MaterialDesignSwitchToggleButton background colour is hardcoded

[wwarby]

As best I can tell, the background colour on the "track" for the switch-style toggle button is hardcoded to Black. Since my app's background colour is close to black, this makes the default style of the switch toggle button unusable. I've tried to override the default style, so far without success - this is probably because I don't understand XAML style inheritance well enough to target the property correctly, but I wonder if perhaps it shouldn't be hardcoded to Black anyway, especially if the selected theme is Dark? What would be great is if it could just inherit the Background brush for the ToggleButton itself. This was my failed attempt at overriding:

  <Style x:Key="MaterialDesignSwitchToggleButton" TargetType="{x:Type ToggleButton}" BasedOn="{StaticResource MaterialDesignSwitchToggleButton}">
    <Style.Resources>
      <Style TargetType="{x:Type Rectangle}">
        <Setter Property="Fill" Value="Red" />
      </Style>
    </Style.Resources>
  </Style>

[Keboo]

For this we should do the following:

• Add a new attached property in ToggleButtonAssist called SwitchTrackBackground of type Brush. It should default to Black
• Use this new attached property as the Fill for the rectangle on the MaterialDesignSwitchToggleButton
• Update the demo app so one of the switches shows off changing this color.

[laxmy]

Hi @Keboo ,
Can I pick this up?

[Keboo]

@laxmy yes all yours.

[laxmy]

Hi @Keboo ,
I've raised a PR. Please review