From 7052d73772ae54256c2d487e47420323cee05187 Mon Sep 17 00:00:00 2001
From: nights99 <jn@pynights.me.uk>
Date: Mon, 1 May 2023 14:16:17 +0100
Subject: [PATCH] filter state seems to rely on the selectedItems list being
 the empty list rather than null - see e.g. the setter function. So, proposal
 is to initialise the list to the empty list when null has been passed through
 to the initialiser - which is what happens when selectedListData is not
 specified when FilterListWidget is created.

---
 lib/src/state/filter_state.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/src/state/filter_state.dart b/lib/src/state/filter_state.dart
index d2b01f3..7fc8819 100644
--- a/lib/src/state/filter_state.dart
+++ b/lib/src/state/filter_state.dart
@@ -3,7 +3,7 @@ import 'package:flutter/material.dart';
 
 class FilterState<K> extends ListenableState {
   FilterState({List<K>? allItems, List<K>? selectedItems}) {
-    this.selectedItems = selectedItems;
+    this.selectedItems = selectedItems ?? [];
     items = allItems;
   }