DependencyProperty as trigger value - wpf

Question

I am trying to stylize my application Button with custom DependencyProperty
The dependency declaration:
public static class Button
{
public static readonly DependencyProperty BackgroundHoverProperty;
static Button()
{
BackgroundHoverProperty = DependencyProperty.RegisterAttached(
"BackgroundHover",
typeof(Brush),
typeof(Button),
new PropertyMetadata(Application.Current.FindResource("Mask.Hover")));
}
public static Brush GetBackgroundHover(DependencyObject obj)
{
return (Brush)obj.GetValue(BackgroundHoverProperty);
}
public static void SetBackgroundHover(DependencyObject obj, Brush value)
{
obj.SetValue(BackgroundHoverProperty, value);
}
}
The button style:
<Style TargetType="Button">
<Setter Property="Background" Value="Transparent" />
<Setter Property="BorderBrush" Value="{StaticResource Border.Default}" />
<Setter Property="BorderThickness" Value="0" />
<Setter Property="TextElement.Foreground" Value="{StaticResource Foreground.Default}" />
<Setter Property="Padding" Value="1" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="controls:Button.BackgroundHover" Value="Blue" />
<Setter Property="Template" Value="{StaticResource ButtonTemplate}" />
</Style>
the button template:
<ControlTemplate x:Key="ButtonTemplate" TargetType="Button">
<Grid>
<Border
x:Name="Border"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
SnapsToDevicePixels="True" />
<ContentPresenter
x:Name="Content"
RecognizesAccessKey="True"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
ContentStringFormat="{TemplateBinding ContentStringFormat}"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
Focusable="False" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter
Property="Background"
TargetName="Border"
Value="{Binding (controls:Button.BackgroundHover), // <--- Here is the binding
RelativeSource={RelativeSource Self}}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
I can't find out what I am doing wrong.
Edit: I have also tried RelativeSource={RelativeSource TemplatedParent} and still no result.

Answer 1

Change {RelativeSource Self} to {RelativeSource TemplatedParent}:
Value="{Binding (controls:Button.BackgroundHover),
RelativeSource={RelativeSource TemplatedParent}}"