How to access the widget's frame size

[GrootCHENN]

Question

How to access the widget's frame size when using the 'flex layout'? I am using the padding and expend to comfirm the widget size, and now i wanna to know a widget's frame properties like width, height.
I'm trying to use the Control Ref to get what i want, but it return 'None', and if i try to get height for text_container_ref, it return 56 just like what i set.

Code sample

self.form_header_view = ft.Container(
            ref=self.text_container_ref,
            height=56,
            bgcolor=Common.gray_background,
            border_radius=ft.border_radius.only(topLeft=16, topRight=16),
            padding=ft.padding.symmetric(horizontal=self.form_padding),
            content=ft.Row(
                expand=True,
                spacing=0,
                alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
                controls=[
                    self.form_header_text(name=header) for header in self.headers
                ]
            )
        )
    def form_header_text(self, name: str):
        return ft.Container(
            width=int(self.text_container_ref.current.width - (2*self.form_padding) / len(self.headers)),
            bgcolor="RED",
            content=ft.Text(
                expand=True,
                value=name,
                color=Common.title_text_default_color,
                size=14,
                weight=ft.FontWeight.BOLD
            )
        )

Error message

No response

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

[iron3oxide]

Have a look at #1094, it's a draft, but probably what you're looking for.