Manual scrolling in Grid

Thanks for this amazing project.

I have a question regarding Grid and grid.SetOffset method. Should I be "redrawing" my screen after setting the offset value via grid.SetOffset?

I have a flex app that consists of two items split vertically - A list and a grid. I switch between these using Application.SetFocus in my Application.SetInputCapture callback.

Grid consists of multiple Lists, where the first one is automatically focused when set via Grid.AddItem. This item captures the 'j' key in order to select the next list item, as shown in this excerpt:

trackLst.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
    switch event.Rune() {
    case 'j':
        if trackLst.GetCurrentItem()+1 == trackLst.GetItemCount() {
            // skip to the next album if available
            if a.currentAlbumIndex+1 == a.currentAlbumCount {
                // do nothing, return default, because this is the last album
                return nil
            } else {
                c.SetOffset(a.currentAlbumIndex+1, 0)
                // FIXME: still need to somehow redraw the screen?
                a.currentAlbumIndex = a.currentAlbumIndex + 1

                return tcell.NewEventKey(tcell.KeyDown, 0, tcell.ModNone)
            }
        }

        return tcell.NewEventKey(tcell.KeyDown, 0, tcell.ModNone)
    }

    return event

I am 100% sure c.SetOffset works and the provided parameter to it is correct since after I switch back from a Grid root element to my List root element (via Tab) it scrolls itself to only show me the needed Grid element.

App preview:

Should grid.SetOffset be refreshing this app portion automatically or should I be doing something in addition?

Thanks!

rivo / tview

Manual scrolling in Grid #989