GearVRHelper.cs

using UnityEngine;

public class GearVRHelper : MonoBehaviour{
	//タップ・フリック検出用の
	public delegate void TrackPad(float x, float y);

	//戻るボタンの短押しと、長押し用
	public delegate void Trigger();

	//戻るボタンの長押し検出時間
	public const float holdDetectTime = 2;
	//タップ・フリック検出時間
	public const float tapDetectTime = 2;
	//タップ検出距離
	public const float tapDetectLength = 2;
	private const float tapDetectLengthSqrt = tapDetectLength*tapDetectLength;

	private Vector3 currentPos;
	private float holdTime;
	private bool isDrag;
	private Vector3 tapPos;
	private float tapTime;

	public static event Trigger OnBackPush , OnBackHold;
	public static event Trigger OnTap;
	public static event TrackPad OnFlick, OnDrag;

	public void Awake(){
		OnBackPush = delegate { };
		OnBackHold = delegate { };
		OnTap = delegate { };
		OnFlick = delegate { };
		OnDrag = delegate { };
	}

	private void Update(){
		//戻るボタンの短押しと、長押し
		if (Input.GetKey(KeyCode.Escape)){
			//戻るボタン
			var oldHoldTime = holdTime;
			holdTime += Time.deltaTime;
			if (oldHoldTime < holdDetectTime && holdTime > holdDetectTime){
				//長押ししたとみなす
				OnBackHold();
			}
		}
		else if (Input.GetKeyUp(KeyCode.Escape)){
			if (holdTime < holdDetectTime){
				OnBackPush();
			}
		}
		else{
			holdTime = 0;
		}

		//タッチパッドのタップ・ドラッグ・フリック
		var mousePos = Input.mousePosition;
		if (Input.GetMouseButtonDown(0)){
			isDrag = true;
			tapPos = mousePos;
			tapTime = Time.time;
			currentPos = mousePos;
		}
		else if (Input.GetMouseButton(0)){
			var d = currentPos - mousePos;
			if (isDrag && d.sqrMagnitude > tapDetectLengthSqrt) {
				if (d.x*d.x > d.y*d.y){//xの方が移動量が多い
					OnDrag(d.x, 0);
				}
				else{//y軸の方が移動量が多い
					OnDrag(0, d.y);
				}
			}
			currentPos = mousePos;
		}
		else{
			if (isDrag) {//PULL
				if (Time.time - tapTime < tapDetectTime){
					var d = tapPos - mousePos;
					if (d.sqrMagnitude < tapDetectLengthSqrt) {
						OnTap();
					}
					else{
						if (d.x*d.x > d.y*d.y){
							OnFlick(d.x, 0);
						}
						else{
							OnFlick(0, d.y);
						}
					}
				}
			}
			isDrag = false;
		}
	}
}