Qt signal slot main thread

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c++ - Signal/slot multithreading Qt - Stack Overflow

Signals and slots is a language construct introduced in Qt for communication between objects which makes it easy to implement the observer pattern while avoiding boilerplate code. The concept is that GUI widgets can send signals containing event information which can be received by other widgets... Qt: Сигналы и слоты (выдержка из документации Qt 4.x) Сигналы и слоты используются для связи между объектами. Механизм сигналов и слотов - это основная особенность Qt и, вероятно, основная часть Qt, которая больше всего отличается по функциональности от других библиотек. Qt слот сигнала над потоком, это безопасный способ? slot_triggered_by_signal_from_thread_B(){ foreach(myObject* i, map->childItems){ i->do_some_thing(); } } Безопасно ли это?Это безопасно до тех пор, пока вы используете подключение автоматического или очереди типа conncetion между нитями с тех пор слот будет... Qt Framework Events Signals Threads

Signals and slots - Wikipedia

[SOLVED] Qt: Main thread signal + worker thread slot. | Qt ... [SOLVED] Qt: Main thread signal + worker thread slot. [SOLVED] Qt: Main thread signal + worker thread slot. This topic has been deleted. Only users with topic management privileges can see it. ronM71. last edited by . Say I wanted to have a worker thread that has slots for signals emmited from the main application thread. 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."

This special value will cause Qt to emit the timeout signal on behalf of the timer once its event loop becomes idle. If you connect to this signal with a slot, you will get a mechanism of calling functions when the application is not busy doing other things (similar to how screen savers work).

Qt for Beginners - Qt Wiki This section can be skipped for now if you only want to program with Qt. Just know that you need to put SIGNAL and SLOT around the signals and slots while calling connect. If you want to know how Qt works, it is better to read this. The Meta Object. Qt provides a meta-object system. Meta-object (literally "over the object") is a way to achieve ...

Both the signal and slot are defined in the same class and running under the main GUI thread, but I call the emit in another function which is being controlled by a boost thread type of thread. I am using Qt4 and Ubuntu 10.04 is my OS. This function is called from another thread which is emitting the signal.

Pak se ve vlákně na pozadí pustí ten reader->process(), který provolává QtRelationalReaderStringHadler ovšem jako normální metody -- a až uvnitř těchto metod to jde přes signál/slot (ale v rámci toho samého vlákna) a ze slotů se provolává … Grafické programy v Qt 4 - 5 (regexpy, vlákna a ukazatel #include "progress.h" #include "progressthread.h" #include #include #include #include #include #include #include Progress::Progress(QWidget *parent … Začíname KProgramovať - IV Vytvoření aplikace pomocí Qt Designeru aneb Trollové pomáhají. Getting the most of signal/slot connections : Viking Software