software trigger of a Button or Toggle on js side

chupach1Apr 28, 2017 #1

Hi,
this is maybe not possible, bokeh is not fully bidirectional (?), but is there a way to perform a software trigger from python side to trigger the js callback ?

For instance with a Toggle, the python callback is called but not the js callback:

bb = Toggle()

bb.js_on_change(‘active’,CustomJS(code=""“console.log(‘clicked’);”""))

def bb_cb(attr,old,new): print(‘bb cb called’,attr,old,new)

bb.on_change(‘active’,bb_cb)

bb.active=True

I tried also update & trigger methods on bb. Not really knowing what i’m doing…no success

thx

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BryanApr 29, 2017 #2

Bokeh synchronizes property values bi-directionally. Having something like a (very lightweight) "RPC" mechanism is an open issue:

Events with feedback / Simple RPC · Issue #5983 · bokeh/bokeh · GitHub

The best way to trigger JS code from python right now is probably to "fake it" e.g. you could add a bogus glyph that is invisible, and attach JS callbacks to some of its properties. Then to trigger the JS code from python you can change the property values (to whatever).

Thanks,

Bryan

···

On Apr 28, 2017, at 12:50, chupach <mathieur1507@gmail.com> wrote:

Hi,
this is maybe not possible, bokeh is not fully bidirectional (?), but is there a way to perform a software trigger from python side to trigger the js callback ?
For instance with a Toggle, the python callback is called but not the js callback:

bb = Toggle()

bb.js_on_change('active',CustomJS(code="""console.log('clicked');"""))

def bb_cb(attr,old,new): print('bb cb called',attr,old,new)
bb.on_change('active',bb_cb)

bb.active=True

I tried also update & trigger methods on bb. Not really knowing what i'm doing...no success
thx

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