@return start and length of the selection, x is the offset of the
first selected character, relative to the first character of the
widget content. y is the length of the selection.
The selection values returned are visual (i.e., length will always always be
positive). To determine if a selection is right-to-left (RtoL) vs. left-to-right
(LtoR), compare the caretOffset to the start and end of the selection
(e.g., caretOffset is start of selection implies that the selection is RtoL).
@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 the selection.
@return start and length of the selection, x is the offset of the first selected character, relative to the first character of the widget content. y is the length of the selection. The selection values returned are visual (i.e., length will always always be positive). To determine if a selection is right-to-left (RtoL) vs. left-to-right (LtoR), compare the caretOffset to the start and end of the selection (e.g., caretOffset is start of selection implies that the selection is RtoL). @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>