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falkoschindler avatar falkoschindler commented on May 28, 2024 1

I think the backward binding is working. Here is an example where button clicks trigger the value changes:

data = {'A': 1}
input = ui.number().bind_value(data, "A")
ui.label().bind_text_from(data, 'A')
ui.label().bind_text_from(input, 'value')

ui.button('Input := 2', on_click=lambda: input.set_value(2))
ui.button('Data := 3', on_click=lambda: data.update(A=3))
ui.button('Input := 4', on_click=lambda: input.set_value(4))

The problem with the original code is probably a timing issue: After setting the data value to 3, the binding needs some time to propagate its value. But the label is added synchronously, so the binding loop didn't get a chance to do that yet and the input value is still 2. When setting the input value to 4, the value is propagated immediately (because the value is a BindableProperty) and both values are 4.

from nicegui.

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