Just add this to Your MetroWindow:
<Controls:NumericUpDown Value="40"
Controls:TextBoxHelper.Watermark="Watermark:"
Controls:TextBoxHelper.UseFloatingWatermark="True" />
With those styles:
xaml
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colors.xaml" />
<!-- Accent and AppTheme setting -->
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Blue.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
</ResourceDictionary.MergedDictionaries>```
In this case Floating watermark shows only after pressing plus or minus button.
In my opinion it should work like in TextBox (if value !=null then it's visible)...
@AndrzejKl thx for reporting, fixed with 1c6480d647ddb39b2fafd4e28ea157a82a006e88
@punker76 Thx, also TextBoxHelper properties aren't visible in Intelisearch in visual Studio for NumericUpDown, like for TextBoxes. It's possible to fix that, R not?
@AndrzejKl really?

@punker76 Yes, really:

@AndrzejKl Is this v1.2.4 ? Can you try the latest pre-release? (note: my last changes are only available tomorrow)
@punker76 With 1.3.0.153 (via Nuget) it looks like this:

Under CleartextButton, are only 2 more properties: "SelectAllOnFocus" and "TextButton"
@AndrzejKl Ah, it's not showing, cause you have the Watermark and UseFloatingWatermark already choosen...
@punker76 Nope:

Btw: Maybe here it's a problem. After chose prerelase version, I have in Designer 2 errors:

But I can run it without problems...
@AndrzejKl @drunkvs try closing vs, deleting obj/bin folders, reopen your solution and rebuild your stuff...
@punker76 Thx, errors R gone, but still no watermark and other options in InteliSense...
@AndrzejKl Ok, found it, 1.3.0-ALPHA154 (available tomorrow) will contain the fix for it
THX!
BTW: This project is really nice, good job!
Most helpful comment
THX!
BTW: This project is really nice, good job!