C++ Reactive Programming

Sending events

Many applications that are using the Qt framework want to send their own events, just like the framework-provided events. Suitable custom events can be constructed by using event objects and sending them with QCoreApplication::sendEvent() and QCoreApplication::postEvent().

sendEvent() is synchronous in execution; therefore, it processes the event immediately. For many event classes, there is a function called isAccepted(), which tells us whether the event was accepted or rejected by the last handler that was called.

postEvent() is asynchronous in execution; hence, it posts the event in a queue for later dispatch. The next time Qt's main event loop runs, it dispatches all posted events, with some optimization. For example, if ...