--- a/app/src/main/java/com/geekorum/ttrss/articles_list/ArticleListActivity.kt	Thu Feb 06 11:39:22 2020 -0400
+++ b/app/src/main/java/com/geekorum/ttrss/articles_list/ArticleListActivity.kt	Thu Feb 06 11:39:03 2020 -0400
@@ -81,6 +81,7 @@
     private lateinit var inAppUpdatePresenter: InAppUpdatePresenter
     private lateinit var searchToolbarPresenter: SearchToolbarPresenter
     private lateinit var appBarPresenter: AppBarPresenter
+    private lateinit var fabPresenter: FabPresenter
     private lateinit var feedNavigationPresenter: FeedsNavigationMenuPresenter
     private lateinit var accountHeaderPresenter: AccountHeaderPresenter
     private lateinit var drawerLayoutPresenter: DrawerLayoutPresenter
@@ -130,25 +131,19 @@
 
         inAppUpdatePresenter = InAppUpdatePresenter(binding.bannerContainer, this, inAppUpdateViewModel)
 
-        navController = findNavController(R.id.middle_pane_layout).apply {
-            addOnDestinationChangedListener { controller, destination, arguments ->
-                when (destination.id) {
-                    R.id.articlesListFragment -> {
-                        binding.fab.show()
-                    }
-                    R.id.articlesSearchFragment -> {
-                        //TODO hide fab. but fab has scrollaware behavior that get it shown back when scrolling
-                    }
-                }
-            }
-        }
+        navController = findNavController(R.id.middle_pane_layout)
 
         setupToolbar()
-        setUpNavigationView()
-        setUpEdgeToEdge()
+        setupNavigationView()
+        setupEdgeToEdge()
+        setupFab()
     }
 
-    private fun setUpEdgeToEdge() {
+    private fun setupFab() {
+        fabPresenter = FabPresenter(binding.fab, navController)
+    }
+
+    private fun setupEdgeToEdge() {
         window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
                 View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
 
@@ -187,7 +182,7 @@
         appBarPresenter = AppBarPresenter(binding.appBar, binding.toolbar, navController)
     }
 
-    private fun setUpNavigationView() {
+    private fun setupNavigationView() {
         binding.navigationView.setNavigationItemSelectedListener {
             when(it.itemId) {
                 R.id.manage_feeds -> {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/com/geekorum/ttrss/articles_list/FabPresenter.kt	Thu Feb 06 11:39:03 2020 -0400
@@ -0,0 +1,54 @@
+/*
+ * Geekttrss is a RSS feed reader application on the Android Platform.
+ *
+ * Copyright (C) 2017-2019 by Frederic-Charles Barthelery.
+ *
+ * This file is part of Geekttrss.
+ *
+ * Geekttrss is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Geekttrss is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Geekttrss.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.geekorum.ttrss.articles_list
+
+import androidx.navigation.NavController
+import androidx.navigation.dynamicfeatures.DynamicGraphNavigator
+import com.geekorum.ttrss.R
+import com.google.android.material.floatingactionbutton.FloatingActionButton
+
+/**
+ * Controls the behavior of the FloatingActionButton
+ */
+internal class FabPresenter(
+    private val fab: FloatingActionButton,
+    private val navController: NavController
+){
+
+    init {
+        setup()
+    }
+
+    private fun setup() {
+        navController.addOnDestinationChangedListener { controller, destination, arguments ->
+            val progressDestinationId = (controller.graph as? DynamicGraphNavigator.DynamicNavGraph)?.progressDestination ?: 0
+            when (destination.id) {
+                progressDestinationId -> {
+                    fab.hide()
+                }
+                R.id.articlesSearchFragment -> {
+                    //TODO hide fab. but fab has scrollaware behavior that get it shown back when scrolling
+                }
+                else -> fab.show()
+            }
+        }
+    }
+}