Stretch width doesn't seem to be honored by pn.Column and pn.Row

Panel
1

The docs show:

pn.Row(
    pn.pane.Str(background='#f0f0f0', height=100, sizing_mode='stretch_width'),
    width_policy='max', height=200
)

That works, but what if I don’t want to have a pn.pane inside of the pn.Row? It seems like I should be able to simplify this down to something like:
pn.Row('Foo:',sizing_mode='stretch_width', width_policy='max', background='WhiteSmoke')
or
pn.Column('Foo:', sizing_mode='stretch_width', width_policy='max', background='WhiteSmoke')
but this doesn’t appear to work.

image
image735×149 13.6 KB

What am I missing?

2

If you pass a string to pn.Row it creates a pane which does not have sizing_mode passed to it. The pane can then be stretched afterwards, but this remove the elegance of what you are trying to do.

import panel as pn
pn.extension()

a = pn.Row('Foo:',sizing_mode='stretch_width', width_policy='max', background='WhiteSmoke')
a[0].sizing_mode = 'stretch_width'
a

Alternative you can change Row to panel like this: pn.panel('Foo:',sizing_mode='stretch_width', width_policy='max', background='WhiteSmoke')

1 Like
3

aha! I figured it had to do with panes somehow. I think it should warn when I pass it something that its going to get ignored. It would be good if the docs page had this info too.

Thank you!!

4

Please note you can change the default sizing_mode globally. I almost always do that.

pn.extension(sizing_mode="stretch_width")
1 Like