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Assets/Oculus/Interaction/Runtime/Scripts/Unity/ActiveStateUnityEventWrapper.cs

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * All rights reserved.
+ *
+ * Licensed under the Oculus SDK License Agreement (the "License");
+ * you may not use the Oculus SDK except in compliance with the License,
+ * which is provided at the time of installation or download, or which
+ * otherwise accompanies this software in either electronic or hard copy form.
+ *
+ * You may obtain a copy of the License at
+ *
+ * https://developer.oculus.com/licenses/oculussdk/
+ *
+ * Unless required by applicable law or agreed to in writing, the Oculus SDK
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using UnityEngine;
+using UnityEngine.Events;
+
+namespace Oculus.Interaction
+{
+    public class ActiveStateUnityEventWrapper : MonoBehaviour
+    {
+        [Tooltip("Events will fire based on the state of this IActiveState.")]
+        [SerializeField, Interface(typeof(IActiveState))]
+        private UnityEngine.Object _activeState;
+        private IActiveState ActiveState;
+
+        [Tooltip("This event will be fired when the provided IActiveState becomes active.")]
+        [SerializeField]
+        private UnityEvent _whenActivated;
+
+        [Tooltip("This event will be fired when the provided IActiveState becomes inactive.")]
+        [SerializeField]
+        private UnityEvent _whenDeactivated;
+
+        public UnityEvent WhenActivated => _whenActivated;
+        public UnityEvent WhenDeactivated => _whenDeactivated;
+
+        [SerializeField]
+        [Tooltip("If true, the corresponding event will be fired at the beginning of Update")]
+        private bool _emitOnFirstUpdate = true;
+
+        private bool _emittedOnFirstUpdate = false;
+
+        private bool _savedState;
+
+        protected virtual void Awake()
+        {
+            ActiveState = _activeState as IActiveState;
+        }
+
+        protected virtual void Start()
+        {
+            this.AssertField(ActiveState, nameof(ActiveState));
+            _savedState = false;
+        }
+
+        protected virtual void Update()
+        {
+            if (_emitOnFirstUpdate && !_emittedOnFirstUpdate)
+            {
+                InvokeEvent();
+                _emittedOnFirstUpdate = true;
+            }
+
+            if (_savedState != ActiveState.Active)
+            {
+                _savedState = ActiveState.Active;
+                InvokeEvent();
+            }
+        }
+
+        private void InvokeEvent()
+        {
+            if (_savedState)
+            {
+                _whenActivated.Invoke();
+            }
+            else
+            {
+                _whenDeactivated.Invoke();
+            }
+        }
+
+        #region Inject
+
+        public void InjectAllActiveStateUnityEventWrapper(IActiveState activeState)
+        {
+            InjectActiveState(activeState);
+        }
+
+        public void InjectActiveState(IActiveState activeState)
+        {
+            _activeState = activeState as UnityEngine.Object;
+            ActiveState = activeState;
+        }
+
+        public void InjectOptionalEmitOnFirstUpdate(bool emitOnFirstUpdate)
+        {
+            _emitOnFirstUpdate = emitOnFirstUpdate;
+        }
+
+        public void InjectOptionalWhenActivated(UnityEvent whenActivated)
+        {
+            _whenActivated = whenActivated;
+        }
+
+        public void InjectOptionalWhenDeactivated(UnityEvent whenDeactivated)
+        {
+            _whenDeactivated = whenDeactivated;
+        }
+
+        #endregion
+    }
+}