.. _program_listing_file_MRMLDM_vtkMRMLLayerDMInteractionLogic.h:

Program Listing for File vtkMRMLLayerDMInteractionLogic.h
=========================================================

|exhale_lsh| :ref:`Return to documentation for file <file_MRMLDM_vtkMRMLLayerDMInteractionLogic.h>` (``MRMLDM/vtkMRMLLayerDMInteractionLogic.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #pragma once
   
   #include "vtkSlicerLayerDMModuleMRMLDisplayableManagerExport.h"
   
   // VTK includes
   #include <vtkObject.h>
   #include <vtkSmartPointer.h>
   #include <vtkWeakPointer.h>
   
   // STL includes
   #include <vector>
   
   class vtkMRMLLayerDMPipelineI;
   class vtkMRMLInteractionEventData;
   class vtkMRMLAbstractViewNode;
   
   class VTK_SLICER_LAYERDM_MODULE_MRMLDISPLAYABLEMANAGER_EXPORT vtkMRMLLayerDMInteractionLogic : public vtkObject
   {
   public:
     static vtkMRMLLayerDMInteractionLogic* New();
     vtkTypeMacro(vtkMRMLLayerDMInteractionLogic, vtkObject);
   
     void AddPipeline(const vtkSmartPointer<vtkMRMLLayerDMPipelineI>& pipeline);
     bool CanProcessInteractionEvent(vtkMRMLInteractionEventData* eventData, double& distance2);
     std::vector<vtkSmartPointer<vtkMRMLLayerDMPipelineI>> GetCanProcessPipelines() const;
     vtkMRMLLayerDMPipelineI* GetLastFocusedPipeline() const;
     void LoseFocus(vtkMRMLInteractionEventData* eventData);
     void LoseFocus();
     bool ProcessInteractionEvent(vtkMRMLInteractionEventData* eventData);
     void RemovePipeline(const vtkSmartPointer<vtkMRMLLayerDMPipelineI>& pipeline);
     void SetViewNode(vtkMRMLAbstractViewNode* viewNode);
   
   protected:
     vtkMRMLLayerDMInteractionLogic();
     ~vtkMRMLLayerDMInteractionLogic() override = default;
   
   private:
     static int MinWidgetState();
     std::tuple<double, int> PrioritizeCanProcessPipelines(vtkMRMLInteractionEventData* eventData);
     void LosePreviousFocusInCannotProcess(vtkMRMLInteractionEventData* eventData);
   
     std::vector<vtkSmartPointer<vtkMRMLLayerDMPipelineI>> m_pipelines;
     vtkSmartPointer<vtkMRMLLayerDMPipelineI> m_prevFocusedPipeline;
     std::vector<vtkSmartPointer<vtkMRMLLayerDMPipelineI>> m_canProcess;
     vtkWeakPointer<vtkMRMLAbstractViewNode> m_viewNode;
   };