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Add swipe to reply icon

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This commit is contained in:
nielsandriesse 2021-06-04 14:21:08 +10:00
parent 37a0263670
commit e0809e5eda
1 changed files with 40 additions and 6 deletions
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46
app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationTouchHelperCallback.kt
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@ -2,14 +2,23 @@ package org.thoughtcrime.securesms.conversation.v2
import android.content.Context
import android.graphics.Canvas
import android.graphics.Rect
import android.view.HapticFeedbackConstants
import androidx.core.content.ContextCompat
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.view_visible_message.view.*
import network.loki.messenger.R
import org.thoughtcrime.securesms.conversation.v2.messages.VisibleMessageView
import org.thoughtcrime.securesms.loki.utilities.toDp
import org.thoughtcrime.securesms.loki.utilities.toPx
import kotlin.math.abs
import kotlin.math.min
import kotlin.math.roundToInt
class ConversationTouchHelperCallback(private val adapter: ConversationAdapter, private val context: Context,
private val onSwipe: (Int) -> Unit) : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) {
private val background = ContextCompat.getDrawable(context, R.drawable.ic_baseline_reply_24)!!
private var previousX: Float = 0.0f
companion object {
@ -24,16 +33,41 @@ class ConversationTouchHelperCallback(private val adapter: ConversationAdapter,
adapter.notifyItemChanged(viewHolder.adapterPosition)
}
override fun onChildDraw(c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean) {
super.onChildDraw(c, recyclerView, viewHolder, dX / 4 , dY, actionState, isCurrentlyActive)
val x = abs(toDp(dX, context.resources))
override fun onChildDraw(c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder,
dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean) {
val adjustedDistanceInPx = dX / 4
super.onChildDraw(c, recyclerView, viewHolder, adjustedDistanceInPx, dY, actionState, isCurrentlyActive)
val absDistanceInDp = abs(toDp(dX, context.resources))
val threshold = ConversationTouchHelperCallback.swipeToReplyThreshold
if (x > threshold && previousX < threshold) {
val view = viewHolder.itemView
val view = viewHolder.itemView
if (view !is VisibleMessageView) { return }
// Draw the background
val messageContentView = view.messageContentView
if (dX < 0) { // Swipe to the left
val alpha = min(absDistanceInDp, threshold) / threshold
background.alpha = (alpha * 255.0f).roundToInt()
val spacing = context.resources.getDimension(R.dimen.medium_spacing).toInt()
val itemViewTop = viewHolder.itemView.top
val itemViewBottom = viewHolder.itemView.bottom
val height = itemViewBottom - itemViewTop
val iconSize = toPx(24, context.resources)
val offset = (height - iconSize) / 2
background.bounds = Rect(
messageContentView.right + adjustedDistanceInPx.toInt() + spacing,
itemViewTop + offset,
messageContentView.right + adjustedDistanceInPx.toInt() + iconSize + spacing,
itemViewTop + offset + iconSize
)
} else {
//background.setBounds(0, 0, 0, 0)
}
background.draw(c)
// Perform haptic feedback and invoke onSwipe callback if threshold has been reached
if (absDistanceInDp > threshold && previousX < threshold) {
view.isHapticFeedbackEnabled = true
view.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS)
onSwipe(viewHolder.adapterPosition)
}
previousX = x
previousX = absDistanceInDp
}
}