mitk::StdFunctionCommand::ActionFunction mitk::DisplayActionEventFunctions::ScrollSliceStepperAction() { auto actionFunction = [](const itk::EventObject& displayInteractorEvent) { if (DisplayScrollEvent().CheckEvent(&displayInteractorEvent)) { const DisplayScrollEvent* displayActionEvent = dynamic_cast<const DisplayScrollEvent*>(&displayInteractorEvent); const BaseRenderer::Pointer sendingRenderer = displayActionEvent->GetSender(); if (nullptr == sendingRenderer) { return; } mitk::SliceNavigationController* sliceNavigationController = sendingRenderer->GetSliceNavigationController(); if (nullptr == sliceNavigationController) { return; } if (sliceNavigationController->GetSliceLocked()) { return; } mitk::Stepper* sliceStepper = sliceNavigationController->GetSlice(); if (nullptr == sliceStepper) { return; } // if only a single slice image was loaded, scrolling will affect the time steps if (sliceStepper->GetSteps() <= 1) { sliceStepper = sliceNavigationController->GetTime(); } sliceStepper->MoveSlice(displayActionEvent->GetSliceDelta()); } }; return actionFunction; }