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;
}
