Mahapps.metro: Flat button style is theme-agnostic

[Foxtrek64]

Is your feature request related to a problem? Please describe.
The current flat button style is theme-agnostic. In Windows 10, these flat buttons style based on the selected theme. For those designing apps more in line with Win10, it would be nice to see a themed flat button style. Current behavior:

Light theme:

Dark theme:

Describe the solution you'd like
Add a ThemedFlatButton resource dictionary that styles the buttons as appropriate for Win10:

Additional context
I am currently using MahApps.Metro 1.6.5 with VS2019 on Win10 1809. The screenshot is above is from Visual Studio but that's not the only place themed flat buttons exist.

Edit: Current resource dictionaries:

<ResourceDictionary.MergedDictionaries>
    <!-- MahApps.Metro resource dictionaries. Make sure that all file names are Case Sensitive! -->
    <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" />
    <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/FlatButton.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/BaseDark.xaml" />
</ResourceDictionary.MergedDictionaries>

Buttons on above form:

<Button Grid.Column="1" 
        Margin="0 0 10 0"
        Padding="10 0"
        IsCancel="True" 
        Content="Cancel" />
<Button Grid.Column="2"
        Padding="10 0"
        IsDefault="True"
        Content="Create" />

Closed Issues

3118 fixes the Win81 style for the button.

[timunie]

See also #3328

[Nightro]

Totally agree on this, themed flat button would be the way to go.

[danielavilam]

Definitely I would to have this available. I was search for an themed flat button but the only "themed" button with MahApps.Metro, change the text case to lowercase, and that solid border ... no way.

[timunie]

Hi Together,
at the moment the main focus is on getting v2.0 released. So I think we have to wait for this implementation. Nevertheless you can override the Style with a custom one like the one blow:

<Style x:Key="My.Buttons.Styles.Win10.Accented"
       BasedOn="{StaticResource MahApps.Styles.Button.Flat}"
       TargetType="Button">
    <Setter Property="BorderThickness" Value="2" />
    <Setter Property="BorderBrush" Value="{DynamicResource MahApps.Brushes.Gray8}" />
    <Setter Property="Background" Value="{DynamicResource MahApps.Brushes.Gray8}" />
    <Setter Property="Foreground" Value="{DynamicResource MahApps.Brushes.Black}" />
    <Style.Triggers>
        <Trigger Property="IsMouseOver" Value="True">
            <Setter Property="BorderBrush" Value="{DynamicResource MahApps.Brushes.Accent}" />
            <Setter Property="Background" Value="{DynamicResource MahApps.Brushes.Gray8}" />
        </Trigger>
        <Trigger Property="IsPressed" Value="True">
            <Setter Property="BorderBrush" Value="{DynamicResource MahApps.Brushes.Accent}" />
            <Setter Property="Background" Value="{DynamicResource MahApps.Brushes.Accent}" />
        </Trigger>
    </Style.Triggers>
</Style>

Happy coding
Tim