Displays the Tracker rectangles for manipulation by the user. Returns when
the user has either finished manipulating the rectangles or has cancelled the
Tracker.
@return <code>true</code> if the user did not cancel the Tracker, <code>false</code> otherwise
@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>
Displays the Tracker rectangles for manipulation by the user. Returns when the user has either finished manipulating the rectangles or has cancelled the Tracker.
@return <code>true</code> if the user did not cancel the Tracker, <code>false</code> otherwise
@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>