Russian Qt Forum

class Indicator : public  QObject
{
    Q_OBJECT

public:
    Indicator();
    void start();
    void init();

private:
    QTimer dataTimer;

private slots:
    void onDraw();
};

Indicator::Indicator()
{
}

void Indicator::onDraw()
{
    std::cout << "input to onDraw" << std::flush;
    doSomething();
    std::cout << "out from onDraw" << std::flush;
}

void Indicator::start()
{
    std::cout << "input to setValue" << std::flush;
    dataTimer.start(100);
    std::cout << "out from setValue" << std::flush;
}

void Indicator::init(QCustomPlot *customPlot)
{
    connect(&dataTimer, SIGNAL(timeout()), this, SLOT(onDraw()));
}

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    indicator.init();
    connect(ui->pushButton, SIGNAL(clicked()), this, SLOT(onStart()));
}

void MainWindow::onStart()
{
    indicator.start();

}