Show a simple marker symbol on a map.
Use case
Customize the appearance of a point suitable for the data. For example, a point on the map styled with a circle could represent a drilled borehole location, whereas a cross could represent the location of an old coal mine shaft.
How to use the sample
The sample loads with a predefined simple marker symbol, set as a red circle.
How it works
- Create a
SimpleMarkerSymbol(SimpleMarkerSymbolStyle, color, size)
. - Create a
Graphic
passing in aPoint
and the simple marker symbol as parameters. - Add the graphic to the graphics overlay with
graphicsOverlay::graphics()::append(graphic)
.
Relevant API
- Graphic
- GraphicsOverlay
- Point
- SimpleMarkerSymbol
Tags
symbol
Sample Code
// [WriteFile Name=Simple_Marker_Symbol, 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
#include "Simple_Marker_Symbol.h"
#include "Basemap.h"
#include "Graphic.h"
#include "GraphicsOverlay.h"
#include "Point.h"
#include "Map.h"
#include "MapQuickView.h"
#include "SimpleMarkerSymbol.h"
#include "SpatialReference.h"
#include "Viewpoint.h"
using namespace Esri::ArcGISRuntime;
Simple_Marker_Symbol::Simple_Marker_Symbol(QQuickItem* parent) :
QQuickItem(parent)
{
}
Simple_Marker_Symbol::~Simple_Marker_Symbol() = default;
void Simple_Marker_Symbol::init()
{
qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
qmlRegisterType<Simple_Marker_Symbol>("Esri.Samples", 1, 0, "Simple_Marker_SymbolSample");
}
void Simple_Marker_Symbol::componentComplete()
{
QQuickItem::componentComplete();
// find QML MapView component
m_mapView = findChild<MapQuickView*>("mapView");
m_mapView->setWrapAroundMode(WrapAroundMode::Disabled);
// create a map using the imagery basemap
m_map = new Map(BasemapStyle::ArcGISImageryStandard, this);
// set initial viewpoint
m_map->setInitialViewpoint(Viewpoint(Point(-226773, 6550477, SpatialReference::webMercator()), 7500));
// create a GraphicsOverlay
m_graphicsOverlay = new GraphicsOverlay(this);
// create red circle graphic
Graphic* redCircle = new Graphic(Point(-226773, 6550477, SpatialReference::webMercator()), this);
SimpleMarkerSymbol* redCircleSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor("red"), 12, this);
redCircle->setSymbol(redCircleSymbol);
// append to graphics overlay
m_graphicsOverlay->graphics()->append(redCircle);
// add the GraphicsOverlay to map view
m_mapView->graphicsOverlays()->append(m_graphicsOverlay);
// set map to map view
m_mapView->setMap(m_map);
}