class HintButtonOpenHandler(
hintEntranceButton: FloatingActionButton,
hintButtons: List<Button>,
wasHintOpened: Boolean,
private val darkBackgroundView: View
) {
private val innerButtons = mutableListOf<HintButton>()
private var animationDistance = 0f
var isHintOpen = wasHintOpened
private set
init {
hintEntranceButton.setOnClickListener {
when (isHintOpen) {
true -> closeHintAndDarkBackground()
false -> openHintAndDarkBackground()
}
}
hintEntranceButton.doOnLayout {
animationDistance = it.height.toFloat() + hintEntranceButton.getHintButtonMargin()
hintButtons.forEach(this::addInnerButton)
rollbackToPrevState()
}
}
private fun addInnerButton(button: Button) {
button.doOnLayout {
val openAnimator = ObjectAnimator
.ofFloat(button, "TranslationY", -animationDistance)
.setDuration(ANIMATION_DURATION)
innerButtons += HintButton(button, openAnimator)
animationDistance += (button.height + button.getHintButtonMargin())
}
}
private fun openHintAndDarkBackground() {
openHint()
isHintOpen = true
darkBackgroundView.visibility = View.VISIBLE
}
fun closeHintAndDarkBackground() {
closeHint()
isHintOpen = false
darkBackgroundView.visibility = View.GONE
}
private fun openHint() {
innerButtons.forEach {
it.open()
}
}
private fun closeHint() {
innerButtons.forEach {
it.close()
}
}
private fun rollbackToPrevState() {
if (isHintOpen) {
openHintAndDarkBackground()
}
}
private class HintButton(
private val button: Button,
private val openAnimator: ObjectAnimator
) {
init {
button.elevation = button.resources.getDimension(R.dimen.game_hintbutton_elevation)
button.isVisible = false
}
fun open() {
openAnimator.start()
button.isVisible = true
}
fun close() {
button.translationY = 0f
button.isVisible = false
}
}
companion object {
private const val ANIMATION_DURATION = 400L
}
}
private fun <T : View> T.getHintButtonMargin() = resources.getDimension(R.dimen.game_hintbutton_margin)
