Method HandleInteractionEvent

Web/Core/vtkWebApplication.cxx:251–344

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
bool vtkWebApplication::HandleInteractionEvent(vtkRenderWindow* view, vtkWebInteractionEvent* event)
{
  vtkRenderWindowInteractor* iren = nullptr;

  if (view)
  {
    iren = view->GetInteractor();
  }
  else
  {
    vtkErrorMacro("Interaction not supported for view : " << view);
    return false;
  }

  int ctrlKey = (event->GetModifiers() & vtkWebInteractionEvent::CTRL_KEY) != 0 ? 1 : 0;
  int shiftKey = (event->GetModifiers() & vtkWebInteractionEvent::SHIFT_KEY) != 0 ? 1 : 0;

  // Handle scroll action if any
  if (event->GetScroll())
  {
    iren->SetEventInformation(0, 0, ctrlKey, shiftKey, event->GetKeyCode(), 0);
    iren->MouseMoveEvent();
    iren->RightButtonPressEvent();
    iren->SetEventInformation(
      0, event->GetScroll() * 10, ctrlKey, shiftKey, event->GetKeyCode(), 0);
    iren->MouseMoveEvent();
    iren->RightButtonReleaseEvent();
    this->Internals->ImageCache[view].NeedsRender = true;
    return true;
  }

  const int* viewSize = view->GetSize();
  int posX = std::floor(viewSize[0] * event->GetX() + 0.5);
  int posY = std::floor(viewSize[1] * event->GetY() + 0.5);

  iren->SetEventInformation(
    posX, posY, ctrlKey, shiftKey, event->GetKeyCode(), event->GetRepeatCount());

  unsigned int prev_buttons = this->Internals->ButtonStates[view];
  unsigned int changed_buttons = (event->GetButtons() ^ prev_buttons);
  iren->MouseMoveEvent();
  if ((changed_buttons & vtkWebInteractionEvent::LEFT_BUTTON) != 0)
  {
    if ((event->GetButtons() & vtkWebInteractionEvent::LEFT_BUTTON) != 0)
    {
      iren->LeftButtonPressEvent();
      if (event->GetRepeatCount() > 0)
      {
        iren->LeftButtonReleaseEvent();
      }
    }
    else
    {
      iren->LeftButtonReleaseEvent();
    }
  }

  if ((changed_buttons & vtkWebInteractionEvent::RIGHT_BUTTON) != 0)