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Adapter

New in version 1.5.

Note

The feature has been deprecated.

Warning

This code is still experimental, and its API is subject to change in a future version.

An Adapter is a bridge between data and an AbstractView or one of its subclasses, such as a ListView.

The following arguments can be passed to the contructor to initialise the corresponding properties:

  • data: for any sort of data to be used in a view. For an Adapter, data can be an object as well as a list, dict, etc. For a ListAdapter, data should be a list. For a DictAdapter, data should be a dict.
  • cls: the class used to instantiate each list item view instance (Use this or the template argument).
  • template: a kv template to use to instantiate each list item view instance (Use this or the cls argument).
  • args_converter: a function used to transform the data items in preparation for either a cls instantiation or a kv template invocation. If no args_converter is provided, the data items are assumed to be simple strings.

Please refer to the adapters documentation for an overview of how adapters are used.

class kivy.adapters.adapter.Adapter(**kwargs)[source]

Bases: kivy.event.EventDispatcher

An Adapter is a bridge between data and an AbstractView or one of its subclasses, such as a ListView.

args_converter

A function that prepares an args dict for the cls or kv template to build a view from a data item.

If an args_converter is not provided, a default one is set that assumes simple content in the form of a list of strings.

args_converter is an ObjectProperty and defaults to None.

cls

A class for instantiating a given view item (Use this or template). If this is not set and neither is the template, a Label is used for the view item.

cls is an ObjectProperty and defaults to None.

data

The data for which a view is to be constructed using either the cls or template provided, together with the args_converter provided or the default args_converter.

In this base class, data is an ObjectProperty, so it could be used for a wide variety of single-view needs.

Subclasses may override it in order to use another data type, such as a ListProperty or DictProperty as appropriate. For example, in a ListAdapter, data is a ListProperty.

data is an ObjectProperty and defaults to None.

get_cls()[source]

New in version 1.9.0.

Returns the widget type specified by self.cls. If it is a string, the Factory is queried to retrieve the widget class with the given name, otherwise it is returned directly.

template

A kv template for instantiating a given view item (Use this or cls).

template is an ObjectProperty and defaults to None.