From 14d1f9241ccb8f6336fc231779a37c5ae577ed0a Mon Sep 17 00:00:00 2001
From: Thibault Deckers <thibault.deckers@gmail.com>
Date: Tue, 24 Mar 2020 09:49:14 +0900
Subject: [PATCH] changed fullscreen -> collection transition opacity

---
 lib/widgets/fullscreen/fullscreen_body.dart | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/widgets/fullscreen/fullscreen_body.dart b/lib/widgets/fullscreen/fullscreen_body.dart
index 6b91c65b5..a1f42af5a 100644
--- a/lib/widgets/fullscreen/fullscreen_body.dart
+++ b/lib/widgets/fullscreen/fullscreen_body.dart
@@ -412,7 +412,8 @@ class _FullscreenVerticalPageViewState extends State<FullscreenVerticalPageView>
   }
 
   void _onVerticalPageControllerChange() {
-    _backgroundColorNotifier.value = _backgroundColorNotifier.value.withOpacity(min(1.0, widget.verticalPager.page));
+    final opacity = min(1.0, widget.verticalPager.page);
+    _backgroundColorNotifier.value = _backgroundColorNotifier.value.withOpacity(opacity * opacity);
   }
 
   void _onImageChange() async {