[WIP] Use Microsoft.Windows.Shell instead of hand-coded solution for WinForms interop

MahApps.Metro/Behaviours/BorderlessWindowBehavior.cs

@@ -7,22 +7,35 @@
 using System.Windows.Media;
 using MahApps.Metro.Controls;
 using MahApps.Metro.Native;
+#if NET_4
+using Microsoft.Windows.Shell;
+#else
+using System.Windows.Shell;
+#endif
 
 namespace MahApps.Metro.Behaviours
 {
     public class BorderlessWindowBehavior : Behavior<Window>
     {
         public static readonly DependencyProperty ResizeWithGripProperty = DependencyProperty.Register("ResizeWithGrip", typeof(bool), typeof(BorderlessWindowBehavior), new PropertyMetadata(true));
         public static readonly DependencyProperty AutoSizeToContentProperty = DependencyProperty.Register("AutoSizeToContent", typeof(bool), typeof(BorderlessWindowBehavior), new PropertyMetadata(false));
-        public static readonly DependencyProperty EnableDWMDropShadowProperty =
-            DependencyProperty.Register("EnableDWMDropShadow", typeof(bool), typeof(BorderlessWindowBehavior), new PropertyMetadata(false, new PropertyChangedCallback((obj, args) =>
+        public static readonly DependencyProperty EnableDWMDropShadowProperty = DependencyProperty.Register("EnableDWMDropShadow", typeof(bool), typeof(BorderlessWindowBehavior), new PropertyMetadata(false));
+
+        public static readonly DependencyProperty AllowsTransparencyProperty =
+            DependencyProperty.Register("AllowsTransparency", typeof(bool), typeof(BorderlessWindowBehavior), new PropertyMetadata(true, new PropertyChangedCallback((obj, args) =>
             {
                 var behaviorClass = ((BorderlessWindowBehavior)obj);
 
                 if (behaviorClass.AssociatedObject != null)
-                    behaviorClass.AssociatedObject.AllowsTransparency = !(bool)args.NewValue;
+                    behaviorClass.AssociatedObject.AllowsTransparency = (bool)args.NewValue;
             })));
 
+        public bool AllowsTransparency
+        {
+            get { return (bool)GetValue(AllowsTransparencyProperty); }
+            set { SetValue(AllowsTransparencyProperty, value); }
+        }
+
         public bool EnableDWMDropShadow
         {
             get { return (bool)GetValue(EnableDWMDropShadowProperty); }
@@ -84,8 +97,9 @@ protected override void OnAttached()
                 AssociatedObject.SourceInitialized += AssociatedObject_SourceInitialized;
 
             AssociatedObject.WindowStyle = WindowStyle.None;
-            AssociatedObject.AllowsTransparency = !EnableDWMDropShadow;
+            AssociatedObject.AllowsTransparency = AllowsTransparency;
             AssociatedObject.StateChanged += AssociatedObjectStateChanged;
+            AssociatedObject.SetValue(WindowChrome.GlassFrameThicknessProperty, new Thickness(-1));
 
             if (AssociatedObject is MetroWindow)
             {
@@ -97,6 +111,10 @@ protected override void OnAttached()
                                                    Border = ancestors;
                                                    if (ShouldHaveBorder())
                                                        AddBorder();
+                                                   var titleBar = window.GetPart<Grid>("PART_TitleBar");
+                                                   titleBar.SetValue(WindowChrome.IsHitTestVisibleInChromeProperty, true);
+                                                   var windowCommands = window.GetPart<ContentPresenter>("PART_WindowCommands");
+                                                   windowCommands.SetValue(WindowChrome.IsHitTestVisibleInChromeProperty, true);
                                                };
 
                 switch (AssociatedObject.ResizeMode)
@@ -260,25 +278,22 @@ private IntPtr HwndHook(IntPtr hWnd, int message, IntPtr wParam, IntPtr lParam,
                     break;
                 case Constants.WM_NCPAINT:
                     {
-                        if (!ShouldHaveBorder())
+                        if (ShouldHaveBorder())
+                        {
+                            this.AddBorder();
+                        }
+                        else if (EnableDWMDropShadow)
                         {
-                            MetroWindow w = AssociatedObject as MetroWindow;
-                            if (!(w != null && w.GlowBrush != null))
+                            var metroWindow = AssociatedObject as MetroWindow;
+                            if (!(metroWindow != null && metroWindow.GlowBrush != null))
                             {
                                 var val = 2;
                                 UnsafeNativeMethods.DwmSetWindowAttribute(_mHWND, 2, ref val, 4);
                                 var m = new MARGINS { bottomHeight = 1, leftWidth = 1, rightWidth = 1, topHeight = 1 };
                                 UnsafeNativeMethods.DwmExtendFrameIntoClientArea(_mHWND, ref m);
                             }
-
-                            // i think we don't need this, cause after minimizing on taskbar, no border is shown
-                            //if (Border != null)
-                            //Border.BorderThickness = new Thickness(0);
-                        }
-                        else
-                        {
-                            AddBorder();
                         }
+
                         handled = true;
                     }
                     break;

MahApps.Metro/MahApps.Metro.csproj

@@ -26,15 +26,15 @@
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DefineConstants>TRACE;DEBUG;NET_4</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>none</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
+    <DefineConstants>TRACE;NET_4</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
@@ -43,6 +43,9 @@
     <AssemblyOriginatorKeyFile>mahapps.metro.pfx</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Microsoft.Windows.Shell">
+      <HintPath>..\packages\Microsoft.Windows.Shell.3.0.1.0\lib\net40\Microsoft.Windows.Shell.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Windows.Interactivity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -441,4 +444,4 @@
   </Target>
   -->
   <Target Name="AfterCompile" />
-</Project>
+</Project>

MahApps.Metro/MahApps.Metro.nuspec

@@ -22,4 +22,9 @@
     <file src="bin\Release\NET45\System.Windows.Interactivity.dll" target="lib\net45\System.Windows.Interactivity.dll" />
 	<file src="tools\install.ps1" target="tools\install.ps1" />
   </files>
+   <dependencies>
+      <group targetFramework="net40">
+        <dependency id="Microsoft.Windows.Shell" version="3.0.1.0" />
+      </group>
+    </dependencies>
 </package>

MahApps.Metro/packages.config

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="Microsoft.Windows.Shell" version="3.0.1.0" targetFramework="net40-Client" />
   <package id="MSBuildTasks" version="1.4.0.45" targetFramework="net40-Client" />
 </packages>

packages/Microsoft.Windows.Shell.3.0.1.0/Microsoft.Windows.Shell.3.0.1.0.nuspec

@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+  <metadata>
+    <id>Microsoft.Windows.Shell</id>
+    <version>3.0.1.0</version>
+    <title>Microsoft.Windows.Shell</title>
+    <authors>Gareth Evans</authors>
+    <owners>Gareth Evans</owners>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <description>Provides Windows Chrome and Taskbar integration facilities</description>
+    <releaseNotes />
+    <copyright />
+    <language />
+  </metadata>
+</package>

samples/MetroDemo/InteropDemo.xaml

@@ -0,0 +1,54 @@
+<controls:MetroWindow x:Class="MetroDemo.InteropDemo"
+                      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                      xmlns:controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
+                      xmlns:winForms="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
+                      xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
+                      xmlns:behaviours="clr-namespace:MahApps.Metro.Behaviours;assembly=MahApps.Metro"
+                      Title="Interop Demo" 
+                      Height="800" 
+                      Width="800">
+    <i:Interaction.Behaviors>
+        <behaviours:BorderlessWindowBehavior ResizeWithGrip="True" AllowsTransparency="False" />
+    </i:Interaction.Behaviors>
+
+    <Window.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colours.xaml" />
+                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
+                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
+                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Blue.xaml" />
+                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Window.Resources>
+    <Grid>
+        <Border BorderBrush="{DynamicResource AccentColorBrush}" Margin="10" BorderThickness="2">
+            <Grid>
+                <Grid.RowDefinitions>
+                    <RowDefinition Height="Auto" />
+                    <RowDefinition Height="*" />
+                </Grid.RowDefinitions>
+                <TextBlock Text="you should see google below"
+                           Grid.Row="0"
+                           FontSize="24" 
+                           Foreground="{DynamicResource BlackBrush}"
+                           HorizontalAlignment="Center" />
+                <WindowsFormsHost Grid.Row="1">
+                    <winForms:WebBrowser Url="http://www.google.com" />
+                </WindowsFormsHost>
+            </Grid>
+        </Border>
+        <!--<Border HorizontalAlignment="Center"
+                VerticalAlignment="Center"
+                Background="SkyBlue"
+                BorderBrush="DeepSkyBlue"
+                BorderThickness="1"
+                Opacity="0.5">
+            <TextBlock Margin="50"
+                       FontSize="24"
+                       Text="Hello Airspace" />
+        </Border>-->
+    </Grid>
+</controls:MetroWindow>

samples/MetroDemo/InteropDemo.xaml.cs

@@ -0,0 +1,10 @@
+namespace MetroDemo
+{
+    public partial class InteropDemo
+    {
+        public InteropDemo()
+        {
+            InitializeComponent();
+        }
+    }
+}

samples/MetroDemo/MainWindow.xaml

@@ -6,7 +6,7 @@
                       xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                       Title="MahApps.Metro.Demo"
-                      Width="800"
+                      Width="960"
                       Height="600"
                       Icon="mahapps.metro.logo2.ico"
                       ShowIconOnTitleBar="true"
@@ -44,6 +44,7 @@
             <Button Click="LaunchPanoramaDemo" Content="Panorama Demo" />
             <Button Click="LaunchIcons" Content="Icons" />
             <Button Click="LaunchRibbonDemo" Content="Ribbon Demo (.NET 4.5)" />
+            <Button Click="InteropDemo" Content="Interop Demo" />
         </Controls:WindowCommands>
     </Controls:MetroWindow.WindowCommands>
 

samples/MetroDemo/MainWindow.xaml.cs

@@ -117,5 +117,10 @@ private void FlipView_SelectionChanged(object sender, SelectionChangedEventArgs
                     break;
             }
         }
+
+        private void InteropDemo(object sender, RoutedEventArgs e)
+        {
+            new InteropDemo().Show();
+        }
     }
 }

samples/MetroDemo/MetroDemo.NET45.csproj

@@ -64,6 +64,7 @@
     <Reference Include="PresentationFramework.Aero" />
     <Reference Include="System" />
     <Reference Include="System.Data" />
+    <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Windows.Interactivity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\Lib\NET45\System.Windows.Interactivity.dll</HintPath>
@@ -79,6 +80,7 @@
     <Reference Include="WindowsBase" />
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
+    <Reference Include="WindowsFormsIntegration" />
   </ItemGroup>
   <ItemGroup>
     <ApplicationDefinition Include="App.xaml">
@@ -91,6 +93,9 @@
     <Compile Include="IconsWindow.xaml.cs">
       <DependentUpon>IconsWindow.xaml</DependentUpon>
     </Compile>
+    <Compile Include="InteropDemo.xaml.cs">
+      <DependentUpon>InteropDemo.xaml</DependentUpon>
+    </Compile>
     <Compile Include="MainWindowViewModel.cs" />
     <Compile Include="Models\Album.cs" />
     <Compile Include="Models\Artist.cs" />
@@ -106,6 +111,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="InteropDemo.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="MainWindow.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>

samples/MetroDemo/MetroDemo.csproj

@@ -50,6 +50,7 @@
     <Reference Include="PresentationFramework.Aero" />
     <Reference Include="System" />
     <Reference Include="System.Data" />
+    <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Windows.Interactivity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\Lib\NET40\System.Windows.Interactivity.dll</HintPath>
@@ -65,6 +66,7 @@
     <Reference Include="WindowsBase" />
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
+    <Reference Include="WindowsFormsIntegration" />
   </ItemGroup>
   <ItemGroup>
     <ApplicationDefinition Include="App.xaml">
@@ -77,6 +79,9 @@
     <Compile Include="IconsWindow.xaml.cs">
       <DependentUpon>IconsWindow.xaml</DependentUpon>
     </Compile>
+    <Compile Include="InteropDemo.xaml.cs">
+      <DependentUpon>InteropDemo.xaml</DependentUpon>
+    </Compile>
     <Compile Include="MainWindowViewModel.cs" />
     <Compile Include="Models\Album.cs" />
     <Compile Include="Models\Artist.cs" />
@@ -92,6 +97,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="InteropDemo.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
     <Page Include="MainWindow.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>