Use Flushbar for Snackbars

The flutter default Snackbars are a major PITA to use as they require a
Scaffold, additionaly, they will not be shown if the parent Scaffold is
destroyed, which is the case when deleting a note and returning to the
main screen.

lib/screens/githostsetup_screens.dart

@@ -9,6 +9,7 @@ import 'package:gitjournal/analytics.dart';
 import 'package:gitjournal/apis/git.dart';
 import 'package:gitjournal/apis/githost_factory.dart';
 import 'package:gitjournal/state_container.dart';
+import 'package:gitjournal/utils.dart';
 import 'package:path/path.dart' as p;
 import 'package:url_launcher/url_launcher.dart';
 
@@ -319,10 +320,7 @@ class GitHostSetupScreenState extends State<GitHostSetupScreen> {
 
   void _copyKeyToClipboard(BuildContext context) {
     Clipboard.setData(ClipboardData(text: publicKey));
-    var text = "Public Key copied to Clipboard";
-    Scaffold.of(context)
-      ..removeCurrentSnackBar()
-      ..showSnackBar(SnackBar(content: Text(text)));
+    showSnackbar(context, "Public Key copied to Clipboard");
   }
 
   void _launchDeployKeyPage() async {

lib/screens/home_screen.dart

@@ -1,6 +1,7 @@
 import 'package:badges/badges.dart';
 import 'package:flutter/material.dart';
 import 'package:gitjournal/note.dart';
+import 'package:gitjournal/utils.dart';
 import 'package:gitjournal/apis/git.dart';
 import 'package:gitjournal/screens/note_editor.dart';
 import 'package:gitjournal/screens/note_viewer.dart';
@@ -72,9 +73,7 @@ class HomeScreen extends StatelessWidget {
               try {
                 await container.syncNotes();
               } on GitException catch (exp) {
-                _scaffoldKey.currentState
-                  ..removeCurrentSnackBar()
-                  ..showSnackBar(SnackBar(content: Text(exp.cause)));
+                showSnackbar(context, exp.cause);
               }
             }),
       ),

lib/screens/note_viewer.dart

@@ -28,7 +28,6 @@ class NoteBrowsingScreen extends StatefulWidget {
 
 class NoteBrowsingScreenState extends State<NoteBrowsingScreen> {
   PageController pageController;
-  final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();
 
   NoteBrowsingScreenState({@required int noteIndex}) {
     pageController = PageController(initialPage: noteIndex);
@@ -49,7 +48,6 @@ class NoteBrowsingScreenState extends State<NoteBrowsingScreen> {
     );
 
     return Scaffold(
-      key: _scaffoldKey,
       appBar: AppBar(
         title: Text('TIMELINE'),
         actions: <Widget>[
@@ -97,10 +95,7 @@ class NoteBrowsingScreenState extends State<NoteBrowsingScreen> {
     Navigator.pop(context);
 
     Fimber.d("Shwoing an undo snackbar");
-    var snackbar = buildUndoDeleteSnackbar(context, note, noteIndex);
-    _scaffoldKey.currentState
-      ..removeCurrentSnackBar()
-      ..showSnackBar(snackbar);
+    showUndoDeleteSnackbar(context, note, noteIndex);
   }
 
   Widget _buildAlertDialog(BuildContext context) {

lib/utils.dart

@@ -3,6 +3,8 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:package_info/package_info.dart';
 
+import 'package:flushbar/flushbar.dart';
+
 import 'app.dart';
 import 'note.dart';
 import 'state_container.dart';
@@ -40,22 +42,33 @@ Future<String> dumpAppLogs() async {
   return logsFilePath;
 }
 
-SnackBar buildUndoDeleteSnackbar(
+void showUndoDeleteSnackbar(
   BuildContext context,
   Note deletedNote,
   int deletedNoteIndex,
 ) {
-  var snackbar = SnackBar(
-    content: Text("Note Deleted"),
-    action: SnackBarAction(
-      label: "Undo",
+  var theme = Theme.of(context);
+
+  Flushbar(
+    message: "Note Deleted",
+    duration: Duration(seconds: 3),
+    mainButton: FlatButton(
+      child: Text(
+        "Undo",
+        style: TextStyle(color: theme.accentColor),
+      ),
       onPressed: () {
         Fimber.d("Undoing delete");
         var stateContainer = StateContainer.of(context);
         stateContainer.undoRemoveNote(deletedNote, deletedNoteIndex);
       },
     ),
-  );
-
-  return snackbar;
+  ).show(context);
+}
+
+void showSnackbar(BuildContext context, String message) {
+  Flushbar(
+    message: message,
+    duration: Duration(seconds: 3),
+  ).show(context);
 }

lib/widgets/journal_list.dart

@@ -58,8 +58,7 @@ class JournalList extends StatelessWidget {
             final stateContainer = StateContainer.of(context);
             stateContainer.removeNote(note);
 
-            Scaffold.of(context)
-                .showSnackBar(buildUndoDeleteSnackbar(context, note, i));
+            showUndoDeleteSnackbar(context, note, i);
           },
         );
       },

pubspec.lock

@@ -127,6 +127,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.0.2"
+  flushbar:
+    dependency: "direct main"
+    description:
+      name: flushbar
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.9.0"
   flutter:
     dependency: "direct main"
     description: flutter

pubspec.yaml

@@ -1,6 +1,6 @@
 name: gitjournal
 description: A Journaling App Built on top of Git
-version: 1.1.15+10
+version: 1.1.16+10
 
 dependencies:
   flutter:
@@ -26,6 +26,7 @@ dependencies:
   auto_size_text: ^2.0.1
   fimber: ^0.3.0
   dynamic_theme: ^1.0.0
+  flushbar: ^1.9.0
 
 dev_dependencies:
   flutter_launcher_icons: "^0.7.2"