Question

I’m inserting a hook in the MFC message loop so that the Qt events are treated, without running ->exec() on qApp (because it’s blocking):

LRESULT CALLBACK myHookFn(int ncode, WPARAM wparam, LPARAM lparam) {     if (qApp) qApp->sendPostedEvents();     return CallNextHookEx(0, ncode, wparam, lparam); } 

and

int argc = 0; new QApplication(argc, NULL); SetWindowsHookEx(WH_GETMESSAGE, myHookFn, 0, threadId); 

My question is:

What are the mechanisms equivalent to the MFC hook insertion that can be used under MacOSX so that sendPostedEvents could also be called?

Answer 1

This should happen automatically with Qt Mac 4.5 (both Carbon and Cocoa ports) – since Qt’s registered as a CFRunLoopSource in CFRunLoop and the callback will invoke sendPostedEvents. See also qeventdispatcher_mac.mm in src/gui/kernel of Qt 4.5