area_picking_event.h

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#pragma once
 
#include <pcl/pcl_macros.h>
 
#include <map>
 
namespace pcl
{
  namespace visualization
  {
    /** /brief Class representing 3D area picking events. */
    class PCL_EXPORTS AreaPickingEvent
    {
      public:
        AreaPickingEvent (std::map<std::string, pcl::Indices> cloud_indices)
        : cloud_indices_ (std::move(cloud_indices))
        {}
 
        /** \brief For situations where a whole area is selected, return the points indices.
          * \param[out] indices indices of the points under the area selected by user.
          * \return true, if the area selected by the user contains points, false otherwise
          */
        inline bool
        getPointsIndices (pcl::Indices& indices) const
        {
          if (cloud_indices_.empty())
            return (false);
 
          for (const auto& i : cloud_indices_)
            indices.insert(indices.cend (), i.second.cbegin (), i.second.cend ());
 
          return (true);
        }
        /** \brief For situations where a whole area is selected, return the names
          * of the selected point clouds.
          * \return The names of selected point clouds
          */
        inline std::vector<std::string>
        getCloudNames () const
        {
          std::vector<std::string> names;
          names.reserve(cloud_indices_.size());
          
          for (const auto& i : cloud_indices_)
            names.push_back (i.first);
          return names;
        }
        /** \brief For situations where a whole area is selected, return the points indices
          * for a given point cloud
          * \param[in] name of selected clouds.
          * \return The indices for the selected cloud.
          */
        inline Indices
        getPointsIndices (const std::string& name) const
        {
          const auto cloud = cloud_indices_.find (name);
          if(cloud == cloud_indices_.cend ())
            return {};
 
          return cloud->second;
        }
 
      private:
        std::map<std::string, pcl::Indices> cloud_indices_;
    };
  } //namespace visualization
} //namespace pcl