Thanks @HosamHasanRamadan for opening this issue.
For sure, this is a great Idea.

Let's see how we can achieve it in the future

Yeah it is a great feature request, would love to have it in near future. I guess we can now think about the implementations and ways on how to achieve this

Hey, this seems to be a good issue to work on, is someone currently working on it?
I'd like to give it a shot

Hey @deepraj02
I appreciate it

It's yours now

@deepraj02, I wanted to follow up and ask if you've made any progress on this.

@payam-zahedi and @HosamHasanRamadan,
I hope this message finds you both well.

Over the past few days, I've been working on the Stacked Expandable concept. Attached to this comment is a video showing my progress:

Main Idea Behind the Implementation

Below is the core implementation concept:

OverlayEntry _createOverlayEntry() {
   ValueNotifier<bool> _isHovering = ValueNotifier<bool>(false);
   
   return OverlayEntry(
      opaque: false,
      builder: (context) {
         return Align(
            alignment: alignment,
            child: MouseRegion(...),
         );
      },
   );
}

I'm using the following elements to position the Toasts and achieve the expected animations and behavior:

• Stack
• AnimatedPositioned
• AnimatedOpacity
• TweenAnimationBuilder

Current Issues

While the implementation is progressing, I’m encountering some problems:

1. Overlay occupies entire vertical space: When I hover over areas that don’t contain the Toast but are positioned below it, the Toasts expand unexpectedly.
2. No exit animation: The Toast currently lacks an exit animation.
3. Hover behavior: When hovering over the Toasts, only the hovered Toast has its expiration time frozen, while the others continue to expire.
4. Dynamic updates: To ensure the Stack updates correctly when new items are added, I had to add a ValueNotifier<List<ToastificationItem>> to the _notifications list.

Wow really nice

Will you make a PR for that?

@payam-zahedi I've improved the code quality, but some of the issues are still present:

Current Issues

1. Overlay occupies entire vertical space: When I hover over areas that don’t contain the Toast but are positioned below it, the Toasts expand unexpectedly.
2. No exit animation: The Toast currently lacks an exit animation.
3. Dynamic updates: To ensure the Stack updates correctly when new items are added, I had to add a ValueNotifier<List> to the _notifications list.