C++ Ptr::isValid方法代码示例

void
KCustomMenuEditor::load(KConfigBase *cfg)
{
   cfg->setGroup(QString::null);
   int count = cfg->readNumEntry("NrOfItems");
   QListViewItem *last = 0;
   for(int i = 0; i < count; i++)
   {
      QString entry = cfg->readPathEntry(QString("Item%1").arg(i+1));
      if (entry.isEmpty())
         continue;

      // Try KSycoca first.
      KService::Ptr menuItem = KService::serviceByDesktopPath( entry );
      if (!menuItem)
         menuItem = KService::serviceByDesktopName( entry );
      if (!menuItem)
         menuItem = new KService( entry );

      if (!menuItem->isValid())
         continue;

      QListViewItem *item = new Item(m_listView, menuItem);
      item->moveItem(last);
      last = item;
   }
}

void ApplicationsProtocol::stat(const KUrl& url)
{
    KIO::UDSEntry entry;

    QString servicePath( url.path( KUrl::AddTrailingSlash ) );
    servicePath.remove(0, 1); // remove starting '/'

    KServiceGroup::Ptr grp = KServiceGroup::group(servicePath);

    if (grp && grp->isValid()) {
        createDirEntry(entry, ((m_runMode==ApplicationsMode) ? i18n("Applications") : i18n("Programs")),
                       url.url(), "inode/directory",grp->icon() );
    } else {
        KService::Ptr service = KService::serviceByDesktopName( url.fileName() );
        if (service && service->isValid()) {
            createFileEntry(entry, service, url );
        } else {
            error(KIO::ERR_SLAVE_DEFINED,i18n("Unknown application folder"));
            return;
        }
    }

    statEntry(entry);
    finished();
}

void ApplicationsProtocol::get( const KUrl & url )
{
    KService::Ptr service = KService::serviceByDesktopName(url.fileName());
    if (service && service->isValid()) {
        KUrl redirUrl(KStandardDirs::locate("apps", service->entryPath()));
        redirection(redirUrl);
        finished();
    } else {
        error( KIO::ERR_IS_DIRECTORY, url.prettyUrl() );
    }
}

void RemoteMenu::startWizard()
{
    KURL url;
    KService::Ptr service = KService::serviceByDesktopName(WIZARD_SERVICE);

    if (service && service->isValid())
    {
        url.setPath(locate("apps", service->desktopEntryPath()));
        new KRun(url, 0, true); // will delete itself
    }
}

void RemotePlugin::loadActions(DOM::HTMLElement node)
{
  KService::Ptr service = KService::serviceByDesktopName("knetattach");
 
  if(service && service->isValid()){  
    DOM::DOMString innerHTML;
    MetabarWidget::addEntry(innerHTML, i18n("Add a Network Folder"), "desktop://" + locate("apps", service->desktopEntryPath()), "wizard");
    node.setInnerHTML(innerHTML);
    
    m_functions->show("actions");
  }
  
  else{
    m_functions->hide("actions");
  }
}

Note* NoteFactory::createNoteLinkOrLauncher(const KUrl &url, Basket *parent)
{
	// IMPORTANT: we create the service ONLY if the extension is ".desktop".
	//            Otherwise, KService take a long time to analyse all the file
	//            and output such things to stdout:
	//            "Invalid entry (missing '=') at /my/file.ogg:11984"
	//            "Invalid entry (missing ']') at /my/file.ogg:11984"...
	KService::Ptr service;
	if (url.fileName().endsWith(".desktop"))
		service = new KService(url.path());

	// If link point to a .desktop file then add a launcher, otherwise it's a link
	if (service && service->isValid())
		return createNoteLauncher(url, parent);
	else
		return createNoteLink(url, parent);
}

void
KCustomMenuEditor::slotNewItem()
{
   QListViewItem *item = m_listView->currentItem();

   KOpenWithDlg dlg(this);
   dlg.setSaveNewApplications(true);

   if (dlg.exec())
   {
      KService::Ptr s = dlg.service();
      if (s && s->isValid())
      {
         Item *newItem = new Item(m_listView, s);
         newItem->moveItem(item);
      }
      refreshButton();
   }
}

SettingsDialog::SettingsDialog(QWidget *parent, const char *name,KConfigSkeleton *config)
 : KConfigDialog(parent, name, config),
 cddb(0), cddbChanged(false)
{
    addPage(new General(0, "General"), i18n("General"), "package_settings",
          i18n("General Configuration"));
    addPage(new CdConfig(0, "CD"), i18n("CD"), "package_system",
          i18n("CD Configuration"));

    // Because WE don't segfault on our users...
    KService::Ptr libkcddb = KService::serviceByDesktopName("libkcddb");
    if (libkcddb && libkcddb->isValid())
    {
        cddb = KCModuleLoader::loadModule(QString("libkcddb"), KCModuleLoader::Inline);
        if (cddb)
        {
            cddb->load();
            addPage(cddb, i18n("CDDB"), "cdaudio_mount", i18n("CDDB Configuration"), false);
            connect(cddb, SIGNAL(changed(bool)), this, SLOT(slotCddbChanged(bool)));
        }
    }

void ThumbnailProtocol::get(const KURL &url)
{
    m_mimeType = metaData("mimeType");
    kdDebug(7115) << "Wanting MIME Type:" << m_mimeType << endl;
#ifdef THUMBNAIL_HACK
    // ### HACK
    bool direct=false;
    if (m_mimeType.isEmpty())
    {
        kdDebug(7115) << "PATH: " << url.path() << endl;
        TQFileInfo info(url.path());
        if (info.isDir())
        {
            // We cannot process a directory
            error(TDEIO::ERR_IS_DIRECTORY,url.path());
            return;
        }
        else if (!info.exists())
        {
            // The file does not exist
            error(TDEIO::ERR_DOES_NOT_EXIST,url.path());
            return;
        }
        else if (!info.isReadable())
        {
            // The file is not readable!
            error(TDEIO::ERR_COULD_NOT_READ,url.path());
            return;
        }
        m_mimeType = KMimeType::findByURL(url)->name();
        kdDebug(7115) << "Guessing MIME Type:" << m_mimeType << endl;
        direct=true; // thumbnail: was probably called from Konqueror
    }
#endif

    if (m_mimeType.isEmpty())
    {
        error(TDEIO::ERR_INTERNAL, i18n("No MIME Type specified."));
        return;
    }

    m_width = metaData("width").toInt();
    m_height = metaData("height").toInt();
    int iconSize = metaData("iconSize").toInt();

    if (m_width < 0 || m_height < 0)
    {
        error(TDEIO::ERR_INTERNAL, i18n("No or invalid size specified."));
        return;
    }
#ifdef THUMBNAIL_HACK
    else if (!m_width || !m_height)
    {
        kdDebug(7115) << "Guessing height, width, icon size!" << endl;
        m_width=128;
        m_height=128;
        iconSize=128;
    }
#endif

    if (!iconSize)
        iconSize = TDEGlobal::iconLoader()->currentSize(TDEIcon::Desktop);
    if (iconSize != m_iconSize)
        m_iconDict.clear();
    m_iconSize = iconSize;

    m_iconAlpha = metaData("iconAlpha").toInt();
    if (m_iconAlpha)
        m_iconAlpha = (m_iconAlpha << 24) | 0xffffff;

    TQImage img;

    TDEConfigGroup group( TDEGlobal::config(), "PreviewSettings" );

    
    // ### KFMI
    bool kfmiThumb = false;
    if (group.readBoolEntry( "UseFileThumbnails", true )) {
        KService::Ptr service =
            KServiceTypeProfile::preferredService( m_mimeType, "KFilePlugin");

        if ( service && service->isValid() && /*url.isLocalFile() && */
            service->property("SupportsThumbnail").toBool())
        {
            KFileMetaInfo info(url.path(), m_mimeType, KFileMetaInfo::Thumbnail);
            if (info.isValid())
            {
                KFileMetaInfoItem item = info.item(KFileMimeTypeInfo::Thumbnail);
                if (item.isValid() && item.value().type() == TQVariant::Image)
                {
                    img = item.value().toImage();
                    kdDebug(7115) << "using KFMI for the thumbnail\n";
                    kfmiThumb = true;
                }
            }
        }
    }
    ThumbCreator::Flags flags = ThumbCreator::None;

    if (!kfmiThumb)
//.........这里部分代码省略.........