Can i use if statement to switch between locations?

I hope this meet all flutter developers well.

i'm working on an app and there are several issues i've been going through. here is my question.

i want to switch between selectedLocations and it will bring out forms related to the location out for users to fill.

here are the locations below in pictures and the codes follows.

    void switchSelectedCountry(selection) {
    events = selection;
    scoops = selection;
    setState(() {
      _selectedLocation = selection;
    });
  }

formField: FixDropdownButtonFormField(
                      value: _selectedLocation,
                      hint: Text('Select'),
                      items: <String>['Scoops', 'Events',].map((String value) {
                        return new FixDropdownMenuItem<String>(
                          value: value,
                          child: new Text(value),
                        );
                      }).toList(),
                      onChanged: (newValue) {
                        setState(() {
                          _selectedLocation = newValue;
                        });
                      },
                    ),
                  ),