Method ProcessEvent

Rendering/UI/vtkWebAssemblyRenderWindowInteractor.cxx:390–575

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//------------------------------------------------------------------------------
void vtkWebAssemblyRenderWindowInteractor::ProcessEvent(int type, const std::uint8_t* event)
{
  auto& internals = (*this->Internals);
  const double dpr = emscripten_get_device_pixel_ratio();

  switch (type)
  {
    case EMSCRIPTEN_EVENT_VTK_TIMER:
    {
      auto* timerId = reinterpret_cast<const int*>(event);
      auto iter = internals.VTKToPlatformTimerMap.find(*timerId);
      if (iter != internals.VTKToPlatformTimerMap.end())
      {
        this->InvokeEvent(vtkCommand::TimerEvent, (void*)timerId);
        int platformTimerId = (*iter).second;
        // Here we deal with one-shot versus repeating timers
        if (this->IsOneShotTimer(*timerId))
        {
          vtkDestroyTimer(platformTimerId, true);
          internals.Timers.erase(*timerId);
          internals.VTKToPlatformTimerMap.erase(iter);
        }
      }
      break;
    }
    case EMSCRIPTEN_EVENT_RESIZE:
    {
      auto* size = vtkGetParentElementBoundingRectSize(this->CanvasSelector);
      this->UpdateSize(size[0], size[1]);
      free(size);
      this->InvokeEvent(vtkCommand::ConfigureEvent);
      this->Render();
      // VTK_DEPRECATED_IN_9_5_0()
      // Remove this InvokeEvent when removing 9.5.0 deprecations. Interactor
      // resizing should be observed via ConfigureEvent (generated by the UI
      // in the vtkRenderWindowInteractor subclasses).
      this->InvokeEvent(vtkCommand::WindowResizeEvent);
      break;
    }
    case EMSCRIPTEN_EVENT_FOCUS:
    case EMSCRIPTEN_EVENT_FOCUSIN:
    case EMSCRIPTEN_EVENT_MOUSEENTER:
    {
      this->InvokeEvent(vtkCommand::EnterEvent);
      break;
    }
    case EMSCRIPTEN_EVENT_BLUR:
    case EMSCRIPTEN_EVENT_FOCUSOUT:
    case EMSCRIPTEN_EVENT_MOUSELEAVE:
    {
      // resets repeat counter when focus is lost while a key is being pressed in order to
      // prevent overflow.
      internals.RepeatCounter = 0;
      this->InvokeEvent(vtkCommand::LeaveEvent);
      break;
    }
    case EMSCRIPTEN_EVENT_KEYPRESS:
      // EMSCRIPTEN_EVENT_KEYDOWN tracks these