Work about PagedList history with infinite scroll

lib/functions.dart

+

lib/main.dart

@@ -11,6 +11,8 @@ import 'package:intl/intl.dart';
 import 'api.dart';
 import "package:dio/dio.dart";
 
+List<String> litems = ["1", "2", "Third", "4"];
+
 void main() {
   runApp(MyApp());
 }
@@ -96,7 +98,9 @@ class _MyAppState extends State<MyApp> {
                               ),
                               style: TextStyle(
                                   fontSize: 30.0, color: Colors.black)),
+
                           TextField(
+
                               // Affichage history
                               enabled: false,
                               controller: this._outputHistory,
@@ -137,6 +141,11 @@ class _MyAppState extends State<MyApp> {
                         ],
                       ),
                     ),
+                    // new ListView.builder(
+                    //     itemCount: litems.length,
+                    //     itemBuilder: (BuildContext ctxt, int index) {
+                    //       return new Text(litems[index]);
+                    //     })
                   ],
                 );
               },
@@ -270,4 +279,5 @@ class _MyAppState extends State<MyApp> {
   //     print("Veuillez renseigner une clé publique");
   //   }
   // }
+
 }

lib/ui/exception_indicators/empty_list_indicator.dart

+import 'package:flutter/cupertino.dart';
+// import 'package:readwenderlich/ui/exception_indicators/exception_indicator.dart';
+
+/// Indicates that no items were found.
+class EmptyListIndicator extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) => const ExceptionIndicator(
+        title: 'Too much filtering',
+        message: 'We couldn\'t find any results matching your applied filters.',
+        assetName: 'assets/empty-box.png',
+      );
+}

lib/ui/exception_indicators/error_indicator.dart

+import 'dart:io';
+
+import 'package:flutter/material.dart';
+// import 'package:readwenderlich/ui/exception_indicators/generic_error_indicator.dart';
+// import 'package:readwenderlich/ui/exception_indicators/no_connection_indicator.dart';
+
+/// Based on the received error, displays either a [NoConnectionIndicator] or
+/// a [GenericErrorIndicator].
+class ErrorIndicator extends StatelessWidget {
+  const ErrorIndicator({
+    @required this.error,
+    this.onTryAgain,
+    Key key,
+  })  : assert(error != null),
+        super(key: key);
+
+  final dynamic error;
+  final VoidCallback onTryAgain;
+
+  @override
+  Widget build(BuildContext context) => error is SocketException
+      ? NoConnectionIndicator(
+          onTryAgain: onTryAgain,
+        )
+      : GenericErrorIndicator(
+          onTryAgain: onTryAgain,
+        );
+}

lib/ui/exception_indicators/exception_indicator.dart

+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+/// Basic layout for indicating that an exception occurred.
+class ExceptionIndicator extends StatelessWidget {
+  const ExceptionIndicator({
+    @required this.title,
+    @required this.assetName,
+    this.message,
+    this.onTryAgain,
+    Key key,
+  })  : assert(title != null),
+        assert(assetName != null),
+        super(key: key);
+  final String title;
+  final String message;
+  final String assetName;
+  final VoidCallback onTryAgain;
+
+  @override
+  Widget build(BuildContext context) => Center(
+        child: Padding(
+          padding: const EdgeInsets.symmetric(vertical: 32, horizontal: 16),
+          child: Column(
+            children: [
+              Image.asset(
+                assetName,
+              ),
+              const SizedBox(
+                height: 32,
+              ),
+              Text(
+                title,
+                textAlign: TextAlign.center,
+                style: Theme.of(context).textTheme.headline6,
+              ),
+              if (message != null)
+                const SizedBox(
+                  height: 16,
+                ),
+              if (message != null)
+                Text(
+                  message,
+                  textAlign: TextAlign.center,
+                ),
+              if (onTryAgain != null) const Spacer(),
+              if (onTryAgain != null)
+                SizedBox(
+                  height: 50,
+                  width: double.infinity,
+                  child: RaisedButton.icon(
+                    onPressed: onTryAgain,
+                    icon: const Icon(
+                      Icons.refresh,
+                      color: Colors.white,
+                    ),
+                    label: const Text(
+                      'Try Again',
+                      style: TextStyle(
+                        fontSize: 16,
+                        color: Colors.white,
+                      ),
+                    ),
+                  ),
+                ),
+            ],
+          ),
+        ),
+      );
+}

lib/ui/exception_indicators/generic_error_indicator.dart

+import 'package:flutter/cupertino.dart';
+// import 'package:readwenderlich/ui/exception_indicators/exception_indicator.dart';
+
+/// Indicates that an unknown error occurred.
+class GenericErrorIndicator extends StatelessWidget {
+  const GenericErrorIndicator({
+    Key key,
+    this.onTryAgain,
+  }) : super(key: key);
+
+  final VoidCallback onTryAgain;
+
+  @override
+  Widget build(BuildContext context) => ExceptionIndicator(
+        title: 'Something went wrong',
+        message: 'The application has encountered an unknown error.\n'
+            'Please try again later.',
+        assetName: 'assets/confused-face.png',
+        onTryAgain: onTryAgain,
+      );
+}

lib/ui/exception_indicators/no_connection_indicator.dart

+import 'package:flutter/cupertino.dart';
+// import 'package:readwenderlich/ui/exception_indicators/exception_indicator.dart';
+
+/// Indicates that a connection error occurred.
+class NoConnectionIndicator extends StatelessWidget {
+  const NoConnectionIndicator({
+    Key key,
+    this.onTryAgain,
+  }) : super(key: key);
+
+  final VoidCallback onTryAgain;
+
+  @override
+  Widget build(BuildContext context) => ExceptionIndicator(
+        title: 'No connection',
+        message: 'Please check internet connection and try again.',
+        assetName: 'assets/frustrated-face.png',
+        onTryAgain: onTryAgain,
+      );
+}

lib/ui/history_list_item.dart

+

lib/ui/history_list_screen.dart

+

lib/ui/history_list_view.dart

+

pubspec.lock

@@ -179,6 +179,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.1"
+  infinite_scroll_pagination:
+    dependency: "direct main"
+    description:
+      name: infinite_scroll_pagination
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.3"
   intl:
     dependency: "direct main"
     description:
@@ -254,6 +261,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.99"
+  sliver_tools:
+    dependency: transitive
+    description:
+      name: sliver_tools
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.10+1"
   source_span:
     dependency: transitive
     description:
@@ -326,4 +340,4 @@ packages:
     version: "2.2.1"
 sdks:
   dart: ">=2.10.0-110 <2.11.0"
-  flutter: ">=1.12.13+hotfix.5 <2.0.0"
+  flutter: ">=1.22.0 <2.0.0"

pubspec.yaml

@@ -33,11 +33,13 @@ dependencies:
   gql_link:
   intl:
   flutter_launcher_icons: "^0.8.0"
+  infinite_scroll_pagination: ^2.2.3
+
 
 flutter_icons:
   android: "launcher_icon"
   ios: true
-  image_path: "assets/icon/gecko-bb-36.png"
+  image_path: "assets/icon/gecko5b96.png"
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.