Returns <code>true</code> if the receiver has a clipping
region set into it, and <code>false</code> otherwise.
If this method returns false, the receiver will draw on all
available space in the destination. If it returns true,
it will draw only in the area that is covered by the region
that can be accessed with <code>getClipping(region)</code>.
@return <code>true</code> if the GC has a clipping region, and <code>false</code> otherwise
@exception SWTException <ul>
<li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
</ul>
Returns <code>true</code> if the receiver has a clipping region set into it, and <code>false</code> otherwise. If this method returns false, the receiver will draw on all available space in the destination. If it returns true, it will draw only in the area that is covered by the region that can be accessed with <code>getClipping(region)</code>.
@return <code>true</code> if the GC has a clipping region, and <code>false</code> otherwise
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>