49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
#include "imagescrollarea.h"
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#include <QMouseEvent>
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#include <QScrollBar>
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#include <QKeyEvent>
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ImageScrollArea::ImageScrollArea(QWidget *parent) : QScrollArea(parent)
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{
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m_label = new QLabel(this);
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setWidget(m_label);
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}
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void ImageScrollArea::setImage(const QPixmap &img)
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{
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m_pixmap = img;
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QPixmap pix = img.scaled(size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
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m_label->setPixmap(pix);
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m_label->resize(pix.size());
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}
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void ImageScrollArea::keyPressEvent(QKeyEvent *event)
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{
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event->ignore();
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}
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void ImageScrollArea::keyReleaseEvent(QKeyEvent *event)
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{
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event->ignore();
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}
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void ImageScrollArea::mouseMoveEvent(QMouseEvent *event)
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{
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QPoint delta = m_lastPos - event->pos();
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horizontalScrollBar()->setValue(horizontalScrollBar()->value() + delta.x());
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verticalScrollBar()->setValue(verticalScrollBar()->value() + delta.y());
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m_lastPos = event->pos();
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}
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void ImageScrollArea::mousePressEvent(QMouseEvent *event)
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{
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m_lastPos = event->pos();
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}
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void ImageScrollArea::resizeEvent(QResizeEvent *event)
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{
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m_label->setPixmap(m_pixmap.scaled(event->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
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m_label->resize(event->size());
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QScrollArea::resizeEvent(event);
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}
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