#include "aspectratiopixmaplabel.h"

AspectRatioPixmapLabel::AspectRatioPixmapLabel(QWidget *parent) :
	QLabel(parent)
{
	this->setMinimumSize(1,1);
	setScaledContents(false);
}

void AspectRatioPixmapLabel::setPixmap ( const QPixmap & p)
{
	pix = p;
	QLabel::setPixmap(scaledPixmap());
}

int AspectRatioPixmapLabel::heightForWidth( int width ) const
{
	return pix.isNull() ? this->height() : ((qreal)pix.height()*width)/pix.width();
}

QSize AspectRatioPixmapLabel::sizeHint() const
{
	int w = this->width();
	return QSize( w, heightForWidth(w) );
}

QPixmap AspectRatioPixmapLabel::scaledPixmap() const
{
	return pix.scaled(this->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
}

void AspectRatioPixmapLabel::resizeEvent(QResizeEvent * e)
{
	Q_UNUSED(e);
	if(!pix.isNull())
		QLabel::setPixmap(scaledPixmap());
}