Add project files.

Nodify/Themes/Styles/DecoratorContainer.xaml

@@ -0,0 +1,25 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:local="clr-namespace:Nodify">
+
+    <local:UnscaleTransformConverter x:Key="UnscaleTransformConverter" />
+
+    <Style TargetType="{x:Type local:DecoratorContainer}">
+        <Setter Property="RenderTransform"
+                Value="{Binding ViewportTransform, RelativeSource={RelativeSource AncestorType=local:NodifyEditor}, Converter={StaticResource UnscaleTransformConverter}}" />
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="{x:Type local:DecoratorContainer}">
+                    <Border Background="{TemplateBinding Background}"
+                            BorderThickness="{TemplateBinding BorderThickness}"
+                            BorderBrush="{TemplateBinding BorderBrush}"
+                            Padding="{TemplateBinding Padding}"
+                            CornerRadius="3">
+                        <ContentPresenter />
+                    </Border>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+</ResourceDictionary>