public override void Run()
{
using (var bitmap = new Bitmap(Dimensions.Width, Dimensions.Height))
{
using (var img = Resources.GetBitmap(Resources.BitmapResources.compass2))
{
int da = 3;
for (int angle = 0; angle <= 360 && angle >= 0; angle += da)
{
bitmap.DrawRectangle(Colors.White, 0, 0, 0,
Dimensions.Width, Dimensions.Height,
0, 0, Colors.White, 0, 0, Colors.White, 0, 0,
Bitmap.OpacityOpaque);
int xdst = (Dimensions.Width - img.Width)/2,
ydst = (Dimensions.Height - img.Height)/2;
bitmap.RotateImage(angle, xdst, ydst, img, 0, 0, img.Width, img.Height, 0x00);
bitmap.Flush();
if (angle > 180)
da = -da;
}
}
}
}
public void RotateImage(int angle, int destinationX, int destinationY, Bitmap bitmap, int sourceX, int sourceY, int sourceWidth, int sourceHeight, ushort opacity)
{
bitmap.RotateImage(angle, translationX + destinationX, translationY + destinationY, bitmap, sourceX, sourceY, sourceWidth, sourceHeight, opacity);
}
/// <summary>
/// Handles multi-touch gesture events. Multitouch gestures are performed on the emulator by
/// holding down CTRL+[Z|P|R] and inking (to change the angle/zoom level).
/// </summary>
/// <param name="e">Touch gesture event data</param>
protected override void OnTouchGestureChanged(TouchGestureEventArgs e)
{
base.OnTouchGestureChanged(e);
Bitmap b;
switch (e.Gesture)
{
///
/// Zoom gesture magnifies the original bitmap by the gesture value contained in e.Arguments
///
case TouchGesture.Zoom:
if (_bmpGesture != null)
{
b = new Bitmap(_bitmap.Width, _bitmap.Height);
b.DrawRectangle(Color.Black, 1, 0, 0, b.Width - 2, b.Height - 2, 0, 0, Color.White, 0, 0, Color.White, b.Width, b.Height, Bitmap.OpacityOpaque);
b.StretchImage(-(e.Arguments), -(e.Arguments), _bmpGesture, _bmpGesture.Width + 2 * (e.Arguments), _bmpGesture.Height + 2 * (e.Arguments), Bitmap.OpacityOpaque);
_bitmap = b;
Invalidate();
}
break;
///
/// Pan (zoom out) gesture shrinks the original bitmap by the gesture value contained in e.Arguments
///
case TouchGesture.Pan:
if (_bmpGesture != null)
{
b = new Bitmap(_bitmap.Width, _bitmap.Height);
b.DrawRectangle(Color.Black, 1, 0, 0, b.Width - 2, b.Height - 2, 0, 0, Color.White, 0, 0, Color.White, b.Width, b.Height, Bitmap.OpacityOpaque);
b.StretchImage((e.Arguments), (e.Arguments), _bmpGesture, _bmpGesture.Width - 2 * (e.Arguments), _bmpGesture.Height - 2 * (e.Arguments), Bitmap.OpacityOpaque);
_bitmap = b;
Invalidate();
}
break;
///
/// Rotate gesture spins the original bitmap by the gesture value contained in e.Angle (0-360).
///
case TouchGesture.Rotate:
if (_bmpGesture != null)
{
b = new Bitmap(_bitmap.Width, _bitmap.Height);
b.DrawRectangle(Color.Black, 1, 0, 0, b.Width, b.Height, 0, 0, Color.White, 0, 0, Color.White, b.Width, b.Height, Bitmap.OpacityOpaque);
b.RotateImage((int)e.Angle, 1, 1, _bmpGesture, 1, 1, _bmpGesture.Width - 2, _bmpGesture.Height - 2, Bitmap.OpacityOpaque);
_bitmap = b;
Invalidate();
}
break;
}
}