only open dialog if there are no popups already open

PolyChat/MainPage.xaml.cs

@@ -7,11 +7,11 @@ using System.Collections.ObjectModel;
 using System.Diagnostics;
 using System.Linq;
 using System.Text.Json;
-using System.Threading.Tasks;
+using Windows.Foundation;
 using Windows.UI.Core;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Media;
 
 // The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
 
@@ -90,7 +90,7 @@ namespace PolyChat
                 DateTime.Now
              );
             NewChatDialog dialog = new NewChatDialog();
-            var result = await dialog.ShowAsync();
+            var result = await SafelyOpenDialog(dialog);
             if (result == ContentDialogResult.Primary)
             {
                 string ip = IP.GetIPFromCode(dialog.getValue());
@@ -106,7 +106,7 @@ namespace PolyChat
         public async void OnOpenEditUsernameDialog(object sender = null, RoutedEventArgs e = null)
         {
             EditUsernameDialog dialog = new EditUsernameDialog(username);
-            var result = await dialog.ShowAsync();
+            var result = await SafelyOpenDialog(dialog);
             if (result == ContentDialogResult.Primary)
             {
                 username = dialog.getValue();
@@ -220,6 +220,27 @@ namespace PolyChat
             }
         }
 
+        public static IAsyncOperation<ContentDialogResult> SafelyOpenDialog(Dialog d)
+        {
+            if(VisualTreeHelper.GetOpenPopups(Window.Current).Count == 0)
+                return d.ShowAsync();
+            return null;
+        }
+
+        public static IAsyncOperation<ContentDialogResult> SafelyOpenDialog(NewChatDialog d)
+        {
+            if (VisualTreeHelper.GetOpenPopups(Window.Current).Count == 0)
+                return d.ShowAsync();
+            return null;
+        }
+
+        public static IAsyncOperation<ContentDialogResult> SafelyOpenDialog(EditUsernameDialog d)
+        {
+            if (VisualTreeHelper.GetOpenPopups(Window.Current).Count == 0)
+                return d.ShowAsync();
+            return null;
+        }
+
         // UPDATE FUNCTIONS FOR UI PLACEHOLDERS
 
         private void updateNoChatsPlaceholder()

PolyChat/PolyChat.csproj

@@ -204,9 +204,6 @@
       <Version>5.0.2</Version>
     </PackageReference>
   </ItemGroup>
-  <ItemGroup>
-    <None Include="PolyChat_TemporaryKey.pfx" />
-  </ItemGroup>
   <PropertyGroup Condition=" '$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '14.0' ">
     <VisualStudioVersion>14.0</VisualStudioVersion>
   </PropertyGroup>

PolyChat/Views/Dialog.xaml.cs

@@ -3,6 +3,7 @@ using PolyChat.Util;
 using System;
 using System.Collections.ObjectModel;
 using System.Linq;
+using System.Threading;
 using Windows.Foundation;
 using Windows.UI.Core;
 using Windows.UI.Popups;
@@ -34,7 +35,7 @@ namespace PolyChat.Views
             Primary = primary.Action;
             Secondary = secondary.Action;
             // show
-            ShowDialogAsync();
+            MainPage.SafelyOpenDialog(this);
         }
 
         private void setType(string type, string message)