enh: Add header tooltip to Tabulator

[hoxbro]

I don't see any reason why this shouldn't be enabled all the time.

We likely need to update the CSS so the font type matches the tabulator font. Does not seem to be easy ref.

import pandas as pd
import panel as pn

pn.extension('tabulator')

data = {
    "This is a very long column name that should be truncated": [1, 2, 3],
    "Another extremely long header that will not fit normally": [4, 5, 6],
    "Short": [7, 8, 9]
}
pn.widgets.Tabulator(pd.DataFrame(data), widths=dict.fromkeys(data, 150)).servable()

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.07%. Comparing base (8492008) to head (ac58f3d).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7988   +/-   ##
=======================================
  Coverage   87.07%   87.07%           
=======================================
  Files         346      346           
  Lines       53374    53374           
=======================================
+ Hits        46473    46474    +1     
+ Misses       6901     6900    -1     

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[philippjfr]

Does it also show the tooltip for short column names?

[hoxbro]

Yes

[philippjfr]

As long as there is some reasonable delay on it I'm +1 on enabling it by default.

[hoxbro]

There is a delay.

[hoxbro]

Screencast.From.2025-06-18.11-56-16.mp4

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.