ViewPager2 RTL Horizontal RecyclerView Android Kotlin

FragmentHomeschedule.kt

package /* TESTED ON ANDROID 12 */

import android.os.Bundle
import android.util.Log
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.MotionEvent
import android.view.View
import android.view.View.LAYOUT_DIRECTION_RTL
import android.view.ViewGroup
import androidx.core.view.ViewCompat
import androidx.databinding.DataBindingUtil
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.example.anymax_v1.MainActivity
import com.example.anymax_v1.R
import com.example.anymax_v1.adapters.DayOfWeekAdapter
import com.example.anymax_v1.databinding.FragmentHomeBinding

class Homeschedule : Fragment() {
    lateinit var binding: FragmentHomeBinding

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        // Inflate the layout for this fragment
        binding = DataBindingUtil.inflate(inflater, R.layout.fragment_home_schedule, container, false)

        val daysOfWeek = listOf(
            getString(R.string.sunday), getString(R.string.monday), getString(R.string.tuesday),
            getString(R.string.wednesday), getString(R.string.thursday), getString(R.string.friday),
            getString(R.string.saturday)
        )

        val adapter = DayOfWeekAdapter(daysOfWeek) { selectedDay ->
            // Handle day selection here
            Log.d("ScheduleFragment", "Selected day: $selectedDay")
        }

        binding.recyclerViewDays.apply {
            // Set the layout manager for horizontal scrolling in RTL
            layoutManager = LinearLayoutManager(requireContext(), LinearLayoutManager.HORIZONTAL, false)
            addOnItemTouchListener(object : RecyclerView.OnItemTouchListener {
                var lastX = 0

                override fun onInterceptTouchEvent(rv: RecyclerView, e: MotionEvent): Boolean {
                    when (e.action) {
                        MotionEvent.ACTION_DOWN -> {
                            lastX = e.x.toInt()
                        }
                        MotionEvent.ACTION_MOVE -> {
                            // Determine scrolling direction based on layout direction
                            val isScrollingRight = if (layoutDirection == LAYOUT_DIRECTION_RTL) {
                                e.x > lastX // Reverse scrolling logic for RTL
                            } else {
                                e.x < lastX
                            }
                            val layoutManager = rv.layoutManager as LinearLayoutManager
                            if ((isScrollingRight && layoutManager.findLastCompletelyVisibleItemPosition() == rv.adapter!!.itemCount - 1) ||
                                (!isScrollingRight && layoutManager.findFirstCompletelyVisibleItemPosition() == 0)) {
                                // Enable ViewPager swipe when at the start or end of the RecyclerView
                                (requireActivity() as MainActivity).binding.viewPager.isUserInputEnabled = true
                            } else {
                                // Disable ViewPager swipe while scrolling in the RecyclerView
                                (requireActivity() as MainActivity).binding.viewPager.isUserInputEnabled = false
                            }
                        }
                        MotionEvent.ACTION_UP -> {
                            lastX = 0
                            // Reset to allow swipe after touch ends
                            (requireActivity() as MainActivity).binding.viewPager.isUserInputEnabled = true
                        }
                    }
                    return false
                }

                override fun onTouchEvent(rv: RecyclerView, e: MotionEvent) {
                    // No-op
                }

                override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) {
                    // No-op
                }
            })
            this.adapter = adapter
        }
        return binding.root
    }
}