Application.Resource inline code to find - wpf

Question

All,
I am trying to create a Metro Window Style. I have the style in Application.Resource file. I am trying to enable Dragging of the window in inline code. The problem is, when I have the style inside the Window XAML itself, I can access the properties of the Window. But in Application.Resource file, I loose the reference to the Window.
What I want to know is: how can I access the Window properties in inline code to which the style is applied to so I can apply the DragMove to the Window?
If this is not the right way then can I get the correct way of handling this problem please?
<Application.Resources>
<Style x:Key="MetroWindowStyle" TargetType="{x:Type Window}">
<Setter Property="WindowStyle" Value="None" />
<Setter Property="WindowChrome.WindowChrome">
<Setter.Value>
<WindowChrome ResizeBorderThickness="6" CaptionHeight="0" GlassFrameThickness="0" />
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Window}">
<Border x:Name="MainBorder" Background="#FFEEEEEE" BorderBrush="#FFA4A4A4" BorderThickness="1">
<DockPanel LastChildFill="True">
<Border x:Name="HeaderBorder" Height="30" Background="#FFE6E6E6" DockPanel.Dock="Top" MouseLeftButtonDown="HeaderBorder_MouseLeftButtonDown">
</Border>
<AdornerDecorator DockPanel.Dock="Bottom">
<ContentPresenter ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}"/>
</AdornerDecorator>
</DockPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<x:Code>
<![CDATA[
private void HeaderBorder_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
DragMove(); //////Complains here because I don't have access to the Window to which this style is applied to
}
]]>
</x:Code>
</Application.Resources>
Thanks

Answer 1

You could use an attached behaviour.
public class DraggableWindowBehaviour : Behavior<Window>
{
protected override void OnAttached()
{
AssociatedObject.PreviewMouseLeftButtonDown += _associatedObject_MouseLeftButtonDown;
}
private void _associatedObject_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
AssociatedObject.DragMove();
}
protected override void OnDetaching()
{
AssociatedObject.PreviewMouseLeftButtonDown -= _associatedObject_MouseLeftButtonDown;
}
}
Inside the Border control of your window control template:
<e:Interaction.Behaviors>
<b:DraggableWindowBehaviour/>
</e:Interaction.Behaviors>