Heroes_of_Hiis/Assets/Oculus/Interaction/Runtime/Scripts/Unity/PointableCanvasUnityEventWrapper.cs

/************************************************************************************
Copyright : Copyright (c) Facebook Technologies, LLC and its affiliates. All rights reserved.

Your use of this SDK or tool is subject to the Oculus SDK License Agreement, available at
https://developer.oculus.com/licenses/oculussdk/

Unless required by applicable law or agreed to in writing, the Utilities 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.Assertions;
using UnityEngine.Events;

namespace Oculus.Interaction
{
    /// <summary>
    /// This component makes it possible to connect PointableCanvases in the
    /// inspector to Unity Events that are broadcast from PointableCanvasModule.
    /// Useful for hooking into uGUI navigation.
    /// </summary>
    public class PointableCanvasUnityEventWrapper : MonoBehaviour
    {
        [SerializeField, Interface(typeof(IPointableCanvas))]
        private MonoBehaviour _pointableCanvas;
        private IPointableCanvas PointableCanvas;

        [SerializeField, Tooltip("Selection and hover events will not be fired while dragging.")]
        private bool _suppressWhileDragging = true;

        [SerializeField, Tooltip("Raised when beginning hover of a uGUI selectable")]
        private UnityEvent _whenBeginHighlight;

        [SerializeField, Tooltip("Raised when ending hover of a uGUI selectable")]
        private UnityEvent _whenEndHighlight;

        [SerializeField, Tooltip("Raised when selecting a hovered uGUI selectable")]
        private UnityEvent _whenSelectedHovered;

        [SerializeField, Tooltip("Raised when selecting with no uGUI selectable hovered")]
        private UnityEvent _whenSelectedEmpty;

        [SerializeField, Tooltip("Raised when deselecting a hovered uGUI selectable")]
        private UnityEvent _whenUnselectedHovered;

        [SerializeField, Tooltip("Raised when deselecting with no uGUI selectable hovered")]
        private UnityEvent _whenUnselectedEmpty;

        protected bool _started = false;

        private bool ShouldFireEvent(PointableCanvasEventArgs args)
        {
            if (args.Canvas != PointableCanvas.Canvas)
            {
                return false;
            }
            if (_suppressWhileDragging && args.Dragging)
            {
                return false;
            }
            return true;
        }

        private void PointableCanvasModule_WhenSelectableHoverEnter(PointableCanvasEventArgs args)
        {
            if (ShouldFireEvent(args))
            {
                _whenBeginHighlight.Invoke();
            }
        }

        private void PointableCanvasModule_WhenSelectableHoverExit(PointableCanvasEventArgs args)
        {
            if (ShouldFireEvent(args))
            {
                _whenEndHighlight.Invoke();
            }
        }

        private void PointableCanvasModule_WhenSelectableSelected(PointableCanvasEventArgs args)
        {
            if (ShouldFireEvent(args))
            {
                if (args.Hovered == null)
                    _whenSelectedEmpty.Invoke();
                else
                    _whenSelectedHovered.Invoke();
            }
        }

        private void PointableCanvasModule_WhenSelectableUnselected(PointableCanvasEventArgs args)
        {
            if (ShouldFireEvent(args))
            {
                if (args.Hovered == null)
                    _whenUnselectedEmpty.Invoke();
                else
                    _whenUnselectedHovered.Invoke();
            }
        }

        protected virtual void Awake()
        {
            PointableCanvas = _pointableCanvas as IPointableCanvas;
        }

        protected virtual void Start()
        {
            this.BeginStart(ref _started);
            Assert.IsNotNull(PointableCanvas);
            this.EndStart(ref _started);
        }

        protected virtual void OnEnable()
        {
            if (_started)
            {
                PointableCanvasModule.WhenSelectableHovered += PointableCanvasModule_WhenSelectableHoverEnter;
                PointableCanvasModule.WhenSelectableUnhovered += PointableCanvasModule_WhenSelectableHoverExit;
                PointableCanvasModule.WhenSelected += PointableCanvasModule_WhenSelectableSelected;
                PointableCanvasModule.WhenUnselected += PointableCanvasModule_WhenSelectableUnselected;
            }
        }

        protected virtual void OnDisable()
        {
            if (_started)
            {
                PointableCanvasModule.WhenSelectableHovered -= PointableCanvasModule_WhenSelectableHoverEnter;
                PointableCanvasModule.WhenSelectableUnhovered -= PointableCanvasModule_WhenSelectableHoverExit;
                PointableCanvasModule.WhenSelected -= PointableCanvasModule_WhenSelectableSelected;
                PointableCanvasModule.WhenUnselected -= PointableCanvasModule_WhenSelectableUnselected;
            }
        }
    }
}