Method DispatchEvent

Rendering/UI/vtkXRenderWindowInteractor.cxx:596–1062

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//------------------------------------------------------------------------------
void vtkXRenderWindowInteractor::DispatchEvent(XEvent* event)
{
  int xp, yp;

  switch (event->type)
  {
    case Expose:
    {
      if (!this->Enabled)
      {
        return;
      }
      XEvent result;
      while (vtkXCheckTypedWindowEvent(this->DisplayId, this->WindowId, Expose, &result))
      {
        // just getting the expose configure event
        event = &result;
      }
      XExposeEvent* exposeEvent = reinterpret_cast<XExposeEvent*>(event);
      this->SetEventSize(exposeEvent->width, exposeEvent->height);
      xp = exposeEvent->x;
      yp = exposeEvent->y;
      yp = this->Size[1] - yp - 1;
      this->SetEventPosition(xp, yp);

      // only render if we are currently accepting events
      if (this->Enabled)
      {
        this->InvokeEvent(vtkCommand::ExposeEvent, nullptr);
        this->Render();
      }
    }
    break;

    case MapNotify:
    {
      // only render if we are currently accepting events
      if (this->Enabled && this->GetRenderWindow()->GetNeverRendered())
      {
        this->Render();
      }
    }
    break;

    case ConfigureNotify:
    {
      XEvent result;
      while (vtkXCheckTypedWindowEvent(this->DisplayId, this->WindowId, ConfigureNotify, &result))
      {
        // just getting the last configure event
        event = &result;
      }
      XConfigureEvent* configureEvent = reinterpret_cast<XConfigureEvent*>(event);
      int width = configureEvent->width;
      int height = configureEvent->height;
      if (width != this->Size[0] || height != this->Size[1])
      {
        bool resizeSmaller = width <= this->Size[0] && height <= this->Size[1];