It tells Qt not to define the moc keywords signals, slots, and emit, because these names will be used by a 3rd party library, e.g. Boost. Then to continue using Qt signals and slots with the no_keywords flag, simply replace all uses of the Qt moc keywords

Você deve instalar o software Qt e configurar o NetBeans para usá-lo antes de criar aplicações do Qt no IDE. Importante: é necessário usar o Qt 4.8 para seguir este tutorial. Se quiser usar Qt 5, consulte este artigo: Como Configurar o Qt 5 de 64 Bi

As already described, every interaction the user has with a Qt application causes an Event. There are multiple types of event, each representing a difference type of interaction — e.g. mouse or keyboard events. Events that occur are passed to the event-