Include GeometryEngine

Question

Hello,

I have a program that needs to use GeometryEngine. It is used in this line

const Geometry pointGeom = GeometryEngine::normalizeCentralMeridian(clickedPoint);

When i try to#include <GeometryEngine>

I get an error saying file not found. How to I get access to the the GeometryEngine class?

p.s. I have similar issues with SimpleMarkerSymbol.

johnmarker · Answer

Wow. Yeah... I was definitely a little confused, but it makes a lot more sense now! I appreciate your time and help with all of this!

JamesBallard1 · Answer

Hi john marker‌, It sounds like there is some confusion about some C++ concepts. The Runtime SDK headers provide the declaration of the classes, but as the consumer of these objects, it is your responsibility to make sure they are initialized properly. >I assumed m_polylineBuilder was a default member variable within the class Which class? I assume that is a class you are working with and not one of the classes/files that are included with the Runtime SDK. Here's an example of creating a PolylineBuilder object. Header file: namespace Esri { namespace ArcGISRuntime { class Map; class MapQuickView; class PolylineBuilder; // <====== forward declaration } } #include class Untitled107 : public QObject { Q_OBJECT Q_PROPERTY(Esri::ArcGISRuntime::MapQuickView* mapView READ mapView WRITE setMapView NOTIFY mapViewChanged) public: explicit Untitled107(QObject* parent = nullptr); ~Untitled107() override; signals: void mapViewChanged(); private: Esri::ArcGISRuntime::MapQuickView* mapView() const; void setMapView(Esri::ArcGISRuntime::MapQuickView* mapView); Esri::ArcGISRuntime::PolylineBuilder* m_polyBuilder = nullptr; // <====== declared as a member variable for this project Esri::ArcGISRuntime::Map* m_map = nullptr; Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr; }; ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ And then in the .cpp file, you can include the header and initialize the object #include "Untitled107.h" #include "Basemap.h" #include "Map.h" #include "MapQuickView.h" #include "PolylineBuilder.h" // <=== include Runtime SDK header for this object #include using namespace Esri::ArcGISRuntime; Untitled107::Untitled107(QObject* parent /* = nullptr */): QObject(parent), m_polyBuilder(new PolylineBuilder(SpatialReference::wgs84(), this)), // <=== initialize the object m_map(new Map(Basemap::topographic(this), this)) { } Untitled107::~Untitled107() { } ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ This is an example of adding a PolylineBuilder to one of our template projects.

johnmarker · Answer

Thank you for your help!

I just have one more question. Is there a link to see the .h file of these classes to see what member variables are already declared? For example, to see if m_polylineBuilder is declared and initialized in the .h file or do most of the classes not have member variables to use and I would have to declare and initialize the variable on my own?

Reason for this, I assumed m_polylineBuilder was a default member variable within the class. I tried to use it, however I got an error saying it was undeclared. Once I added

PolylineBuilder* m_polylineBuilder = nullptr;

I also could not declare it with

Esri::ArcGISRuntime::PolylineBuilder* m_polylineBuilder = new Esri::ArcGISRuntime::PolylineBuilder(this);;

Then it worked. But I would have thought this would have been taken care of in the .h file and when i include <polylineBuilder.h> then I would have access to it?