Provide more control over the `TextField`'s borders

[ndonkoHenri]

Discussed in https://github.com/flet-dev/flet/discussions/4136

^{Originally posted by MatsuSpring October 11, 2024}

Question

I'm trying to change the color of the underline in a TextField control where the border property is set to ft.InputBorder.UNDERLINE. However, even when I try to change the color using the border_color property as shown in the code below, the underline color remains the same.

Is this a known limitation of Flet, or am I missing something? Does anyone have any suggestions or solutions?

(Apologies if the English translation is a bit awkward, as it was generated by Gemini.)

Code sample

import flet as ft

def main(page: ft.Page):
    tf = ft.TextField(
        label="Input Name",
        border=ft.InputBorder.UNDERLINE,
        border_color=ft.colors.ORANGE
    )

    page.add(tf)

ft.app(main)

Error message

No response

------------------------------------------------------

• [X] I have searched for answers to my question both in the issues and in previous discussions.