qtimer

I am having a hard time wording this question even though I don't think its that complicated. I want to do something simalar to QTimer::singleshot() but I want it to still only call the SLOT once even if QTimer::singleshot() is called multiple times before it fires. Timmmm This should work. class MyObject { // ... QTimer* mTimer; } MyObject::MyObject() { mTimer = new QTimer(this); mTimer->setSingleShot(true); connect(mTimer, SIGNAL(timeout()), SLOT(doStuff())); } MyObject::startOrResetTimer() { mTimer->start(1000); } If you only want to call a slot once off a timer you could look at something

I'm using pyside but (I think) is a generic Qt question. I know that QThread implementation calls ._exec() method so we should have an event loop on a started QThread. This way we can use QTimer on that thread (I've done this and it works perfectly). My problem is when QWaitCondition is also used, I'd like to have a "consumer" thread with a infinite loop waiting to be notify (from producers) on the QWaitCondition. The problem I have is that with this design I cannot use QTimer inside the consumer Thread. This is a snippet of the scenario I'm trying to explain: from PySide import QtGui from

When (and only when) I quit my application, these (and only these) repeated message appear on the command prompt: QObject::startTimer: QTimer can only be used with threads started with QThread QObject::startTimer: QTimer can only be used with threads started with QThread QObject::startTimer: QTimer can only be used with threads started with QThread This is quite strange for me, because I never use QTimer in my code (or QThread). In fact, no errors or crashes happen using the application, so this is not a real problem, actually. This happen in both Windows and Linux OSs. All my imports: from _

When I create a QTimer object in Qt 5, and start it using the start() member function, is a separate thread created that keeps track of the time and calls the timeout() function at regular intervals? For example, QTimer *timer = new QTimer; timer->start(10); connect(timer,SIGNAL(timeout()),someObject,SLOT(someFunction())); Here, how does the program know when timeout() occurs? I think it would have to run in a separate thread, as I don't see how a sequential program could keep track of the time and continue its execution simultaneously. However, I have been unable to find any information

I use QTimer to send periodically 'Ping' packet to the server (MQTT client). But it timer is not absolutely accurate. After some time of working it has some delay and server broken connection. I try to use different Qt::TimerType, but it does not help. I need the most accurate timer. Do you have any ideas? Thank you! EDIT (Frederik solution) I have done something this: tthread.h class TThread : public QThread { Q_OBJECT void run(); public: explicit TThread(QObject *parent = 0); signals: private slots: void timerOut(); }; tthread.cpp TThread::TThread(QObject *parent) : QThread(parent) { } void