feat: new widget query listable builder

2023-02-16 13:05:23 +06:00
parent a85434a4db
commit 975f9eafe1
4 changed files with 108 additions and 0 deletions
@@ -0,0 +1,35 @@
+import 'package:fl_query/fl_query.dart';
+import 'package:flutter/material.dart';
+import 'package:fl_query/src/widgets/state_notifier_listenable.dart';
+
+typedef QueryListenableBuilder<DataType, ErrorType, KeyType> = Widget Function(
+  BuildContext context,
+  Query<DataType, ErrorType, KeyType>? query,
+);
+
+class QueryListenable<DataType, ErrorType, KeyType> extends StatelessWidget {
+  final ValueKey<KeyType> queryKey;
+  final QueryListenableBuilder<DataType, ErrorType, KeyType> builder;
+  const QueryListenable(
+    this.queryKey, {
+    required this.builder,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final query = QueryClient.of(context)
+        .getQuery<DataType, ErrorType, KeyType>(queryKey);
+
+    if (query == null) {
+      return builder(context, null);
+    }
+    return StateNotifierListenable<QueryState<DataType, ErrorType>>(
+      notifier: query,
+      builder: (context, notifier) {
+        final query = notifier as Query<DataType, ErrorType, KeyType>;
+        return builder(context, query);
+      },
+    );
+  }
+}
@@ -0,0 +1,60 @@
+import 'package:flutter/material.dart';
+import 'package:state_notifier/state_notifier.dart';
+
+typedef StateNotifierListenableBuilder<T> = Widget Function(
+  BuildContext context,
+  StateNotifier<T> value,
+);
+
+class StateNotifierListenable<T> extends StatefulWidget {
+  final StateNotifier<T> notifier;
+  final StateNotifierListenableBuilder<T> builder;
+  const StateNotifierListenable({
+    required this.notifier,
+    required this.builder,
+    super.key,
+  });
+
+  @override
+  State<StateNotifierListenable<T>> createState() =>
+      _StateNotifierListenableState<T>();
+}
+
+class _StateNotifierListenableState<T>
+    extends State<StateNotifierListenable<T>> {
+  VoidCallback? removeListener;
+
+  void initialize() {
+    removeListener = widget.notifier.addListener((_) {
+      setState(() {});
+    });
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      initialize();
+    });
+  }
+
+  @override
+  void dispose() {
+    removeListener?.call();
+    super.dispose();
+  }
+
+  @override
+  void didUpdateWidget(covariant StateNotifierListenable<T> oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.notifier != widget.notifier) {
+      removeListener?.call();
+      initialize();
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return widget.builder(context, widget.notifier);
+  }
+}