Returns the offset of the composition from the start of the document.
This is the start offset of the composition within the document and
in not changed by the input method editor itself during the in-line edit
session.
@return the offset of the composition
@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 offset of the composition from the start of the document. This is the start offset of the composition within the document and in not changed by the input method editor itself during the in-line edit session.
@return the offset of the composition
@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>