DpadComposeViewHolder

A basic ViewHolder that forwards content to a ComposeView and handles focus and clicks inside the View system.

Focus is kept inside the internal ComposeView to ensure that it behaves correctly and to workaround the following issues:

1. Focus is not sent correctly from Views to Composables: b/268248352 This is solved by just holding the focus in ComposeView

2. Clicking on a focused Composable does not trigger the standard audio feedback: b/268268856 This is solved by just handling the click on ComposeView directly

This allows inline definition of ViewHolders in onCreateViewHolder:

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DpadComposeViewHolder<Int> {
    return DpadComposeViewHolder(parent) { item, isFocused ->
         ItemComposable(item, isFocused)
    }
}

To update the current item, override onBindViewHolder and call setItemState:

override fun onBindViewHolder(holder: DpadComposeViewHolder<Int>, position: Int) {
     holder.setItemState(getItem(position))
}