using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Drawing;

namespace M423project
{
    /// <summary>
    /// 摄像机基类
    /// </summary>
    public abstract class CameraBase : DevBase
    {
        /// <summary>
        /// 图片抓拍事件
        /// </summary>
        /// <param name="image"></param>
        public delegate void CaptureImage(Object image);

        // 图像抓拍事件
        public CaptureImage ImageEvent { get; set; }

        // 扫描到的图片
        public Object ImageObj { get; set; }

        // 是否扫描中
        public bool IsScaning { get;set;}

        public CameraBase()
        {
            this.ImageEvent = null;
            this.IsScaning = false;
            this.ImageObj = null;
        }

        /// <summary>
        /// 一次性抓拍
        /// </summary>
        /// <returns></returns>
        public virtual bool Snapshot()
        {
            return false;
        }

        /// <summary>
        /// 开始扫描
        /// </summary>
        /// <returns></returns>
        public virtual bool StartScan()
        {
            return false;
        }
            
        /// <summary>
        /// 结束扫描
        /// </summary>
        public virtual void StopScan()
        {
            return;
        }

        /// <summary>
        /// 中断扫描
        /// </summary>
        public virtual void Abort()
        {
        }

        /// <summary>
        /// 把抓拍图片转成bitmap图片
        /// </summary>
        /// <returns></returns>
        public virtual Bitmap GetBitmap()
        {
            return null;
        }

        /// <summary>
        /// 设置相机参数
        /// </summary>
        protected virtual void InitParams()
        {
            return;
        }

        /// <summary>
        /// 释放图片数据
        /// </summary>
        protected virtual void FreeImage()
        { 
            
        }

        /// <summary>
        /// 通知图片获取事件
        /// </summary>
        protected void NotifyImageEvent()
        {
            if (null == this.ImageEvent)
            {
                return;
            }

            this.ImageEvent(this.ImageObj);
        }


    }

}