Really basic component inspection

Nerfed.Editor/Systems/EditorHierarchyWindow.cs

@@ -96,6 +96,7 @@ namespace Nerfed.Editor.Systems
 
             if (ImGui.TreeNodeEx($"{entity.ID} | {GetTag(entity)}", flags))
             {
+                // TODO: fix selection, look at ImGui 1.91, https://github.com/ocornut/imgui/wiki/Multi-Select
                 // Selection.
                 if (ImGui.IsItemClicked() && !ImGui.IsItemToggledOpen())
                 {

Nerfed.Editor/Systems/EditorInspectorWindow.cs

@@ -0,0 +1,56 @@
+using ImGuiNET;
+using MoonTools.ECS;
+using Nerfed.Editor.Components;
+
+#if DEBUG
+namespace Nerfed.Editor.Systems
+{
+    // Window that draws entities.
+    internal class EditorInspectorWindow : MoonTools.ECS.DebugSystem
+    {
+        private readonly Filter selectedEntityFilter;
+
+        public EditorInspectorWindow(World world) : base(world)
+        {
+            selectedEntityFilter = FilterBuilder.Include<SelectedInHierachy>().Build();
+        }
+
+        public override void Update(TimeSpan delta)
+        {
+            ImGui.Begin("Inspector");
+
+            foreach (Entity entity in selectedEntityFilter.Entities)
+            {
+                DrawEntityComponents(entity);
+            }
+
+            ImGui.End();
+        }
+
+        private void DrawEntityComponents(Entity entity)
+        {
+            World.ComponentTypeEnumerator components = World.Debug_GetAllComponentTypes(entity);
+
+            foreach (Type type in components)
+            {
+                ImGui.Text(type.Name);
+            }
+
+            ImGui.Separator();
+
+            // TODO: explore something without reflection.
+            // Maybe generate some look up dictionary<type, Action<world, entity>> for 'custom editors'.
+            // Look into serializing of entities and components.
+            foreach (Type component in components)
+            {
+                System.Reflection.MethodInfo getMethodInfo = typeof(World).GetMethod("Get");
+                System.Reflection.MethodInfo getComponentMethod = getMethodInfo.MakeGenericMethod(component);
+                object result = getComponentMethod.Invoke(World, [entity]);
+
+                // process here
+                ImGui.Text(result.ToString());
+            }
+        }
+    }
+}
+#endif