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Add value_label parameter to Select-like widgets #6977

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Add value_label parameter to Select-like widgets #6977

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c89ee3f
Add value_label parameter to Select-like widgets
philippjfr Jul 12, 2024
d20952f
Small fixes
philippjfr Jul 12, 2024
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20 changes: 19 additions & 1 deletion panel/widgets/select.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,9 @@
CustomMultiSelect as _BkMultiSelect, CustomSelect,
RadioButtonGroup as _BkRadioButtonGroup, SingleSelect as _BkSingleSelect,
)
from ..util import PARAM_NAME_PATTERN, indexOf, isIn
from ..util import (
PARAM_NAME_PATTERN, edit_readonly, indexOf, isIn,
)
from ._mixin import TooltipMixin
from .base import CompositeWidget, Widget
from .button import Button, _ButtonBase
Expand Down Expand Up @@ -77,12 +79,18 @@ class SingleSelectBase(SelectBase):

value = param.Parameter(default=None)

value_label = param.String(allow_None=True, readonly=True)

_allows_values: ClassVar[bool] = True

_allows_none: ClassVar[bool] = False

_supports_embed: ClassVar[bool] = True

_rename: ClassVar[Mapping[str, str | None]] = {
'value_label': None,
}

__abstract = True

def __init__(self, **params):
Expand All @@ -91,6 +99,16 @@ def __init__(self, **params):
if self.value is None and None not in values and values and not self._allows_none:
self.value = values[0]

@param.depends('value', watch=True, on_init=True)
def _update_value_label(self):
try:
idx = indexOf(self.value, self.values)
label = self.labels[idx]
except ValueError:
label = None
with edit_readonly(self):
self.value_label = label

def _process_param_change(self, msg):
msg = super()._process_param_change(msg)
labels, values = self.labels, self.values
Expand Down
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