Adds shared preferences for config/theme storage + refactors a streamstate

1 files changed, 31 insertions, 0 deletions

diff --git a/lib/helpers/StreamState.dart b/lib/helpers/StreamState.dart
new file mode 100644
index 0000000..3e329ed
--- /dev/null
+++ b/lib/helpers/StreamState.dart
@@ -0,0 +1,31 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+
+class StreamStateValue<Value> {
+  Stream<Value> stream$;
+  Value value;
+
+  StreamStateValue({ this.stream$, this.value }) {}
+
+  StreamSubscription initialize(void Function(void Function()) setState) {
+    return stream$.listen((Value v) {
+      setState(() { value = v; });
+    });
+  }
+}
+
+abstract class StreamState<T extends StatefulWidget> extends State<T> {
+  List<StreamSubscription> subs = <StreamSubscription>[];
+
+  void initStateValue<V>(StreamStateValue<V> streamVal) {
+    subs.add(streamVal.initialize(setState));
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    for(StreamSubscription sub in subs) {
+      sub.cancel();
+    }
+  }
+}