Method OnLeftButtonDown

Interaction/Widgets/vtkSphereWidget.cxx:363–404

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//------------------------------------------------------------------------------
void vtkSphereWidget::OnLeftButtonDown()
{
  if (!this->Interactor)
  {
    return;
  }

  int X = this->Interactor->GetEventPosition()[0];
  int Y = this->Interactor->GetEventPosition()[1];

  // Okay, make sure that the pick is in the current renderer
  if (!this->CurrentRenderer || !this->CurrentRenderer->IsInViewport(X, Y))
  {
    this->State = vtkSphereWidget::Outside;
    return;
  }

  // Okay, we can process this. Try to pick handles first;
  // if no handles picked, then try to pick the sphere.
  vtkAssemblyPath* path = this->GetAssemblyPath(X, Y, 0., this->Picker);

  if (path == nullptr)
  {
    this->State = vtkSphereWidget::Outside;
    return;
  }
  else if (path->GetFirstNode()->GetViewProp() == this->SphereActor)
  {
    this->State = vtkSphereWidget::Moving;
    this->HighlightSphere(1);
  }
  else if (path->GetFirstNode()->GetViewProp() == this->HandleActor)
  {
    this->State = vtkSphereWidget::Positioning;
    this->HighlightHandle(1);
  }

  this->EventCallbackCommand->SetAbortFlag(1);
  this->StartInteraction();
  this->InvokeEvent(vtkCommand::StartInteractionEvent, nullptr);
  this->Interactor->Render();
}

//------------------------------------------------------------------------------
void vtkSphereWidget::OnMouseMove()