Fixes cross selection disabled

[hoxbro]

Fixes #3325

This is done by calling self._update_disabled at the end of __init__

[codecov]

Codecov Report

Merging #3326 (64dd4b1) into master (fdbf05a) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3326      +/-   ##
==========================================
- Coverage   83.37%   83.35%   -0.03%     
==========================================
  Files         196      196              
  Lines       26541    26485      -56     
==========================================
- Hits        22129    22077      -52     
+ Misses       4412     4408       -4     

Impacted Files	Coverage Δ
panel/widgets/select.py	94.89% <100.00%> (+0.52%)	⬆️
panel/pane/plotly.py	81.90% <0.00%> (-3.08%)	⬇️
panel/pane/base.py	88.00% <0.00%> (-0.89%)	⬇️
panel/tests/pane/test_plotly.py	98.58% <0.00%> (-0.20%)	⬇️
panel/models/perspective.py	100.00% <0.00%> (ø)
panel/pane/perspective.py	59.53% <0.00%> (+5.38%)	⬆️

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[philippjfr]

I'd just add on_init=True to the depends decorator on _update_disabled.

[hoxbro]

I tried that, but it didn't work because the widgets are not created yet.

AttributeError: 'CrossSelector' object has no attribute '_buttons'

Traceback (most recent call last):
  File "/home/shh/miniconda3/envs/holoviz/lib/python3.8/site-packages/bokeh/application/handlers/code_runner.py", line 231, in run
    exec(self._code, module.__dict__)
  File "/home/shh/Development/holoviz/tmp.py", line 5, in <module>
    cross_selector = pn.widgets.CrossSelector(
  File "/home/shh/Development/holoviz/panel/panel/widgets/select.py", line 588, in __init__
    super().__init__(**params)
  File "/home/shh/Development/holoviz/panel/panel/widgets/base.py", line 137, in __init__
    super().__init__(**params)
  File "/home/shh/Development/holoviz/panel/panel/widgets/select.py", line 59, in __init__
    super().__init__(**params)
  File "/home/shh/Development/holoviz/panel/panel/widgets/base.py", line 54, in __init__
    super().__init__(**params)
  File "/home/shh/Development/holoviz/panel/panel/reactive.py", line 78, in __init__
    super().__init__(**params)
  File "/home/shh/Development/holoviz/panel/panel/viewable.py", line 544, in __init__
    super().__init__(**params)
  File "/home/shh/Development/holoviz/panel/panel/viewable.py", line 400, in __init__
    super().__init__(**params)
  File "/home/shh/Development/holoviz/panel/panel/viewable.py", line 231, in __init__
    super().__init__(**params)
  File "/home/shh/Development/holoviz/param/param/parameterized.py", line 3170, in __init__
    self.param._update_deps(init=True)
  File "/home/shh/Development/holoviz/param/param/parameterized.py", line 1727, in _update_deps
    m()
  File "/home/shh/Development/holoviz/param/param/parameterized.py", line 400, in _depends
    return func(*args, **kw)
  File "/home/shh/Development/holoviz/panel/panel/widgets/select.py", line 648, in _update_disabled
    self._buttons[False].disabled = self.disabled
AttributeError: 'CrossSelector' object has no attribute '_buttons'

[philippjfr]

Ah got it, need to be created before the constructor. This is fine, will merge.