thumbnailworker.cpp

   1 #include "thumbnailworker.h"
   2
   3 ThumbnailWorker::ThumbnailWorker(QObject *parent) :
   4     QObject(parent)
   5 {
   6 }
   7
   8 void ThumbnailWorker::doWork()
   9 {
  10     QPixmap pixmap(m_path);
  11     if (pixmap.isNull()) {
  12         emit finished();
  13         return;
  14     }
  15
  16     if (pixmap.width() > m_size.width() || pixmap.height() > m_size.height()) {
  17         double scaleX = 1.0 * m_size.width() / pixmap.width();
  18         double scaleY = 1.0 * m_size.height() / pixmap.height();
  19         double scaleFactor = (scaleX > scaleY) ? scaleY : scaleX;
  20
  21         pixmap = pixmap.scaled(pixmap.size() * scaleFactor,
  22                                Qt::IgnoreAspectRatio,
  23                                Qt::SmoothTransformation);
  24     }
  25
  26     emit resultReady(m_path, pixmap);
  27     emit finished();
  28 }