:vj|dZddlmZmZmZddlmZddlmZm Z m Z m Z Gdde Z eGdd eZ d ZeGd d e Zd Zy)z]Link and DirectionalLink classes. Propagate changes between widgets on the javascript side. )Widgetregisterwidget_serialization) CoreWidget)UnicodeTupleInstance TraitErrorc0eZdZdZdZfdZfdZxZS)WidgetTraitTuplez? ? r)r __module__ __qualname____doc__ info_textrr __classcell__rs@rr r sF/I#  rr ceZdZdZedj dZedj d ddieZ edj d ddieZ fd Z d Z xZ S) LinkzLink Widget source: a (Widget, 'trait_name') tuple for the source trait target: a (Widget, 'trait_name') tuple that should be updated LinkModelTrz&The target (widget, 'trait_name') pair)helprz&The source (widget, 'trait_name') pairc 8||d<||d<t|di|y)Nsourcetargetr)rr)rr5r6rrs rrz Link.__init__7s'!x!x "6"rc$|jy)N)close)rs runlinkz Link.unlink=s  rr)r r)r*r+rtag _model_namer rr6r5rr9r-r.s@rr0r0+sr +&***5K P #K L P P sVZ s^r sF P #K L P P sVZ s^r sF# rr0ct||S)aLink two widget attributes on the frontend so they remain in sync. The link is created in the front-end and does not rely on a roundtrip to the backend. Parameters ---------- source : a (Widget, 'trait_name') tuple for the first trait target : a (Widget, 'trait_name') tuple for the second trait Examples -------- >>> c = link((widget1, 'value'), (widget2, 'value')) )r0)attr1attr2s rjslinkr?As u rc@eZdZdZedj dZy)DirectionalLinkzA directional link source: a (Widget, 'trait_name') tuple for the source trait target: a (Widget, 'trait_name') tuple that should be updated when the source trait changes. DirectionalLinkModelTr2N)r r)r*r+rr:r;rrrrArATs" 015545@KrrAct||S)aLink a source widget attribute with a target widget attribute. The link is created in the front-end and does not rely on a roundtrip to the backend. Parameters ---------- source : a (Widget, 'trait_name') tuple for the source trait target : a (Widget, 'trait_name') tuple for the target trait Examples -------- >>> c = dlink((src_widget, 'value'), (tgt_widget, 'value')) )rA)r5r6s rjsdlinkrD_s 66 **rN)r+r%rrr widget_corer traitletsrr r r r r0r?rArDrrrrGsj ;:#::u8 : *& AdA A+r