Method data

Modules/QtWidgets/src/QmitkRenderWindowDataStorageTreeModel.cpp:145–209

}

QVariant QmitkRenderWindowDataStorageTreeModel::data(const QModelIndex& index, int role) const
{
  auto baseRenderer = m_BaseRenderer.Lock();

  if (baseRenderer.IsNull())
  {
    return QVariant();
  }

  if (!index.isValid() || this != index.model())
  {
    return QVariant();
  }

  auto item = GetItemByIndex(index);
  if (nullptr == item)
  {
    return QVariant();
  }

  auto dataNode = item->GetDataNode();
  if (nullptr == dataNode)
  {
    return QVariant();
  }

  if (Qt::CheckStateRole == role)
  {
    bool visibility = false;
    dataNode->GetVisibility(visibility, baseRenderer);
    if (visibility)
    {
      return Qt::Checked;
    }
    else
    {
      return Qt::Unchecked;
    }
  }
  else if (Qt::DisplayRole == role)
  {
    return QVariant(QString::fromStdString(dataNode->GetName()));
  }
  else if (Qt::ToolTipRole == role)
  {
    return QVariant("Name of the data node.");
  }
  else if (Qt::DecorationRole == role)
  {
    QmitkNodeDescriptor* nodeDescriptor = QmitkNodeDescriptorManager::GetInstance()->GetDescriptor(dataNode);
    return nodeDescriptor->GetIcon(dataNode);
  }
  else if (Qt::UserRole == role || QmitkDataNodeRawPointerRole == role)
  {
    // user role always returns a reference to the data node,
    // which can be used to modify the data node in the data storage
    return QVariant::fromValue<mitk::DataNode*>(dataNode);
  }