在地图中绘制多个标记 ArcGIS Qt

如何解决在地图中绘制多个标记 ArcGIS Qt

我有一个应用程序，用于在 ArcGIS 地图上绘制横断面。我想在横断面上的所有点上显示一个标记。目前，标记只显示在最近的点击点。我希望标记显示在所有点击的点上。我见过的大多数问题都涉及 QML。

这是CPP文件

#ifdef PCH_BUILD
#include "pch.hpp"
#endif // PCH_BUILD

#include "Geodesicoperations.h"

#include "Map.h"
#include "MapQuickView.h"
#include "GraphicsOverlay.h"
#include "Graphic.h"
#include "SimpleMarkerSymbol.h"
#include "SimpleLinesymbol.h"
#include "GeometryEngine.h"
#include "SpatialReference.h"
#include "polylineBuilder.h"
#include "Point.h"
#include <QDebug>

using namespace Esri::ArcGISRuntime;

Geodesicoperations::Geodesicoperations(QQuickItem* parent /* = nullptr */):
  QQuickItem(parent)
{
}

void Geodesicoperations::init()
{
  // Register the map view for QML
  qmlRegisterType<MapQuickView>("Esri.Samples",1,"MapView");
  qmlRegisterType<Geodesicoperations>("Esri.Samples","GeodesicoperationsSample");

}

void Geodesicoperations::componentComplete()
{
  QQuickItem::componentComplete();

  // find QML MapView component
  m_mapView = findChild<MapQuickView*>("mapView");

  // Create a map using the imagery basemap
  m_map = new Map(BasemapStyle::ArcGISImageryStandard,this);

  // Set map to map view
  m_mapView->setMap(m_map);

  // Create a GraphicsOverlay
   GraphicsOverlay* graphicsOverlay = new GraphicsOverlay(this);
   m_mapView->graphicsOverlays()->append(graphicsOverlay);

   // Create Graphic Symbols
   SimpleMarkerSymbol* markerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle,QColor("red"),10.0f /*size*/,this);
   SimpleLinesymbol* pathSymbol = new SimpleLinesymbol(SimpleLinesymbolStyle::Dash,QColor("yellow"),5.0f /*width*/,this);

   // Create source graphic
   const Point nycPoint(73.8021,15.4561,SpatialReference::wgs84());
   m_nycGraphic = new Graphic(nycPoint,markerSymbol,this);
   
   graphicsOverlay->graphics()->append(m_nycGraphic);

   // Create destination graphic
   m_destinationGraphic = new Graphic(this);
   m_destinationGraphic->setSymbol(markerSymbol);
   graphicsOverlay->graphics()->append(m_destinationGraphic);

   // Create path graphic
   m_pathGraphic = new Graphic(this);
   m_pathGraphic->setSymbol(pathSymbol);
   graphicsOverlay->graphics()->append(m_pathGraphic);

   polylineBuilder* polylineBuilder=new polylineBuilder(SpatialReference::wgs84(),this);
   
   // connect to mouse clicked signal
    connect(m_mapView,&MapQuickView::mouseClicked,this,[ this,polylineBuilder](QMouseEvent& mouseEvent)
   
    {

      // re-project the point to match the NYC graphic
      const Point clickedPoint = m_mapView->screenToLocation(mouseEvent.x(),mouseEvent.y());
      const Point destination = GeometryEngine::project(clickedPoint,m_nycGraphic->geometry().spatialReference());

      // update the destination graphic

      m_destinationGraphic->setGeometry(destination);



      


       polylineBuilder->addPoint(destination);

       
       polyline polyline = polylineBuilder->topolyline();



      // densify the path as a geodesic curve and show it with the path graphic
      constexpr double maxSegmentLength = 1.0;
      const LinearUnit unitOfMeasurement(LinearUnitId::Kilometers);
      constexpr GeodeticCurveType curveType = GeodeticCurveType::normalSection;



      const Geometry pathGeometry = GeometryEngine::densifyGeodetic(polyline,maxSegmentLength,unitOfMeasurement,curveType);

      // update the graphic
      m_pathGraphic->setGeometry(pathGeometry);

      // calculate the path's geodetic length
      m_distanceText = QString::number(GeometryEngine::lengthGeodetic(pathGeometry,curveType),'f',2);
      emit distanceTextChanged();
    });
  }



QString Geodesicoperations::distanceText() const
{
  return m_distanceText;
}

Pic of the issue