[Feature request] NumericUpDown with a ValueLabel property

Is your feature request related to a problem? Please describe. Currently NumericUpDown allow a FormatString, but when used with custom text or units, it will mess the value when user edit the value on the box but not when they use the spinner alone, also not pratical and easy to mess up.

Describe the solution you’d like

• Have a property, like: ValueLabel that allow us to set whatever we want, eg: mm/min.
• ValueLabelPosition enum(Left, AfterValue, Right), with default to AfterValue

That way we can have a locked text that don’t mess with the input and with good integrated design Here an ugly sample i did, i just put a TextBox disabled after the NumericUpDown to illustrate the solution:

[maxkatz6]

I forgot to mention, it should be Template object:

<Style Selector="NumericUpDown /template/ TextBox">
        <Setter Property="InnerRightContent">
            <Template>
                <TextBox Text="mm"/>
            </Template>
        </Setter>
    </Style>

For example https://github.com/AvaloniaUI/Avalonia/blob/0b9cd49a11c4ef026d2ed6cf07e7aa718ba5a974/src/Avalonia.Themes.Default/TextBox.xaml#L110

[sn4k3]

Using custom control / classes