#pragma once

#include <QDialog>
#include <QPainter>
#include <QPen>

class TestView : public QDialog
{
    Q_OBJECT

public:
    TestView(QWidget* parent = nullptr) : QDialog(parent) {}
    ~TestView() {}

    void paintEvent(QPaintEvent* event)
    {
        QPainter painter(this);
        painter.setRenderHint(QPainter::Antialiasing, true);
        painter.setRenderHint(QPainter::SmoothPixmapTransform, true);

        qreal radius = 200 * 10000.0f;

        auto _paint = [&](double x, double yAdjust, const QString& color) {
            QPointF center{ x, radius + yAdjust };
            painter.setPen(QColor(color));
            painter.drawArc(QRectF{ center.x() - radius, center.y() - radius, radius * 2.0f, radius * 2.0f }, 85.0f * 16.0f, 10.0f * 16.0f);
            for (int ii = 0; ii < width(); ii += 10)
            {
                double x = ii;
                double r2 = radius * radius;
                double y = std::sqrt(r2 - std::pow(center.x() - x, 2));
                double y1 = center.y() + y;
                double y2 = center.y() - y;
                painter.drawEllipse(QPointF{ x, y1 }, 2.0f, 2.0f);
                painter.drawEllipse(QPointF{ x, y2 }, 2.0f, 2.0f);
            }
        };
        _paint(-40000, -350, "#FF0000");
        _paint(0, 200, "#00FF00");
        _paint(40000, 0, "#0000FF");
    }
};