spine-runtimes/spine-unity/Assets/spine-unity/Editor/BoneFollowerInspector.cs

/******************************************************************************
 * Spine Runtimes Software License
 * Version 2.3
 * 
 * Copyright (c) 2013-2015, Esoteric Software
 * All rights reserved.
 * 
 * You are granted a perpetual, non-exclusive, non-sublicensable and
 * non-transferable license to use, install, execute and perform the Spine
 * Runtimes Software (the "Software") and derivative works solely for personal
 * or internal use. Without the written permission of Esoteric Software (see
 * Section 2 of the Spine Software License Agreement), you may not (a) modify,
 * translate, adapt or otherwise create derivative works, improvements of the
 * Software or develop new applications using the Software or (b) remove,
 * delete, alter or obscure any trademarks or any copyright, trademark, patent
 * or other intellectual property or proprietary rights notices on or in the
 * Software, including any copy thereof. Redistributions in binary or source
 * form must include this license and terms.
 * 
 * THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/

using UnityEditor;
using UnityEngine;

namespace Spine.Unity.Editor {	
	[CustomEditor(typeof(BoneFollower))]
	public class BoneFollowerInspector : UnityEditor.Editor {
		SerializedProperty boneName, skeletonRenderer, followZPosition, followBoneRotation;
		BoneFollower targetBoneFollower;
		bool needsReset;

		void OnEnable () {
			skeletonRenderer = serializedObject.FindProperty("skeletonRenderer");
			boneName = serializedObject.FindProperty("boneName");
			followBoneRotation = serializedObject.FindProperty("followBoneRotation");
			followZPosition = serializedObject.FindProperty("followZPosition");

			targetBoneFollower = (BoneFollower)target;
			if (targetBoneFollower.SkeletonRenderer != null)
				targetBoneFollower.SkeletonRenderer.Initialize(false);
		}

		override public void OnInspectorGUI () {
			if (needsReset) {
				targetBoneFollower.Initialize();
				targetBoneFollower.LateUpdate();
				needsReset = false;
				SceneView.RepaintAll();
			}
			serializedObject.Update();

			// Find Renderer
			if (skeletonRenderer.objectReferenceValue == null) {
				SkeletonRenderer parentRenderer = BoneFollowerInspector.GetInParent<SkeletonRenderer>(targetBoneFollower.transform);
				if (parentRenderer != null) {
					Debug.Log("Inspector automatically assigned BoneFollower.SkeletonRenderer");
					skeletonRenderer.objectReferenceValue = parentRenderer;
				}
			}

			EditorGUILayout.PropertyField(skeletonRenderer);

			if (targetBoneFollower.valid) {
				EditorGUI.BeginChangeCheck();
				EditorGUILayout.PropertyField(boneName);
				if (EditorGUI.EndChangeCheck()) {
					serializedObject.ApplyModifiedProperties();
					needsReset = true;
					serializedObject.Update();
				}
				EditorGUILayout.PropertyField(followBoneRotation);
				EditorGUILayout.PropertyField(followZPosition);
			} else {
				var boneFollowerSkeletonRenderer = targetBoneFollower.skeletonRenderer;
				if (boneFollowerSkeletonRenderer == null) {
					EditorGUILayout.HelpBox("SkeletonRenderer is unassigned. Please assign a SkeletonRenderer (SkeletonAnimation or SkeletonAnimator).", MessageType.Warning);
				} else {
					boneFollowerSkeletonRenderer.Initialize(false);

					if (boneFollowerSkeletonRenderer.skeletonDataAsset == null)
						EditorGUILayout.HelpBox("Assigned SkeletonRenderer does not have SkeletonData assigned to it.", MessageType.Warning);
					
					if (!boneFollowerSkeletonRenderer.valid)
						EditorGUILayout.HelpBox("Assigned SkeletonRenderer is invalid. Check target SkeletonRenderer, its SkeletonDataAsset or the console for other errors.", MessageType.Warning);
				}
			}

			var current = UnityEngine.Event.current;
			bool wasUndo = (current.type == EventType.ValidateCommand && current.commandName == "UndoRedoPerformed");
			if (serializedObject.ApplyModifiedProperties() || wasUndo)
				targetBoneFollower.Initialize();
		}

		public static T GetInParent<T> (Transform origin) where T : Component {
			#if UNITY_4_3
			Transform parent = origin.parent;
			while (parent.GetComponent<T>() == null) {
				parent = parent.parent;
				if(parent == null)
					return default(T);
			}
			return parent.GetComponent<T>();
			#else
			return origin.GetComponentInParent<T>();
			#endif
		}
	}

}