using System;
using System.Collections.Generic;
using System.Text;
using UnityEngine;

namespace Thousandto.Core.Base
{
    /// <summary>
    /// 手指手势的操作 接口定义
    /// </summary>
    public interface IFingerGesturesEvent
    {
        //按下
        event FingerDownEventHandler OnFingerDown;
        //弹起
        event FingerUpEventHandler OnFingerUp;

        //两个手指的捏操作
        event PinchEventHandler OnPinchBegin;
        event PinchMoveEventHandler OnPinchMove;
        event PinchEventHandler OnPinchEnd;

        //两个手指的旋转操作
        event RotationBeginEventHandler OnRotationBegin;
        event RotationMoveEventHandler OnRotationMove;
        event RotationEndEventHandler OnRotationEnd;

        //单个手指的滑动操作
        event FingerMoveEventHandler OnFingerMoveBegin;
        event FingerMoveEventHandler OnFingerMove;
        event FingerMoveEventHandler OnFingerMoveEnd;
    }

    #region//定义委托

    /// <summary>
    /// Delegate for the OnFingerDown event
    /// </summary>
    /// <param name="fingerIndex">0-based index uniquely indentifying a specific finger</param>
    /// <param name="fingerPos">Current position of the finger on the screen</param>
    public delegate void FingerDownEventHandler(int fingerIndex, Vector2 fingerPos);

    /// <summary>
    /// Delegate for the OnFingerUp event
    /// </summary>
    /// <param name="fingerIndex">0-based index uniquely indentifying a specific finger</param>
    /// <param name="fingerPos">Current position of the finger on the screen</param>
    /// <param name="timeHeldDown">How long the finger has been held down before getting released, in seconds</param>
    public delegate void FingerUpEventHandler(int fingerIndex, Vector2 fingerPos, float timeHeldDown);

    /// <summary>
    /// Delegate for the OnFingerMoveBegin, OnFingerMove, OnFingerMoveEnd events
    /// </summary>
    /// <param name="fingerIndex">0-based index uniquely indentifying a specific finger</param>
    /// <param name="fingerPos">Current position of the finger on the screen</param>
    public delegate void FingerMoveEventHandler(int fingerIndex, Vector2 fingerPos);


    /// <summary>
    /// Delegate for the OnPinchBegin and OnPinchEnd events
    /// </summary>
    /// <param name="fingerPos1">First finger screen position</param>
    /// <param name="fingerPos2">Second finger screen position</param>
    public delegate void PinchEventHandler(Vector2 fingerPos1, Vector2 fingerPos2);

    /// <summary>
    /// Delegate for the OnPinchMove event
    /// </summary>
    /// <param name="fingerPos1">First finger screen position</param>
    /// <param name="fingerPos2">Second finger screen position</param>
    /// <param name="delta">How much the distance between the two fingers has changed since the last update. A negative value means the two fingers got closer, while a positive value means they moved further apart</param>
    public delegate void PinchMoveEventHandler(Vector2 fingerPos1, Vector2 fingerPos2, float delta);

    /// <summary>
    /// Delegate for the OnRotationBegin event
    /// </summary>
    /// <param name="fingerPos1">First finger screen position</param>
    /// <param name="fingerPos2">Second finger screen position</param>
    public delegate void RotationBeginEventHandler(Vector2 fingerPos1, Vector2 fingerPos2);

    /// <summary>
    /// Delegate for the OnRotationMove event
    /// </summary>
    /// <param name="fingerPos1">First finger screen position</param>
    /// <param name="fingerPos2">Second finger screen position</param>
    /// <param name="rotationAngleDelta">Angle difference, in degrees, since the last update.</param>
    public delegate void RotationMoveEventHandler(Vector2 fingerPos1, Vector2 fingerPos2, float rotationAngleDelta);

    /// <summary>
    /// Delegate for the OnRotationEnd event
    /// </summary>
    /// <param name="fingerPos1">First finger screen position</param>
    /// <param name="fingerPos2">Second finger screen position</param>
    /// <param name="totalRotationAngle">Total rotation performed during the gesture, in degrees</param>
    public delegate void RotationEndEventHandler(Vector2 fingerPos1, Vector2 fingerPos2, float totalRotationAngle);
    #endregion
}