Method findOrCreatePreviewReader

Gui/SequenceFileDialog.cpp:2924–2970

}

NodePtr
SequenceFileDialog::findOrCreatePreviewReader(const std::string& filetype)
{
#ifndef NATRON_ENABLE_IO_META_NODES
    std::map<std::string, std::string> readersForFormat;
    appPTR->getCurrentSettings()->getFileFormatsForReadingAndReader(&readersForFormat);
    if ( !filetype.empty() ) {
        std::map<std::string, std::string>::iterator found = readersForFormat.find(filetype);
        if ( found == readersForFormat.end() ) {
            return NodePtr();
        }
        std::map<std::string, NodePtr>::iterator foundReader = _preview->readerNodes.find(found->second);
        if ( foundReader == _preview->readerNodes.end() ) {
            CreateNodeArgs args( QString::fromUtf8( found->second.c_str() ), eCreateNodeReasonInternal, NodeCollectionPtr() );
            args.fixedName = QString::fromUtf8(NATRON_FILE_DIALOG_PREVIEW_READER_NAME) +  QString::fromUtf8( found->first.c_str() );
            args.createGui = false;
            args.addToProject = false;
            NodePtr reader = _gui->getApp()->createNode(args);
            if (reader) {
                _preview->readerNodes.insert( std::make_pair(found->second, reader) );
            }

            return reader;
        } else {
            return foundReader->second;
        }
    }

    return NodePtr();
#else
    if (_preview->readerNode) {
        return _preview->readerNode;
    }
    Q_UNUSED(filetype);
    CreateNodeArgs args( PLUGINID_NATRON_READ, NodeCollectionPtr() );
    args.setProperty<bool>(kCreateNodeArgsPropOutOfProject, true);
    args.setProperty<bool>(kCreateNodeArgsPropNoNodeGUI, true);
    args.setProperty<bool>(kCreateNodeArgsPropSilent, true);
    args.setProperty<std::string>(kCreateNodeArgsPropNodeInitialName, NATRON_FILE_DIALOG_PREVIEW_READER_NAME);
    NodePtr reader = _gui->getApp()->createNode(args);
    if (reader) {
        _preview->readerNode = reader;
    }

    return _preview->readerNode;
#endif
}

void
SequenceFileDialog::refreshPreviewAfterSelectionChange()