Returns a rectangle which describes the area of the
receiver which is capable of displaying data (that is,
not covered by the "trimmings").
@return the client area
@exception SWTException <ul>
<li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
</ul>
Returns a rectangle which describes the area of the receiver which is capable of displaying data (that is, not covered by the "trimmings").
@return the client area
@exception SWTException <ul> <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> </ul>
@see #computeTrim