Rename EditorViewport.HasLoadedAssets to HasContentLoaded and fix it for prefab auto-fit

Ref #4137

Source/Editor/Content/Proxy/CubeTextureProxy.cs

@@ -52,7 +52,7 @@ namespace FlaxEditor.Content
         /// <inheritdoc />
         public override bool CanDrawThumbnail(ThumbnailRequest request)
         {
-            return _preview.HasLoadedAssets && ThumbnailsModule.HasMinimumQuality((CubeTexture)request.Asset);
+            return _preview.HasContentLoaded && ThumbnailsModule.HasMinimumQuality((CubeTexture)request.Asset);
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/MaterialInstanceProxy.cs

@@ -39,7 +39,7 @@ namespace FlaxEditor.Content
         /// <inheritdoc />
         public override bool CanDrawThumbnail(ThumbnailRequest request)
         {
-            return _preview.HasLoadedAssets && ThumbnailsModule.HasMinimumQuality((MaterialInstance)request.Asset);
+            return _preview.HasContentLoaded && ThumbnailsModule.HasMinimumQuality((MaterialInstance)request.Asset);
         }
     }
 }

Source/Editor/Content/Proxy/MaterialProxy.cs

@@ -39,7 +39,7 @@ namespace FlaxEditor.Content
         /// <inheritdoc />
         public override bool CanDrawThumbnail(ThumbnailRequest request)
         {
-            return _preview.HasLoadedAssets && ThumbnailsModule.HasMinimumQuality((Material)request.Asset);
+            return _preview.HasContentLoaded && ThumbnailsModule.HasMinimumQuality((Material)request.Asset);
         }
     }
 }

Source/Editor/Content/Proxy/ModelProxy.cs

@@ -83,7 +83,7 @@ namespace FlaxEditor.Content
         /// <inheritdoc />
         public override bool CanDrawThumbnail(ThumbnailRequest request)
         {
-            return _preview.HasLoadedAssets && ThumbnailsModule.HasMinimumQuality((Model)request.Asset);
+            return _preview.HasContentLoaded && ThumbnailsModule.HasMinimumQuality((Model)request.Asset);
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/ParticleEmitterProxy.cs

@@ -133,7 +133,7 @@ namespace FlaxEditor.Content
                 return false;
 
             // Ensure assets are ready to be used
-            if (!_preview.HasLoadedAssets)
+            if (!_preview.HasContentLoaded)
                 return false;
             var asset = (ParticleEmitter)request.Asset;
             if (!asset.IsLoaded)

Source/Editor/Content/Proxy/ParticleSystemProxy.cs

@@ -104,7 +104,7 @@ namespace FlaxEditor.Content
                 return false;
 
             // Ensure assets are ready to be used
-            if (!_preview.HasLoadedAssets)
+            if (!_preview.HasContentLoaded)
                 return false;
             var asset = (ParticleSystem)request.Asset;
             if (!asset.IsLoaded)

Source/Editor/Content/Proxy/PrefabProxy.cs

@@ -118,7 +118,7 @@ namespace FlaxEditor.Content
         /// <inheritdoc />
         public override bool CanDrawThumbnail(ThumbnailRequest request)
         {
-            if (!_preview.HasLoadedAssets)
+            if (!_preview.HasContentLoaded)
                 return false;
 
             // Check if asset is streamed enough

Source/Editor/Content/Proxy/SkinnedModelProxy.cs

@@ -106,7 +106,7 @@ namespace FlaxEditor.Content
         /// <inheritdoc />
         public override bool CanDrawThumbnail(ThumbnailRequest request)
         {
-            return _preview.HasLoadedAssets && ThumbnailsModule.HasMinimumQuality((SkinnedModel)request.Asset);
+            return _preview.HasContentLoaded && ThumbnailsModule.HasMinimumQuality((SkinnedModel)request.Asset);
         }
 
         /// <inheritdoc />

Source/Editor/Viewport/EditorViewport.cs

@@ -423,7 +423,7 @@ namespace FlaxEditor.Viewport
         /// <summary>
         /// Gets a value indicating whether this viewport has loaded dependant assets.
         /// </summary>
-        public virtual bool HasLoadedAssets => true;
+        public virtual bool HasContentLoaded => true;
 
         /// <summary>
         /// The 'View' widget button context menu.

Source/Editor/Viewport/PrefabWindowViewport.cs

@@ -396,6 +396,22 @@ namespace FlaxEditor.Viewport
             ViewportCamera.ShowActors(TransformGizmo.SelectedParents, ref orient);
         }
 
+        private static bool ActorHasContentLoaded(Actor a)
+        {
+            if (!a.HasContentLoaded)
+                return false;
+            var children = a.ChildrenCount;
+            for (int i = 0; i < children; i++)
+            {
+                if (!ActorHasContentLoaded(a.GetChild(i)))
+                    return false;
+            }
+            return true;
+        }
+
+        /// <inheritdoc />
+        public override bool HasContentLoaded => base.HasContentLoaded && (Instance == null || ActorHasContentLoaded(Instance));
+
         /// <inheritdoc />
         public EditorViewport Viewport => this;
 

Source/Editor/Viewport/Previews/AssetPreview.cs

@@ -245,7 +245,7 @@ namespace FlaxEditor.Viewport.Previews
         }
 
         /// <inheritdoc />
-        public override bool HasLoadedAssets => base.HasLoadedAssets && Sky.HasContentLoaded && EnvProbe.HasContentLoaded && PostFxVolume.HasContentLoaded;
+        public override bool HasContentLoaded => base.HasContentLoaded && Sky.HasContentLoaded && EnvProbe.HasContentLoaded && PostFxVolume.HasContentLoaded;
 
         /// <inheritdoc />
         public override void OnDestroy()

Source/Editor/Viewport/Previews/CubeTexturePreview.cs

@@ -237,7 +237,7 @@ namespace FlaxEditor.Viewport.Previews
         }
 
         /// <inheritdoc />
-        public override bool HasLoadedAssets => base.HasLoadedAssets && _previewMaterial.IsLoaded && _previewMaterial.BaseMaterial.IsLoaded;
+        public override bool HasContentLoaded => base.HasContentLoaded && _previewMaterial.IsLoaded && _previewMaterial.BaseMaterial.IsLoaded;
 
         /// <inheritdoc />
         public override void OnDestroy()

Source/Editor/Viewport/Previews/MaterialPreview.cs

@@ -175,11 +175,11 @@ namespace FlaxEditor.Viewport.Previews
         }
 
         /// <inheritdoc />
-        public override bool HasLoadedAssets
+        public override bool HasContentLoaded
         {
             get
             {
-                if (!base.HasLoadedAssets)
+                if (!base.HasContentLoaded)
                     return false;
                 UpdateMaterial();
                 return true;

Source/Editor/Viewport/Previews/ParticleEmitterPreview.cs

@@ -78,7 +78,7 @@ namespace FlaxEditor.Viewport.Previews
         }
 
         /// <inheritdoc />
-        public override bool HasLoadedAssets => (_emitter == null || _emitter.IsLoaded) && base.HasLoadedAssets;
+        public override bool HasContentLoaded => (_emitter == null || _emitter.IsLoaded) && base.HasContentLoaded;
 
         /// <inheritdoc />
         public override void OnDestroy()

Source/Editor/Viewport/Previews/ParticleSystemPreview.cs

@@ -226,7 +226,7 @@ namespace FlaxEditor.Viewport.Previews
         }
 
         /// <inheritdoc />
-        public override bool HasLoadedAssets => _previewEffect.HasContentLoaded && base.HasLoadedAssets;
+        public override bool HasContentLoaded => _previewEffect.HasContentLoaded && base.HasContentLoaded;
 
         /// <inheritdoc />
         public override void Update(float deltaTime)

Source/Editor/Windows/Assets/PrefabWindow.cs

@@ -536,7 +536,7 @@ namespace FlaxEditor.Windows.Assets
             }
 
             // Auto fit
-            if (_focusCamera && _viewport.Task.FrameCount > 1)
+            if (_focusCamera && _viewport.Task.FrameCount > 1 && _viewport.HasContentLoaded)
             {
                 _focusCamera = false;
                 Editor.GetActorEditorSphere(_viewport.Instance, out BoundingSphere bounds);