杂记

void SlideShow::openPlaylist()
 {
     QString path = QFileDialog::getOpenFileName(this);

     if (!path.isEmpty()) {
         playlist->clear();
         playlist->load(QUrl::fromLocalFile(path));
     }
 }

 void SlideShow::openDirectory()
 {
     QString path = QFileDialog::getExistingDirectory(this);

     if (!path.isEmpty()) {
         playlist->clear();

         QDir dir(path);

         foreach (const QString &fileName, dir.entryList(QDir::Files))
             playlist->addMedia(QUrl::fromLocalFile(dir.absoluteFilePath(fileName)));

         statusChanged(imageViewer->mediaStatus());

         toolBar->setEnabled(playlist->mediaCount() > 0);
     }
 }