mitk::StdFunctionCommand::ActionFunction mitk::DisplayActionEventFunctions::SetLevelWindowAction() { auto actionFunction = [](const itk::EventObject& displayInteractorEvent) { if (DisplaySetLevelWindowEvent().CheckEvent(&displayInteractorEvent)) { const DisplaySetLevelWindowEvent* displayActionEvent = dynamic_cast<const DisplaySetLevelWindowEvent*>(&displayInteractorEvent); const BaseRenderer::Pointer sendingRenderer = displayActionEvent->GetSender(); if (nullptr == sendingRenderer) { return; } // get the the topmost visible image of the sending renderer DataStorage::Pointer storage = sendingRenderer->GetDataStorage(); DataStorage::SetOfObjects::ConstPointer allImageNodes = storage->GetSubset(NodePredicateDataType::New("Image")); Point3D worldposition; const auto* positionEvent = dynamic_cast<const InteractionPositionEvent*>(displayActionEvent->GetInteractionEvent()); sendingRenderer->DisplayToWorld(positionEvent->GetPointerPositionOnScreen(), worldposition); auto globalCurrentTimePoint = sendingRenderer->GetTime(); DataNode::Pointer node = FindTopmostVisibleNode(allImageNodes, worldposition, globalCurrentTimePoint, sendingRenderer); if (node.IsNull()) { return; } LevelWindow levelWindow = LevelWindow(); node->GetLevelWindow(levelWindow); ScalarType level = levelWindow.GetLevel(); ScalarType window = levelWindow.GetWindow(); level += displayActionEvent->GetLevel(); window += displayActionEvent->GetWindow(); levelWindow.SetLevelWindow(level, window); auto* levelWindowProperty = dynamic_cast<LevelWindowProperty*>(node->GetProperty("levelwindow")); if (nullptr != levelWindowProperty) { levelWindowProperty->SetLevelWindow(levelWindow); sendingRenderer->GetRenderingManager()->RequestUpdateAll(); } } }; return actionFunction; }