Added rotating rotation cursors (think about that one for a sec!)

src/Artemis.UI/Utilities/CursorRotator.cs

@@ -0,0 +1,86 @@
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Windows.Input;
+
+namespace Artemis.UI.Utilities
+{
+    public static class CursorUtilities
+    {
+        public static Cursor GetRotatedCursor(Icon icon, float rotationAngle)
+        {
+            // Load as Bitmap, convert to BitmapSource
+            using (var iconStream = new MemoryStream())
+            using (var rotatedStream = new MemoryStream())
+            {
+                icon.Save(iconStream);
+
+                // Open the source image and create the bitmap for the rotated image
+                using (var sourceImage = icon.ToBitmap())
+                using (var rotateImage = new Bitmap(sourceImage.Width, sourceImage.Height))
+                {
+                    // Set the resolution for the rotation image
+                    rotateImage.SetResolution(sourceImage.HorizontalResolution, sourceImage.VerticalResolution);
+                    // Create a graphics object
+                    using (var gdi = Graphics.FromImage(rotateImage))
+                    {
+                        //Rotate the image
+                        gdi.TranslateTransform((float) sourceImage.Width / 2, (float) sourceImage.Height / 2);
+                        gdi.RotateTransform(rotationAngle);
+                        gdi.TranslateTransform(-(float) sourceImage.Width / 2, -(float) sourceImage.Height / 2);
+                        gdi.DrawImage(sourceImage, new Point(0, 0));
+                    }
+
+                    // Save to a file
+                    IconFromImage(rotateImage).Save(rotatedStream);
+                }
+
+                // Convert saved file into .cur format
+                rotatedStream.Seek(2, SeekOrigin.Begin);
+                rotatedStream.Write(iconStream.ToArray(), 2, 1);
+                rotatedStream.Seek(10, SeekOrigin.Begin);
+                rotatedStream.Write(iconStream.ToArray(), 10, 2);
+                rotatedStream.Seek(0, SeekOrigin.Begin);
+
+                // Construct Cursor
+                return new Cursor(rotatedStream);
+            }
+        }
+
+        public static Icon IconFromImage(Image img)
+        {
+            using (var ms = new MemoryStream())
+            using (var bw = new BinaryWriter(ms))
+            {
+                // Header
+                bw.Write((short) 0); // 0 : reserved
+                bw.Write((short) 1); // 2 : 1=ico, 2=cur
+                bw.Write((short) 1); // 4 : number of images
+                // Image directory
+                var w = img.Width;
+                if (w >= 256) w = 0;
+                bw.Write((byte) w); // 0 : width of image
+                var h = img.Height;
+                if (h >= 256) h = 0;
+                bw.Write((byte) h); // 1 : height of image
+                bw.Write((byte) 0); // 2 : number of colors in palette
+                bw.Write((byte) 0); // 3 : reserved
+                bw.Write((short) 0); // 4 : number of color planes
+                bw.Write((short) 0); // 6 : bits per pixel
+                var sizeHere = ms.Position;
+                bw.Write(0); // 8 : image size
+                var start = (int) ms.Position + 4;
+                bw.Write(start); // 12: offset of image data
+                // Image data
+                img.Save(ms, ImageFormat.Png);
+                var imageSize = (int) ms.Position - start;
+                ms.Seek(sizeHere, SeekOrigin.Begin);
+                bw.Write(imageSize);
+                ms.Seek(0, SeekOrigin.Begin);
+
+                // And load it
+                return new Icon(ms);
+            }
+        }
+    }
+}