c++ - Qt Signals and slot thread safety - Stack Overflow The only way when slot will be launched concurrently is if you specified Qt::DirectConnection AND emitting signal in thread different from slot's thread. If you omit connection type, it would be Qt::AutoConnection. In this case if you emit a signal from one thread, and catching it in another one (e.g. in main GUI thread) - Qt will put a slot's ... Threads and QObjects | Qt 4.8 Signals and Slots Across Threads. Qt supports these signal-slot connection types: Auto Connection (default) If the signal is emitted in the thread which the receiving object has affinity then the behavior is the same as the Direct Connection. Otherwise, the behavior is the same as the Queued Connection."
Qt na mobilních zařízeních
When you emit a signal, Qt acquires relevant source and destination object mutexes, and compares the receiving object's thread() to QThread::currentThread(). If they are identical, the slot/functor is called immediately: it happens in the body of the signal, so the slot is called before the signal returns. python - pyqt4 emiting signals in threads to slots in main ... I have some custom signals in my main thread that I would like to emit in my other threads but I'm not sure how to connect them. Could someone post an example? ... pyqt4 emiting signals in threads to slots in main thread. ... Browse other questions tagged python multithreading qt signals-slots or ask your own question. asked. 7 years, 2 months ... Threads and QObjects | Qt 4.8 It also makes it possible to connect signals from any threads to slots of a specific thread. This is explained in more detail in the Signals and Slots Across Threads section below. A QObject instance is said to live in the thread in which it is created. Events to that object are dispatched by that thread's event loop.
Communicating with the Main Thread | C++ GUI ... - InformIT
Some times you see a signal is emitted in sender thread but connected slot doesn't ... Lets explain it more, Each thread created by Qt (including main thread and ... Qt 4.4.3: Thread Support in Qt - Huihoo In GUI applications, the main thread is also called the GUI thread because it's the only ... QFutureWatcher allows monitoring a QFuture using signals-and-slots. Qt based UI in plugin c++ - V-REP Forum the main (UI) thread, where the user interface code and Qt widgets are ... You can use Qt's signal-slot mechanisms to easily send messages ... Thread Safety with PySide – Jérôme Belleman
"How to use QThread in the right way (Part 1)" — 1+1=10
#include "progress.h" #include "progressthread.h" #include
Multithreading - Qt send signal to different thread
Code Journeys: Qt example : generating a single QImage in Jun 02, 2008 · Qt example : generating a single QImage in a separate thread to the GUI main.C, window.C, window.h, thread.C, thread.h, imagewindow.C and imagewindow.h. main.C ... is called. Using Qt's signals and slots, when the image has been generated, it is sent to the GUI thread and then displayed on the screen. Threads and QObjects | Qt 4.8 Signals and Slots Across Threads. Qt supports these signal-slot connection types: Auto Connection (default) If the signal is emitted in the thread which the receiving object has affinity then the behavior is the same as the Direct Connection. Otherwise, the behavior is the same as the Queued Connection." Direct Connection The slot is invoked ... c++ - Signal/slot multithreading Qt - Stack Overflow
user interface - Qt signaling across threads, one is GUI ... The owner thread makes a difference only when a slot is connected to a signal with the connection type other than Qt::DirectConnection. Then Qt will ensure that the slot runs on the owner thread, but for that the owner thread must be running an event loop with QThread::exec(). Emitting a Qt::signal from worker thread makes the UI ...