Thread
#compose
    d

    Dylan

    1 year ago
    What's the best way to know the scroll direction of a LazyColumn? I'm currently using a LazyListState, and by keeping a reference of the last value of
    firstVisibleItemScrollOffset
    from LazyListState, I can compare it to the current value so if
    lastOffset
    is lower than
    firstVisibleItemScrollOffset
    , that means the user is scrolling down, however if
    lastOffset
    is higher than
    firstVisibleItemScrollOffset
    , that means the user is scrolling up. At least that's the result I was hoping for but unfortunately
    firstVisibleItemScrollOffset
    is often equal to
    lastOffset
    . So what is the best way to know the scroll direction of a LazyColumn? 🤔 (What I would like to achieve is similar to what we used to do with the XML Toolbar View using app:layout_scrollFlags)
    Jorkoh

    Jorkoh

    1 year ago
    There was a snippet for this in the animation codelab, not sure if it's the best approach tho
    Andrey Kulikov

    Andrey Kulikov

    1 year ago
    there is no way to get this info from LazyListState unfortunately. I would suggest you to ask users of your composable to specify the layoutDirection manually
    cb

    cb

    1 year ago
    d

    Dylan

    1 year ago
    Thanks all of you. The solution from the codelab partially works because I'm using an animation. However it's not ideal also because I'm using an animation. Chris' solution partially works too. I have to mention that I created a component similar to ScaffoldLayout. So I created the nestedScrollCollection in that layout, and passed it as an argument to my "content" parameter. Unfortunately while scrolling slowly the animation on the top bar is choppy. I'm not entirely sure why though. (This would be a great component in one of Compose's libraries)