Typedef for QFlags<ProcessEventsFlag> which contains an OR combination of ProcessEventsFlag values.

Refer to QEventLoop::ProcessEventsFlag for the enum documentation.

This enum controls the types of events processed by the processEvents() method.

See also

processEvents()

Constructs an event loop object with the given parent.

Destroys the event loop object.

Enters the main event loop and waits until exit() is called. Returns the value that was passed to exit(). If flags are specified, only events of the types allowed by the flags will be processed.

It is necessary to call this function to start event handling. The main event loop receives events from the window system and dispatches these to the application widgets. Generally speaking, no user interaction can take place before calling exec(). As a special case, modal widgets like QMessageBox can be used before calling exec(), because modal widgets use their own local event loop.

To make your application perform idle processing (i.e. executing a special function whenever there are no pending events), use a QTimer with 0 timeout. More sophisticated idle processing schemes can be achieved using processEvents().

See also

QApplication::quit(), exit(), processEvents()

Instructs the event loop to exit with a return code. After this method has been called, the event loop returns from the call to exec(). The exec() method returns returnCode. By convention, a returnCode of 0 means success and any non-zero value indicates an error.

Unlike the C library function of the same name, this method returns to the caller, it is the event processing which stops.

See also

QCoreApplication::quit(), quit(), exec()

Returns true if the event loop is running, otherwise returns false. The event loop is considered running from the time when exec() is called until exit() is called.

See also

exec(), exit()

Process pending events that match flags for a maximum of maxTime milliseconds, or until there are no more events to process, whichever is shorter. This method is useful when there is a long operation and you want to show progress without allowing user input. For this to happen, pass the enum value QEventLoop::ExcludeUserInputEvents in the flags parameter.

• This method does not process events continuously, it returns after all available events are processed.
• Specifying the WaitForMoreEvents flag makes will be ignored.

Processes pending events that match flags until there are no more events to process. Returns true if pending events were handled, otherwise returns false.

This method is useful when there is a long operation and you want to show progress without allowing user input. For this to happen, pass the enum value QEventLoop::ExcludeUserInputEvents in the flags parameter.

This method is simply a wrapper for QAbstractEventDispatcher::processEvents(). Refer to the documentation for that method for more details.

Instructs the event loop to exit normally. Equivalent to calling exit(0).

See also

QCoreApplication::quit(), exit()

Wakes up the event loop.

See also

QAbstractEventDispatcher::wakeUp()