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58 lines
1.8 KiB
Python
58 lines
1.8 KiB
Python
"""
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Author: Dogeek
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License: GNU GPLv3
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Source: This repository
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ValidatedEntry widget using validators to check the input against specific patterns.
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"""
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import tkinter.ttk as ttk
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from .validators import Validator
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class ValidatedEntry(ttk.Entry):
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"""
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ValidatedEntry base class.
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An entry that has a VALIDATOR class attribute.
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Set it to a validator class from `ttkwidgets.validated_entries.validators`
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The entry won't accept input that has not been validated.
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"""
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VALIDATOR = None
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def _get_validator(self, validator=None):
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"""
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Gets a validator instance from either the VALIDATOR class attribute
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or the validator keyword argument.
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:keyword validator: defaults None. A Validator class or instance.
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:type validator: `ttkwidgets.validated_entries.validators.Validator`, `type`
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:raises: TypeError if the validator is None, or is not of type `Validator`
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:returns: a Validator instance
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:rtype: `ttkwidgets.validated_entries.validators.Validator`
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"""
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validator = validator or self.VALIDATOR
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if validator is None:
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raise TypeError('No validator found.')
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if isinstance(validator, type):
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validator = validator()
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if not isinstance(validator, Validator):
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raise TypeError("Variable `validator` doesn't have type 'Validator'")
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return validator
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def configure_validator(self, validator=None):
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"""
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Configures the validator on this entry. See `ValidatedEntry._get_validator`
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for more info.
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"""
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existing_config = {k: self.config(k)[-1] for k in ('validate', 'validatecommand')}
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validator = self._get_validator(validator)
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new_config = validator.validate(self)
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new_config.update(existing_config)
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self.config(new_config)
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