TestStudyCardDeck.kt

val data = arrayListOf(
    StudyCard(0, "1$LOREM_IPSUM_FRONT", "1$LOREM_IPSUM_BACK"),
    StudyCard(1, "2$LOREM_IPSUM_FRONT", "2$LOREM_IPSUM_BACK"),
    StudyCard(2, "3$LOREM_IPSUM_FRONT", "3$LOREM_IPSUM_BACK"),
    StudyCard(3, "4$LOREM_IPSUM_FRONT", "4$LOREM_IPSUM_BACK"),
    StudyCard(4, "5$LOREM_IPSUM_FRONT", "5$LOREM_IPSUM_BACK"),
    StudyCard(5, "6$LOREM_IPSUM_FRONT", "6$LOREM_IPSUM_BACK")
)

@Preview
@Composable
fun TestStudyCardDeck() {
    var current by remember { mutableStateOf(0) }
    var visible by remember { mutableStateOf(3) }

    Scaffold(
        topBar = {
            Column {
                Row(Modifier.padding(16.dp)) {
                    NiceButton(title = "Next") {
                        if (current < data.lastIndex)
                            current += 1
                        else
                            current = 0
                    }
                    Spacer(Modifier.weight(1f))
                    NiceButton(title = "Add") {
                        if (visible < data.lastIndex)
                            visible += 1
                        else
                            visible = 1
                    }
                }
            }
        }
    ) {
        StudyCardDeck(current, visible, data)
    }
}