using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEditor;
namespace TweenAnimation
{

    public partial class TweenAnimationInspector : Editor
    {
        bool m_MouseDown;

        DragState m_DragState;

        enum DragState
        {
            Release, 
            Drag, 

        }

        void DragPlay(Rect rulerRect)
        {
            if (!m_Pause)
                return;

            Event e = Event.current;

            Vector2 mousePos = e.mousePosition;

            bool bIn = rulerRect.Contains(mousePos);

            switch (m_DragState)
            {
                case DragState.Release:
                    if (e.type == EventType.MouseDown && bIn)
                        m_DragState = DragState.Drag;
                    break;
                case DragState.Drag:
                    if (e.type == EventType.MouseUp)
                        m_DragState = DragState.Release;
                    break;
            }
            if (m_DragState == DragState.Drag && bIn)
            {
                float x = mousePos.x - rulerRect.x;
                float t = x / rulerRect.width * animation.duration;
                float t0 = animation.GetIdentifiedTime(playbackTime);
                float dt = 0;
                if (t0 >= 0)
                    dt = t - t0;
                else // pingpong
                    dt = -t0 - t;
                m_PlaybackTimer.SetPauseTimeOffset(dt);
            }
        }
    }
}