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// [WriteFile Name=CreateSymbolStylesFromWebStyles, Category=DisplayInformation]
// [Legal]
// Copyright 2021 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 "CreateSymbolStylesFromWebStyles.h"
#include "FeatureLayer.h"
#include "Map.h"
#include "MapQuickView.h"
#include "ServiceFeatureTable.h"
#include "SymbolStyle.h"
#include "SymbolStyleSearchResultSymbolFetcher.h"
#include "UniqueValueRenderer.h"
#include "MapTypes.h"
#include "LayerListModel.h"
#include "SymbolStyleSearchParameters.h"
#include "SymbolStyleSearchResultListModel.h"
#include "SymbolStyleSearchResult.h"
#include "TaskWatcher.h"
#include "UniqueValue.h"
#include "UniqueValueListModel.h"
#include "SpatialReference.h"
#include "Point.h"
#include "Symbol.h"
#include <QUuid>
using namespace Esri::ArcGISRuntime;
CreateSymbolStylesFromWebStyles::CreateSymbolStylesFromWebStyles(QObject* parent /* = nullptr */):
QObject(parent),
m_map(new Map(BasemapStyle::ArcGISNavigation, this))
{
const QUrl webStyleLayerUrl = QUrl("https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/LA_County_Points_of_Interest/FeatureServer/0");
m_webStyleLayer = new FeatureLayer(new ServiceFeatureTable(webStyleLayerUrl, this), this);
m_uniqueValueRenderer = new UniqueValueRenderer(this);
// The UniqueValueRenderer will affect specific features based on the values of the specified FieldName(s)
m_uniqueValueRenderer->setFieldNames({"cat2"});
// The UniqueValueRenderer defines how features of a FeatureLayer are stylized
// Without an overriding UniqueValueRenderer, features from m_webStyleLayer will use the web layer's default gray circle style
m_webStyleLayer->setRenderer(m_uniqueValueRenderer);
m_map->operationalLayers()->append(m_webStyleLayer);
// Set the scale at which feature symbols and text will appear at their default size
m_map->setReferenceScale(100'000);
createSymbolStyles();
}
void CreateSymbolStylesFromWebStyles::createSymbolStyles()
{
QMap<QString,QStringList> categoriesMap = createCategoriesMap();
SymbolStyle* symbolStyle = new SymbolStyle("Esri2DPointSymbolsStyle", {}, this);
SymbolStyleSearchParameters searchParams;
searchParams.setKeysStrictlyMatch(true);
connect(symbolStyle, &SymbolStyle::searchSymbolsCompleted, this, [this, symbolStyle, categoriesMap](QUuid /* taskId */, SymbolStyleSearchResultListModel* searchResults)
{
m_legendInfoListModel = searchResults;
emit legendInfoListModelChanged();
const auto results = searchResults->searchResults();
for (const SymbolStyleSearchResult& symbolStyleSearchResult : results)
{
const QString symbolLabel = symbolStyleSearchResult.key();
// We pass symbolStyle as the QObject parent for fetchSymbol() because we don't need access to the resulting class outside the lifetime of this SymbolStyle
SymbolStyleSearchResultSymbolFetcher* symbolFetcher = symbolStyleSearchResult.fetchSymbol(symbolStyle);
connect(symbolFetcher, &SymbolStyleSearchResultSymbolFetcher::fetchSymbolCompleted, this, [this, symbolLabel, categoriesMap](QUuid /* taskId */, Symbol* symbol)
{
// If multiple field names are set, we can pass multiple values from each field,
// However, even though we are using the same symbol, we must create a UniqueValue for each value from the same field
// When the FeatureLayer is rendered, all features with a matching value in the specified FieldNames will appear with the defined UniqueValue
for (const QString &category : categoriesMap[symbolLabel])
{
m_uniqueValueRenderer->uniqueValues()->append(new UniqueValue(symbolLabel, "", {category}, symbol, this));
}
});
}
});
searchParams.setKeys(categoriesMap.keys());
symbolStyle->searchSymbols(searchParams);
}
CreateSymbolStylesFromWebStyles::~CreateSymbolStylesFromWebStyles() = default;
void CreateSymbolStylesFromWebStyles::init()
{
// Register the map view for QML
qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
qmlRegisterType<CreateSymbolStylesFromWebStyles>("Esri.Samples", 1, 0, "CreateSymbolStylesFromWebStylesSample");
qmlRegisterUncreatableType<QAbstractListModel>("Esri.Samples", 1, 0, "AbstractListModel", "AbstractListModel is uncreateable");
}
MapQuickView* CreateSymbolStylesFromWebStyles::mapView() const
{
return m_mapView;
}
void CreateSymbolStylesFromWebStyles::setMapView(MapQuickView* mapView)
{
if (!mapView || mapView == m_mapView)
return;
m_mapView = mapView;
m_mapView->setMap(m_map);
constexpr double x_longitude = -118.44186;
constexpr double y_latitude = 34.28301;
constexpr double scale = 7000;
const Point centerPt(x_longitude, y_latitude, SpatialReference::wgs84());
m_mapView->setViewpointCenter(centerPt, scale);
connect(m_mapView, &MapQuickView::mapScaleChanged, this, [this]()
{
// Set scale symbols to true when we zoom in so the symbols don't take up the entire view
m_webStyleLayer->setScaleSymbols(m_mapView->mapScale() >= 80'000);
});
emit mapViewChanged();
}
QMap<QString,QStringList> CreateSymbolStylesFromWebStyles::createCategoriesMap()
{
QMap<QString,QStringList> categories;
categories["atm"] << "Banking and Finance";
categories["beach"] << "Beaches and Marinas";
categories["campground"] << "Campgrounds";
categories["city-hall"] << "City Halls" << "Government Offices";
categories["hospital"] << "Hospitals and Medical Centers" << "Health Screening and Testing" << "Health Centers" << "Mental Health Centers";
categories["library"] << "Libraries";
categories["park"] << "Parks and Gardens";
categories["place-of-worship"] << "Churches";
categories["police-station"] << "Sheriff and Police Stations";
categories["post-office"] << "DHL Locations" << "Federal Express Locations";
categories["school"] << "Public High Schools" << "Public Elementary Schools" << "Private and Charter Schools";
categories["trail"] << "Trails";
return categories;
}
