Change viewpoint

// [WriteFile Name=ChangeViewpoint, Category=Maps]
// [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 "ChangeViewpoint.h"

// ArcGIS Maps SDK headers
#include "Basemap.h"
#include "Envelope.h"
#include "Map.h"
#include "MapQuickView.h"
#include "MapTypes.h"
#include "MapViewTypes.h"
#include "Point.h"
#include "SpatialReference.h"
#include "Viewpoint.h"

// Qt headers
#include <QFuture>

using namespace Esri::ArcGISRuntime;

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

ChangeViewpoint::~ChangeViewpoint() = default;

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

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

  // create a new basemap instance
  Basemap* basemap = new Basemap(BasemapStyle::ArcGISImagery, this);
  // create a new map instance
  m_map = new Map(basemap, this);
  // set map on the map view
  m_mapView->setMap(m_map);
}

void ChangeViewpoint::changeViewpoint(QString viewpoint)
{
  if (viewpoint == "Center")
  {
    Point ptEsriHeadquarters(-117.195681,34.056218, SpatialReference(4326));
    m_mapView->setViewpointCenterAsync(ptEsriHeadquarters);
  }
  else if (viewpoint == "Center and scale")
  {
    Point ptHawaii(-157.564, 20.677, SpatialReference(4236));
    m_mapView->setViewpointCenterAsync(ptHawaii, 4000000.0);
  }
  else if (viewpoint == "Geometry")
  {
    Envelope envBeijing(116.380, 39.920, 116.400, 39.940, SpatialReference(4236));
    m_mapView->setViewpointGeometryAsync(envBeijing);
  }
  else if (viewpoint == "Geometry and padding")
  {
    Envelope envBeijing(116.380, 39.920, 116.400, 39.940, SpatialReference(4236));
    m_mapView->setViewpointGeometryAsync(envBeijing, 200 * screenRatio());
  }
  else if (viewpoint == "Rotation")
  {
    m_rotationValue = (m_rotationValue + 45) % 360;
    m_mapView->setViewpointRotationAsync(m_rotationValue);
  }
  else if (viewpoint == "Scale 1:5,000,000")
  {
    m_mapView->setViewpointScaleAsync(5000000.0);
  }
  else if (viewpoint == "Scale 1:10,000,000")
  {
    m_mapView->setViewpointScaleAsync(10000000.0);
  }
  else if (viewpoint == "Animation")
  {
    //! [set viewpoint api snippet]
    constexpr double xMin = -12338668.348591767;
    constexpr double yMin = 5546908.424239618;
    constexpr double xMax = -12338247.594362013;
    constexpr double yMax = 5547223.989911933;
    constexpr int wkid = 102100;
    Viewpoint vpSpring(Envelope(xMin, yMin, xMax, yMax, SpatialReference(wkid)));
    constexpr float duration = 4.0f;
    m_mapView->setViewpointAsync(vpSpring, duration, AnimationCurve::EaseInOutCubic);
    //! [set viewpoint api snippet]
  }
}

MapQuickView* ChangeViewpoint::mapQuickView() const
{
  return m_mapView;
}

void ChangeViewpoint::setMapQuickView(MapQuickView* mapView)
{
  m_mapView = mapView;
  emit mapQuickViewChanged();
}

double ChangeViewpoint::screenRatio() const
{
  const double width = static_cast<double>(m_mapView->width());
  const double height = static_cast<double>(m_mapView->height());
  return height > width ? width / height : height / width;
}

// [WriteFile Name=ChangeViewpoint, Category=Maps]
// [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 CHANGE_VIEWPOINT_H
#define CHANGE_VIEWPOINT_H

// Qt headers
#include <QQuickItem>

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

Q_MOC_INCLUDE("MapQuickView.h")

class ChangeViewpoint : public QQuickItem
{
  Q_PROPERTY(Esri::ArcGISRuntime::MapQuickView* mapView READ mapQuickView WRITE setMapQuickView NOTIFY mapQuickViewChanged)
  Q_OBJECT

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

  void componentComplete() override;
  static void init();
  Q_INVOKABLE void changeViewpoint(QString viewpoint);

signals:
  void mapQuickViewChanged();

private:
  Esri::ArcGISRuntime::MapQuickView* mapQuickView() const;
  void setMapQuickView(Esri::ArcGISRuntime::MapQuickView* mapView);

  double screenRatio() const;

  Esri::ArcGISRuntime::Map* m_map = nullptr;
  Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr;
  int m_rotationValue = 0;
};

#endif // CHANGE_VIEWPOINT_H

// [WriteFile Name=ChangeViewpoint, Category=Maps]
// [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

ChangeViewpointSample {
    id: changeViewpointSample
    width: 800
    height: 600

    // add a mapView component
    MapView {
        id: mapQuickView
        anchors.fill: parent

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

    ComboBox {
        id: comboBoxViewpoint
        anchors {
            left: parent.left
            top: parent.top
            margins: 15
        }

        // Add a background to the ComboBox
        Rectangle {
            anchors.fill: parent
            radius: 10
            // Make the rectangle visible if a dropdown indicator exists
            // An indicator only exists if a theme is set
            visible: parent.indicator
            border.width: 1
        }

        property int bestWidth: implicitWidth

        width: bestWidth + rightPadding + leftPadding + 20

        model: [ "Center",
                 "Center and scale",
                 "Geometry",
                 "Geometry and padding",
                 "Rotation",
                 "Scale 1:5,000,000",
                 "Scale 1:10,000,000",
                 "Animation" ]

        onCurrentTextChanged: {
            // Call C++ invokable function to change the viewpoint
            changeViewpointSample.changeViewpoint(comboBoxViewpoint.currentText);
        }

        onModelChanged: {
            let w = bestWidth;
            for (let i = 0; i < comboBoxViewpoint.model.length; ++i) {
                metrics.text = comboBoxViewpoint.model[i];
                w = Math.max(w, metrics.width);
            }
            bestWidth = w;
        }

        TextMetrics {
            id: metrics
            font: comboBoxViewpoint.font
        }
    }
}