how to control the index from another widget?

[xabhinavanand]

I want to add a slider which can control the index of the card. Can you please help me with that??

[BRTZL]

You can't directly change index after render. But by using async example you can rerender with given list of data.

So at start you have a list with length of 10, and you want to show third item. You can remove items at index 1 and 2 and you only left with list which starts at third item. So all we need to do is get a sublist from index to length of original list.

For example

List<dynamic> list;

// for going given index
void changeIndex(int index) {
    _streamController.add(list.sublist(index, list.length));
}