Ejemplos de KProgressDialog::wasCancelled en C++ (Cpp)

Ejemplo n.º 1

Archivo: kstviewobjectimagedrag.cpp Proyecto: Kst-plot/kst-subversion-archive

QByteArray KstViewObjectImageDrag::encodedData(const char *mimeType) const {
  if (!_mimeTypes.contains(QString::fromLatin1(mimeType))) {
    return QByteArray();
  }

  QRect geom(0, 0, 0, 0);
  for (KstViewObjectList::ConstIterator i = _objects.begin(); i != _objects.end(); ++i) {
    geom = geom.unite((*i)->geometry());
  }

  QPixmap pm;
  pm.resize(geom.size());
  pm.fill();

  int prog = 0;
  bool cancelled = false;
  KstPainter p(KstPainter::P_EXPORT);
  p.begin(&pm);
  p.setClipping(true);
  KProgressDialog *dlg = new KProgressDialog(0, 0, QString::null, i18n("Generating and storing images of objects..."), true);
  dlg->setAllowCancel(true);
  dlg->progressBar()->setTotalSteps(_objects.count());
  dlg->progressBar()->setValue(prog);
  dlg->show();

  for (KstViewObjectList::Iterator i = _objects.begin(); i != _objects.end(); ++i) {
    p.setClipRect((*i)->geometry());
    p.setViewport((*i)->geometry());
    (*i)->paint(p, QRegion());
    if (dlg->wasCancelled()) {
      cancelled = true;
      break;
    }
    dlg->progressBar()->setValue(++prog);
    kapp->eventLoop()->processEvents(QEventLoop::ExcludeSocketNotifiers);
  }
  p.end();

  delete dlg;

  if (cancelled) {
    return QByteArray();
  }

  QByteArray rc;
#if QT_VERSION < 0x030200
  KTempFile tf;
  pm.save(tf.name(), KImageIO::typeForMime(mimeType).latin1());
  tf.close();
  QFile f(tf.name());
  if (f.open(IO_ReadOnly)) {
    rc = f.readAll();
    f.close();
  }
  QFile::remove(tf.name());
#else
  QDataStream ds(rc, IO_WriteOnly);
  pm.save(ds.device(), KImageIO::typeForMime(mimeType).latin1());
#endif

  return rc;
}