Исходный код EJIO.ctk_extender.widget.form.fields.textbox

## /ctk_extender/widget/form/fields/textbox.py

import customtkinter as ctk
from typing import Any
from ...base import Widget
from ...geometry import GeometryStrategy
from .base import InputField

__all__ = [
    'FormTextBox',
]




class FormTextBox(Widget, InputField):
    """Многострочное текстовое поле ввода для формы (на базе ctk.CTkTextbox)."""

    def __init__(
        self,
        parent: Any,
        name: str,
        required: bool = False,
        geometry: GeometryStrategy | None = None
    ) -> None:
        self._name: str = name
        self._required: bool = required
        super().__init__(parent, geometry)



    def build(self) -> ctk.CTkTextbox:
        return ctk.CTkTextbox(self.parent)


    @property
    def name(self) -> str:
        return self._name



    def get_value(self) -> str:
        # Извлекаем текст от первой строки и нулевого символа до самого конца,
        # обрезая дефолтный системный перенос строки (\n) на конце.
        return str(getattr(self.ctk_instance, 'get')("1.0", "end-1c"))




    def set_value(self, value: Any) -> None:
        instance = self.ctk_instance
        getattr(instance, 'delete')("1.0", "end")
        getattr(instance, 'insert')("1.0", str(value))




    def clear(self) -> None:
        getattr(self.ctk_instance, 'delete')("1.0", "end")




    def validate(self) -> str | None:
        if self._required and not self.get_value().strip():
            return f"Поле '{self._name}' не должно быть пустым."
        return None