AppExperiments

using Leap.Unity.Interaction;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace Leap.Unity.Apps.Galaxies {

  public class PanelStateController : MonoBehaviour {

    public InteractionBehaviour widget;
    public PanelTransitionController transitionController;

    [Header("Auto")]
    public State state = State.Open;

    private float _grabIdleDuration = 0F;
    private Vector3 _lastGrabPosition;
    private float _grabIdleThreshold = 0.01F;
    private float _outlineHintDelay = 0.5F;

    void Start() {
      widget.OnGraspBegin += onGraspBegin;
    }

    void Update() {
      if (widget.isGrasped && state == State.Open) {
        transitionToClosed();
      }

      if (widget.isGrasped) {
        Vector3 grabPosition = widget.rigidbody.position;

        _grabIdleDuration += Time.deltaTime;

        float displacement = (grabPosition - _lastGrabPosition).magnitude;
        if (displacement > _grabIdleThreshold) {
          _grabIdleDuration = 0F;
        }

        if (_grabIdleDuration > _outlineHintDelay && state == State.Closed) {
          transitionToOutline();
        }
        else if (_grabIdleDuration < _outlineHintDelay && state == State.Outline) {
          transitionToClosed();
        }

        _lastGrabPosition = grabPosition;
      }

      if (!widget.isGrasped) {
        transitionToOpen();
      }
    }

    private void onGraspBegin() {
      _grabIdleDuration = 0F;
      _lastGrabPosition = widget.rigidbody.position;
    }

    private void transitionToClosed() {
      if (transitionController.UpdateTransitionToClosed()) {
        state = State.Closed;
      }
    }

    private void transitionToOutline() {
      if (transitionController.UpdateTransitionToOutline()) {
        state = State.Outline;
      }
    }

    private void transitionToOpen() {
      if (transitionController.UpdateTransitionToOpen()) {
        state = State.Open;
      }
    }

    public enum State {
      Open,
      Outline,
      Closed
    }

  }

}