132 lines
3.7 KiB
Dart
132 lines
3.7 KiB
Dart
import 'package:amap_map/amap_map.dart';
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import 'package:flutter/material.dart';
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class MinMaxZoomDemoPage extends StatefulWidget {
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MinMaxZoomDemoPage({super.key});
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@override
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State<MinMaxZoomDemoPage> createState() => _BodyState();
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}
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class _BodyState extends State<MinMaxZoomDemoPage> {
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final double _minZoom = 10;
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final double _maxZoom = 15;
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String? _currentZoom;
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late AMapController _mapController;
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@override
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Widget build(BuildContext context) {
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final AMapWidget amap = AMapWidget(
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onMapCreated: _onMapCreated,
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onCameraMove: _onCameraMove,
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onCameraMoveEnd: _onCameraMoveEnd,
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minMaxZoomPreference: MinMaxZoomPreference(_minZoom, _maxZoom),
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);
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return ConstrainedBox(
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constraints: BoxConstraints.expand(),
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child: Stack(
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children: [
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Container(
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height: MediaQuery.of(context).size.height,
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width: MediaQuery.of(context).size.width,
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child: amap,
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),
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Positioned(
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top: 5,
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left: 15,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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mainAxisSize: MainAxisSize.min,
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children: [
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Container(
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width: MediaQuery.of(context).size.width,
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color: Colors.grey,
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padding: EdgeInsets.all(5),
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alignment: Alignment.centerLeft,
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child: Text(
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'当前限制的最小最大缩放级别是：[$_minZoom, $_maxZoom]',
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style: TextStyle(color: Colors.blue),
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),
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),
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_currentZoom != null
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? Container(
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width: MediaQuery.of(context).size.width,
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color: Colors.grey,
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padding: EdgeInsets.all(5),
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alignment: Alignment.centerLeft,
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child: Text(
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_currentZoom!,
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style: TextStyle(color: Colors.white),
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))
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: SizedBox(),
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],
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),
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),
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Positioned(
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right: 5,
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bottom: 5,
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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InkResponse(
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child: Container(
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child: Icon(
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Icons.add,
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color: Colors.white,
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),
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width: 40,
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height: 40,
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color: Colors.blue,
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),
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onTap: _zoomIn,
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),
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InkResponse(
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child: Container(
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child: Icon(
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Icons.remove,
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color: Colors.white,
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),
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color: Colors.blue,
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width: 40,
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height: 40,
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),
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onTap: _zoomOut,
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),
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],
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),
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),
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],
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),
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);
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}
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void _onMapCreated(AMapController controller) {
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_mapController = controller;
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}
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//移动视野
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void _onCameraMove(CameraPosition cameraPosition) {}
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//移动地图结束
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void _onCameraMoveEnd(CameraPosition cameraPosition) {
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setState(() {
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_currentZoom = '当前缩放级别：${cameraPosition.zoom}';
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});
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}
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//级别加1
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void _zoomIn() {
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_mapController.moveCamera(
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CameraUpdate.zoomIn(),
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animated: true,
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);
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}
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//级别减1
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void _zoomOut() {
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_mapController.moveCamera(
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CameraUpdate.zoomOut(),
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animated: true,
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);
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}
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}
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