threading fixes

Hyperbar.Windows.Primary/PrimaryWidgetConfigurationChangedHandler.cs

@@ -0,0 +1,22 @@
+namespace Hyperbar.Windows.Primary;
+
+public class PrimaryWidgetConfigurationChangedHandler :
+    INotificationHandler<ConfigurationChanged<PrimaryWidgetConfiguration>>
+{
+    private readonly IMediator mediator;
+    private readonly IEnumerable<IWidgetComponentViewModel> items;
+
+    public PrimaryWidgetConfigurationChangedHandler(IMediator mediator,
+        IEnumerable<IWidgetComponentViewModel> items)
+    {
+        this.mediator = mediator;
+        this.items = items;
+    }
+
+    public async ValueTask Handle(ConfigurationChanged<PrimaryWidgetConfiguration> notification, 
+        CancellationToken cancellationToken)
+    {
+        await mediator.PublishAsync(new CollectionChanged<IEnumerable<IWidgetComponentViewModel>>(items), 
+            cancellationToken);
+    }
+}

Hyperbar.Windows.Primary/PrimaryWidgetProvider.cs

@@ -7,8 +7,8 @@ public class PrimaryWidgetProvider :
     IWidgetProvider
 {
     public void Create(HostBuilderContext comtext, IServiceCollection services) => 
-            services.AddConfiguration(comtext.Configuration.GetSection(nameof(PrimaryWidgetConfiguration)), 
-                PrimaryWidgetConfiguration.Defaults)
-            .AddHandler<WidgetComponentMappingHandler>()
+            services.AddConfiguration< PrimaryWidgetConfiguration>(comtext.Configuration.GetSection(nameof(PrimaryWidgetConfiguration)))
+            .AddHandler<WidgetComponentMapping>()
+            .AddHandler<PrimaryWidgetConfigurationChangedHandler>()
             .AddWidgetTemplate<PrimaryWidgetViewModel>();
 }

Hyperbar.Windows.Primary/PrimaryWidgetViewModel.cs

@@ -1,4 +1,5 @@
- namespace Hyperbar.Windows.Primary;
+
+namespace Hyperbar.Windows.Primary;
 
 public class PrimaryWidgetViewModel :
     ObservableCollectionViewModel<IWidgetComponentViewModel>,
@@ -7,7 +8,8 @@ public class PrimaryWidgetViewModel :
 {
     public PrimaryWidgetViewModel(ITemplateFactory templateFactory, 
         IServiceFactory serviceFactory,
-        IEnumerable<IWidgetComponentViewModel> items) : base(serviceFactory, items)
+        IMediator mediator, 
+        IEnumerable<IWidgetComponentViewModel> items) : base(serviceFactory, mediator, items)
     {
         TemplateFactory = templateFactory;
     }

Hyperbar.Windows.Primary/WidgetComponentMapping.cs

@@ -1,13 +1,12 @@
 
-
 namespace Hyperbar.Windows.Primary;
 
-public class WidgetComponentMappingHandler(PrimaryWidgetConfiguration configuration,
+public class WidgetComponentMapping(PrimaryWidgetConfiguration configuration,
     IServiceFactory service,
     IMediator mediator) :
     IMappingHandler<PrimaryWidgetConfiguration, IEnumerable<IWidgetComponentViewModel>>
 {
-    public IEnumerable<IWidgetComponentViewModel> Map()
+    public IEnumerable<IWidgetComponentViewModel> Handle()
     {
         foreach (IPrimaryCommandConfiguration item in configuration)
         {