Qt Call Slot Another Thread
Qt provides the signals and slots framework which allows you to do just that and is thread-safe, allowing safe communication directly from running threads to your GUI frontend. Signals allow you to.emit values, which are then picked up elsewhere in your code by slot functions which have been linked with.connect.
Qt Call Slot From Another Thread
- The event loops of Qt are a very valuable tool for inter-thread communication. Every thread may have its own event loop. A safe way of calling a slot in another thread is by placing that call in another thread's event loop. This ensures that the target object finishes the method that is currently running before another method is started.
- Nov 16, 2016 The QThread is the central class for of the Qt threading system. A QThread instance manages one thread of execution within the program. You can subclass QThread to override the run function, which will be executed in the QThread class. Here is how you can create and start a QThread. QThread thread; thread.start; The start function calling will automatically call the run function of.
I have been researching about QThreads, and have found out that the best way to use thread is to inherit a QObject and then move that to another thread. Signals are important, because with a queued connection, I don't have to worry about locking anything.
Because I am using Qt5, I would like to take full advantage of speed. I'm aware of using function pointers to connect, and I would rather that than using invokeMethod. Therefore, I created a signal in my QObject that calls the slot.
@class Output : public QObject
{
Q_OBJECT
public:
public slots:
Qt Invoke Slot
signals:
};@
And then add it to the queue by:
@Output *output = new Output();
output->moveToThread(tread);
emit ouput->postMessage();@
Qt Run Slot In Another Thread
Is my approach good? Will it be faster than invokeMethod since it uses function pointers instead of using strings to get the function? Is there a better way?