Added notification icon fallback support

src/TheXamlGuy.NotificationFlyout.Shared.UI/TheXamlGuy.NotificationFlyout.Shared.UI.csproj

@@ -21,4 +21,9 @@
     <PackageReference Include="System.Drawing.Common" Version="6.0.0-preview.1.21102.12" />
     <PackageReference Include="System.Memory" Version="4.5.4" />
   </ItemGroup>
+
+  <PropertyGroup>
+    <EnableTypeInfoReflection>false</EnableTypeInfoReflection>
+    <EnableXBindDiagnostics>false</EnableXBindDiagnostics>
+  </PropertyGroup>
 </Project>

src/TheXamlGuy.NotificationFlyout.Uwp.UI.Controls/NotificationFlyoutHost/NotificationFlyoutHost.cs

@@ -46,11 +46,6 @@ namespace TheXamlGuy.NotificationFlyout.Uwp.UI.Controls
             flyout.Hide();
         }
 
-        internal void UpdateThemeVisualState()
-        {
-
-        }
-
         public void SetFlyoutPlacement(string placement)
         {
             if (!_isLoaded)
@@ -73,7 +68,7 @@ namespace TheXamlGuy.NotificationFlyout.Uwp.UI.Controls
             });
         }
 
-        internal void SetOwningFlyout(NotificationFlyout flyout)
+        public void SetOwningFlyout(NotificationFlyout flyout)
         {
             _notificationFlyout = flyout;
 
@@ -103,12 +98,8 @@ namespace TheXamlGuy.NotificationFlyout.Uwp.UI.Controls
                 });
         }
 
-        private NotificationFlyoutPresenter _flyoutPresenter;
-
         protected override void OnApplyTemplate()
         {
-            _flyoutPresenter = GetTemplateChild("FlyoutPresenter") as NotificationFlyoutPresenter;
-
             _flyout = GetTemplateChild("Flyout") as Flyout;
             if (_flyout != null)
             {

src/TheXamlGuy.NotificationFlyout.Wpf.UI.Controls/NotificationFlyout/NotificationFlyoutXamlHost.cs

@@ -5,6 +5,9 @@ using TheXamlGuy.NotificationFlyout.Wpf.UI.Extensions;
 using System;
 using System.Windows;
 using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Controls;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
 
 namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Controls
 {
@@ -105,20 +108,7 @@ namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Controls
 
         private void OnTaskbarChanged(object sender, EventArgs args) => UpdateWindow();
 
-        private void OnThemeChanged(object sender, SystemPersonalisationChangedEventArgs args)
-        {
-            UpdateFlyoutTheme(args.IsColorPrevalence);
-            UpdateIcons();
-        }
-
-        private void UpdateFlyoutTheme(bool isColorPrevalence)
-        {
-            var content = GetHostContent();
-            if (content != null)
-            {
-             //   content.UpdateFlyoutTheme(isColorPrevalence);
-            }
-        }
+        private void OnThemeChanged(object sender, SystemPersonalisationChangedEventArgs args) => UpdateIcons();
 
         private void PrepareContextMenu()
         {
@@ -168,18 +158,23 @@ namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Controls
             if (!IsLoaded) return;
             if (_flyout == null) return;
 
-            var iconSource = _flyout.IconSource;
-            var lightIconSource = _flyout.LightIconSource;
-
             var shellTrayHandle = WindowHelper.GetHandle(ShellTrayHandleName);
             if (shellTrayHandle == null) return;
 
-            var desiredIconSource = _systemPersonalisationHelper.Theme == SystemTheme.Dark ? iconSource : lightIconSource;
-            if (desiredIconSource == null) return;
-
             var dpi = WindowHelper.GetDpi(shellTrayHandle);
-            using var icon = await desiredIconSource.ConvertToIconAsync(dpi);
-            _notificationIconHelper.SetIcon(icon.Handle);
+
+            var desiredIconSource = _systemPersonalisationHelper.Theme == SystemTheme.Dark ? _flyout.IconSource : _flyout.LightIconSource;
+            if (desiredIconSource == null)
+            {
+                var fallbackIconSource = new BitmapImage(new Uri($"pack://application:,,,/{GetType().Namespace};component/Assets/notification-icon-{(_systemPersonalisationHelper.Theme == SystemTheme.Dark ? "default" : "light")}.ico"));
+                using var icon = fallbackIconSource.ConvertToIcon(dpi);
+                _notificationIconHelper.SetIcon(icon.Handle);
+            }
+            else
+            {
+                using var icon = await desiredIconSource.ConvertToIconAsync(dpi);
+                _notificationIconHelper.SetIcon(icon.Handle);
+            }
         }
 
         private void UpdateWindow()

src/TheXamlGuy.NotificationFlyout.Wpf.UI.Controls/TheXamlGuy.NotificationFlyout.Wpf.UI.Controls.csproj

@@ -12,6 +12,11 @@
     <Version>1.0.0</Version>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Remove="Assets\notification-icon-default.ico" />
+    <None Remove="Assets\notification-icon-light.ico" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="Microsoft.Toolkit.Wpf.UI.XamlHost" Version="6.1.2" />
   </ItemGroup>
@@ -22,6 +27,11 @@
     <ProjectReference Include="..\TheXamlGuy.NotificationFlyout.Wpf.UI\TheXamlGuy.NotificationFlyout.Wpf.UI.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Resource Include="Assets\notification-icon-light.ico" />
+    <Resource Include="Assets\notification-icon-default.ico" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Update="Microsoft.VCRTForwarders.140" Version="1.0.7" />
   </ItemGroup>

src/TheXamlGuy.NotificationFlyout.Wpf.UI.Controls/XamlHost/XamlHost.cs

@@ -23,6 +23,7 @@ namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Controls
 
         protected virtual void OnContentLoaded()
         {
+            
         }
 
         protected virtual WindowsXamlHost OnPreparingXamlHost(WindowsXamlHost xamlHost)

src/TheXamlGuy.NotificationFlyout.Wpf.UI/Extensions/ImageSourceExtensions.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Drawing;
+using System.Windows;
+using System.Windows.Media;
+using Microsoft.Windows.Sdk;
+
+namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Extensions
+{
+    public static class ImageSourceExtensions
+    {
+        public static Icon ConvertToIcon(this ImageSource imageSource, uint dpi)
+        {
+            if (imageSource == null) return null;
+
+            var uri = new Uri(imageSource.ToString(), UriKind.RelativeOrAbsolute);
+
+            var streamResource = Application.GetResourceStream(uri);
+            if (streamResource == null) throw new ArgumentException(nameof(streamResource));
+
+            return new Icon(streamResource.Stream, new System.Drawing.Size(PInvoke.GetSystemMetricsForDpi((int)SystemMetricFlag.SM_CXICON, dpi), PInvoke.GetSystemMetricsForDpi((int)SystemMetricFlag.SM_CYICON, dpi)));
+        }
+
+        private enum SystemMetricFlag : int
+        {
+            SM_CXICON = 11,
+            SM_CYICON = 12,
+            SM_CXSMICON = 49,
+            SM_CYSMICON = 50
+        }
+    }
+}

src/TheXamlGuy.NotificationFlyout.Wpf.UI/NativeMethods.txt

@@ -0,0 +1 @@
+

src/TheXamlGuy.NotificationFlyout.Wpf.UI/TheXamlGuy.NotificationFlyout.Wpf.UI.csproj

@@ -11,6 +11,13 @@
     <Version>1.0.0</Version>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.1.319-beta">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\TheXamlGuy.NotificationFlyout.Shared.UI\TheXamlGuy.NotificationFlyout.Shared.UI.csproj" />
   </ItemGroup>