怎样在wpf中自定义鼠标指针

看看WPF Cursor类的两个构造函数吧:

public Cursor(Stream cursorStream) public Cursor( string cursorFile)

 

恩, 均要求用 ani 或 cur, 无语啊,我要使用一张普通图片呢? 或者甚至是在程序内存中动态生成一张图片而生成鼠标指针呢?
于是乎, 我们可以折腾出如下代码, 它可以从由一张图片来创建鼠标指针:

    /// <summary>     /// This class allow you create a Cursor form a Bitmap     /// </summary>     internal class BitmapCursor : SafeHandle     {
        public override bool IsInvalid         {             get             {                 return handle == (IntPtr)( - 1 );             }         }
        public static Cursor CreateBmpCursor(Bitmap cursorBitmap)         {
            var c = new BitmapCursor(cursorBitmap);
            return CursorInteropHelper.Create(c);         }
        protected BitmapCursor(Bitmap cursorBitmap)             : base ((IntPtr)( - 1 ), true )         {             handle = cursorBitmap.GetHicon();         }
        protected override bool ReleaseHandle()         {             bool result = DestroyIcon(handle);
            handle = (IntPtr)( - 1 );
            return result;         }
        [DllImport( " user32 " )]         private static extern bool DestroyIcon(IntPtr hIcon);     }

 

下面是一段示例代码:

        private static Cursor CreateMyCursor()         {             const int w = 25 ;             const int h = 25 ;             const int f = 4 ;
            var bmp = new Bitmap(w, h);
            Graphics g = Graphics.FromImage(bmp);             g.SmoothingMode = SmoothingMode.HighQuality;             g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            var pen = new Pen(Brushes.Black, 2.0F );
            g.DrawEllipse(pen, new Rectangle(f, f, w - 2 * f, w - 2 * f));
            g.Flush();             g.Dispose();             pen.Dispose();
            return BitmapCursor.CreateBmpCursor(bmp);         }

 

 

有人会说"啊!Bitmap? WinForm的! 就不可以从WPF的图像来生成么?" 那么免费赠送如下函数:

        public static Bitmap BitmapSourceToBitmap( this BitmapSource source)         {             using (var stream = new MemoryStream())             {                 var e = new BmpBitmapEncoder();                 e.Frames.Add(BitmapFrame.Create(source));                 e.Save(stream);
                var bmp = new Bitmap(stream);
                return bmp;             }         }

 

 

 

 

转载自：http://www.cnblogs.com/zhouyinhui/archive/2010/05/28/1746502.html