Set surface placement mode

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// [WriteFile Name=SetSurfacePlacementMode, Category=Scenes]
// [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

#include "SetSurfacePlacementMode.h"

#include "ArcGISSceneLayer.h"
#include "ArcGISTiledElevationSource.h"
#include "Camera.h"
#include "Graphic.h"
#include "GraphicsOverlay.h"
#include "Point.h"
#include "Scene.h"
#include "SceneQuickView.h"
#include "SimpleMarkerSymbol.h"
#include "SpatialReference.h"
#include "TextSymbol.h"
#include "Viewpoint.h"
#include "MapTypes.h"
#include "SymbolTypes.h"
#include "GraphicsOverlayListModel.h"
#include "GraphicListModel.h"
#include "Surface.h"
#include "ElevationSourceListModel.h"
#include "LayerSceneProperties.h"
#include "LayerListModel.h"
#include "SceneViewTypes.h"

using namespace Esri::ArcGISRuntime;

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

SetSurfacePlacementMode::~SetSurfacePlacementMode() = default;

void SetSurfacePlacementMode::init()
{
  qmlRegisterType<SceneQuickView>("Esri.Samples", 1, 0, "SceneView");
  qmlRegisterType<SetSurfacePlacementMode>("Esri.Samples", 1, 0, "SetSurfacePlacementModeSample");
}

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

  //! [Create Scene API snippet]
  // Create a scene with the imagery basemap and world elevation surface
  m_sceneView = findChild<SceneQuickView*>("sceneView");
  Scene* scene = new Scene(BasemapStyle::ArcGISImageryStandard, this);
  Surface* surface = new Surface(this);
  surface->elevationSources()->append(new ArcGISTiledElevationSource(QUrl("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer"), this));
  scene->setBaseSurface(surface);

  // Create scene layer from the Brest, France scene server.
  ArcGISSceneLayer* sceneLayer = new ArcGISSceneLayer(QUrl("https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/Buildings_Brest/SceneServer"), this);
  scene->operationalLayers()->append(sceneLayer);
  //! [Create Scene API snippet]

  // set an initial viewpoint
  const Point initialViewPoint(-4.45968, 48.3889, 37.9922);
  const Camera camera(initialViewPoint, 329.91, 96.6632, 0);
  const Viewpoint viewpoint(initialViewPoint, camera);
  scene->setInitialViewpoint(viewpoint);

  // set the scene to the scene view
  m_sceneView->setArcGISScene(scene);

  // add graphics overlays and set surface placement
  addGraphicsOverlays();

  // add graphics
  addGraphics();
}

void SetSurfacePlacementMode::addGraphicsOverlays()
{
  // Graphics overlay with draped billboarded surface placement
  m_drapedBillboardedOverlay = new GraphicsOverlay(this);
  m_drapedBillboardedOverlay->setSceneProperties(LayerSceneProperties(SurfacePlacement::DrapedBillboarded));
  m_sceneView->graphicsOverlays()->append(m_drapedBillboardedOverlay);

  // Graphics overlay with draped flat surface placement
  m_drapedFlatOverlay = new GraphicsOverlay(this);
  m_drapedFlatOverlay->setSceneProperties(LayerSceneProperties(SurfacePlacement::DrapedFlat));
  m_drapedFlatOverlay->setVisible(false);
  m_sceneView->graphicsOverlays()->append(m_drapedFlatOverlay);

  // Graphics overlay with relative surface placement
  m_relativeOverlay = new GraphicsOverlay(this);
  m_relativeOverlay->setSceneProperties(LayerSceneProperties(SurfacePlacement::Relative));
  m_sceneView->graphicsOverlays()->append(m_relativeOverlay);

  // Graphics overlay with relative to scene surface placement
  m_relativeToSceneOverlay = new GraphicsOverlay(this);
  m_relativeToSceneOverlay->setSceneProperties(LayerSceneProperties(SurfacePlacement::RelativeToScene));
  m_sceneView->graphicsOverlays()->append(m_relativeToSceneOverlay);

  // Graphics overlay with absolute surface placement
  m_absoluteOverlay = new GraphicsOverlay(this);
  m_absoluteOverlay->setSceneProperties(LayerSceneProperties(SurfacePlacement::Absolute));
  m_sceneView->graphicsOverlays()->append(m_absoluteOverlay);
}

void SetSurfacePlacementMode::addGraphics()
{
  // create point for the scene related graphic with a z value of 70
  const Point sceneRelatedPoint(-4.4610562, 48.3902727, 70, SpatialReference::wgs84());

  // create point for the surface related graphics with z value of 70
  const Point surfaceRelatedPoint(-4.4609257, 48.3903965 , 70, SpatialReference::wgs84());

  // create simple marker symbol
  SimpleMarkerSymbol* simpleMarkerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Triangle, QColor("red"), 20, this);

  // create text symbols
  TextSymbol* drapedBillboardedText = new TextSymbol("DRAPED BILLBOARDED", QColor("blue"), 20, HorizontalAlignment::Left, VerticalAlignment::Middle, this);
  drapedBillboardedText->setOffsetX(20);
  TextSymbol* drapedFlatText = new TextSymbol("DRAPED FLAT", QColor("blue"), 20, HorizontalAlignment::Left, VerticalAlignment::Middle, this);
  drapedFlatText->setOffsetX(20);
  TextSymbol* relativeText = new TextSymbol("RELATIVE", QColor("blue"), 20, HorizontalAlignment::Left, VerticalAlignment::Middle, this);
  relativeText->setOffsetX(20);
  TextSymbol* relativeToSceneText = new TextSymbol("RELATIVE TO SCENE", QColor("blue"), 20, HorizontalAlignment::Right, VerticalAlignment::Middle, this);
  relativeToSceneText->setOffsetX(-20);
  TextSymbol* absoluteText = new TextSymbol("ABSOLUTE", QColor("blue"), 20, HorizontalAlignment::Left, VerticalAlignment::Middle, this);
  absoluteText->setOffsetX(20);

  // add graphics to each overlay
  // Graphics will be draped on the surface of the scene and will always face the camera.
  m_drapedBillboardedOverlay->graphics()->append(new Graphic(surfaceRelatedPoint, simpleMarkerSymbol));
  m_drapedBillboardedOverlay->graphics()->append(new Graphic(surfaceRelatedPoint, drapedBillboardedText));

  // Graphics will be draped on the surface of the scene
  m_drapedFlatOverlay->graphics()->append(new Graphic(surfaceRelatedPoint, simpleMarkerSymbol));
  m_drapedFlatOverlay->graphics()->append(new Graphic(surfaceRelatedPoint, drapedFlatText));

  // Graphics will be placed at z value relative to the surface
  m_relativeOverlay->graphics()->append(new Graphic(surfaceRelatedPoint, simpleMarkerSymbol));
  m_relativeOverlay->graphics()->append(new Graphic(surfaceRelatedPoint, relativeText));

  // Graphics will be placed at z value relative to the scene
  m_relativeToSceneOverlay->graphics()->append(new Graphic(sceneRelatedPoint, simpleMarkerSymbol));
  m_relativeToSceneOverlay->graphics()->append(new Graphic(sceneRelatedPoint, relativeToSceneText));

  // Graphics will be placed at absolute z value
  m_absoluteOverlay->graphics()->append(new Graphic(surfaceRelatedPoint, simpleMarkerSymbol));
  m_absoluteOverlay->graphics()->append(new Graphic(surfaceRelatedPoint, absoluteText));
}

void SetSurfacePlacementMode::changeDrapedVisibility()
{
  m_drapedFlatOverlay->setVisible(!m_drapedFlatOverlay->isVisible());
  m_drapedBillboardedOverlay->setVisible(!m_drapedBillboardedOverlay->isVisible());
}

void SetSurfacePlacementMode::changeZValue(double zValue)
{
  for (GraphicsOverlay* overlay : *m_sceneView->graphicsOverlays())
  {
    for (Graphic* graphic : *overlay->graphics())
    {
      // create new graphic with the same existing information but a new Z-value
      const Point graphicPoint{graphic->geometry()};
      const Point point{graphicPoint.x(), graphicPoint.y(), zValue, graphicPoint.spatialReference()};
      graphic->setGeometry(point);
    }
  }
}