On 05/07/2010 05:49 AM, Andrew Brunner wrote: in Linux, SendMessage seems to be implemented in a way that is not very compatible to what SendMessage does in Windows. (No wonder: SendMessage is a quite "interesting" Windows API function, that provides lots of side-effects: sometimes it blocks until the tasks is done. sometimes it interprets the parameters given and even transfers memory chunks from one applications to another.)
OTOH, PostMessage is defined to be non-blocking and works just within a single (multi-threaded) application. This seems to be provided by the LCLs "GTK2 Widget Type" in a very Windows compatible way. So you can use this to notify the main thread from a worker thread. In the main Form you define an appropriate class procedure by "procedure() .... message" and same will be called in the main thread if in some thread you do a postmessage() with the main form's handle and the appropriate message number. Here you can do things like "visible := true". -Michael -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
