Identify graphics

// [WriteFile Name=IdentifyGraphics, Category=DisplayInformation]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

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

// sample headers
#include "IdentifyGraphics.h"

// ArcGIS Maps SDK headers
#include "Geometry.h"
#include "Graphic.h"
#include "GraphicListModel.h"
#include "GraphicsOverlay.h"
#include "GraphicsOverlayListModel.h"
#include "IdentifyGraphicsOverlayResult.h"
#include "Map.h"
#include "MapQuickView.h"
#include "MapTypes.h"
#include "PolygonBuilder.h"
#include "SimpleFillSymbol.h"
#include "SimpleRenderer.h"
#include "SpatialReference.h"
#include "SymbolTypes.h"

// Qt headers
#include <QFuture>
#include <QList>
#include <QMouseEvent>
#include <QUuid>

// STL headers
#include <memory>

using namespace Esri::ArcGISRuntime;

IdentifyGraphics::IdentifyGraphics(QQuickItem* parent) :
  QQuickItem(parent)
{
}

IdentifyGraphics::~IdentifyGraphics() = default;

void IdentifyGraphics::init()
{
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<IdentifyGraphics>("Esri.Samples", 1, 0, "IdentifyGraphicsSample");
}

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

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

  // Create a map using the topographic basemap
  m_map = new Map(BasemapStyle::ArcGISTopographic, this);
  // set map on the map view
  m_mapView->setMap(m_map);

  // create a new graphics overlay
  m_graphicsOverlay = new GraphicsOverlay(this);

  // assign a renderer to the graphics overlay
  SimpleFillSymbol* simpleFillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(255, 255, 0, 180), this);
  SimpleRenderer* simpleRenderer = new SimpleRenderer(simpleFillSymbol, this);
  m_graphicsOverlay->setRenderer(simpleRenderer);

  // add the overlay to the mapview
  m_mapView->graphicsOverlays()->append(m_graphicsOverlay);

  // add polygon graphics
  addPolygonGraphic();

  // connect signals
  connectSignals();
}

// create the polygon geometry and graphic
void IdentifyGraphics::addPolygonGraphic()
{
  // create the polygon using the builder class
  PolygonBuilder polygonBuilder(SpatialReference::webMercator());
  polygonBuilder.addPoint(-20e5, 20e5);
  polygonBuilder.addPoint(20e5, 20e5);
  polygonBuilder.addPoint(20e5, -20e5);
  polygonBuilder.addPoint(-20e5, -20e5);

  // create the graphic and add to the graphics overlay
  Graphic* graphic = new Graphic(polygonBuilder.toGeometry(), this);
  m_graphicsOverlay->graphics()->append(graphic);
}

void IdentifyGraphics::connectSignals()
{
  //! [identify graphics api snippet]
  // connect to the mouse clicked signal on the MapQuickView
  connect(m_mapView, &MapQuickView::mouseClicked, this, [this](QMouseEvent& mouseEvent)
  {
    // call identify on the map view
    constexpr double tolerance = 5.0;
    constexpr bool returnPopupsOnly = false;
    constexpr int maximumResults = 1;

    m_mapView->identifyGraphicsOverlayAsync(m_graphicsOverlay, mouseEvent.position(), tolerance, returnPopupsOnly, maximumResults).then(this,
    [this](IdentifyGraphicsOverlayResult* rawIdentifyResult)
    {
      // Delete rawIdentifyResult on leaving scope.
      auto identifyResult = std::unique_ptr<IdentifyGraphicsOverlayResult>(rawIdentifyResult);

      if (identifyResult)
      {
        m_identifiedGraphicsCount = identifyResult->graphics().size();
        emit identifiedGraphicsCountChanged();
      }
    });

  });
  //! [identify graphics api snippet]
}

int IdentifyGraphics::identifiedGraphicsCount()
{
  return m_identifiedGraphicsCount;
}

// [WriteFile Name=IdentifyGraphics, Category=DisplayInformation]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

#ifndef IDENTIFY_GRAPHICS_H
#define IDENTIFY_GRAPHICS_H

// Qt headers
#include <QQuickItem>

namespace Esri::ArcGISRuntime
{
  class Map;
  class MapQuickView;
  class GraphicsOverlay;
}

class IdentifyGraphics : public QQuickItem
{
  Q_OBJECT

  Q_PROPERTY(int identifiedGraphicsCount READ identifiedGraphicsCount NOTIFY identifiedGraphicsCountChanged)

public:
  explicit IdentifyGraphics(QQuickItem* parent = nullptr);
  ~IdentifyGraphics() override;

  void componentComplete() override;
  static void init();

signals:
  void identifiedGraphicsCountChanged();

private:
  void addPolygonGraphic();
  void connectSignals();
  int identifiedGraphicsCount();

private:
  Esri::ArcGISRuntime::Map* m_map = nullptr;
  Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr;
  Esri::ArcGISRuntime::GraphicsOverlay* m_graphicsOverlay = nullptr;
  int m_identifiedGraphicsCount = 0;
};

#endif // IDENTIFY_GRAPHICS_H

// [WriteFile Name=IdentifyGraphics, Category=DisplayInformation]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick
import QtQuick.Controls
import Esri.Samples

IdentifyGraphicsSample {
    id: identifyGraphicsSample
    width: 800
    height: 600

    // add a mapView component
    MapView {
        anchors.fill: parent
        objectName: "mapView"

        Component.onCompleted: {
            // Set the focus on MapView to initially enable keyboard navigation
            forceActiveFocus();
        }
    }

    onIdentifiedGraphicsCountChanged: {
        if (identifyGraphicsSample.identifiedGraphicsCount > 0)
            msgDialog.open();
    }

    Dialog {
        id: msgDialog
        modal: true
        x: Math.round(parent.width - width) / 2
        y: Math.round(parent.height - height) / 2
        standardButtons: Dialog.Ok
        Text {
            text: "Tapped on graphic"
        }
    }
}