Recognizing the need to write reactor-based gui applications, the ace community has created several reactor extensions for use with x window system. each of these extends the ace_select_reactor to work with a specific toolkit. by using these reactors, your gui application can remain single threaded yet still respond to both gui events, such as button presses, any your own application events.

the ace_qtreactor extends both the ace_select_reactor and the trolltech qt library's qobjects class. rather then using select(), the qtwaitformultipleevents() function is used.