#include <SliderWidget.h>

SliderWidget::SliderWidget(QWidget *parent) : QWidget(parent)
{
    slider = new QSlider(Qt::Horizontal);
    layout = new QHBoxLayout();
    fpsLabel = new QLabel();
    timer = new QTimer(this);

    slider->setMinimum(0);
    slider->setMaximum(1000);
    slider->setTickPosition(QSlider::TicksBelow);
    slider->setTickInterval(1);

    fpsLabel->setText("fps");

    layout->addWidget(slider);
    layout->addWidget(fpsLabel);

    setLayout(layout);

    connect(timer, &QTimer::timeout, this, &SliderWidget::stepSlider);
    timer->start(10);
    fpsTime.start();
}

void SliderWidget::stepSlider()
{
    if (slider->value() >= slider->maximum())
        slider->setValue(0);
    else
        slider->setValue(slider->value() + 1);

    fpsCounter++;
    if (fpsCounter > 100)
    {
        double fps = fpsCounter / double(fpsTime.elapsed()) * 1000;
        fpsTime.restart();
        fpsCounter = 0;
        fpsLabel->setText(QString("%1 fps").arg(fps));
    }
}