feat: toast widget

[wiiznokes]

Attempt to implement pop-os/cosmic-files#183

I implemented this feature in fan-control. You can see the change i needed to make in this commit.

The duration chosen comes from Android.

There is more just to match the Ui design, but the idea is there. I'm not sure i will implement it as i don't really know where to search for padding, colours, ect..

[wiiznokes]

Should this be moved to core ?

[mmstick]

crate::command::future(async move {
    tokio::time::sleep(duration).await;
    Message::from(message)
})

[wiiznokes]

I had to write

crate::command::future(async move {
            tokio::time::sleep(duration).await;
            crate::app::Message::App(Message::from(message))
        })

[wiiznokes]

So, should this be moved to core, like the navbar? @mmstick

[mmstick]

Probably

[wiiznokes]

With the current impl, it requires Core to be generic over Message, is it ok?

[mmstick]

That kind of state should be in the app struct

[wiiznokes]

The only idea i have is adding this function in the Application trait fn toast_message(&self, toats_id: u32) -> Message; but it leaks to toasts_id implementation details, and it force the user to keep track of his toasts.

Can you think of a better solution ? Maybe it will be preferable to not include in core afterall

[mmstick]

I think it's fine for the app to store the model of the toaster. Similar to what it already does for other widgets.

[mmstick]

Thanks!