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POQt thread and loop issue
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copied!<p>this is the run method of a subclass of QThread:</p> <pre><code>void crono::Controller::run() { //initialise timer int *i = & this->model->seconds_elapsed; for (*i = 0; *i < this->model->seconds_total; (*i)++) { //calculate current seconds/minutes/hours elapsed starting from seconds_elapsed (*i) this->model->tick(); //should display in the form the time elapsed this->vista->showTime(); sleep(1000); } Beep(1000, 500); //beep when all is over } </code></pre> <p>the controller updates the model values.</p> <p>The QT form is opened on start, I guess in the main application thread.</p> <p>The issue is that despise on debug *i=0 and seconds_total = X > 0, the loop is executed only one time, after the first time the debug halt (it does not end), the forms pops up but nothing happens.</p> <p>The only thing I can guess of, is that the Controller Thread lose its priority and never gains the cpu again. </p> <p>How can avoid this?</p> <p><em><strong>EDIT</em></strong> I am trying using QTimer, with bad luck.</p> <p>i declared update as a public slot, and then implemented like this:</p> <pre><code>void crono::Controller::update() { this->modello->tick(); this->vista->showTime(); //eventually stop at some point (pointer to timer and timer->stop()? //... //Beep(1000, 500); } </code></pre> <p>And I inserted the QTimer in the controller (thread) object instead of the loop cycle:</p> <pre><code>void crono::Controller::run() { //inizializzo timer int *i = & this->modello->secondi_trascorsi; QTimer *timer = new QTimer(this); connect(timer, SIGNAL(timeout()),this, SLOT(update())); timer->start(1000); } </code></pre> <p>I do not know why, but the update() method is never called, instead of being called an infinite number of times. Why?</p>

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