Modifies the receiver so that it represents a transformation that is
equivalent to its previous transformation rotated by the specified angle.
The angle is specified in degrees and for the identity transform 0 degrees
is at the 3 o'clock position. A positive value indicates a clockwise rotation
while a negative value indicates a counter-clockwise rotation.
@param angle the angle to rotate the transformation by
@exception SWTException <ul>
<li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
</ul>
Modifies the receiver so that it represents a transformation that is equivalent to its previous transformation rotated by the specified angle. The angle is specified in degrees and for the identity transform 0 degrees is at the 3 o'clock position. A positive value indicates a clockwise rotation while a negative value indicates a counter-clockwise rotation.
@param angle the angle to rotate the transformation by
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>