#include "imagescrollarea.h"
#include <QMouseEvent>
#include <QScrollBar>
#include <QKeyEvent>

ImageScrollArea::ImageScrollArea(QWidget *parent) : QScrollArea(parent)
{
    m_label = new QLabel(this);
    setWidget(m_label);
}

void ImageScrollArea::setImage(const QPixmap &img)
{
    QPixmap pix = img.scaled(size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
    m_label->setPixmap(pix);
    m_label->resize(pix.size());
}

void ImageScrollArea::keyPressEvent(QKeyEvent *event)
{
    event->ignore();
}

void ImageScrollArea::keyReleaseEvent(QKeyEvent *event)
{
    event->ignore();
}

void ImageScrollArea::mouseMoveEvent(QMouseEvent *event)
{
    QPoint delta = m_lastPos - event->pos();
    horizontalScrollBar()->setValue(horizontalScrollBar()->value() + delta.x());
    verticalScrollBar()->setValue(verticalScrollBar()->value() + delta.y());
    m_lastPos = event->pos();
}

void ImageScrollArea::mousePressEvent(QMouseEvent *event)
{
    m_lastPos = event->pos();
}