Qt call slot from another thread

Calling a slot from another thread

// Determine if this connection should be sent immediately or // put into the event queue if (( c-> connectionType == Qt:: AutoConnection && ! receiverInSameThread) || ( c-> connectionType == Qt:: QueuedConnection)) { queued_activate( … <Qt Threading Basics> Document Reading Note · GitHub Document Reading Note. GitHub Gist: instantly share code, notes, and snippets. MythTV: QObject is dangerous for your health

Multithreaded programming for multicore architectures with Qt We'd all like to split heavy work into a separate thread, but how can we do it with existing code?

Qt has had thread support for many years (Qt 2.2, released on 22 Sept 2000, introduced the QThread class.), and with the 4.0 release thread support is enabled by default on all supported platforms (although it can be turned off, see here for more details). Qt now offers several classes for dealing with threads; let's start with an overview. Multithreading with Qt - conf.qtcon.org

In this example, when we run our code, we get the following dialog: A new thread will be created in the constructor of the dialog. Hitting the "Start" button will ...

Qt Framework Events Signals Threads 2. Content Threading in QT QT Reentrancy vs QT ThreadSafe GUI and Non-GUI Threads Events andQWaitConditionprovides a way for threads to go to sleep until woken up by another thread.Qt supports four types of signal-slot connections: With direct connections, the slot gets called...

< QImage> images = loadImages(directory); ThumbThread *thread = new ThumbThread; connect(thread, Signal(finished( QList< QImage>)), this, SLOT(showThumbnails( QList< QImage>))) thread->start(images);

How Qt Signals and Slots Work - Part 3 - Queued and Inter How Qt Signals and Slots Work - Part 3 - Queued and Inter Thread Connections Once the event has been added to the queue, and if the receiver is living in another thread ... activate to prepare a Qt::QueuedConnection slot call. The code showed here has been slightly simplified and commented: static void queued_activate(QObject *sender, ... Segmentation fault while emitting signal from other thread

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This second post describes a way to have a separate thread capable of running various methods. Basically, you have a main thread (probably the GUI thread) and a second thread which you can call to execute multiple methods. When a method is called the thread will execute it and send a signal once it is… Signals & Slots | Qt 4.8