Fixed disco mode

HueUWP/APIHandler.cs

@@ -13,7 +13,7 @@ namespace HueUWP
 {
     public class APIHandler
     {
-        
+        bool discomode = false;
 
         NetworkHandler nwh;
         public APIHandler(NetworkHandler nwh)
@@ -52,8 +52,9 @@ namespace HueUWP
 
         public async void DiscoMode(ObservableCollection<Light> lights)
         {
+            discomode = true;
             Random rnd = new Random();
-            for(int i = 0; i < 100; i++)
+            while(discomode)
             {
                 lights.ToList().ForEach(l =>
                 {
@@ -67,6 +68,11 @@ namespace HueUWP
             
         }
 
+        public async void DiscoMode(bool on)
+        {
+            discomode = on;
+        }
+
         public async Task<String> SetLightValues(Light l)
         {
             if(l.IsOn)

HueUWP/MainPage.xaml

@@ -61,7 +61,7 @@
 
     <Page.BottomAppBar>
         <CommandBar>
-            <AppBarButton Icon="Audio" Label="Disco" Click="AppBarButton_Click"/>
+            <AppBarToggleButton Icon="Audio" Label="Disco" Name="DiscoButton" Click="DiscoButton_Click"/>
             <AppBarButton Icon="Setting" Label="Settings" Click="SettingsButton_Click"/>
             <AppBarButton Icon="Refresh" Label="Refresh" Click="RefreshButton_Click"/>
             <AppBarSeparator/>

HueUWP/MainPage.xaml.cs

@@ -119,9 +119,12 @@ namespace HueUWP
             rootframe.Navigate(typeof(AboutView));
         }
 
-        private void AppBarButton_Click(object sender, RoutedEventArgs e)
+        private void DiscoButton_Click(object sender, RoutedEventArgs e)
         {
-            api.DiscoMode(_lightsViewModel);
+            if ((bool)DiscoButton.IsChecked)
+                api.DiscoMode(_lightsViewModel);
+            else
+                api.DiscoMode(false);
         }
     }
 }