If you do decide to use threads in your application,
it is strongly recommended that no more than one thread calls GUI functions. The thread sample shows that it is possible for many different threads to call GUI functions at once (all the threads created in the sample access GUI), but it is a very poor design choice for anything except an example. The design which uses
one GUI thread and several worker threads which communicate with the main one using events is much more robust and will undoubtedly save you countless problems (example: under Win32 a thread can only access GDI objects such as pens, brushes, &c created by itself and not by the other threads).
For communication between secondary threads and the main thread, you may use wxEvtHandler::AddPendingEvent or its short version wxPostEvent. These functions have a thread-safe implementation so that they can be used as they are for sending events from one thread to another. However
there is no built in method to send messages to the worker threads and you will need to use the available synchronization classes to implement the solution which suits your needs yourself. In particular, please note that it is not enough to derive your class from wxThread and wxEvtHandler to send messages to it: in fact, this does not work at all.
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