/// <summary>
/// Decode WM_Gesture Message using wParam and raise suitable Events
/// </summary>
/// <param name="hwnd"></param>
/// <param name="mgsID"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <param name="bHandled"></param>
/// <returns></returns>
private bool DecodeGesture(IntPtr hwnd, int mgsID, IntPtr wParam, IntPtr lParam, ref bool bHandled)
{
GESTUREINFO gi = new GESTUREINFO();
gi.cbSize = Marshal.SizeOf(new GESTUREINFO());
// Load the gesture information.
// We must p/invoke into user32 [winuser.h]
if (!GetGestureInfo(lParam, ref gi))
{
return(false);
}
try
{
switch (gi.dwID)
{
case GID_BEGIN:
GestureBegin(_handle, new GestureEventArgs(gi));
break;
case GID_END:
GestureEnd(_handle, new GestureEventArgs(gi));
break;
case GID_ZOOM:
GestureZoom(_handle, new GestureEventArgs(gi));
break;
case GID_PAN:
GesturePan(_handle, new GestureEventArgs(gi));
break;
case GID_PRESSANDTAP:
GesturePressAndTap(_handle, new GestureEventArgs(gi));
break;
case GID_ROTATE:
GestureRotate(_handle, new GestureEventArgs(gi));
break;
case GID_TWOFINGERTAP:
GestureTwoFingerTap(_handle, new GestureEventArgs(gi));
break;
}
}
catch (Exception ex)
{
Debug.Print(this.GetType() + ":DecodeGestureError: " + ex.Message);
}
return(true);
}
private static extern bool GetGestureInfo(IntPtr hGestureInfo, ref GESTUREINFO pGestureInfo);
public GestureEventArgs(GESTUREINFO gi)
{
_point = new Point(gi.ptsLocation.x, gi.ptsLocation.y);
_args = gi.ullArguments;
_gi = gi;
}