Stefan Röttger

worker *thread = new worker;

void dropEvent(QDropEvent *event)
{
   const QMimeData *mimeData = event->mimeData();

   if (mimeData->hasUrls())
   {
      event->acceptProposedAction();

      QList<QUrl> urlList = mimeData->urls();

      for (int i=0; i<urlList.size(); i++)
         {
         QUrl qurl = urlList.at(i);
         QString url = qurl.toString();

         if (url.startsWith("file://"))
            {
            url = url.remove("file://");

            std::cout << "start job for " << url.toStdString() << std::endl; // debug

            MyConverterJob *job = new MyConverterJob(url.toStdString());

            thread->run_job(job);
            }
         }
   }
}

class MyConverterJob: public Job
{
   public:

   MyConverterJob() : Job() {}
   MyConverterJob(const std::string &s) : Job(s) {}
   virtual ~MyConverterJob() {}

   virtual int execute(worker *worker)
   {
      // get file name to be converted
      QString filename(c_str());

      // try to load file as image
      QImage image;
      if (!image.load(filename)) return(1);

      // remove suffix from file name to yield output name
      QString output = filename;
      if (output.endsWith(".gif", Qt::CaseInsensitive)) output.truncate(output.size()-4);
      if (output.endsWith(".jpg", Qt::CaseInsensitive)) output.truncate(output.size()-4);
      if (output.endsWith(".tif", Qt::CaseInsensitive)) output.truncate(output.size()-4);
      output.append(".png");

      // save image as png
      if (!image.save(output, "PNG")) return(2);

      return(0);
   }
};