How to fix broken Hint padding in TextBoxes?

[michaldivis]

About 2 years ago, I've somehow broken the TextBox Text and Hint padding in my app. Does anyone have an idea on how to fix it? Here's what it looks like (there's a screenshot from a new app for comparison):

I've updated to the latest version of the MaterialDesignThemes (v4.5.0) and checked out the Getting Started guide in case something has changed.

Here's what's in my App.xaml:

<materialDesign:CustomColorTheme BaseTheme="Light" PrimaryColor="#007d40" SecondaryColor="#ff0000" />
<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />

I've removed out all other ResourceDictionaries containing custom styles.

And here's how I'm setting up my Windows:

<Window
    ...
    xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
    TextElement.Foreground="{DynamicResource MaterialDesignBody}"
    Background="{DynamicResource MaterialDesignPaper}"
    TextElement.FontWeight="Regular"
    TextElement.FontSize="13"
    FontFamily="{materialDesign:MaterialDesignFont}">
    ...
</Window>

And here's the XAML for the TextBox shown in the screenshot:

<TextBox
    Margin="5,5,5,25"
    materialDesign:HintAssist.HelperText="Some help text"
    materialDesign:HintAssist.Hint="Default TextBox" />

Any ideas? Thanks.

[michaldivis]

I've figured it out! Yaaay!

It was this ScrollViewer style that was causing the Hint padding problems.

<Style x:Key="MyScrollViewer" 
       TargetType="ScrollViewer">
    <Setter Property="HorizontalScrollBarVisibility" Value="Disabled" />
    <Setter Property="VerticalScrollBarVisibility" Value="Auto" />
</Style>
<Style BasedOn="{StaticResource MyScrollViewer}" TargetType="ScrollViewer" />

All I needed to do was add BasedOn="{StaticResource MaterialDesignScrollViewer}" and the Hint padding problem went away.

<Style
    x:Key="MyScrollViewer"
    BasedOn="{StaticResource MaterialDesignScrollViewer}"
    TargetType="ScrollViewer">
    <Setter Property="HorizontalScrollBarVisibility" Value="Disabled" />
    <Setter Property="VerticalScrollBarVisibility" Value="Auto" />
</Style>

<Style BasedOn="{StaticResource MyScrollViewer}" TargetType="ScrollViewer" />