flutter stepper
int _index = 0;
Stepper(
currentStep: _index,
onStepCancel: () {
if (_index > 0) {
setState(() { _index -= 1; });
}
},
onStepContinue: () {
if (_index <= 0) {
setState(() { _index += 1; });
}
},
onStepTapped: (int index) {
setState(() { _index = index; });
},
steps: <Step>[
Step(
title: const Text('Step 1 title'),
content: Container(
alignment: Alignment.centerLeft,
child: const Text('Content for Step 1')
),
),
const Step(
title: Text('Step 2 title'),
content: Text('Content for Step 2'),
),
],
);