workouttest_app/lib/view/mydevelopment_page.dart

import 'dart:collection';

import 'package:aitrainer_app/model/cache.dart';
import 'package:aitrainer_app/repository/customer_repository.dart';
import 'package:aitrainer_app/repository/exercise_repository.dart';
import 'package:aitrainer_app/widgets/app_bar_common.dart';
import 'package:aitrainer_app/widgets/bottom_nav.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class MyDevelopmentPage extends StatefulWidget {
  @override
  _MyDevelopmentPage createState() => _MyDevelopmentPage();
}

class _MyDevelopmentPage extends State<MyDevelopmentPage> {
  @override
  Widget build(BuildContext context) {
    final ExerciseRepository exerciseRepository = ExerciseRepository();
    final CustomerRepository customerRepository = CustomerRepository();
    final LinkedHashMap args = LinkedHashMap();

    return Scaffold(
      appBar: AppBarCommonNav(),
      body: Container(
        padding: EdgeInsets.all(20),
        decoration: BoxDecoration(
          image: DecorationImage(
            image: AssetImage('asset/image/WT_light_background.png'),
            fit: BoxFit.cover,
            alignment: Alignment.center,
          ),
        ),
        child: CustomScrollView(
          scrollDirection: Axis.vertical,
          slivers:
          [
            SliverGrid(
              delegate: SliverChildListDelegate(
                [
                  FlatButton(
                    padding: EdgeInsets.all(0),
                    textColor: Colors.white,
                    color: Colors.black12,
                    focusColor: Colors.blueAccent,
                    onPressed: () =>
                    {
                      args['exerciseRepository'] = exerciseRepository,
                      args['customerRepository'] = customerRepository,
                      args['customerId'] = Cache().userLoggedIn.customerId,
                      Navigator.of(context).pushNamed('exerciseLogPage',
                        arguments: args)
                    },
                    child: Text("My Exercise Logs",
                      style: TextStyle(fontSize: 18),)
                  ),
                  Stack(
                    fit: StackFit.passthrough,
                    overflow: Overflow.clip,
                    alignment: Alignment.topLeft,
                    children: [
                      Image.asset('asset/image/lock.png',
                        height: 40,
                        width: 40,
                      ),
                      FlatButton(
                        padding: EdgeInsets.all(20),
                        textColor: Colors.white,
                        color: Colors.black12,
                        focusColor: Colors.blueAccent,
                        onPressed: () =>
                        {
                        },
                        child: Text("My Whole Body Development",
                          style: TextStyle(fontSize: 18),)
                      ),

                    ],
                  ),

                  Stack(
                    fit: StackFit.passthrough,
                    overflow: Overflow.clip,
                    children: [
                      Image.asset('asset/image/lock.png',
                        height: 40,
                        width: 40,
                      ),
                      FlatButton(
                        padding: EdgeInsets.all(20),
                        textColor: Colors.white,
                        color: Colors.black12,
                        focusColor: Colors.blueAccent,
                        onPressed: () =>
                        {
                        },
                        child: Text("Development Of Muscles",
                          style: TextStyle(fontSize: 18),)
                      ),

                    ]
                  ),
                  Stack(
                    fit: StackFit.passthrough,

                    overflow: Overflow.clip,
                    children: [
                      Image.asset('asset/image/lock.png',
                        height: 40,
                        width: 40,
                      ),
                      FlatButton(
                        padding: EdgeInsets.all(20),
                        textColor: Colors.white,
                        color: Colors.black12,
                        focusColor: Colors.blueAccent,
                        onPressed: () =>
                        {
                        },
                        child: Text("Predictions",
                          style: TextStyle(fontSize: 18),)
                      ),
                    ]
                  ),
                  hiddenWidget(customerRepository, exerciseRepository),
                ]
              ),
              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                crossAxisCount: 2,
                mainAxisSpacing: 20.0,
                crossAxisSpacing: 20.0,
                childAspectRatio: 1.2,
              ),
            )
          ]
        )
      ),
      bottomNavigationBar: BottomNavigator(bottomNavIndex: 1));
  }

  Widget hiddenWidget(CustomerRepository customerRepository, ExerciseRepository exerciseRepository) {
    final LinkedHashMap args = LinkedHashMap();
    if (Cache().getTrainee() != null) {
      return FlatButton(
        padding: EdgeInsets.all(20),
        textColor: Colors.white,
        color: Colors.black12,
        focusColor: Colors.blueAccent,
        onPressed: () =>
        {
          args['exerciseRepository'] = exerciseRepository,
          args['customerRepository'] = customerRepository,
          args['customerId'] = Cache().getTrainee().customerId,
          Navigator.of(context).pushNamed('exerciseLogPage',
            arguments: args)
        },
        child: Text("My Trainee's Exercise Logs",
          style: TextStyle(fontSize: 18),)
      );
    } else {
      return Container();
    }
  }

}