Use a symbol style to display a graphic on a graphics overlay.
Use case
Allows you to customize a graphic by assigning a unique symbol. For example, you may wish to display individual graphics for different landmarks across a region, and to style each one with a unique symbol.
How to use the sample
Pan and zoom around the map. Observe the graphics on the map.
How it works
This sample creates a GraphicsOverlay for various types of graphic elements like, a Point, Line and Polygon graphic. It then adds a point, line, polygon and text graphic with individual symbols of type SimpleMarkerSymbol, SimpleLineSymbol, SimpleFillSymbol and TextSymbol respectively.
- Create a
GraphicsOverlayand add it to theMapView. - Create a
Symbolsuch asSimpleMarkerSymbol,SimpleLineSymbolorSimpleFillSymbol. - Create a
Graphic, specifying aGeometryand aSymbol. - Add the
Graphicto theGraphicsOverlay.
Relevant API
- Geometry
- Graphic
- GraphicsOverlay
- SimpleFillSymbol
- SimpleLineSymbol
- SimpleMarkerSymbol
Additional information
To set a symbol style across a number of graphics (e.g. showing trees as graphics sharing a symbol in a park), see the "Add graphics with renderer" sample.
Tags
display, fill, graphics, line, marker, overlay, point, symbol
Sample Code
GOSymbols.qml
// [WriteFile Name=GOSymbols, 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 2.6
import QtQuick.Controls 2.2
import Esri.ArcGISRuntime 100.15
Rectangle {
width: 800
height: 600
property var buoyLocArray: []
property var symbolTextArray: ["Craigleith", "Bass Rock"]
property var textLocArray: []
//! [GOSymbols MapView]
// Map view UI presentation at top
MapView {
id: mapView
anchors.fill: parent
Component.onCompleted: {
// Set the focus on MapView to initially enable keyboard navigation
forceActiveFocus();
}
Map {
Basemap {
initStyle: Enums.BasemapStyleArcGISOceans
}
initialViewpoint: viewPoint
}
GraphicsOverlay {
id: graphicsOverlay
}
}
//! [GOSymbols MapView]
// the center of the mapview
ViewpointCenter {
id: viewPoint
center: Point {
x: -2.681572
y: 56.075844
spatialReference: SpatialReference {
wkid: 4326
}
}
targetScale: 288895.277144
}
//! [GOSymbol buoy points]
// buoy location 1 (immutable once created)
Point {
x: -2.712642647560347
y: 56.062812566811544
spatialReference: Factory.SpatialReference.createWgs84()
onComponentCompleted: {
buoyLocArray.push(this);
}
}
// buoy location 2 (immutable once created)
Point {
x: -2.6908416959572303
y: 56.06444173689877
spatialReference: Factory.SpatialReference.createWgs84()
onComponentCompleted: {
buoyLocArray.push(this);
}
}
// buoy location 3 (immutable once created)
Point {
x: -2.6697273884990937
y: 56.064250073402874
spatialReference: Factory.SpatialReference.createWgs84()
onComponentCompleted: {
buoyLocArray.push(this);
}
}
// buoy location 4 (immutable once created)
Point {
x: -2.6395150461199726
y: 56.06127916736989
spatialReference: Factory.SpatialReference.createWgs84()
onComponentCompleted: {
buoyLocArray.push(this);
}
}
//! [GOSymbol buoy points]
//! [GOSymbol buoy symbol]
// buoy symbol
SimpleMarkerSymbol {
id: buoyMarkerSymbol
style: Enums.SimpleMarkerSymbolStyleCircle
color: "red"
size: 10
}
//! [GOSymbol buoy symbol]
//! [GOSymbol text points]
// text location 1: craigleith (immutable once created)
Point {
x: -2.640631
y: 56.078083
spatialReference: Factory.SpatialReference.createWgs84()
onComponentCompleted: {
textLocArray.push(this);
}
}
// text location 2: bass rock (immutable once created)
Point {
x: -2.720324
y: 56.073569
spatialReference: Factory.SpatialReference.createWgs84()
onComponentCompleted: {
textLocArray.push(this);
}
}
//! [GOSymbol text points]
//! [GOSymbol line symbol]
// LineSymbol
SimpleLineSymbol {
id: boatRouteSymbol
style: Enums.SimpleLineSymbolStyleDash
color: Qt.rgba(0, 0, 1, 0.7)
width: 1
antiAlias: true
}
//! [GOSymbol line symbol]
//! [GOSymbol nesting ground]
// polygon for nesting ground
PolygonBuilder {
id: nestingGroundPolygonBuilder
spatialReference: Factory.SpatialReference.createWgs84()
}
// symbol for nesting ground
SimpleFillSymbol {
id: nestingGroundSymbol
style: Enums.SimpleFillSymbolStyleDiagonalCross
color: Qt.rgba(0.0, 0.31, 0.0, 1)
// default property: ouline
SimpleLineSymbol {
style: Enums.SimpleLineSymbolStyleDash
color: Qt.rgba(0.0, 0.0, 0.5, 1)
width: 1
antiAlias: true
}
}
//! [GOSymbol nesting ground]
// add all the graphics to the graphics overlay
// create each graphic type and then add them to the overlay at a time
// alternatively you can create all of them and store in a list and add all of them
// by calling appendAll and pass in the list.
Component.onCompleted: {
// add buoy points
buoyLocArray.forEach(buoyPoint => graphicsOverlay.graphics.append(createGraphic(buoyPoint, buoyMarkerSymbol)));
// add text symbols
for (let i = 0; i < textLocArray.length; i++) {
const textSymbol = ArcGISRuntimeEnvironment.createObject("TextSymbol");
textSymbol.size = 10;
textSymbol.color = Qt.rgba(0.1, 0.4, 0.9, 1);
textSymbol.text = symbolTextArray[i];
if (i === 1) {
textSymbol.horizontalAlignment = Enums.HorizontalAlignmentLeft;
textSymbol.verticalAlignment = Enums.VerticalAlignmentBottom;
} else {
textSymbol.horizontalAlignment = Enums.HorizontalAlignmentRight;
textSymbol.verticalAlignment = Enums.VerticalAlignmentTop;
}
graphicsOverlay.graphics.append(createGraphic(textLocArray[i], textSymbol));
}
// add boat route
graphicsOverlay.graphics.append(createGraphic(createBoatRoute(), boatRouteSymbol));
// add the nesting ground
graphicsOverlay.graphics.append(createGraphic(createNestingGround(), nestingGroundSymbol));
}
//! [GOSymbol createGraphic]
// create and return a graphic
function createGraphic(geometry, symbol) {
const graphic = ArcGISRuntimeEnvironment.createObject("Graphic");
graphic.geometry = geometry;
graphic.symbol = symbol;
return graphic;
}
//! [GOSymbol createGraphic]
//! [GOSymbol createBoatRoute]
// create the boat route
function createBoatRoute() {
// create polyline using json
return ArcGISRuntimeEnvironment.createObject("Polyline", {"json": boatRouteJson});
}
//! [GOSymbol createBoatRoute]
//! [GOSymbol createNestingGround]
// create the nesting ground polygon
function createNestingGround() {
// create the polygon using the builder class
nestingGroundPolygonBuilder.addPointXY(-2.643077012566659, 56.077125346044475);
nestingGroundPolygonBuilder.addPointXY(-2.6428195210159444, 56.07717324600376);
nestingGroundPolygonBuilder.addPointXY(-2.6425405718360033, 56.07774804087097);
nestingGroundPolygonBuilder.addPointXY(-2.6427122328698127, 56.077927662508635);
nestingGroundPolygonBuilder.addPointXY(-2.642454741319098, 56.07829887790651);
nestingGroundPolygonBuilder.addPointXY(-2.641853927700763, 56.078526395253725);
nestingGroundPolygonBuilder.addPointXY(-2.6409741649024867, 56.078801809192434);
nestingGroundPolygonBuilder.addPointXY(-2.6399871139580795, 56.07881378366685);
nestingGroundPolygonBuilder.addPointXY(-2.6394077579689705, 56.07908919555142);
nestingGroundPolygonBuilder.addPointXY(-2.638764029092183, 56.07917301616904);
nestingGroundPolygonBuilder.addPointXY(-2.638485079912242, 56.07896945149566);
nestingGroundPolygonBuilder.addPointXY(-2.638570910429147, 56.078203080726844);
nestingGroundPolygonBuilder.addPointXY(-2.63878548672141, 56.077568418396);
nestingGroundPolygonBuilder.addPointXY(-2.6391931816767085, 56.077197195961084);
nestingGroundPolygonBuilder.addPointXY(-2.6399441986996273, 56.07675411934114);
nestingGroundPolygonBuilder.addPointXY(-2.6406523004640934, 56.076730169108444);
nestingGroundPolygonBuilder.addPointXY(-2.6406737580933193, 56.07632301287509);
nestingGroundPolygonBuilder.addPointXY(-2.6401802326211157, 56.075999679860494);
nestingGroundPolygonBuilder.addPointXY(-2.6402446055087943, 56.075844000034046);
nestingGroundPolygonBuilder.addPointXY(-2.640416266542604, 56.07578412301025);
nestingGroundPolygonBuilder.addPointXY(-2.6408883343855822, 56.075808073830935);
nestingGroundPolygonBuilder.addPointXY(-2.6417680971838577, 56.076239186057734);
nestingGroundPolygonBuilder.addPointXY(-2.642197249768383, 56.076251161328514);
nestingGroundPolygonBuilder.addPointXY(-2.6428409786451708, 56.07661041772168);
nestingGroundPolygonBuilder.addPointXY(-2.643077012566659, 56.077125346044475);
return nestingGroundPolygonBuilder.geometry;
}
//! [GOSymbol createNestingGround]
//! [GOSymbol boatRouteJson]
property var boatRouteJson : {"paths":[[[-2.7184791227926772,56.06147084563517],
[-2.7196807500463924,56.06147084563517],
[-2.722084004553823,56.062141712059706],
[-2.726375530459948,56.06386674355254],
[-2.726890513568683,56.0660708381432],
[-2.7270621746049275,56.06779569383808],
[-2.7255172252787228,56.068753913653914],
[-2.723113970771293,56.069424653352335],
[-2.719165766937657,56.07028701581465],
[-2.713672613777817,56.070574465681325],
[-2.7093810878716917,56.07095772883556],
[-2.7044029178205866,56.07153261642126],
[-2.698223120515766,56.072394931722265],
[-2.6923866452834355,56.07325722773041],
[-2.68672183108735,56.07335303720707],
[-2.6812286779275096,56.07354465544585],
[-2.6764221689126497,56.074215311778964],
[-2.6698990495353394,56.07488595644139],
[-2.6647492184479886,56.075748196715914],
[-2.659427726324393,56.076131408423215],
[-2.654792878345778,56.07622721075461],
[-2.651359657620878,56.076514616319784],
[-2.6477547758597324,56.07708942101955],
[-2.6450081992798125,56.07814320736718],
[-2.6432915889173625,56.08025069360931],
[-2.638656740938747,56.08044227755186],
[-2.636940130576297,56.078813783674946],
[-2.636425147467562,56.07728102068079],
[-2.637798435757522,56.076610417698504],
[-2.638656740938747,56.07507756705851],
[-2.641231656482422,56.07479015077557],
[-2.6427766058086277,56.075748196715914],
[-2.6456948434247924,56.07546078543464],
[-2.647239792750997,56.074598538729404],
[-2.6492997251859376,56.072682365868616],
[-2.6530762679833284,56.0718200569986],
[-2.655479522490758,56.070861913404286],
[-2.6587410821794135,56.07047864929729],
[-2.6633759301580286,56.07028701581465],
[-2.666637489846684,56.07009538137926],
[-2.670070710571584,56.06990374599109],
[-2.6741905754414645,56.069137194910745],
[-2.678310440311345,56.06808316228391],
[-2.682086983108735,56.06789151689155],
[-2.6868934921235956,56.06760404701653],
[-2.6911850180297208,56.06722075051504],
[-2.695133221863356,56.06702910083509],
[-2.698223120515766,56.066837450202335],
[-2.7016563412406667,56.06645414607839],
[-2.7061195281830366,56.0660708381432],
[-2.7100677320166717,56.065591697864576],
[-2.713329291705327,56.06520838135397],
[-2.7167625124302273,56.06453756828941],
[-2.718307461756433,56.06348340989081],
[-2.719165766937657,56.062812566811544],
[-2.7198524110826376,56.06204587471371],
[-2.719165766937657,56.06166252294756],
[-2.718307461756433,56.06147084563517]]],
"spatialReference":{"wkid":4326}}
//! [GOSymbol boatRouteJson]
}