fix issue with DPI

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

@@ -7,6 +7,7 @@ using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Controls.Primitives;
 using Windows.UI.Xaml.Input;
 using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Shapes;
 
 namespace TheXamlGuy.NotificationFlyout.Uwp.UI.Controls
 {
@@ -226,8 +227,26 @@ namespace TheXamlGuy.NotificationFlyout.Uwp.UI.Controls
         }
         internal void UpdateTheme(bool isColorPrevalence) => VisualStateManager.GoToState(this, isColorPrevalence ? "ColorPrevalenceTheme" : "DefaultTheme", true);
 
+        private Rectangle _topThumb;
+        private Grid _layoutRoot;
+
+        protected override void OnManipulationDelta(ManipulationDeltaRoutedEventArgs e)
+        {
+            base.OnManipulationDelta(e);
+        }
         protected override void OnApplyTemplate()
         {
+            _layoutRoot = GetTemplateChild("LayoutRoot") as Grid;
+            _layoutRoot.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
+
+            _topThumb = GetTemplateChild("TopThumb") as Rectangle;
+            _topThumb.ManipulationMode = ManipulationModes.TranslateX | ManipulationModes.TranslateY;
+
+            _topThumb.ManipulationDelta += _topThumb_ManipulationDelta;
+            _topThumb.PointerPressed += _topThumb_PointerPressed;
+            _topThumb.PointerReleased += _topThumb_PointerReleased;
+
+
             _container = GetTemplateChild("Container") as Border;
             if (_container != null)
             {
@@ -255,6 +274,33 @@ namespace TheXamlGuy.NotificationFlyout.Uwp.UI.Controls
             }
         }
 
+        private void _topThumb_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
+        {
+            _layoutRoot.Height = _layoutRoot.ActualHeight;
+            _layoutRoot.Height -= e.Delta.Translation.Y ;
+
+            _popup.SetValue(Popup.VerticalOffsetProperty, _popup.VerticalOffset += e.Delta.Translation.Y);
+        }
+
+        private void _topThumb_PointerReleased(object sender, PointerRoutedEventArgs e)
+        {
+           // XamlRoot.Content.ReleasePointerCapture(e.Pointer);
+        }
+
+        private void _topThumb_PointerPressed(object sender, PointerRoutedEventArgs e)
+        {
+            //XamlRoot.Content.CapturePointer(e.Pointer);
+        }
+
+        private void _topThumb_DragDelta(object sender, DragDeltaEventArgs e)
+        {
+            
+            _layoutRoot.Height = _layoutRoot.ActualHeight;
+            _layoutRoot.Height -= e.VerticalChange;
+
+            _popup.SetValue(Popup.VerticalOffsetProperty, _popup.VerticalOffset += e.VerticalChange);
+        }
+
         private static void OnIconPropertyChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs args)
         {
             var sender = dependencyObject as NotificationFlyout;

src/TheXamlGuy.NotificationFlyout.Uwp.UI.Controls/NotificationFlyout/NotificationFlyout.xaml

@@ -50,23 +50,32 @@
                                         <EntranceThemeTransition x:Name="EntranceThemeTransition" />
                                     </TransitionCollection>
                                 </Border.Transitions>
-                                <ScrollViewer
-                                    x:Name="ScrollViewer"
-                                    AutomationProperties.AccessibilityView="Raw"
-                                    HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
-                                    HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}"
-                                    VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}"
-                                    VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}"
-                                    ZoomMode="{TemplateBinding ScrollViewer.ZoomMode}">
-                                    <ContentControl
-                                        x:Name="ContentPresenter"
-                                        Margin="{TemplateBinding Padding}"
-                                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
-                                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
-                                        Content="{TemplateBinding Content}"
-                                        ContentTemplate="{TemplateBinding ContentTemplate}"
-                                        ContentTransitions="{TemplateBinding ContentTransitions}" />
-                                </ScrollViewer>
+                                <Grid>
+                                
+
+                                    <ScrollViewer
+                                        x:Name="ScrollViewer"
+                                        AutomationProperties.AccessibilityView="Raw"
+                                        HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
+                                        HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}"
+                                        VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}"
+                                        VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}"
+                                        ZoomMode="{TemplateBinding ScrollViewer.ZoomMode}">
+                                        <ContentControl
+                                            x:Name="ContentPresenter"
+                                            Margin="{TemplateBinding Padding}"
+                                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                                            Content="{TemplateBinding Content}"
+                                            ContentTemplate="{TemplateBinding ContentTemplate}"
+                                            ContentTransitions="{TemplateBinding ContentTransitions}" />
+                                    </ScrollViewer>
+                                    <Rectangle
+                                        x:Name="TopThumb"
+                                        Height="10"
+                                        VerticalAlignment="Top"
+                                        Fill="Red" />
+                                </Grid>
                             </Border>
                         </Grid>
                         <VisualStateManager.VisualStateGroups>

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

@@ -22,6 +22,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\TheXamlGuy.NotificationFlyout.Common\TheXamlGuy.NotificationFlyout.Common.csproj" />
+    <ProjectReference Include="..\TheXamlGuy.NotificationFlyout.Shared.UI\TheXamlGuy.NotificationFlyout.Shared.UI.csproj" />
     <ProjectReference Include="..\TheXamlGuy.NotificationFlyout.Uwp.UI.Controls\TheXamlGuy.NotificationFlyout.Uwp.UI.Controls.csproj" />
     <ProjectReference Include="..\TheXamlGuy.NotificationFlyout.Wpf.UI\TheXamlGuy.NotificationFlyout.Wpf.UI.csproj" />
   </ItemGroup>

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

@@ -2,6 +2,7 @@
 using TheXamlGuy.NotificationFlyout.Wpf.UI.Extensions;
 using System.Windows;
 using System.Windows.Media;
+using System;
 
 namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Controls
 {
@@ -9,11 +10,9 @@ namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Controls
     {
         internal const double WindowSize = 0;
 
-        public TransparentXamlHost()
-        {
-            Loaded += OnLoaded;
-            PrepareDefaultWindow();
-        }
+        public TransparentXamlHost() => PrepareDefaultWindow();
+
+        protected override void OnContentRendered(EventArgs args) => Visibility = Visibility.Hidden;
 
         protected override WindowsXamlHost OnPreparingXamlHost(WindowsXamlHost xamlHost)
         {
@@ -22,16 +21,9 @@ namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Controls
 
             return base.OnPreparingXamlHost(xamlHost);
         }
-
-        private void OnLoaded(object sender, RoutedEventArgs args)
-        {
-            this.Hidden();
-        }
-
         private void PrepareDefaultWindow()
         {
             ShowInTaskbar = false;
-            ShowActivated = false;
             WindowStyle = WindowStyle.None;
             ResizeMode = ResizeMode.NoResize;
             AllowsTransparency = true;

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

@@ -31,7 +31,11 @@ namespace TheXamlGuy.NotificationFlyout.Wpf.UI.Extensions
         public static void Hidden(this Window window)
         {
             var handle = window.GetHandle();
-            PInvoke.SetWindowLong((HWND)handle, GWL_EX_STYLE, (PInvoke.GetWindowLong((HWND)handle, GWL_EX_STYLE) | (int)WindowFlag.WS_EX_TOOLWINDOW) & ~(int)WindowFlag.WS_EX_APPWINDOW);
+
+            int exStyle = (int)PInvoke.GetWindowLong((HWND)handle, (int)GWL_EX_STYLE);
+
+            exStyle |= (int)WindowFlag.WS_EX_APPWINDOW;
+            PInvoke.SetWindowLong((HWND)handle, (int)GWL_EX_STYLE, exStyle);
         }
 
         public static void SetTopAll(this Window window)

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

@@ -20,7 +20,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\TheXamlGuy.NotificationFlyout.Common\TheXamlGuy.NotificationFlyout.Common.csproj" />
-    <ProjectReference Include="..\TheXamlGuy.NotificationFlyout.Shared.UI\TheXamlGuy.NotificationFlyout.Shared.UI.csproj" />
   </ItemGroup>
 
 </Project>