import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

class AutoDrawer extends StatefulWidget {
  final double elevation;
  final Widget child;
  final String? semanticLabel;
  //定义显示宽度百分百比 默认60%
  final double widthPercent;
  final DrawerCallback? callback;
  const AutoDrawer({
    Key? key,
    this.elevation = 16.0,
    required this.child,
    this.semanticLabel,
    this.widthPercent = 0.6,
    this.callback,
  }) : super(key: key);
  @override
  _AutoDrawerState createState() => _AutoDrawerState();
}

class _AutoDrawerState extends State<AutoDrawer> {
  @override
  void initState() {
    if (widget.callback != null) {
      //打开侧边栏 触发
      widget.callback!(true);
    }
    super.initState();
  }

  @override
  void dispose() {
    if (widget.callback != null) {
      // 关闭侧边栏触发
      widget.callback!(false);
    }
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    assert(debugCheckHasMaterialLocalizations(context));
    String? label = widget.semanticLabel ?? MaterialLocalizations.of(context).drawerLabel;
    final double _width = MediaQuery.of(context).size.width * widget.widthPercent;
    return Semantics(
      scopesRoute: true,
      namesRoute: true,
      explicitChildNodes: true,
      label: label,
      child: ConstrainedBox(
        constraints: BoxConstraints.expand(width: _width),
        child: Material(
          elevation: widget.elevation,
          child: widget.child,
        ),
      ),
    );
  }
}