U Pe@sbdZddlmZmZmZddlmZddlmZdZ ddZ Gdd d e Z Gd d d e eZ d S) a RecycleView Data Model ====================== .. versionadded:: 1.10.0 The data model part of the RecycleView model-view-controller pattern. It defines the models (classes) that store the data associated with a :class:`~kivy.uix.recycleview.RecycleViewBehavior`. Each model (class) determines how the data is stored and emits requests to the controller (:class:`~kivy.uix.recycleview.RecycleViewBehavior`) when the data is modified. ) ListPropertyObservableDictObjectProperty)EventDispatcher)partial)RecycleDataModelBehaviorRecycleDataModelcCst|tst||dS||}|j|j|j}}}||krHtddS|dk r|dkr||ksdt|dkrztd||}t||}|dkrtd||}t||}t|||S|dkr||}|dkr||}|dks|dks||ks||ks||krdSt||S)Nr) isinstanceslicestartstopstepAssertionErrormaxmin)vallast_lennew_lenZdiffr r rrB/tmp/pip-unpacked-wheel-xzebddm3/kivy/uix/recycleview/datamodel.pyrecondition_slice_assigns0       rc@s8eZdZdZdZedddZddZdd Zd d Z dS) ra:class:`RecycleDataModelBehavior` is the base class for the models that describes and provides the data for the :class:`~kivy.uix.recycleview.RecycleViewBehavior`. :Events: `on_data_changed`: Fired when the data changes. The event may dispatch keyword arguments specific to each implementation of the data model. When dispatched, the event and keyword arguments are forwarded to :meth:`~kivy.uix.recycleview.RecycleViewBehavior.refresh_from_data`. )on_data_changedNT)Z allownonecCs||_|r|d|jdS)znAssociates a :class:`~kivy.uix.recycleview.RecycleViewBehavior` with this data model. rN) recycleviewfbindrefresh_from_dataselfrvrrrattach_recycleviewQsz+RecycleDataModelBehavior.attach_recycleviewcCs"|j}|r|d|jd|_dS)zxRemoves the :class:`~kivy.uix.recycleview.RecycleViewBehavior` associated with this data model. rN)rfunbindrrrrrdetach_recycleviewZsz+RecycleDataModelBehavior.detach_recycleviewcOsdSNr)rlargskwargsrrrrdsz(RecycleDataModelBehavior.on_data_changed) __name__ __module__ __qualname____doc__Z __events__rrrr!rrrrrr:s    rcs`eZdZdZegZdZfddZddZe ddZ fd d Z fd d Z d dZ ZS)raoAn implementation of :class:`RecycleDataModelBehavior` that keeps the data in a indexable list. See :attr:`data`. When data changes this class currently dispatches `on_data_changed` with one of the following additional keyword arguments. `none`: no keyword argument With no additional argument it means a generic data change. `removed`: a slice or integer The value is a slice or integer indicating the indices removed. `appended`: a slice The slice in :attr:`data` indicating the first and last new items (i.e. the slice pointing to the new items added at the end). `inserted`: a integer The index in :attr:`data` where a new data item was inserted. `modified`: a slice The slice with the indices where the data has been modified. This currently does not allow changing of size etc. rc s$|d|jtt|jf|dSNdata)r_on_data_callbacksuperr__init__)rr$ __class__rrr-szRecycleDataModel.__init__cCs |j|Sr")r*)rindexrrr __getitem__szRecycleDataModel.__getitem__cCstt|jj|S)zA dictionary instance, which when modified will trigger a `data` and consequently an `on_data_changed` dispatch. )rrr/r*)rrrrobservable_dictsz RecycleDataModel.observable_dictcs(tt|||r$|d|jddSr))r,rrr_dispatch_prop_on_sourcerr.rrrsz#RecycleDataModel.attach_recycleviewcs,|j}|r|d|jdtt|dSr))rr r3r,rr!rr.rrr!sz#RecycleDataModel.detach_recycleviewcCs|j}t|j}|_|j\}}|dkrZt|||}|dk rL|jd|dn |dn4|dkrt|jd|dn|dkrtt|||}|dk r|jd|dn |dn|dkr|jdt|dn|dks|d kr|jdt||d n|d kr|jdt||d n||d kr,|jd|d nb|dkrd|rP|jd|ddn|jd|ddn*|dkr|jdt||d n |ddS)N __setitem__r)modified __delitem__)removedZ __setslice__Z __delslice____iadd____imul__)Zappendedappendinsert)Zinsertedpoprr extend) _last_lenlenr*Zlast_oprdispatchr )rinstancevaluerroprrrrr+s<       z"RecycleDataModel._on_data_callback)r%r&r'r(rr*r>r-r1propertyr2rr!r+ __classcell__rrr.rrhs    rN)r(Zkivy.propertiesrrrZ kivy.eventr functoolsr__all__robjectrrrrrrs  #.