using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Linq;
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using System.Text;
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namespace Eventech.DynPicture.Model
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{
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/// <summary>
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/// 动画功能图片处理类
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/// 使用方法
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/// 用Image对象实例化，注册OnFrameChanged事件，在事件中处理图片当前帧改变需要做的事，注意调用Image需要lock，否则容易报错
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/// </summary>
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public class AnimateImage:IDisposable
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{
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/// <summary>
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/// 原始图片
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/// </summary>
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public Image Image
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{
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get { return _img; }
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}
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private Image _img = null;
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private FrameDimension _frameDimension;
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/// <summary>
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/// 能否动画
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/// </summary>
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public bool CanAnimate
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{
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get { return _canAnimate; }
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}
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private bool _canAnimate;
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/// <summary>
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/// 总帧数。
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/// </summary>
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public int FrameCount
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{
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get { return _frameCount; }
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}
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private int _frameCount = 1;
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/// <summary>
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/// 播放的当前帧。
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/// </summary>
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public int CurrentFrame
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{
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get { return _currentFrame; }
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}
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private int _currentFrame = 0;
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/// <summary>
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/// 动画当前帧发生改变时触发。
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/// </summary>
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public event EventHandler<EventArgs> OnFrameChanged;
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/// <summary>
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/// 实例化一个AnimateImage。
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/// </summary>
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/// <param name="img">动画图片。</param>
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public AnimateImage(Image img)
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{
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_img = img;
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lock (_img)
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{
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_canAnimate = ImageAnimator.CanAnimate(_img);
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if (_canAnimate)
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{
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Guid[] guid = _img.FrameDimensionsList;
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_frameDimension = new FrameDimension(guid[0]);
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_frameCount = _img.GetFrameCount(_frameDimension);
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}
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}
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}
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/// <summary>
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/// 播放这个动画。
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/// </summary>
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public void Play()
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{
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if (_canAnimate)
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{
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lock (_img)
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{
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ImageAnimator.Animate(_img, new EventHandler(FrameChanged));
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}
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}
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}
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/// <summary>
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/// 停止播放。
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/// </summary>
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public void Stop()
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{
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if (_canAnimate)
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{
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lock (_img)
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{
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ImageAnimator.StopAnimate(_img, new EventHandler(FrameChanged));
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}
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}
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}
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/// <summary>
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/// 重置动画，使之停止在第0帧位置上。
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/// </summary>
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public void Reset()
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{
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if (_canAnimate)
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{
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try
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{
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ImageAnimator.StopAnimate(_img, new EventHandler(FrameChanged));
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lock (_img)
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{
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_img.SelectActiveFrame(_frameDimension, 0);
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_currentFrame = 0;
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}
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}
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catch
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{
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return;
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}
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}
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}
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private void FrameChanged(object sender, EventArgs e)
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{
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_currentFrame = _currentFrame + 1 >= _frameCount ? 0 : _currentFrame + 1;
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try
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{
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lock (_img)
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{
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var ci = _img.GetFrameCount(_frameDimension);
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if (ci < _currentFrame)
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return;
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_img.SelectActiveFrame(_frameDimension, _currentFrame);
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}
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if (OnFrameChanged != null)
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{
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OnFrameChanged(_img, e);
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}
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}
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catch
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{
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return;
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}
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}
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/// <summary>
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/// 释放图片资源
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/// </summary>
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public void Dispose()
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{
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if (this.Image != null)
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this.Image.Dispose();
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}
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}
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}
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