added ability to create ImageAnimator3000 and SpriteAnimator3000 via editor-based context menu

Author: am1goo

Runtime/BaseSpriteAnimator3000.cs

@@ -341,6 +341,22 @@ public void EditorRefresh()
                 spritesheet.EditorRefresh();
             }
         }
+
+        protected static void EditorCreateAsset<A>(Func<A, T> func) where A : BaseSpriteAnimator3000<T>
+        {
+            var obj = new GameObject(typeof(A).Name);
+
+            var animator = obj.AddComponent<A>();
+            animator.m_renderer = func(animator);
+            animator.m_copyRenderers = new List<T>();
+
+            var activeObject = UnityEditor.Selection.activeGameObject;
+            var activeParent = activeObject != null ? activeObject.transform : null;
+            obj.transform.SetParent(activeParent);
+            obj.transform.localPosition = Vector3.zero;
+
+            UnityEditor.Selection.activeGameObject = obj;
+        }
 #endif
     }
 }

Runtime/ImageAnimator3000.cs

@@ -28,5 +28,25 @@ protected override void SetRendererFlip(Image renderer, bool flipX, bool flipY)
         {
             //do nothing
         }
+
+#if UNITY_EDITOR
+        [UnityEditor.MenuItem("Assets/Create/UI/Spritesheet 3000/Image Animator", validate = false)]
+        [UnityEditor.MenuItem("GameObject/UI/Spritesheet 3000/Image Animator", validate = false)]
+        private static void EditorCreateAsset()
+        {
+            EditorCreateAsset<ImageAnimator3000>((obj) =>
+            {
+                obj.m_spritesheets = new List<SpriteAnimationClip3000>();
+                obj.timeThread = ESpriteAnimatorThread.UnscaledTime;
+
+                var canvasRenderer = obj.gameObject.AddComponent<CanvasRenderer>();
+
+                var image = obj.gameObject.AddComponent<Image>();
+                image.sprite = UnityEditor.AssetDatabase.GetBuiltinExtraResource<Sprite>("UI/Skin/UISprite.psd");
+                image.type = UnityEngine.UI.Image.Type.Sliced;
+                return image;
+            });
+        }
+#endif
     }
 }

Runtime/SpriteAnimator3000.cs

@@ -28,5 +28,23 @@ protected override void SetRendererFlip(SpriteRenderer renderer, bool flipX, boo
             renderer.flipX = flipX;
             renderer.flipY = flipY;
         }
+
+#if UNITY_EDITOR
+        [UnityEditor.MenuItem("Assets/Create/UI/Spritesheet 3000/Sprite Animator", validate = false)]
+        [UnityEditor.MenuItem("GameObject/UI/Spritesheet 3000/Sprite Animator", validate = false)]
+        private static void EditorCreateAsset()
+        {
+            EditorCreateAsset<SpriteAnimator3000>((obj) =>
+            {
+                obj.m_spritesheets = new List<SpriteAnimationClip3000>();
+                obj.timeThread = ESpriteAnimatorThread.RelatedOnTimeScale;
+
+                var spriteRenderer = obj.gameObject.AddComponent<SpriteRenderer>();
+                spriteRenderer.sprite = UnityEditor.AssetDatabase.GetBuiltinExtraResource<Sprite>("UI/Skin/UISprite.psd");
+                spriteRenderer.drawMode = SpriteDrawMode.Simple;
+                return spriteRenderer;
+            });
+        }
+#endif
     }
 }