#include "pictureview.h"

#include <QGraphicsView>
#include <QGraphicsScene>
#include <QDebug>
#include <QUrl>
#include <QHttp>

PictureView::PictureView(QWidget* parent)
        : QWidget(parent)
{
    http.connect(&http, SIGNAL(requestFinished(int,bool)),this, SLOT(onLoad(int,bool)) );
}

void PictureView::paintEvent ( QPaintEvent* event)
{    
    Q_UNUSED(event);
    QPainter painter(this);
    painter.drawPixmap(0,0,image);
    painter.end();
}

void PictureView::loadFromUrl(QString source)
{
    QMap<QString, QPixmap>::iterator it = map.find(source);
    if (it != map.end() ) {
        image = it.value();
        this->repaint();
    } else {
        requestedUrl = source;

        QUrl url(requestedUrl);
        http.setHost(url.host() );
        http.get(url.path(), 0);
    }
}

void PictureView::onLoad(int id, bool ok)
{
    Q_UNUSED(id);
    Q_UNUSED(ok);
    qint64 byteCount = http.bytesAvailable();

    if (byteCount > 0) {

        QByteArray data = http.readAll();   

        QPixmap pixmap;
        pixmap.loadFromData( data );

        QPixmap scaledImage = pixmap.scaledToHeight(size().height(), Qt::SmoothTransformation );

        image = scaledImage;
        this->repaint();

        map.insert(requestedUrl, scaledImage);
    }
}