItemModel

Returns the model that contains the data that is available through the proxy model.

另请参阅

setSourceModel()