#include "ImagePreviewer.h"
#include <QPainter>

ImagePreviewer::ImagePreviewer(QWidget *parent) : QWidget(parent)
{

}

void ImagePreviewer::setImg(QImage img)
{
    m_img = img;
    repaint();
}

void ImagePreviewer::paintEvent(QPaintEvent* event)
{
    QPainter p(this);

    // p.fillRect(rect(), QBrush(QColor(199, 237, 202)));

    QRectF d = rect();
    QSizeF s = m_img.size();

    if(d.width() <= s.width() * m_maxScaleMultiple || d.height() <= s.height() * m_maxScaleMultiple) {
        d.setSize(s.scaled(d.size(), Qt::KeepAspectRatio));
    }
    else {
        d.setWidth(s.width() * m_maxScaleMultiple);
        d.setHeight(s.height() * m_maxScaleMultiple);
    }

    d.moveCenter(rect().center());

    p.drawImage(d, m_img);
}