Apply ThemedImageEffect to Window

src/Gemini/Framework/ShaderEffects/Converters/IsNullConverter.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Data;
+
+namespace Gemini.Framework.ShaderEffects.Converters
+{
+    // From https://github.com/MahApps/MahApps.Metro/blob/9c331aa20b2b3fd6a9426e0687cfc535511bf134/MahApps.Metro/Converters/IsNullConverter.cs
+
+    /// <summary>
+    /// Converts the value from true to false and false to true.
+    /// </summary>
+    public sealed class IsNullConverter : IValueConverter
+    {
+        private static IsNullConverter _instance;
+
+        // Explicit static constructor to tell C# compiler
+        // not to mark type as beforefieldinit
+        static IsNullConverter()
+        {
+        }
+
+        private IsNullConverter()
+        {
+        }
+
+        public static IsNullConverter Instance
+        {
+            get { return _instance ?? (_instance = new IsNullConverter()); }
+        }
+
+        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            return null == value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            return Binding.DoNothing;
+        }
+    }
+}

src/Gemini/Gemini.csproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -149,6 +149,7 @@
     <Compile Include="Framework\Services\IMainWindow.cs" />
     <Compile Include="Framework\Services\SettingsPropertyChangedEventManager.cs" />
     <Compile Include="Framework\ShaderEffects\Converters\BindingProxy.cs" />
+    <Compile Include="Framework\ShaderEffects\Converters\IsNullConverter.cs" />
     <Compile Include="Framework\ShaderEffects\Converters\SolidColorBrushToColorConverter.cs" />
     <Compile Include="Framework\ShaderEffects\GrayscaleEffect.cs" />
     <Compile Include="Framework\ShaderEffects\ShaderEffectBase.cs" />
@@ -472,7 +473,6 @@
   <ItemGroup>
     <Resource Include="Resources\Icons\FullScreen.png" />
   </ItemGroup>
-  <ItemGroup />
   <ItemGroup>
     <None Include="Framework\ShaderEffects\Scripts\ThemedImage.fx" />
   </ItemGroup>
@@ -484,4 +484,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>

src/Gemini/Themes/VS2013/Controls/Window.xaml

@@ -1,8 +1,12 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:system="clr-namespace:System;assembly=mscorlib"
+                    xmlns:shaderEffects="clr-namespace:Gemini.Framework.ShaderEffects"
+                    xmlns:converters="clr-namespace:Gemini.Framework.ShaderEffects.Converters"
                     xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls">
-
+    <converters:BindingProxy x:Key="DefaultBackground" Data="{DynamicResource MainWindowCaptionActiveBackground}"/>
+    <converters:SolidColorBrushToColorConverter x:Key="SolidColorBrushToColorConverter"/>
+
     <Style x:Key="MainWindowStyle" 
            TargetType="controls:MetroWindow"
            BasedOn="{StaticResource {x:Type controls:MetroWindow}}">
@@ -17,6 +21,24 @@
             <Trigger Property="IsActive" Value="False">
                 <Setter Property="TitleForeground" Value="{DynamicResource MainWindowCaptionInactiveText}" />
             </Trigger>
+            <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Icon, Mode=OneWay, Converter={x:Static converters:IsNullConverter.Instance}}" Value="False">
+                <Setter Property="IconTemplate">
+                    <Setter.Value>
+                        <DataTemplate>
+                            <controls:MultiFrameImage Width="{TemplateBinding Width}"
+                                              Height="{TemplateBinding Height}"
+                                              RenderOptions.BitmapScalingMode="{Binding IconBitmapScalingMode, Mode=OneWay, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type controls:MetroWindow}}}"
+                                              RenderOptions.EdgeMode="{Binding IconEdgeMode, Mode=OneWay, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type controls:MetroWindow}}}"
+                                              Source="{TemplateBinding Content}" >
+                                <controls:MultiFrameImage.Effect>
+                                    <shaderEffects:ThemedImageEffect Background="{Binding Converter={StaticResource SolidColorBrushToColorConverter}, Mode=OneWay,
+                                                                                          Source={StaticResource DefaultBackground}, Path=Data}"/>
+                                </controls:MultiFrameImage.Effect>
+                            </controls:MultiFrameImage>
+                        </DataTemplate>
+                    </Setter.Value>
+                </Setter>
+            </DataTrigger>
         </Style.Triggers>
     </Style>