目录

打开文件操作

QList pqLoadDataReaction::loadData()*>

readerFactory->GetSupportedFileTypes(server->session())

Internals->Prototypes

 bool CanCreatePrototype(vtkSMSession* session)

 void FillInformation(vtkSMSession* session)

pqPipelineSource* pqLoadDataReaction::LoadFile

loadFile第十行:addDataFilesToRecentResources函数

pqPipelineSource : public pqProxy

打开文件操作

打开文件操作actionFileOpen()流程图

图：打开文件操作流程图

打开文件操作流程图中比较核心的工作是pqLoadDataReaction::loadData(),下面是pqLoadDataReaction::loadData()流程图

图：pqLoadDataReaction_loadData流程图

QList<pqPipelineSource*> pqLoadDataReaction::loadData()

QList<pqPipelineSource*> pqLoadDataReaction::loadData()
{
  pqServer* server = pqActiveObjects::instance().activeServer();
  vtkSMReaderFactory* readerFactory = vtkSMProxyManager::GetProxyManager()->GetReaderFactory();
  QString filters = readerFactory->GetSupportedFileTypes(server->session());
  // insert "All Files(*)" as the second item after supported files.
  int insertIndex = filters.indexOf(";;");
  if (insertIndex >= 0)
  {
    filters.insert(insertIndex, ";;All Files (*)");
  }
  else
  {
    assert(filters.isEmpty());
    filters = "All Files (*)";
  }

  pqFileDialog fileDialog(
    server, pqCoreUtilities::mainWidget(), tr("Open File:"), QString(), filters);
  fileDialog.setObjectName("FileOpenDialog");
  fileDialog.setFileMode(pqFileDialog::ExistingFilesAndDirectories);
  QList<pqPipelineSource*> sources;
  if (fileDialog.exec() == QDialog::Accepted)
  {
    QList<QStringList> files = fileDialog.getAllSelectedFiles();
    pqPipelineSource* source = pqLoadDataReaction::loadData(files);
    if (source)
    {
      sources << source;
    }
  }
  return sources;
}

readerFactory->GetSupportedFileTypes(server->session())

const char* vtkSMReaderFactory::GetSupportedFileTypes(vtkSMSession* session)

const char* vtkSMReaderFactory::GetSupportedFileTypes(vtkSMSession* session)
{
  std::ostringstream all_types;
  all_types << "Supported Files (";

  auto case_insensitive_comp = [](const std::string& s1, const std::string& s2) {
    return vtksys::SystemTools::Strucmp(s1.c_str(), s2.c_str()) < 0;
  };
  std::set<std::string, decltype(case_insensitive_comp)> sorted_types(case_insensitive_comp);

  for (auto& proto : this->Internals->Prototypes)
  {
    if (proto.second.CanCreatePrototype(session))
    {
      proto.second.FillInformation(session);
      for (auto& hint : proto.second.FileEntryHints)
      {
        std::string ext_list;
        if (!hint.Extensions.empty())
        {
          ext_list = ::vtkJoin(hint.Extensions, "*.", " ");
        }

        if (!hint.FilenameRegExs.empty())
        {
          std::string ext_join = ::vtkJoin(hint.FilenamePatterns, "", " ");
          if (!ext_list.empty())
          {
            ext_list += " ";
            ext_list += ext_join;
          }
          else
          {
            ext_list = ext_join;
          }
        }
        if (!ext_list.empty())
        {
          std::ostringstream stream;
          stream << hint.Description << " (" << ext_list << ")";
          sorted_types.insert(stream.str());
          all_types << ext_list << " ";
        }
      }
    }
  }
  all_types << ")";

  for (const auto& types : sorted_types)
  {
    all_types << ";;" << types;
  }
  this->Internals->SupportedFileTypes = all_types.str();
  return this->Internals->SupportedFileTypes.c_str();
}

Internals->Prototypes

设置prototypes，vtkSMProxyManager();

 bool CanCreatePrototype(vtkSMSession* session)

Returns true is a prototype proxy can be created on the given connection.

 void FillInformation(vtkSMSession* session)

图 pqServerConfiguration

pqPipelineSource* pqLoadDataReaction::LoadFile

pqPipelineSource* pqLoadDataReaction::LoadFile(
  const QStringList& files, pqServer* server, const QPair<QString, QString>& readerInfo)
{
  pqObjectBuilder* builder = pqApplicationCore::instance()->getObjectBuilder();
  pqPipelineSource* reader =
    builder->createReader(readerInfo.second, readerInfo.first, files, server);

  if (reader)
  {
    pqStandardRecentlyUsedResourceLoaderImplementation::addDataFilesToRecentResources(
      server, files, reader->getProxy()->GetXMLGroup(), reader->getProxy()->GetXMLName());
  }
  return reader;
}

pqServerResource::pqServerResource()

显示资源

loadFile第十行:addDataFilesToRecentResources函数
 

bool pqStandardRecentlyUsedResourceLoaderImplementation::addDataFilesToRecentResources(
  pqServer* server, const QStringList& files, const QString& smgroup, const QString& smname)

pqStandardRecentlyUsedResourceLoaderImplementation::addDataFilesToRecentResources(
      server, files, reader->getProxy()->GetXMLGroup(), reader->getProxy()->GetXMLName());

 pqApplicationCore::settings()，加载qt设置

参数files表示文件名（包含路径的全名），下面是参数files的数据流程：

QStringList：字符串列表

图：addDataFilesToRecentResources参数files_数据流程图 

void pqServerResource::addData(const QString& key, const QString& value)
{
  this->Implementation->ExtraData[key] = value;
}

进一步分析ExtraData数据流程：