Adds a verify listener. A Verify event is sent by the widget when the widget text
is about to change. The listener can set the event text and the doit field to
change the text that is set in the widget or to force the widget to ignore the
text change.
@param verifyListener the listener
@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>
@exception IllegalArgumentException <ul>
<li>ERROR_NULL_ARGUMENT when listener is null</li>
</ul>
Adds a verify listener. A Verify event is sent by the widget when the widget text is about to change. The listener can set the event text and the doit field to change the text that is set in the widget or to force the widget to ignore the text change.
@param verifyListener the listener @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> @exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT when listener is null</li> </ul>