Tabs not working

I can not place widgets on tabs in 0.12

from bokeh.models.widgets import Panel, Tabs,Toggle
from bokeh.io import output_file, output_server, show
from bokeh.plotting import figure

output_server("test")

startButton = Toggle(label="Start Test1",  button_type="success")
tab1 = Panel(child=startButton, title="circle")

startButton2 = Toggle(label="Start Test2",  button_type="success")
tab2 = Panel(child=startButton2, title="line")

tabs = Tabs(tabs=[ tab1, tab2 ])

show(tabs)

[AntonSavchenko]

Yup, doesn’t seem to work without at least one figure object…

If you really need only the widgets in tabs, I guess you could add a tiny empty figure:

from bokeh.layouts import widgetbox, row 

startButton = Toggle(label="Start Test1", button_type="success")
startButton2 = Toggle(label="Start Test2", button_type="success")
startButton3 = Toggle(label="Start Test3", button_type="success")

p=figure(plot_width=1,plot_height=1)
p.toolbar_location = None

tab1 = Panel(child=row(startButton,p), title="Start button")
tab2 = Panel(child=widgetbox(startButton2,startButton3), title="More Start buttons")

tabs = Tabs(tabs=[ tab1, tab2 ])

show(tabs)

[mattpap]

Well, 1x1 canvas is valid if min_border == 0 and there are no side panels. However, in any case, silent failure like this isn’t acceptable. For now I’ve been just throwing this exception whenever there are hard, unsatisfiable constraints, but this can and should be improved. I will hijack this issue to resolve that.