From c25fe3a80cdf029b3a3b427b0f47b2cf79aa6d22 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Fri, 29 May 2020 17:01:05 -0300
Subject: [PATCH] working transparent popup

---
 src/Avalonia.Themes.Fluent/AutoCompleteBox.xaml | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Themes.Fluent/AutoCompleteBox.xaml b/src/Avalonia.Themes.Fluent/AutoCompleteBox.xaml
index c9e6d880c1..11f9b85894 100644
--- a/src/Avalonia.Themes.Fluent/AutoCompleteBox.xaml
+++ b/src/Avalonia.Themes.Fluent/AutoCompleteBox.xaml
@@ -47,14 +47,22 @@
                  MaxHeight="{TemplateBinding MaxDropDownHeight}"
                  StaysOpen="False"
                  PlacementTarget="{TemplateBinding}">
+            <Popup.Styles>
+              <Style Selector="PopupRoot">
+                <Setter Property="WindowManagerAddShadowHint" Value="False" />
+                <Setter Property="TransparencyLevelHint" Value="Transparent" />
+                <Setter Property="Background" Value="{x:Null}" />
+              </Style>
+            </Popup.Styles>
             <Border Name="PART_SuggestionsContainer"
                     Padding="{DynamicResource AutoCompleteListMargin}"
                     BorderThickness="{DynamicResource AutoCompleteListBorderThemeThickness}"
-                    BorderBrush="{DynamicResource AutoCompleteBoxSuggestionsListBorderBrush}"
+                    BorderBrush="{DynamicResource AutoSuggestBoxSuggestionsListBorderBrush}"
                     Background="{DynamicResource AutoCompleteBoxSuggestionsListBackground}"
                     CornerRadius="{DynamicResource OverlayCornerRadius}">
               <ListBox Name="PART_SelectingItemsControl"
                        BorderThickness="0"
+                       Background="Transparent"
                        Foreground="{DynamicResource AutoCompleteBoxSuggestionsListForeground}"
                        ItemTemplate="{TemplateBinding ItemTemplate}"
                        Margin="{DynamicResource AutoCompleteListPadding}" />