WPF很強大,但是當WPF的image控件遇到gif時就只讀了圖片的第一幀,很好很強大!
WPF不屑於gif的簡單動畫!
但是這對程序員來說不大爽啊!急得我眼淚都下來了!
幸好WPF裏有MediaElement這個東西,它是對MediaPlyer的一個封裝,果然很強大啊。不過另我不爽的是我這裏有N個gif圖片就要有N個MediaElement,要了親命了。
還是不好,如果你能想到用WebBrowseControl來實現,或者用Frame來實現,恭喜你,你太有才了!
我還是不想這麼去做,才分不夠啊!
重寫一下WPF的image,good idea!
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public class GIFImageControl : System.Windows.Controls.Image
{
delegate void OnFrameChangedDelegate();
private Bitmap m_Bitmap;
public string Path { get; set; }
BitmapSource bitmapSource;
public void AnimatedImageControl(string path)
{
Path = path;
m_Bitmap = (Bitmap)Image.FromFile(path);
Width = m_Bitmap.Width;
Height = m_Bitmap.Height;
ImageAnimator.Animate(m_Bitmap, OnFrameChanged);
bitmapSource = GetBitmapSource();
Source = bitmapSource;
}
private void OnFrameChanged(object sender, EventArgs e)
{
Dispatcher.BeginInvoke(DispatcherPriority.Normal,
new OnFrameChangedDelegate(OnFrameChangedInMainThread));
}
private void OnFrameChangedInMainThread()
{
ImageAnimator.UpdateFrames();
if (bitmapSource != null)
bitmapSource.Freeze();
bitmapSource = GetBitmapSource();
Source = bitmapSource;
InvalidateVisual();
}
//private static bool loaded;
private BitmapSource GetBitmapSource()
{
IntPtr inptr = m_Bitmap.GetHbitmap();
bitmapSource = Imaging.CreateBitmapSourceFromHBitmap(
inptr, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
DeleteObject(inptr);
return bitmapSource;
}
[DllImport("gdi32")]
static extern int DeleteObject(IntPtr o);
}
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ok,用window原有的東西去綁定到wpf上去。很好吧!是不是也比較有才呢?
本文來自CH似水年華的博客,原文地址: http://hi.baidu.com/mych/blog/item/1eb14f545f12a752564e00be.html