Validators¶

Bases: QRegularExpressionValidator

Validator for camelCase without special characters or numbers.

This validator ensures input follows camelCase format: starts with a lowercase letter, followed by zero or more groups of an uppercase letter followed by lowercase letters.

Examples:

>>> from qtpy.QtWidgets import QLineEdit
>>> line_edit = QLineEdit()
>>> line_edit.setValidator(FXCamelCaseValidator())

Bases: QValidator

Validator for names that must start with a capital letter and contain only letters.

This validator ensures the first character is uppercase and all characters are alphabetic.

Examples:

>>> from qtpy.QtWidgets import QLineEdit
>>> line_edit = QLineEdit()
>>> line_edit.setValidator(FXCapitalizedLetterValidator())

Methods:

fixup(input_string: str) -> str

validate(input_string: str, pos: int)

Bases: QRegularExpressionValidator

Validator for letters and underscores, with optional numbers support.

Parameters:

Examples:

>>> from qtpy.QtWidgets import QLineEdit
>>> line_edit = QLineEdit()
>>> line_edit.setValidator(FXLettersUnderscoreValidator(allow_numbers=True))

Bases: QRegularExpressionValidator

Validator for lowercase letters only, with optional numbers and underscores support.

Parameters:

Examples:

>>> from qtpy.QtWidgets import QLineEdit
>>> line_edit = QLineEdit()
>>> line_edit.setValidator(FXLowerCaseValidator(allow_numbers=True))