lift-app/lib/widgets/app_city_search_bar.dart

import 'package:flustars/flustars.dart' as FlutterStars;
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:liftmanager/common/common.dart';
import 'package:liftmanager/internal/account/account_router.dart';
import 'package:liftmanager/internal/search/search_router.dart';
import 'package:liftmanager/internal/wode/wode_router.dart';
import 'package:liftmanager/res/iconfont.dart';
import 'package:liftmanager/routers/fluro_navigator.dart';
import 'package:liftmanager/utils/toast.dart';

/// 自定义AppBar
class AppCitySearchAppBar extends StatelessWidget
    implements PreferredSizeWidget {
  const AppCitySearchAppBar({
    Key key,
    this.city: "",
    this.centerTitle: "",
    this.actionName: "",
    this.actionIcon: "",
    this.backImg: "assets/images/icon_back.png",
    this.onPressed,
    this.isBack: true,
    this.display: true,
  }) : super(key: key);

  final String city;
  final String centerTitle;
  final String backImg;
  final String actionName;
  final String actionIcon;
  final VoidCallback onPressed;
  final bool isBack;
  final bool display;

  @override
  Widget build(BuildContext context) {
    double width = MediaQuery.of(context).size.width;
    return AnnotatedRegion<SystemUiOverlayStyle>(
      value: SystemUiOverlayStyle.light,
      child: Container(
        decoration: BoxDecoration(
          gradient: const LinearGradient(
              colors: [Color(0xFF00ACFF), Color(0xFF5888FF)]),
        ),
        child: SafeArea(
          child: Stack(
            alignment: Alignment.centerLeft,
            children: <Widget>[
              Row(children: [
                SizedBox(
                  width: 10,
                ),
                Icon(
                  Iconfont.dingwei,
                  color: Colors.white,
                  size: 18,
                ),
                Text(city,
                    overflow: TextOverflow.ellipsis,
                    style: TextStyle(
                        fontSize: 12, color: Colors.white)),
              ]),
              GestureDetector(
                  onTap: () {
                    if (FlutterStars.SpUtil.getString(Constant.userId) ==
                        "-1") {
                      toasts("请登录");
                      NavigatorUtils.push(context, AccountRouter.loginPage,
                          clearStack: true);
                    } else {
                      NavigatorUtils.push(context, SearchRouter.searchPage);
                    }
                  },
                  child: Container(
                    height: 35,
                    width: width * 0.65,
                    margin: const EdgeInsets.only(left: 85.0, right: 15),
                    decoration: BoxDecoration(
                        color: Color(0x33FFFFFF),
                        borderRadius: BorderRadius.circular(17.5)),
                    child: Row(
                      crossAxisAlignment: CrossAxisAlignment.center,
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: <Widget>[
                        // SizedBox(
                        //   width: 16,
                        // ),
                        Icon(
                          Iconfont.sousuo,
                          color: Colors.white,
                          size: 16,
                        ),
                        SizedBox(
                          width: 10,
                        ),
                        Text(
                          "输入搜索内容",
                          style: TextStyle(color: Colors.white, fontSize: 14),
                        )
                      ],
                    ),
                  )),
              GestureDetector(
                onTap: () {
                  if (FlutterStars.SpUtil.getString(Constant.userId) == "-1") {
                    toasts("请登录");
                    NavigatorUtils.push(context, AccountRouter.loginPage,
                        clearStack: true);
                  } else {
                    NavigatorUtils.push(context, WodeRouter.messageCenter);
                  }
                },
                child: Container(
                    alignment: Alignment.centerRight,
                    margin: EdgeInsets.only(right: 10),
                    child: Stack(
                      children: <Widget>[
                        Icon(
                          Iconfont.xiaoxi,
                          color: Colors.white,
                          size: 18,
                        ),
                        Positioned(
                            child: (RedCirle(display: display)),
                            top: 0,
                            right: 0),
                      ],
                    )),
              ),
            ],
          ),
        ),
//        ),
      ),
    );
  }

  @override
  Size get preferredSize => Size.fromHeight(48.0);
}

class RedCirle extends StatelessWidget {
  final bool display;

  const RedCirle({
    Key key,
    this.display: true,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Offstage(
        offstage: display,
        child: Container(
          width: 6,
          height: 6,
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(3.0),
            color: Colors.red,
          ),
        ));
  }
}