From db5d04c37a4489c9fcb3e2fcd56646447aa0a76a Mon Sep 17 00:00:00 2001
From: Jaya <jayabrowndev@gmail.com>
Date: Tue, 5 Nov 2024 10:39:58 +0700
Subject: [PATCH] Add optional scroll listener (#31)

* Add optional scroll listener

* Pass in scrollController
---
 lib/src/lyrics_renderer.dart | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/src/lyrics_renderer.dart b/lib/src/lyrics_renderer.dart
index 85f2c61..eefe306 100644
--- a/lib/src/lyrics_renderer.dart
+++ b/lib/src/lyrics_renderer.dart
@@ -51,6 +51,9 @@ class LyricsRenderer extends StatefulWidget {
   /// If not defined it will be the italic version of [textStyle]
   final TextStyle? commentStyle;
 
+  /// Optional external scroll controller, otherwise will be created internally
+  final ScrollController? scrollController;
+
   const LyricsRenderer(
       {Key? key,
       required this.lyrics,
@@ -70,7 +73,8 @@ class LyricsRenderer extends StatefulWidget {
       this.scrollPhysics = const ClampingScrollPhysics(),
       this.leadingWidget,
       this.trailingWidget,
-      this.chordNotation = ChordNotation.american})
+      this.chordNotation = ChordNotation.american,
+      this.scrollController})
       : super(key: key);
 
   @override
@@ -97,7 +101,7 @@ class _LyricsRendererState extends State<LyricsRenderer> {
           fontStyle: FontStyle.italic,
           fontSize: widget.textStyle.fontSize! - 2,
         );
-    _controller = ScrollController();
+    _controller = widget.scrollController ?? ScrollController();
     WidgetsBinding.instance.addPostFrameCallback((_) {
       // executes after build
       _scrollToEnd();