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Code Issues Projects Releases Wiki Activity

Remember the comments progress, scroll to top button for comments

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This commit is contained in:
Bnyro 2023-04-30 11:14:22 +02:00
parent 3f7872fa43
commit c4ccdedb93
5 changed files with 34 additions and 5 deletions
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2
app/src/main/java/com/github/libretube/ui/adapters/CommentsAdapter.kt
View File

@ -1,8 +1,6 @@
package com.github.libretube.ui.adapters
import android.annotation.SuppressLint
import android.os.Handler
import android.os.Looper
import android.text.method.LinkMovementMethod
import android.view.*
import android.view.ViewGroup.MarginLayoutParams

22
app/src/main/java/com/github/libretube/ui/fragments/CommentsMainFragment.kt
View File

@ -4,6 +4,7 @@ import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.core.view.isVisible
import androidx.fragment.app.Fragment
import androidx.fragment.app.activityViewModels
import androidx.recyclerview.widget.LinearLayoutManager
@ -11,6 +12,7 @@ import com.github.libretube.R
import com.github.libretube.databinding.FragmentCommentsBinding
import com.github.libretube.ui.adapters.CommentsAdapter
import com.github.libretube.ui.models.CommentsViewModel
import com.github.libretube.ui.sheets.CommentsSheet
class CommentsMainFragment : Fragment() {
private var _binding: FragmentCommentsBinding? = null
@ -32,11 +34,25 @@ class CommentsMainFragment : Fragment() {
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
binding.commentsRV.layoutManager = LinearLayoutManager(requireContext())
val layoutManager = LinearLayoutManager(requireContext())
binding.commentsRV.layoutManager = layoutManager
binding.commentsRV.setItemViewCacheSize(20)
binding.commentsRV.viewTreeObserver.addOnScrollChangedListener {
if (_binding?.commentsRV?.canScrollVertically(1) == false) {
val binding = _binding ?: return@addOnScrollChangedListener
// save the last scroll position to become used next time when the sheet is opened
viewModel.currentCommentsPosition = layoutManager.findFirstVisibleItemPosition()
// hide or show the scroll to top button
val commentsSheetBinding = (parentFragment as? CommentsSheet)?.binding
commentsSheetBinding?.btnScrollToTop?.isVisible = viewModel.currentCommentsPosition != 0
commentsSheetBinding?.btnScrollToTop?.setOnClickListener {
// scroll back to the top / first comment
binding.commentsRV.smoothScrollToPosition(0)
viewModel.currentCommentsPosition = 0
}
if (!binding.commentsRV.canScrollVertically(1)) {
viewModel.fetchNextComments()
}
}
@ -54,6 +70,8 @@ class CommentsMainFragment : Fragment() {
if (viewModel.commentsPage.value?.comments.orEmpty().isEmpty()) {
binding.progress.visibility = View.VISIBLE
viewModel.fetchComments()
} else {
binding.commentsRV.scrollToPosition(viewModel.currentCommentsPosition)
}
// listen for new comments to be loaded

3
app/src/main/java/com/github/libretube/ui/models/CommentsViewModel.kt
View File

@ -18,6 +18,8 @@ class CommentsViewModel : ViewModel() {
val commentSheetExpand = MutableLiveData<Boolean?>()
var currentCommentsPosition = 0
fun setCommentSheetExpand(value: Boolean?) {
if (commentSheetExpand.value != value) {
commentSheetExpand.value = value
@ -73,5 +75,6 @@ class CommentsViewModel : ViewModel() {
commentsPage.value = null
videoId = null
setCommentSheetExpand(null)
currentCommentsPosition = 0
}
}

2
app/src/main/java/com/github/libretube/ui/sheets/CommentsSheet.kt
View File

@ -17,7 +17,7 @@ import com.github.libretube.ui.fragments.CommentsRepliesFragment
import com.github.libretube.ui.models.CommentsViewModel
class CommentsSheet : ExpandedBottomSheet() {
private lateinit var binding: CommentsSheetBinding
lateinit var binding: CommentsSheetBinding
private val commentsViewModel: CommentsViewModel by activityViewModels()
override fun onCreateView(

10
app/src/main/res/layout/comments_sheet.xml
View File

@ -52,6 +52,16 @@
android:textAlignment="viewStart"
tools:text="Title" />
<androidx.appcompat.widget.AppCompatImageView
android:visibility="gone"
android:id="@+id/btnScrollToTop"
android:layout_width="35dp"
android:layout_height="35dp"
android:src="@drawable/ic_arrow_downward"
android:rotationX="180"
android:padding="7dp"
android:background="?selectableItemBackgroundBorderless" />
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/btnClose"
android:layout_width="35dp"