Qt signal slot multithread
You provide the code - it is good. But I can not understand what you want? In mainwindow.h file put slots in the public section: @ public slots: void mySlot1();. Qt Signal Slot Multithread; Qt invokemethod vs signal slotRe: Multi-threading behavior of signals and slots. QML and Qt Quick QML multithread client with c++ integration QML as @LeLev said from another thread I should use the signal/slot, and it works correctly now.
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Since the start button is the only widget that can cause this slot to be invoked, we simply disable it before starting the thread, avoiding problems with re-entrancy. Have you tried to do anything with a QTimer that is on the stack of a thread moved class? Half a megabyte, which is more than enough. I tried LeLev method, So first I made another class named backend, and registered it to my qml with:. Actually what I want to do is to upload a large file to the server. Thanks, moveToThread works before any thread is started.
Hi PouryaTorabi and welcome,. The idea here is to make a wraper class that lives in the main thread and forwards signals and function calls to your threaded tcp class. I tried LeLev method, So first I made another class named backend, and registered it to my qml with:. Then in one of backend's functions I create an instance of the TCPhandler class and moved it in a new thread:.
In my tcpHandler class I create an instance of the Qtcpsocket. The part which cause it is:. Since mydata is some large datas. So I tried to write the threads to see if the socket's thread has change or not, and saw that the thread of the created socket is the same as the main thread but the tcpHandler is different.
I tried to force the socket to move to tcpHandler's thread by using:. The qml engine must also be in the main thread, so what option do I have? Actually what I want to do is to upload a large file to the server. TcpThread and tcp must be members of your backend class. The part which cause it is: PouryaTorabi To avoid problems and conflicts, refrain from stack variables and constructer initialization in the class that is supposed to be moved to another thread. Sockets are special, you can't create them in some thread and then move them to another.
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He panicked. Но все оказалось не так страшно, как ей думалось.
I have worker class that has been moved to another thread. Second part of application is GUI interface with button. When I click button thread starts:. So qDebug works fine and prints messages from my thread. QueuedConnection my application hangs up. There is no possible to click something button or even exit app.
BlockingQueuedConnection everything works fine. Messages are emitted and received between threads and also GUI timer works fine.
You can try to perform a QThread:: So worker's thread emitted signal too frequently. Learn more about Teams. Main problem I have worker class that has been moved to another thread. When I click button thread starts: Now when printMessage signal is emited, GUI thread executes slot method: So my question is why connection Qt:: QueuedConnection causes that app freezes? That is strange, normally it should work. Maby signal was emitted too frequently.
In main GUI is only read from emitted signal. Does this solves your problem? If so, you may consider writing an answer yourself. If not, please clarify further.
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