UnityEditorWindow做一个TimeLine的滑动块

UnityEditorWindow做一个TimeLine的滑动块

最近在做一个基于TimeLine的动画编辑器，在制作TineLine滑动条时遇到问题，网上查了好久,试了好多GUI组件都不满意。
最后在一个开源unity TimeLine插件中找到合适的方法。 地址：https://github.com/sassembla/TimeFlowShiki .
大致上是将Window当做一个滑动块，可以监听到鼠标Event.Drag的事件，然后移动滑块位置。
直接上代码

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

public class TimeLineWindowTest : EditorWindow
{
    public static TimeLineWindowTest window;
    public int id = 1221;
    public GUISkin skin;
    [MenuItem("Window/TimeLineWindowTest")]
    static void OpenWindow()
    {
        window = GetWindow<TimeLineWindowTest>();
    }
    Rect timeLineRect;
    Vector2 mouseLastPos = Vector2.zero;
    Vector2 mousePos = Vector2.zero;
    Rect trackRect = new Rect(200, 0, 150, 30);
    private void OnGUI()
    {
        BeginWindows();
        GUI.BeginGroup(new Rect(200, 0, position.width, position.height));
        {
            timeLineRect = new Rect(200, 0, position.width, 30);
            GUI.Window(id, timeLineRect, CallBack, "TimeLine1", skin.window);
        }
        GUI.EndGroup();
        EndWindows();
    }

    private void CallBack(int id)
    {
        bool useEvent = false;
        mousePos = Event.current.mousePosition;
        Vector2 mouseDownPos;
        switch (Event.current.type)
        {
            case EventType.MouseDown:
                if (trackRect.Contains(mousePos))
                {
                    mouseDownPos = mousePos;
                    useEvent = true;
                }

                break;
            case EventType.MouseDrag:
                if (trackRect.Contains(mousePos))
                {
                    float xOffset = mousePos.x - mouseLastPos.x;
                    trackRect.x += xOffset;
                    Debug.Log("拖拽");
                    useEvent = true;
                }
                break;
        }
        DrawTracks(trackRect);

        GUI.DragWindow();
        if (useEvent)
        {
            Event.current.Use();
        }

    }
    private void Update()
    {

        mouseLastPos = mousePos;
    }

    private void DrawTracks(Rect timeLineRect)
    {
        GUI.Box(timeLineRect, "265645", skin.box);

    }
}

　　

注意一点Update（）,只要是继承自EditorWindow中都可以调用每帧执行。

核心就这些。很简单，是不是!

运行效果如下：