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#include "PhotoView.h"
#include <QDebug>
#include <QWheelEvent>
PhotoView::PhotoView (QWidget *parent) : QGraphicsView (parent)
{
setCacheMode (CacheBackground);
setViewportUpdateMode (BoundingRectViewportUpdate);
setRenderHint (QPainter::HighQualityAntialiasing);
setTransformationAnchor (AnchorUnderMouse);
}
void PhotoView::zoomIn ()
{
scale (scaleFactor, scaleFactor);
isFit = false;
}
void PhotoView::zoomOut ()
{
scale (invScaleFactor, invScaleFactor);
isFit = false;
}
void PhotoView::zoomNormal ()
{
resetMatrix ();
isFit = false;
}
void PhotoView::zoomFit ()
{
fitInView (sceneRect (), Qt::KeepAspectRatio);
isFit = true;
}
bool PhotoView::eventFilter (QObject *, QEvent *event)
{
if (event->type () == QEvent::Wheel)
{
QWheelEvent *wheel_event = static_cast<QWheelEvent *> (event);
if (wheel_event->delta () > 0)
{
if (wheel_event->modifiers () == Qt::ControlModifier)
{
emit nextImage ();
}
else
{
scale (scaleFactor, scaleFactor);
return true;
}
}
else if (wheel_event->delta () < 0)
{
if (wheel_event->modifiers () == Qt::ControlModifier)
{
emit prevImage ();
}
else
{
scale (invScaleFactor, invScaleFactor);
return true;
}
}
}
return false;
}
void PhotoView::mouseDoubleClickEvent (QMouseEvent *event)
{
if (event->button () == Qt::LeftButton)
{
if (isFit)
zoomNormal ();
else
zoomFit ();
}
}
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