passo_mobile_app/lib/screens/passo/Land/add_land.dart

import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_form_builder/flutter_form_builder.dart';

import 'package:im_stepper/stepper.dart';
import 'package:unit2/screens/passo/Land/add_land/land_appraisal.dart';
import 'package:unit2/screens/passo/Land/add_land/location_and_boundaries.dart';
import 'package:unit2/screens/passo/Land/add_land/other_improvements.dart';
import 'package:unit2/screens/passo/Land/add_land/property_assessment.dart';
import 'package:unit2/screens/passo/Land/add_land/property_assessment_cont.dart';
import 'package:unit2/screens/passo/Land/add_land/property_owner_info.dart';
import 'package:unit2/screens/passo/Land/add_land/value_adjustments.dart';
import 'package:unit2/theme-data.dart/colors.dart';
import 'package:unit2/widgets/passo/custom_formBuilder_fields.dart';

GlobalKey<FormBuilderState> landKey = GlobalKey<FormBuilderState>();

class AddLand extends StatefulWidget {
  @override
  _AddLand createState() => _AddLand();
}

class _AddLand extends State<AddLand> {
  // THE FOLLOWING TWO VARIABLES ARE REQUIRED TO CONTROL THE STEPPER.
  int activeStep = 0; // Initial step set to 5.

  int upperBound = 6; // upperBound MUST BE total number of icons minus 1.

  void PrevBtn() {
    setState(() {
      activeStep--;
    });
  }

  void NextBtn() {
    setState(() {
      activeStep++;
    });
  }

  void onSAveAll() {
    return Navigator.of(context).pop();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        centerTitle: true,
        backgroundColor: primary,
        title: Text('Land FAAS'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          children: [
            NumberStepper(
              numbers: [1, 2, 3, 4, 5, 6, 7],
              activeStepColor: primary,
              numberStyle: TextStyle(color: Colors.white),
              lineColor: primary,
              // activeStep property set to activeStep variable defined above.
              activeStep: activeStep,
              activeStepBorderColor: Colors.white,
              activeStepBorderWidth: 1,
              // This ensures step-tapping updates the activeStep.
              onStepReached: (index) {
                setState(() {
                  activeStep = index;
                });
              },
            ),
            Expanded(
              child: FormBuilder(
                key: landKey,

                // enabled: false,
                onChanged: () {
                  landKey.currentState?.save();

                  print(landKey.currentState?.value.toString());
                },
                autovalidateMode: AutovalidateMode.disabled,
                skipDisabled: true,
                child: Container(
                  child: content(PrevBtn, NextBtn, onSAveAll),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  /// Returns the next button.

  // Returns the content widget based on the activeStep.
  Widget content(PrevBtn, NextBtn, onSAveAll) {
    switch (activeStep) {
      case 0:
        return LandPropertyOwnerInfo(NextBtn);
      case 1:
        return LandLocationAndBoundaries(PrevBtn, NextBtn);
      case 2:
        return LandAppraisal(PrevBtn, NextBtn);
      case 3:
        return OtherImprovementPage(PrevBtn, NextBtn);
      case 4:
        return ValueAdjustmentPage(PrevBtn, NextBtn);
      case 5:
        return LandPropertyAssessmentPage(PrevBtn, NextBtn);
      case 6:
        return LandSignatories(onSAveAll);

      default:
        return LandPropertyOwnerInfo(NextBtn);
    }
  }
}