dropdown

gistfile1.txt

  void _business() async {
    _locationBloc.add(GetState()); //get states here
    List<StateModel> states = [];
    List<LGAModel> lgas = [];
    showGeneralDialog(
        barrierDismissible: false,
        barrierColor: Colors.grey,
        transitionDuration: Duration(milliseconds: 200),
        context: context,
        pageBuilder: (context, Animation animation, Animation secondAnimation) =>
            StatefulBuilder(builder: (context, setState) {
              return Scaffold(
                  body: BlocListener(
                    cubit: _locationBloc,
                    listener: (context, state) {
                      if (state is LocationInitial) {}

                      if (state is LocationSuccess) {
                        setState(() {
                          states = state.states;
                        });
                      }

                      if (state is LocationLGASuccess) {
                        setState(() {
                          lgas = state.lgas;
                        });
                      }

                      if (state is LocationFailure) {}
                    },
                    child: Container(
                      width: MediaQuery.of(context).size.width,
                      height: MediaQuery.of(context).size.height,
                      color: BMColors.blue,
                      child: SingleChildScrollView(
                        child: ConstrainedBox(
                          constraints: BoxConstraints(maxHeight: MediaQuery.of(context).size.height),
                          child: Container(
                            margin: EdgeInsets.all(20),
                            child: Column(crossAxisAlignment: CrossAxisAlignment.start,
                              children: <Widget>[
                                Container(
                                  margin: EdgeInsets.all(10),
                                  alignment: Alignment.topRight,
                                  child: IconButton(
                                    icon: Icon(Icons.close, size: 30),
                                    color: Colors.white,
                                    onPressed: (){Navigator.pop(context);},
                                  ),
                                ),
                                TextWidget(
                                  text: 'Set Location',
                                  size: FontSize.s32,
                                  appcolor: Colors.white,
                                  type: 'Circular',
                                ),
                                Expanded(child: SizedBox(height: 20)),
                                InputWidget(
                                  obscure: false,
                                  hint: 'Street Address',
                                  controller: _streetController,
                                  validator: validateInput,
                                  keyboard: TextInputType.text,
                                ),
                                SizedBox(height: SizeConfig.sizeSmall),
                                Container(
                                  height: 60,
                                  decoration: BoxDecoration(
                                    color: BMColors.bg,
                                    borderRadius: BorderRadius.circular(5),
                                  ),
                                  // margin: EdgeInsets.only(top: 0, left: 0),
                                  child: DropdownButtonHideUnderline(
                                      child: Container(
                                        alignment: Alignment.centerLeft,
                                        margin: const EdgeInsets.symmetric(horizontal: 20),
                                        child: DropdownButton(
                                          isExpanded: true,
                                          hint: Text(
                                            'State',
                                            textAlign: TextAlign.left,
                                          ),
                                          value: _city,
                                          items: states.map((value) {
                                            return new DropdownMenuItem<String>(
                                              value: value.id,
                                              child: new Text(value.name),
                                            );
                                          }).toList(),
                                          onChanged: (value) {
                                            var name = states.firstWhere((i) => i.id == value).name;
                                            setState(() {
                                              _city = value;
                                              _busniessLocationController = TextEditingController(text: name);
                                              _lga = "1";
                                              lgas.clear();
                                            });
                                            _locationBloc.add(GetLGA(id: value)); //get lga here
                                          },
                                        ),
                                      )
                                  ),
                                ),
                                SizedBox(height: SizeConfig.sizeSmall),
                                Container(
                                  height: 60,
                                  decoration: BoxDecoration(
                                    color: BMColors.bg,
                                    borderRadius: BorderRadius.circular(5),
                                  ),
                                  // margin: EdgeInsets.only(top: 0, left: 0),
                                  child: DropdownButtonHideUnderline(
                                      child: Container(
                                        alignment: Alignment.centerLeft,
                                        margin: const EdgeInsets.symmetric(horizontal: 20),
                                        child: DropdownButton(
                                          isExpanded: true,
                                          hint: Text(
                                            'LGA',
                                            textAlign: TextAlign.left,
                                          ),
                                          value: _lga,
                                          items: lgas.map((value) {
                                            return new DropdownMenuItem<String>(
                                              value: value.id,
                                              child: new Text(value.name),
                                            );
                                          }).toList(),
                                          onChanged: (value) {
                                            print(value);
                                            var localGovt = lgas.firstWhere((i) => i.id == value).name;
                                            setState(() {
                                              _lga = value;
                                              _busniessLocationLGAController = TextEditingController(text: localGovt);
                                            });
                                          },
                                    ),
                                  )),
                                ),
                                SizedBox(height: SizeConfig.sizeLarge),
                                Container(
                                  width: double.infinity,
                                  height: SizeConfig.sizeXXXL,
                                  child: FlatButton(
                                    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(SizeConfig.sizeExtraSmall)),
                                    padding: EdgeInsets.all(SizeConfig.sizeMedium),
                                    color: BMColors.buttonColor,
                                    child: TextWidget(
                                      text: 'Save',
                                      appcolor: BMColors.white,
                                      size: FontSize.s16,
                                      type: 'Circular',
                                    ),
                                    onPressed: () {
                                      if (_lga != null &&
                                          _city != null &&
                                          _streetController.text != null) {
                                        setState(() {
                                          busStreet = _streetController.text;
                                          businessLga = _busniessLocationLGAController.text;
                                          businessState = _busniessLocationController.text;
                                        });
                                        Navigator.pop(context);
                                      }
                                    },
                                  ),
                                ),
                                Expanded(child: SizedBox(height: 20)),
                              ]),
                        ),
                      ),
                    )),
              ));
            })
    );
  }