I am trying to start a QTimer in a specific thread. However, the timer does not seem to execute and nothing is printing out. Is it something to do with the timer, the slot or the thread? main.cpp ...

I would like to run a timer inside a QThread. I have written some code in which I am getting some error during the run time. What am I doing wrong? (Parent is QThread(0x1498d10), parent's thread i...

The problem I encountered is that I decided to implement QThreads the way they are supposed to, based on numerous articles: https://www.qt.io/blog/2010/06/17/youre-doing-it-wrong http://mayaposch.w...

Problem Description I'm trying to make an application that collects data, processes it, displays it, and some actuation (open/close valves, etc). As a practice for future applications where I have...

I looked at this answer here which was very helpful, but it's not working as expected when trying to render a plot. The plot is working but the progress bar is not progressing, it will just jump t...

I've a class who create QRunnables and start them in a QThreadPool instance. My threads are working well, but in case user want to quit application, the application takes a long time to stop. Cert...

I'm having trouble with Qt signals. I don't understand how DirectConnection and QueuedConnection works? I'd be thankful if someone will explain when to use which of these (sample code would be ap...

I'm designing a GUI with PyQt where I need to display a matplotlib/pylab window when I click on a button that makes the plot of the data from a function I've created. It's like a runtime used in Ma...

I am working with a 50 fps camera (in Ubuntu environment and Qt framework) and every 20 ms I get a frame to process. I wrote a code to read images from camera and then store them in hard drive. w...

I made a class derived from QAbstractListModel and re-implemented all the necessary functions. I create an object of it, fill in some initial data into the model (all beginInsertRows etc done) and ...

I am trying to figure out why this code crashes if I try to run the threads for a second time once they are completed. The first time I click "Start 5 Threads" It runs just fine and finishes. But ...

Below is the code for my qthread implementation. I am trying to get gps data from satellite. QThread doesn't produce the finished() signal even when the programs exits gpsSearch() slot function. Th...

I would like to know how to properly stop a QThread. I havea infinite loop in a thread, and I would like to stop it when I do a specific action : I have tried : if (thread->isRunning()){...

I'm new to StackOverflow and wondering if I'm doing this right: I'm writing a simple Qt application to test multi-threading (something I am also completely new to). I made a MainWindow that contai...

I have 2 Threads in a Qt5Application: Thread A: contains a bunch of QObject derived class objects Thread B: worker in this Thread has all the pointers to the objects in A Thread A might be very ...

Suppose we wrote a non-const method in a QObject-deriving class: class MyClass : public QObject { int x; public: void method(int a) { x = a; // and possibly other things }; }; We want to mak...

I saw different topics on "pthread vs std::thread" and "QThread vs pthread" but none on "std::thread vs QThread". I have to program a software to drive a 3D Printer and need to use threads. There ...

I'm trying to do a fairly common thing in my PySide GUI application: I want to delegate some CPU-Intensive task to a background thread so that my GUI stays responsive and could even display a progr...

I have an QThread which listen server. I want to pause work of QThread immediately. Not waiting at all, but almost like terminating, it must be immediate.

I've got a threaded server. QTcpSocket needs to be created on the thread it needs to be ran on, FI: Qt - Handle QTcpSocket in a new thread by passing the socket descriptor. My problem is that, I ...

Created a QThread in main() i.e Main thread. Moved a worker class to the new thread. The thread executes the 'StartThread' method of worker class. Worker Thread: //header file class Worker : publ...

I wrote a thread that executes a worker object. Everything works fine. Also the resulting signals are emitted as they should. Of course I took care of the usual mistakes regarding thread/object aff...

Using PyQt4 4.8.6 the code below produces the error QObject::startTimer: QTimer can only be used with threads started with QThread when a is used as the variable for QApplication, but it does not...

I am looking for an answer if there is any difference between these two functions, aside from the constness of the first one: QThread * QObject::thread() const QThread * QThread::currentThread() ...

Is there any way we can pass a parameter to QThread when the thread is started (.start) ? I found an example of using pyqt thread in stackoverflow, but I was wondering how to pass a parameter, in ...