B @\@sdZddlmZmZmZmZddlZeeZ ddl m Z ddl m Z ddlmZmZmZdZGd d d eZGd d d eZdddZdS)z Provides ``PropertyCallbackManager`` and ``EventCallbackManager`` mixin classes for adding ``on_change`` and ``on_event`` callback interfaces to classes. )absolute_importdivisionprint_functionunicode_literalsN) string_types)Event)get_param_infoformat_signature signature)EventCallbackManagerPropertyCallbackManagercs8eZdZdZfddZddZddZdd ZZS) r zs A mixin class to provide an interface for registering and triggering event callbacks on the Python side. cstt|j||t|_dS)N)superr __init__dict_event_callbacks)selfargskw) __class__:lib/python3.7/site-packages/bokeh/util/callback_manager.pyr3szEventCallbackManager.__init__cGst|tst|tr|j}x|D]}t|dddq W||jkrVdd|D|j|<n|j||||jkr||j |dS)N)eventzEvent callback)whatcSsg|]}|qSrr).0cbrrr ?sz1EventCallbackManager.on_event..) isinstancer issubclassr event_name_check_callbackrextendZsubscribed_eventsappend)rr callbackscallbackrrron_event7s   zEventCallbackManager.on_eventcCs<x6|j|jgD]"}|jdk r|j|jkr||qWdS)N)rgetrZ _model_idid)rrr$rrr_trigger_eventFsz#EventCallbackManager._trigger_eventcCs4|jdkrdSx |jD]}|jj||qWdS)N)ZdocumentrZ_subscribed_modelsadd)rkeyrrr_update_event_callbacksKs  z,EventCallbackManager._update_event_callbacks) __name__ __module__ __qualname____doc__rr%r(r+ __classcell__rr)rrr .s  r cs:eZdZdZfddZddZddZd d d ZZS) r zZ A mixin class to provide an interface for registering and triggering callbacks. cstt|j||t|_dS)N)rr rr _callbacks)rrr)rrrrYsz PropertyCallbackManager.__init__cGsRt|dkrtd|j|g}x*|D]"}||kr6q(t|d||q(WdS)z Add a callback on this object to trigger when ``attr`` changes. Args: attr (str) : an attribute name on this object callback (callable) : a callback function to register Returns: None rzSon_change takes an attribute name and one or more callbacks, got only one parameter)attroldnewN)len ValueErrorr1 setdefaultr r")rr2r#r1r$rrr on_change]s   z!PropertyCallbackManager.on_changecGs>t|dkrtd|j|g}x|D]}||q(WdS)z$ Remove a callback from this object rzZremove_on_change takes an attribute name and one or more callbacks, got only one parameterN)r5r6r1r7remove)rr2r#r1r$rrrremove_on_changeus   z(PropertyCallbackManager.remove_on_changeNc sJfdd}tdr@jdk r@j|||n|dS)z Trigger callbacks for ``attr`` on this object. Args: attr (str) : old (object) : new (object) : Returns: None cs.j}|r*x|D]}|qWdS)N)r1r&)r#r$)r2r4r3rrrinvokes  z/PropertyCallbackManager.trigger..invoke _documentN)hasattrr<Z_notify_change)rr2r3r4Zhintsetterr;r)r2r4r3rrtrigger}s zPropertyCallbackManager.trigger)NN) r,r-r.r/rr8r:r?r0rr)rrr Ss  r Callback functionscCsVt|}t|}|d}t|\}}t|t|t|krRt|d||fdS)z3Bokeh-internal function to check callback signaturez) must have signature func(%s), got func%sz, N)r r r r5r6join)r$ZfargsrZsigZformatted_argsZ error_msgZ all_namesZdefault_valuesrrrr s  r )r@)r/Z __future__rrrrZloggingZ getLoggerr,logZsixrZeventsrZ util.futurer r r __all__objectr r r rrrr s  %H