Initial commit

imagescrollarea.cpp

@@ -0,0 +1,40 @@
+#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();
+}