What, When and How to use MaterialTapTargetSize in flutter

Question

I am new to flutter. While I am wandering through flutter docs. I found MaterialTapTargetSize in Button's property. The docs made me confused.

So I want to know

1. what is the usage of MaterialTapTargetSize property?
2. When to use?
3. How to use?

simple English that would be better for me. Thank you

Answer 1

1. The MaterialTapTargetSize property of a widget set an area around a widget to catch gestures etc. The area around the checkbox below is an example.

2. An instance would be when you want this

but you have this

Notice the space around the checkbox is preventing it from aligning to the start as the TextField above it.

3.  Checkbox(
    value: model.checkboxValue,
    onChanged: (onChanged) {
    model.onCheckboxChecked(onChanged);
    },
    materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
    ),
   

Note that this reduces the space around the checkbox, it doesn't remove it fully.