70 lines
1.9 KiB
Dart
70 lines
1.9 KiB
Dart
import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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class AutoDrawer extends StatefulWidget {
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final double elevation;
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final Widget child;
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final String? semanticLabel;
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//定义显示宽度百分百比 默认60%
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final double widthPercent;
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final DrawerCallback? callback;
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const AutoDrawer({
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Key? key,
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this.elevation = 16.0,
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required this.child,
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this.semanticLabel,
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this.widthPercent = 0.6,
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this.callback,
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}) :super(key: key);
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@override
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_AutoDrawerState createState() => _AutoDrawerState();
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}
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class _AutoDrawerState extends State<AutoDrawer> {
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@override
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void initState() {
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if(widget.callback!=null){
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//打开侧边栏 触发
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widget.callback!(true);
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}
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super.initState();
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}
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@override
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void dispose() {
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if(widget.callback!=null){
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// 关闭侧边栏触发
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widget.callback!(false);
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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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assert(debugCheckHasMaterialLocalizations(context));
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String? label = widget.semanticLabel;
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switch (defaultTargetPlatform) {
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case TargetPlatform.iOS:
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label = widget.semanticLabel;
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break;
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case TargetPlatform.android:
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case TargetPlatform.fuchsia:
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label = widget.semanticLabel ?? MaterialLocalizations.of(context)?.drawerLabel;
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}
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final double _width = MediaQuery.of(context).size.width * widget.widthPercent;
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return Semantics(
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scopesRoute: true,
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namesRoute: true,
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explicitChildNodes: true,
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label: label,
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child: ConstrainedBox(
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constraints: BoxConstraints.expand(width: _width),
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child: Material(
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elevation: widget.elevation,
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child: widget.child,
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),
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),
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);
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}
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} |