Traffic light

indexhtml821

Im trying to change colors on a graphic view to simulate traffic lights but im not sure why the colors doesnt change when the star button is clicked

void MainWindow::empezar_ciclo(){


    this->ui->Boton->hide();
    sleep_asm(3);
    semdirE->setBrush(QBrush(Qt::red));

}


void MainWindow::on_start_clicked(){

    int j=3;
    this->ui->start->setStyleSheet("QPushButton{background:transparent;}");
    MainWindow:ui->start->hide();
    int s = 3;
  //  empezar_ciclo();

when pressed the button should hide and then the brush change of color but the button waits til everything has been runned to hide thanks for your help

JonB

@indexhtml821 said in Traffic light:

sleep_asm(3);

Whatever this does, don't do it. It blocks the UI, no changes made will be seen till after it has returned. If you need a "delay" for some purpose use QTimer::singleShot().