From 406a67827c35ef53c9d1004e1d754f0d14d76b6f Mon Sep 17 00:00:00 2001
From: ericdecanini <eddecanini@gmail.com>
Date: Fri, 29 Jul 2022 15:48:21 +0200
Subject: [PATCH] Adds scroll behaviour to FABs

---
 .../room/list/home/HomeRoomListFragment.kt    | 30 ++++++++++++++++---
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/vector/src/main/java/im/vector/app/features/home/room/list/home/HomeRoomListFragment.kt b/vector/src/main/java/im/vector/app/features/home/room/list/home/HomeRoomListFragment.kt
index cc211a31fa..e7882ff36f 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/list/home/HomeRoomListFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/list/home/HomeRoomListFragment.kt
@@ -20,10 +20,10 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.ConcatAdapter
 import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
 import com.airbnb.epoxy.EpoxyControllerAdapter
 import com.airbnb.epoxy.OnModelBuildFinishedListener
 import com.airbnb.mvrx.fragmentViewModel
@@ -72,7 +72,7 @@ class HomeRoomListFragment @Inject constructor(
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        sharedActionViewModel = activityViewModelProvider.get(RoomListQuickActionsSharedActionViewModel::class.java)
+        sharedActionViewModel = activityViewModelProvider[RoomListQuickActionsSharedActionViewModel::class.java]
         sharedActionViewModel
                 .stream()
                 .onEach { handleQuickActions(it) }
@@ -111,8 +111,7 @@ class HomeRoomListFragment @Inject constructor(
     }
 
     private fun setupFabs() {
-        views.newLayoutCreateChatButton.isVisible = true
-        views.newLayoutOpenSpacesButton.isVisible = true
+        showFABs()
 
         views.newLayoutCreateChatButton.setOnClickListener {
             // Click action for create chat modal goes here
@@ -121,6 +120,29 @@ class HomeRoomListFragment @Inject constructor(
         views.newLayoutOpenSpacesButton.setOnClickListener {
             // Click action for open spaces modal goes here
         }
+
+        // Hide FABs when list is scrolling
+        views.roomListView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+                views.createChatFabMenu.handler.removeCallbacksAndMessages(null)
+
+                when (newState) {
+                    RecyclerView.SCROLL_STATE_IDLE -> views.createChatFabMenu.postDelayed(::showFABs, 250)
+                    RecyclerView.SCROLL_STATE_DRAGGING,
+                    RecyclerView.SCROLL_STATE_SETTLING -> hideFABs()
+                }
+            }
+        })
+    }
+
+    private fun showFABs() {
+        views.newLayoutCreateChatButton.show()
+        views.newLayoutOpenSpacesButton.show()
+    }
+
+    private fun hideFABs() {
+        views.newLayoutCreateChatButton.hide()
+        views.newLayoutOpenSpacesButton.hide()
     }
 
     override fun invalidate() = withState(roomListViewModel) { state ->