workouttest_app/lib/view/customer_goal_page.dart

import 'package:aitrainer_app/localization/app_localization.dart';
import 'package:aitrainer_app/viewmodel/customer_changing_view_model.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

// ignore: must_be_immutable
class CustomerGoalPage extends StatefulWidget{
  _CustomerGoalPageState _state;

  _CustomerGoalPageState createState() {
    _state = _CustomerGoalPageState();
    return _state;
  }
}

class GoalsItem{
  static String muscle = "gain_muscle";
  static String weight = "weight_loss";
}

class _CustomerGoalPageState extends State<CustomerGoalPage> {
  String selected;

  initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    final double cWidth = MediaQuery.of(context).size.width*0.75;
    final CustomerChangingViewModel changingViewModel = ModalRoute.of(context).settings.arguments;
    selected = changingViewModel.customer.goal;
    return Scaffold(
        appBar: AppBar(
          title: Row(
            mainAxisAlignment: MainAxisAlignment.end,
            children: <Widget>[

              Image.asset(
                'asset/image/WT_long_logo.png',
                fit: BoxFit.cover,
                height: 65.0,
              ),
            ],
          ),
          backgroundColor: Colors.transparent,
          ),
          body: Container(
            decoration: BoxDecoration(
              image: DecorationImage(
                image: AssetImage('asset/image/WT_light_background.png'),
                fit: BoxFit.cover,
                alignment: Alignment.center,
              ),
            ),
            child: SingleChildScrollView(
                child: Center(
                  child: Column(
                  children: [
                    Divider(),
                    InkWell(
                      child: Text(AppLocalizations.of(context).translate("Set Your Goals"),
                        style: TextStyle(color: Colors.orange,
                            fontSize: 50, fontFamily: 'Arial',
                            fontWeight: FontWeight.w900 ),),
                      highlightColor: Colors.white,
                    ),

                    Stack(
                        alignment: Alignment.bottomLeft,
                        overflow: Overflow.visible,
                        children: [
                          FlatButton(
                            child: Image.asset("asset/image/WT_gain_muscle.png", height: 180,),
                            padding: EdgeInsets.all(0.0),
                            shape: getShape(changingViewModel, GoalsItem.muscle ),
                            onPressed:() =>
                            {
                              print("gain muscle"),
                              setState((){
                                selected = GoalsItem.muscle;
                                changingViewModel.customer.setGoal(GoalsItem.muscle);
                              }),

                            }
                        ),
                          InkWell(
                            child: Text(AppLocalizations.of(context).translate("Gain Muscle"),
                              style: TextStyle(color: Colors.white,
                                  fontSize: 32, fontFamily: 'Arial',
                                  fontWeight: FontWeight.w900 ),),
                            highlightColor: Colors.white,
                          )
                      ]
                    ),
                    Divider(),
                    Stack(
                        alignment: Alignment.bottomLeft,
                        overflow: Overflow.visible,
                        children: [
                          FlatButton(
                              child: Image.asset("asset/image/WT_weight_loss.png", height: 180,),
                              padding: EdgeInsets.all(0.0),
                              shape: getShape(changingViewModel, GoalsItem.weight ),
                              onPressed:() =>
                              {
                                print("weight_loss"),
                                setState((){
                                  selected = GoalsItem.weight;
                                  changingViewModel.customer.setGoal(GoalsItem.weight);
                                }),

                              }
                          ),
                          InkWell(
                            child: Text(AppLocalizations.of(context).translate("Loose Weight"),
                              style: TextStyle(color: Colors.white,
                                  fontSize: 32, fontFamily: 'Arial',
                                  fontWeight: FontWeight.w900 ),),
                            highlightColor: Colors.white,
                          )
                        ]
                    ),
                    Divider(),
                    RaisedButton(

                      color: Colors.orange,
                      textColor: Colors.white,
                      child: InkWell(
                          child: Text(AppLocalizations.of(context).translate("Next"))),
                      onPressed: () => {
                        changingViewModel.saveCustomer(),
                        Navigator.of(context).pop(),
                        Navigator.of(context).pushNamed("customerFitnessPage", arguments: changingViewModel)
                      },
                    )
                  ],
                ),
              )
            )
          ),
    );
  }

  dynamic getShape( CustomerChangingViewModel changingViewModel, String goal ) {
    String selectedGoal = changingViewModel.customer.goal;
    dynamic returnCode = ( selectedGoal == goal ) ?
      RoundedRectangleBorder(
        side: BorderSide(width: 4, color: Colors.red),
      )
      : null;
    //return
    return returnCode;
  }

}