From d0bf93ebb706811707b956a22b051b6b2bbe02c9 Mon Sep 17 00:00:00 2001
From: Ivan Iskandar <12537387+ivaniskandar@users.noreply.github.com>
Date: Thu, 22 Apr 2021 04:43:53 +0700
Subject: [PATCH] MainActivity: Show bottom nav when the tab page is changed
 (#4914)

* MainActivity: Show bottom nav when the tab page is changed

* Revert "MainActivity: Show bottom nav when the tab page is changed"

This reverts commit 27fd73db

* MainActivity: Show bottom nav when the app bar is fully expanded
---
 .../java/eu/kanade/tachiyomi/ui/main/MainActivity.kt     | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt
index 0865205403..1d8d93d557 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt
@@ -130,6 +130,15 @@ class MainActivity : BaseViewBindingActivity<MainActivityBinding>() {
         tabAnimator = ViewHeightAnimator(binding.tabs, 0L)
         bottomNavAnimator = ViewHeightAnimator(binding.bottomNav)
 
+        // If bottom nav is hidden, make it visible again when the app bar is expanded
+        binding.appbar.addOnOffsetChangedListener(
+            AppBarLayout.OnOffsetChangedListener { _, verticalOffset ->
+                if (verticalOffset == 0) {
+                    showBottomNav(true)
+                }
+            }
+        )
+
         // Set behavior of bottom nav
         preferences.hideBottomBar()
             .asImmediateFlow { setBottomNavBehaviorOnScroll() }