Add interactions to predefined featuresets
The Mapbox Standard Style exposes three featuresets for buildings, place labels, and points of interest (POIs).
This example shows how to use addInteraction with a featureset to set the highlight and select feature states for these predefined featuresets, causing the interacted feature to change its visual appearance.
addInteraction is also used to add a long tap listener to the map itself, which is used to remove the feature states and reset the visual appearance of the map.
standard_style_interactions_example.dart
import 'dart:developer';
import 'package:flutter/material.dart';
import 'package:mapbox_maps_flutter/mapbox_maps_flutter.dart';
import 'example.dart';
class StandardStyleInteractionsExample extends StatefulWidget
implements Example {
final Widget leading = const Icon(Icons.touch_app);
final String title = 'Standard Style Interactions';
final String? subtitle = 'Showcase of Standard Style interactions';
const StandardStyleInteractionsExample({super.key});
State<StatefulWidget> createState() => StandardStyleInteractionsState();
}
class StandardStyleInteractionsState
extends State<StandardStyleInteractionsExample> {
StandardStyleInteractionsState();
MapboxMap? mapboxMap;
/// Default style import config properties for Mapbox Standard style.
String lightPreset = 'day';
String theme = 'default';
String buildingHighlightColor = 'hsl(214, 94%, 59%)';
_onMapCreated(MapboxMap mapboxMap) {
this.mapboxMap = mapboxMap;
mapboxMap.style;
/// When a POI feature in the Standard POI featureset is tapped hide the POI
var tapInteractionPOI = TapInteraction(StandardPOIs(), (feature, _) {
mapboxMap.setFeatureStateForFeaturesetFeature(
feature, StandardPOIsState(hide: true));
log("POI feature name: ${feature.name}");
/// Not stopping propagation means that the tap event will be propagated to other interactions.
}, radius: 10, stopPropagation: false);
mapboxMap.addInteraction(tapInteractionPOI,
interactionID: "tap_interaction_poi");
/// When a building in the Standard Buildings featureset is tapped, set that building as highlighted to color it.
var tapInteractionBuildings =
TapInteraction(StandardBuildings(), (feature, _) {
mapboxMap.setFeatureStateForFeaturesetFeature(
feature, StandardBuildingState(highlight: true));
log("Building group: ${feature.group}");
});
mapboxMap.addInteraction(tapInteractionBuildings);
/// When a place label in the Standard Place Labels featureset is tapped, set that place label as selected.
var tapInteractionPlaceLabel =
TapInteraction(StandardPlaceLabels(), (feature, _) {
mapboxMap.setFeatureStateForFeaturesetFeature(
feature, StandardPlaceLabelsState(select: true));
log("Place label: ${feature.name}");
});
mapboxMap.addInteraction(tapInteractionPlaceLabel);
// When the map is long-tapped print the screen coordinates of the tap
// and reset the state of all features in the Standard POIs, Buildings, and Place Labels featuresets.
var longTapInteraction = LongTapInteraction.onMap((context) {
log("Long tap at: ${context.touchPosition.x}, ${context.touchPosition.y}");
mapboxMap.resetFeatureStatesForFeatureset(StandardPOIs());
mapboxMap.resetFeatureStatesForFeatureset(StandardBuildings());
mapboxMap.resetFeatureStatesForFeatureset(StandardPlaceLabels());
});
mapboxMap.addInteraction(longTapInteraction);
}
Widget _buildDebugPanel() {
return Container(
padding: EdgeInsets.all(10),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(10),
boxShadow: [
BoxShadow(
color: Colors.black,
offset: Offset(0, 2),
blurRadius: 4,
),
],
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Building Color'),
DropdownButton<String>(
value: buildingHighlightColor,
items: [
DropdownMenuItem(
value: 'hsl(214, 94%, 59%)', child: Text('Blue')),
DropdownMenuItem(value: 'yellow', child: Text('Yellow')),
DropdownMenuItem(value: 'red', child: Text('Red')),
],
onChanged: (value) {
setState(() {
buildingHighlightColor = value!;
_updateMapStyle();
});
},
),
SizedBox(height: 10),
Text('Light'),
DropdownButton<String>(
value: lightPreset,
items: [
DropdownMenuItem(value: 'dawn', child: Text('Dawn')),
DropdownMenuItem(value: 'day', child: Text('Day')),
DropdownMenuItem(value: 'dusk', child: Text('Dusk')),
DropdownMenuItem(value: 'night', child: Text('Night')),
],
onChanged: (value) {
setState(() {
lightPreset = value!;
_updateMapStyle();
});
},
),
SizedBox(height: 10),
Text('Theme'),
DropdownButton<String>(
value: theme,
items: [
DropdownMenuItem(value: 'default', child: Text('Default')),
DropdownMenuItem(value: 'faded', child: Text('Faded')),
DropdownMenuItem(value: 'monochrome', child: Text('Monochrome')),
],
onChanged: (value) {
setState(() {
theme = value!;
_updateMapStyle();
});
},
),
],
),
);
}
Widget build(BuildContext context) {
return Scaffold(
body: Stack(children: [
MapWidget(
key: ValueKey("mapWidget"),
cameraOptions: CameraOptions(
center: Point(coordinates: Position(24.9453, 60.1718)),
bearing: 49.92,
zoom: 16.35,
pitch: 40),
/// NOT FOR PRODUCTION USE. An experimental version of the Mapbox Standard style.
styleUri: MapboxStyles.STANDARD_EXPERIMENTAL,
textureView: true,
onMapCreated: _onMapCreated,
),
Positioned(
bottom: 10,
left: 10,
right: 10,
child: _buildDebugPanel(),
),
]));
}
void _updateMapStyle() {
// Update the map style's config properties based on the selected options
var configs = {
"lightPreset": lightPreset,
"theme": theme,
"buildingHighlightColor": buildingHighlightColor,
};
mapboxMap?.style.setStyleImportConfigProperties("basemap", configs);
}
}
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