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import 'dart:io'; | ||
import 'dart:math'; | ||
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import 'package:flutter/material.dart'; | ||
import 'package:flutter/widgets.dart'; | ||
import 'package:mapbox_gl/mapbox_gl.dart'; | ||
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import 'main.dart'; | ||
import 'page.dart'; | ||
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const RANDOM_MARKER_NUM = 100; | ||
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class CustomMarker extends ExamplePage { | ||
CustomMarker() : super(const Icon(Icons.place), 'Custom marker'); | ||
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@override | ||
Widget build(BuildContext context) { | ||
return FullMap(); | ||
} | ||
} | ||
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class FullMap extends StatefulWidget { | ||
const FullMap(); | ||
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@override | ||
State createState() => FullMapState(); | ||
} | ||
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abstract class PositionChangeListener { | ||
LatLng onPositionWillChange(); | ||
void onPositionChanged(Point point); | ||
} | ||
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class FullMapState extends State<FullMap> { | ||
final Random _rnd = new Random(); | ||
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MapboxMapController _mapController; | ||
List<Marker> _markers = []; | ||
List<PositionChangeListener> _positionChangeListeners = []; | ||
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void _addPositionChangeListener(PositionChangeListener listener) { | ||
_positionChangeListeners.add(listener); | ||
} | ||
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void _onMapCreated(MapboxMapController controller) { | ||
_mapController = controller; | ||
controller.addListener(() { | ||
if (controller.isCameraMoving) { | ||
_updateMarkerPosition(); | ||
} | ||
}); | ||
} | ||
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void _onStyleLoadedCallback() { | ||
print('onStyleLoadedCallback'); | ||
} | ||
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void _onMapLongClickCallback(Point<double> point, LatLng coordinates) { | ||
_addMarker(point, coordinates); | ||
} | ||
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void _onCameraIdleCallback() { | ||
_updateMarkerPosition(); | ||
} | ||
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void _updateMarkerPosition() { | ||
var param = <LatLng>[]; | ||
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for (final listner in _positionChangeListeners) { | ||
param.add(listner.onPositionWillChange()); | ||
} | ||
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_mapController.toScreenLocationBatch(param).then((points){ | ||
for (final listner in _positionChangeListeners) { | ||
param.add(listner.onPositionWillChange()); | ||
} | ||
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_positionChangeListeners.asMap().forEach((i, value){ | ||
final point = Point(points[i].x, points[i].y); | ||
_positionChangeListeners[i].onPositionChanged(point); | ||
}); | ||
}); | ||
} | ||
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void _addMarker(Point<double> point, LatLng coordinates) { | ||
setState(() { | ||
_markers.add(Marker(_rnd.nextInt(100000).toString(), coordinates, point, _addPositionChangeListener)); | ||
}); | ||
} | ||
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@override | ||
Widget build(BuildContext context) { | ||
return new Scaffold( | ||
body: Stack( | ||
children: [ | ||
MapboxMap( | ||
accessToken: MapsDemo.ACCESS_TOKEN, | ||
trackCameraPosition: true, | ||
onMapCreated: _onMapCreated, | ||
onMapLongClick: _onMapLongClickCallback, | ||
onCameraIdle: _onCameraIdleCallback, | ||
onStyleLoadedCallback: _onStyleLoadedCallback, | ||
initialCameraPosition: const CameraPosition(target: LatLng(35.0, 135.0), zoom: 5), | ||
), | ||
IgnorePointer( | ||
ignoring: true, | ||
child: | ||
Stack( | ||
children: _markers, | ||
) | ||
) | ||
] | ||
), | ||
floatingActionButton: FloatingActionButton( | ||
onPressed: (){ | ||
//_measurePerformance(); | ||
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// Generate random markers | ||
var param = <LatLng>[]; | ||
for (var i = 0; i < RANDOM_MARKER_NUM; i++) { | ||
final lat = _rnd.nextDouble() * 20 + 30; | ||
final lng = _rnd.nextDouble() * 20 + 125; | ||
param.add(LatLng(lat, lng)); | ||
} | ||
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_mapController.toScreenLocationBatch(param).then((value) { | ||
for (var i = 0; i < RANDOM_MARKER_NUM; i++) { | ||
var point = Point<double>(value[i].x, value[i].y); | ||
_addMarker(point, param[i]); | ||
} | ||
}); | ||
}, | ||
child: Icon(Icons.add), | ||
), | ||
); | ||
} | ||
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// ignore: unused_element | ||
void _measurePerformance() { | ||
final trial = 10; | ||
final batches = [500, 1000, 1500, 2000, 2500, 3000]; | ||
var results = Map<int, List<double>>(); | ||
for (final batch in batches) { | ||
results[batch] = [0.0, 0.0]; | ||
} | ||
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_mapController.toScreenLocation(LatLng(0, 0)); | ||
Stopwatch sw = Stopwatch(); | ||
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for (final batch in batches) { | ||
// | ||
// primitive | ||
// | ||
for (var i = 0; i < trial; i++) { | ||
sw.start(); | ||
var list = <Future<Point<num>>>[]; | ||
for (var j = 0; j < batch; j++) { | ||
var p = _mapController.toScreenLocation(LatLng(j.toDouble() % 80, j.toDouble() % 300)); | ||
list.add(p); | ||
} | ||
Future.wait(list); | ||
sw.stop(); | ||
results[batch][0] += sw.elapsedMilliseconds; | ||
sw.reset(); | ||
} | ||
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// | ||
// batch | ||
// | ||
for (var i = 0; i < trial; i++) { | ||
sw.start(); | ||
var param = <LatLng>[]; | ||
for (var j = 0; j < batch; j++) { | ||
param.add(LatLng(j.toDouble() % 80, j.toDouble() % 300)); | ||
} | ||
Future.wait([_mapController.toScreenLocationBatch(param)]); | ||
sw.stop(); | ||
results[batch][1] += sw.elapsedMilliseconds; | ||
sw.reset(); | ||
} | ||
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print('batch=$batch,primitive=${results[batch][0] / trial}ms, batch=${results[batch][1] / trial}ms'); | ||
} | ||
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} | ||
} | ||
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class Marker extends StatefulWidget { | ||
final Point _initialPosition; | ||
final LatLng _coordinate; | ||
final void Function(PositionChangeListener) _addPositionChangeListener; | ||
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Marker(String key, this._coordinate, this._initialPosition, this._addPositionChangeListener) : super(key: Key(key)); | ||
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@override | ||
State<StatefulWidget> createState() { | ||
final state = _MarkerState(_coordinate, _initialPosition); | ||
_addPositionChangeListener(state); | ||
return state; | ||
} | ||
} | ||
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class _MarkerState extends State with TickerProviderStateMixin, PositionChangeListener { | ||
final _iconSize = 20.0; | ||
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final LatLng _coordinate; | ||
Point _position; | ||
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AnimationController _controller; | ||
Animation<double> _animation; | ||
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_MarkerState(this._coordinate, this._position); | ||
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@override | ||
void initState() { | ||
super.initState(); | ||
_controller = AnimationController( | ||
duration: const Duration(seconds: 2), | ||
vsync: this, | ||
)..repeat(reverse: true); | ||
_animation = CurvedAnimation( | ||
parent: _controller, | ||
curve: Curves.elasticOut, | ||
); | ||
} | ||
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@override | ||
void dispose() { | ||
_controller.dispose(); | ||
super.dispose(); | ||
} | ||
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@override | ||
Widget build(BuildContext context) { | ||
var ratio = 1.0; | ||
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try { | ||
ratio = Platform.isIOS ? 1.0 : MediaQuery.of(context).devicePixelRatio; //TODO: iOS returns lp | ||
} catch (UnsupportedError) { | ||
//web does not support Platform._operatingSystem | ||
}; // ignore: empty_statements | ||
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return | ||
Positioned( | ||
left: _position.x / ratio - _iconSize / 2, | ||
top: _position.y / ratio - _iconSize / 2, | ||
child: | ||
RotationTransition( | ||
turns: _animation, | ||
child: | ||
Image.asset('assets/symbols/2.0x/custom-icon.png', height: _iconSize)) | ||
); | ||
} | ||
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@override | ||
void onPositionChanged(Point<num> point) { | ||
setState(() { | ||
_position = point; | ||
}); | ||
} | ||
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@override | ||
LatLng onPositionWillChange() { | ||
return _coordinate; | ||
} | ||
} | ||
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