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Code Issues Packages Projects Releases Wiki Activity

Add scroll to bottom button plumming

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This commit is contained in:
Niels Andriesse 2021-06-23 14:48:29 +10:00
parent 74697b0be7
commit 75d58677e4
2 changed files with 38 additions and 4 deletions
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19
app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt
View File

@ -6,11 +6,13 @@ import android.content.res.Resources
import android.database.Cursor
import android.graphics.Rect
import android.os.Bundle
import android.util.Log
import android.view.*
import android.widget.RelativeLayout
import androidx.loader.app.LoaderManager
import androidx.loader.content.Loader
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.activity_conversation_v2.*
import kotlinx.android.synthetic.main.activity_conversation_v2.view.*
import kotlinx.android.synthetic.main.activity_conversation_v2_action_bar.*
@ -34,11 +36,12 @@ import org.thoughtcrime.securesms.database.DraftDatabase.Drafts
import org.thoughtcrime.securesms.database.model.MessageRecord
import org.thoughtcrime.securesms.loki.utilities.toPx
import org.thoughtcrime.securesms.mms.GlideApp
import kotlin.math.abs
import kotlin.math.roundToInt
import kotlin.math.sqrt
import kotlin.math.*
class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDelegate, InputBarRecordingViewDelegate {
class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDelegate,
InputBarRecordingViewDelegate, ConversationRecyclerViewDelegate {
private val scrollButtonFullVisibilityThreshold by lazy { toPx(120.0f, resources) }
private val scrollButtonNoVisibilityThreshold by lazy { toPx(20.0f, resources) }
private val screenWidth = Resources.getSystem().displayMetrics.widthPixels
private var threadID: Long = -1
private var actionMode: ActionMode? = null
@ -102,6 +105,7 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
conversationRecyclerView.adapter = adapter
val layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, true)
conversationRecyclerView.layoutManager = layoutManager
conversationRecyclerView.delegate = this
// Workaround for the fact that CursorRecyclerViewAdapter doesn't auto-update automatically (even though it says it will)
LoaderManager.getInstance(this).restartLoader(0, null, object : LoaderManager.LoaderCallbacks<Cursor> {
@ -304,6 +308,13 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
}
animation.start()
}
override fun handleConversationRecyclerViewBottomOffsetChanged(bottomOffset: Int) {
val rawAlpha = (bottomOffset.toFloat() - scrollButtonNoVisibilityThreshold) /
(scrollButtonFullVisibilityThreshold - scrollButtonNoVisibilityThreshold)
val alpha = max(min(rawAlpha, 1.0f), 0.0f)
Log.d("Test", "$alpha")
}
// endregion
// region Interaction

23
app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationRecyclerView.kt
View File

@ -2,17 +2,21 @@ package org.thoughtcrime.securesms.conversation.v2
import android.content.Context
import android.util.AttributeSet
import android.util.Log
import android.view.MotionEvent
import android.view.VelocityTracker
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.activity_conversation_v2.*
import org.thoughtcrime.securesms.loki.utilities.disableClipping
import org.thoughtcrime.securesms.loki.utilities.toPx
import kotlin.math.abs
import kotlin.math.max
class ConversationRecyclerView : RecyclerView {
private val maxLongPressVelocityY = toPx(10, resources)
private val minSwipeVelocityX = toPx(10, resources)
private var velocityTracker: VelocityTracker? = null
var delegate: ConversationRecyclerViewDelegate? = null
constructor(context: Context) : super(context) { initialize() }
constructor(context: Context, attrs: AttributeSet) : super(context, attrs) { initialize() }
@ -20,6 +24,20 @@ class ConversationRecyclerView : RecyclerView {
private fun initialize() {
disableClipping()
addOnScrollListener(object : RecyclerView.OnScrollListener() {
private var maxScrollOffset = 0
override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
// Do nothing
}
override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
val scrollOffset = recyclerView.computeVerticalScrollOffset()
maxScrollOffset = max(maxScrollOffset, scrollOffset)
val bottomOffset = (maxScrollOffset - scrollOffset)
delegate?.handleConversationRecyclerViewBottomOffsetChanged(bottomOffset)
}
})
}
override fun onInterceptTouchEvent(e: MotionEvent): Boolean {
@ -48,4 +66,9 @@ class ConversationRecyclerView : RecyclerView {
velocityTracker?.addMovement(e)
return super.dispatchTouchEvent(e)
}
}
interface ConversationRecyclerViewDelegate {
fun handleConversationRecyclerViewBottomOffsetChanged(bottomOffset: Int)
}