#include "polygon.h"

Polygon::Polygon()
    : Line()
{
    m_polygon.append(QPoint(0,0));
    m_polygon.append(QPoint(0,0));
    m_polygon.append(QPoint(0,0));
}

bool Polygon::isHit(const QPoint &clickPoint)
{
    QVector3D a(p2() - p1());
    QVector3D r1(p1());

    QVector3D rq(clickPoint);

    float dist = rq.distanceToLine(r1, a.normalized());

    return  dist < 5;
}

void Polygon::draw(QPainter *painter)
{
    if (m_selected)
    {
        QPen penTemp(Qt::DotLine);
        penTemp.setColor(Qt::red);
        painter->setPen(penTemp);

        painter->drawEllipse(p1(), 5, 5);
        painter->drawEllipse(p2(), 5, 5);
        painter->drawEllipse(QPoint(p1().rx() + 20, p1().ry() - 20), 5, 5);
    }
    else
    {
        QPen penNormal(Qt::SolidLine);
        penNormal.setColor(Qt::black);
        painter->setPen(penNormal);
    }

    m_polygon.replace(0, p1());
    m_polygon.replace(1, p2());
    m_polygon.replace(2, QPoint(p1().rx() + 20, p1().ry() - 20));

    painter->drawPolygon(m_polygon);
}