95 lines
2.6 KiB
Dart
95 lines
2.6 KiB
Dart
// Copyright 2023-2024 kuloud
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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part of amap_map;
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/// 加载器，在[AMapWidget]的生命周期上绑定拓展
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class AMapLoader extends StatefulWidget {
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const AMapLoader(
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{super.key, required this.mapView, required this.extensions});
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final Widget mapView;
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final List<AMapExtension> extensions;
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@override
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State<AMapLoader> createState() => _AMapLoaderState();
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static void prepare() {
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// TODO Loader 初始化静态方法，在initState时做些逻辑
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}
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/// 传递构建视图，拓展按需进行包装和挂载定制视图
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Widget buildFromExtension(AMapContext aMapContext) {
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Widget child = mapView;
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for (var e in extensions) {
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child = e.build(aMapContext, child);
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}
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return child;
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}
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/// [didChangeDependencies] 状态更新时，挨个遍历进行拓展的更新操作
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void prepareFromExtension(AMapContext aMapContext) {
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for (var e in extensions) {
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e.prepare(aMapContext);
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}
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}
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/// [didChangeDependencies] 状态更新时，挨个遍历进行拓展的更新操作
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void updateFromExtension(AMapContext aMapContext) {
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for (var e in extensions) {
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e.update(aMapContext);
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}
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// Future.forEach(extensions, (ext) => ext.update(aMapContext));
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}
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}
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class _AMapLoaderState extends State<AMapLoader> {
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@override
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void didChangeDependencies() {
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final aMapContext = AMapContext(
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buildContext: context,
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currentStep: CurrentStep.preparing,
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loader: widget);
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widget.prepareFromExtension(aMapContext);
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super.didChangeDependencies();
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}
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@override
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void didUpdateWidget(covariant AMapLoader oldWidget) {
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final aMapContext = AMapContext(
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buildContext: context,
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currentStep: CurrentStep.updating,
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loader: widget);
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widget.updateFromExtension(aMapContext);
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super.didUpdateWidget(oldWidget);
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}
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@override
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void dispose() {
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for (var e in widget.extensions) {
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e.onDispose();
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}
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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// Set the extension context for this node.
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final aMapContext = AMapContext(
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buildContext: context,
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currentStep: CurrentStep.building,
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loader: widget);
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return widget.buildFromExtension(aMapContext);
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}
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}
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