Method UndoLastInteraction

Modules/PythonSegmentation/src/mitknnInteractiveTool.cpp:387–442

}

void mitk::nnInteractiveTool::UndoLastInteraction()
{
  if (!this->IsSessionRunning() || !this->CanUndo())
    return;

  bool undone = false;

  try
  {
    undone = m_Impl->Undo();
  }
  catch (const Exception& e)
  {
    // A remote session can fail here (lease expired, server gone, or at
    // capacity). Tear it down and notify the GUI; otherwise propagate as the
    // other session operations do.
    if (this->HandleSessionError(Description(e)))
      return;

    throw;
  }

  if (!undone)
  {
    // The session reports nothing to undo; resync our record and stop.
    m_Impl->ClearLastInteraction();
    return;
  }

  // Remove the visualization of the undone interaction. The recorded prompt
  // type is the one used at interaction time, which is not necessarily the
  // currently active prompt type.
  if (m_Impl->LastInteractionType.has_value())
  {
    m_Impl->Interactors.at(m_Impl->LastInteractionType.value())
      ->RemoveLastInteraction(m_Impl->LastInteractionPromptType.value());
  }
  else if (m_Impl->LastInteractionWasMask)
  {
    m_Impl->InitialSeg = nullptr;
  }

  m_Impl->ClearLastInteraction();

  // session.undo() restored the target buffer in place; repaint the preview
  // from it via the regular update path (see the UndoRefreshPending branch in
  // DoUpdatePreview).
  m_Impl->UndoRefreshPending = true;
  this->UpdatePreview();

  // UpdatePreview() is synchronous, so the one-shot refresh has happened by
  // now. Clear the flag defensively: if UpdatePreview() returned before
  // reaching DoUpdatePreview (no input or preview image), a stale true would
  // make the next interaction take the refresh branch and be dropped silently.
  m_Impl->UndoRefreshPending = false;
}

bool mitk::nnInteractiveTool::CanUndo() const