#include <QPainter>

#include <QPen>

#include "pixlabel.h"

PixLabel::PixLabel()

        : QLabel(0)

{

}

void PixLabel::paintEvent(QPaintEvent * event)

{

    QLabel::paintEvent(event);

    QPainter p(this);

    p.fillRect(QRect(0, 0, 1024, 512), QBrush(Qt::black));

    if (rects.size())

    {

        p.setPen(QPen(Qt::lightGray));

        QVector<QPoint> centers;

        for(QList<QRect>::const_iterator it = rects.begin(); it != rects.end(); ++it)

            centers.push_back((*it).center());

        p.drawPolyline(QPolygon(centers));

        p.setPen(QPen(Qt::white));

        p.drawRects(rects.toVector());

        p.setPen(QPen(Qt::yellow));

        p.drawRect(rects.last());

    }

}

void PixLabel::mousePressEvent(QMouseEvent * e)

{

    if (!rects.empty())

    {

        if (e->button() == Qt::LeftButton)

            rects[rects.size() - 1].moveTopLeft(QPoint(e->x(), e->y()));

        else

        if (e->button() == Qt::RightButton)

            rects[rects.size() - 1].setBottomRight(QPoint(e->x(), e->y()));

        repaint();

    }

}

void PixLabel::AddRect()

{

    rects.push_back(QRect(0, 0, 1, 1));

    repaint();

}