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- from dataclasses import dataclass
- from typing import Any, Callable, Dict, List, Optional, Union
- import justpy as jp
- from .choice_element import ChoiceElement
- @dataclass(frozen=True, eq=True)
- class Wrapper:
- value: tuple
- class Select(ChoiceElement):
- def __init__(self, options: Union[List, Dict], *,
- label: Optional[str] = None, value: Any = None, on_change: Optional[Callable] = None):
- """Dropdown Selection
- :param options: a list ['value1', ...] or dictionary `{'value1':'label1', ...}` specifying the options
- :param value: the initial value
- :param on_change: callback to execute when selection changes
- """
- view = jp.QSelect(options=options, label=label, input=self.handle_change, temp=False)
- super().__init__(view, options, value=value, on_change=on_change)
- def value_to_view(self, value: Any):
- if isinstance(value, list):
- value = tuple(value)
- matches = [o for o in self.view.options if o['value'] == value]
- if any(matches):
- return matches[0]['label']
- else:
- return value
- def handle_change(self, msg: Dict):
- msg['label'] = msg['value']['label']
- msg['value'] = msg['value']['value']
- if isinstance(self.view.options[0]['value'], tuple) and isinstance(msg['value'], list):
- msg['value'] = tuple(msg['value'])
- return super().handle_change(msg)
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