display diagnostics

src/SharpIDE.Godot/Features/Problems/ProblemsPanel.cs

@@ -30,25 +30,55 @@ public partial class ProblemsPanel : Control
             });
         BindToTree(_projects);
     }
-    
+
+    private class TreeItemContainer
+    {
+        public TreeItem? Value { get; set; }
+    }
     public void BindToTree(ObservableHashSet<SharpIdeProjectModel> list)
     {
         var view = list.CreateView(x =>
         {
             var treeItem = _tree.CreateItem(_rootItem);
             treeItem.SetText(0, x.Name);
+            var projectDiagnosticsView = x.Diagnostics.CreateView(y =>
+            {
+                return new TreeItemContainer();
+            });
+            var test = projectDiagnosticsView.ObserveChanged().SubscribeOnCurrentSynchronizationContext()
+                .SubscribeAwait(async (e, ct) =>
+                {
+                    if (e.Action is NotifyCollectionChangedAction.Add)
+                    {
+                        await this.InvokeAsync(() =>
+                        {
+                            var diagItem = _tree.CreateItem(treeItem);
+                            diagItem.SetText(0, e.NewItem.Value.GetMessage());
+                            e.NewItem.View.Value = diagItem;
+                        });
+                    }
+                    if (e.Action is NotifyCollectionChangedAction.Remove)
+                    {
+                        await this.InvokeAsync(() =>
+                        {
+                            e.OldItem.View.Value?.Free();
+                        });
+                    }
+                });
             Observable.EveryValueChanged(x, s => s.Diagnostics.Count)
                 .Subscribe(s => treeItem.Visible = s is not 0);
             return treeItem;
         });
         view.ViewChanged += OnViewChanged;
     }
+    
     private static void OnViewChanged(in SynchronizedViewChangedEventArgs<SharpIdeProjectModel, TreeItem> eventArgs)
     {
         GD.Print("View changed: " + eventArgs.Action);
         if (eventArgs.Action == NotifyCollectionChangedAction.Remove)
         {
-            eventArgs.OldItem.View.Free();
+            var treeItem = eventArgs.OldItem.View;
+            Callable.From(() => treeItem.Free()).CallDeferred();
         }
     }
 }