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samples
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Code Issues Projects Releases Wiki Activity

add form_app (#463)

Browse Source 
* add form_app

* revert unrelated changes

* use links in README

* remove unnecessary type annotation

* Remove GlobalKey for sign_in_http sample

* reword comment

* run package:copywriter

* use relative import

* fix quotes

* Add punctuation

* make sure setState() is used in form_widgets sample

* avoid first person pronoun

* store date state in parent widget in form_widgets.dart
pull/473/head
John Ryan 5 years ago committed by GitHub
parent a94342d199
commit af5be70f34
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experimental/form_app/.gitignore vendored
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# Miscellaneous
*.class
*.log
*.pyc
*.swp
.DS_Store
.atom/
.buildlog/
.history
.svn/
# IntelliJ related
*.iml
*.ipr
*.iws
.idea/
# The .vscode folder contains launch configuration and tasks you configure in
# VS Code which you may wish to be included in version control, so this line
# is commented out by default.
#.vscode/
# Flutter/Dart/Pub related
**/doc/api/
**/ios/Flutter/.last_build_id
.dart_tool/
.flutter-plugins
.flutter-plugins-dependencies
.packages
.pub-cache/
.pub/
/build/
# Web related
lib/generated_plugin_registrant.dart
# Symbolication related
app.*.symbols
# Obfuscation related
app.*.map.json
# Exceptions to above rules.
!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages

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experimental/form_app/.metadata
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# This file tracks properties of this Flutter project.
# Used by Flutter tool to assess capabilities and perform upgrades etc.
#
# This file should be version controlled and should not be manually edited.
version:
revision: 8b63c6543644ba0e5205f6f0c28cc20f48d92550
channel: master
project_type: app

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experimental/form_app/README.md
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# form_app
A sample demonstrating different types of forms and best practices.
## Sign In w/ HTTP
[*lib/src/sign_in_http.dart*](lib/src/sign_in_http.dart)
A sign in form using `package:http` to send a request.
## Form widgets
[*lib/src/form_widgets.dart*](lib/src/form_widgets.dart)
A stylized form that uses widgets like TextField, DatePicker, Slider, Checkbox,
and Switch.
## Autofill
[*lib/src/autofill.dart*](lib/src/autofill.dart)
A form that uses AutofillGroup to auto-fill the users name, email, and address.
In order to use Autofill in a browser, your app needs to be hosted with HTTPS.
If you would like to test locally, you can build the app in release mode
(`flutter run -d chrome --release --web-port=5000`) and use
[ngrok](https://ngrok.com/) to create an HTTPS url for your local app (`ngrok
http 5000`)
## Validation
[*lib/src/validation.dart*](lib/src/validation.dart)
A form that alerts the user if the data entered is invalid.

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experimental/form_app/android/.gitignore vendored
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gradle-wrapper.jar
/.gradle
/captures/
/gradlew
/gradlew.bat
/local.properties
GeneratedPluginRegistrant.java
# Remember to never publicly share your keystore.
# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
key.properties

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experimental/form_app/android/app/build.gradle
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def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
localPropertiesFile.withReader('UTF-8') { reader ->
localProperties.load(reader)
}
}
def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}
def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
flutterVersionCode = '1'
}
def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
flutterVersionName = '1.0'
}
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
android {
compileSdkVersion 28
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
lintOptions {
disable 'InvalidPackage'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "dev.flutter.formApp.form_app"
minSdkVersion 16
targetSdkVersion 28
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
}
buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
}
}
}
flutter {
source '../..'
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

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experimental/form_app/android/app/src/debug/AndroidManifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="dev.flutter.formApp.form_app">
<!-- Flutter needs it to communicate with the running application
to allow setting breakpoints, to provide hot reload, etc.
-->
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>

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experimental/form_app/android/app/src/main/AndroidManifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="dev.flutter.formApp.form_app">
<!-- io.flutter.app.FlutterApplication is an android.app.Application that
calls FlutterMain.startInitialization(this); in its onCreate method.
In most cases you can leave this as-is, but you if you want to provide
additional functionality it is fine to subclass or reimplement
FlutterApplication and put your custom class here. -->
<application
android:name="io.flutter.app.FlutterApplication"
android:label="form_app"
android:icon="@mipmap/ic_launcher">
<activity
android:name=".MainActivity"
android:launchMode="singleTop"
android:theme="@style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- Specifies an Android theme to apply to this Activity as soon as
the Android process has started. This theme is visible to the user
while the Flutter UI initializes. After that, this theme continues
to determine the Window background behind the Flutter UI. -->
<meta-data
android:name="io.flutter.embedding.android.NormalTheme"
android:resource="@style/NormalTheme"
/>
<!-- Displays an Android View that continues showing the launch screen
Drawable until Flutter paints its first frame, then this splash
screen fades out. A splash screen is useful to avoid any visual
gap between the end of Android's launch screen and the painting of
Flutter's first frame. -->
<meta-data
android:name="io.flutter.embedding.android.SplashScreenDrawable"
android:resource="@drawable/launch_background"
/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:value="2" />
</application>
</manifest>

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experimental/form_app/android/app/src/main/kotlin/dev/flutter/formApp/form_app/MainActivity.kt
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package dev.flutter.formApp.form_app
import io.flutter.embedding.android.FlutterActivity
class MainActivity: FlutterActivity() {
}

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experimental/form_app/android/app/src/main/res/drawable/launch_background.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- Modify this file to customize your launch splash screen -->
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@android:color/white" />
<!-- You can insert your own image assets here -->
<!-- <item>
<bitmap
android:gravity="center"
android:src="@mipmap/launch_image" />
</item> -->
</layer-list>

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experimental/form_app/android/app/src/main/res/values/styles.xml
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<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- Theme applied to the Android Window while the process is starting -->
<style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
<!-- Show a splash screen on the activity. Automatically removed when
Flutter draws its first frame -->
<item name="android:windowBackground">@drawable/launch_background</item>
</style>
<!-- Theme applied to the Android Window as soon as the process has started.
This theme determines the color of the Android Window while your
Flutter UI initializes, as well as behind your Flutter UI while its
running.
This Theme is only used starting with V2 of Flutter's Android embedding. -->
<style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
<item name="android:windowBackground">@android:color/white</item>
</style>
</resources>

7
experimental/form_app/android/app/src/profile/AndroidManifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="dev.flutter.formApp.form_app">
<!-- Flutter needs it to communicate with the running application
to allow setting breakpoints, to provide hot reload, etc.
-->
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>

31
experimental/form_app/android/build.gradle
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buildscript {
ext.kotlin_version = '1.3.50'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.5.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
allprojects {
repositories {
google()
jcenter()
}
}
rootProject.buildDir = '../build'
subprojects {
project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
project.evaluationDependsOn(':app')
}
task clean(type: Delete) {
delete rootProject.buildDir
}

4
experimental/form_app/android/gradle.properties
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org.gradle.jvmargs=-Xmx1536M
android.enableR8=true
android.useAndroidX=true
android.enableJetifier=true

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experimental/form_app/android/gradle/wrapper/gradle-wrapper.properties vendored
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#Fri Jun 23 08:50:38 CEST 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip

15
experimental/form_app/android/settings.gradle
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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
include ':app'
def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
def properties = new Properties()
assert localPropertiesFile.exists()
localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
def flutterSdkPath = properties.getProperty("flutter.sdk")
assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

32
experimental/form_app/ios/.gitignore vendored
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*.perspectivev3
**/*sync/
.sconsign.dblite
.tags*
**/.vagrant/
**/DerivedData/
Icon?
**/Pods/
**/.symlinks/
profile
xcuserdata
**/.generated/
Flutter/App.framework
Flutter/Flutter.framework
Flutter/Flutter.podspec
Flutter/Generated.xcconfig
Flutter/app.flx
Flutter/app.zip
Flutter/flutter_assets/
Flutter/flutter_export_environment.sh
ServiceDefinitions.json
Runner/GeneratedPluginRegistrant.*
# Exceptions to above rules.
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!default.mode2v3
!default.pbxuser
!default.perspectivev3

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<?xml version="1.0" encoding="UTF-8"?>
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<key>CFBundleVersion</key>
<string>1.0</string>
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{
"images" : [
{
"idiom" : "universal",
"filename" : "LaunchImage.png",
"scale" : "1x"
},
{
"idiom" : "universal",
"filename" : "LaunchImage@2x.png",
"scale" : "2x"
},
{
"idiom" : "universal",
"filename" : "LaunchImage@3x.png",
"scale" : "3x"
}
],
"info" : {
"version" : 1,
"author" : "xcode"
}
}

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experimental/form_app/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md vendored
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# Launch Screen Assets
You can customize the launch screen with your own desired assets by replacing the image files in this directory.
You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.

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experimental/form_app/ios/Runner/Base.lproj/LaunchScreen.storyboard
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
<dependencies>
<deployment identifier="iOS"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="EHf-IW-A2E">
<objects>
<viewController id="01J-lp-oVM" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
<viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
</imageView>
</subviews>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
<constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="53" y="375"/>
</scene>
</scenes>
<resources>
<image name="LaunchImage" width="168" height="185"/>
</resources>
</document>

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experimental/form_app/ios/Runner/Base.lproj/Main.storyboard
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
<dependencies>
<deployment identifier="iOS"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
</dependencies>
<scenes>
<!--Flutter View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
<viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
</scene>
</scenes>
</document>

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experimental/form_app/ios/Runner/Info.plist
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>$(DEVELOPMENT_LANGUAGE)</string>
<key>CFBundleExecutable</key>
<string>$(EXECUTABLE_NAME)</string>
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>form_app</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>$(FLUTTER_BUILD_NAME)</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>$(FLUTTER_BUILD_NUMBER)</string>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>UILaunchStoryboardName</key>
<string>LaunchScreen</string>
<key>UIMainStoryboardFile</key>
<string>Main</string>
<key>UISupportedInterfaceOrientations</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
<string>UIInterfaceOrientationLandscapeLeft</string>
<string>UIInterfaceOrientationLandscapeRight</string>
</array>
<key>UISupportedInterfaceOrientations~ipad</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
<string>UIInterfaceOrientationPortraitUpsideDown</string>
<string>UIInterfaceOrientationLandscapeLeft</string>
<string>UIInterfaceOrientationLandscapeRight</string>
</array>
<key>UIViewControllerBasedStatusBarAppearance</key>
<false/>
</dict>
</plist>

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experimental/form_app/ios/Runner/Runner-Bridging-Header.h
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#import "GeneratedPluginRegistrant.h"

94
experimental/form_app/lib/main.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'src/autofill.dart';
import 'src/form_widgets.dart';
import 'src/http/mock_client.dart';
import 'src/sign_in_http.dart';
import 'src/validation.dart';
// Set up a mock HTTP client.
final http.Client httpClient = MockClient();
void main() {
runApp(FormApp());
}
final demos = [
Demo(
name: 'Sign in with HTTP',
route: '/signin_http',
builder: (context) => SignInHttpDemo(
httpClient: httpClient,
),
),
Demo(
name: 'Autofill',
route: '/autofill',
builder: (context) => AutofillDemo(),
),
Demo(
name: 'Form widgets',
route: '/form_widgets',
builder: (context) => FormWidgetsDemo(),
),
Demo(
name: 'Validation',
route: '/validation',
builder: (context) => FormValidationDemo(),
),
];
class FormApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Form Samples',
theme: ThemeData(primarySwatch: Colors.teal),
routes: Map.fromEntries(demos.map((d) => MapEntry(d.route, d.builder))),
home: HomePage(),
);
}
}
class HomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Form Samples'),
),
body: ListView(
children: [...demos.map((d) => DemoTile(d))],
),
);
}
}
class DemoTile extends StatelessWidget {
final Demo demo;
DemoTile(this.demo);
@override
Widget build(BuildContext context) {
return ListTile(
title: Text(demo.name),
onTap: () {
Navigator.pushNamed(context, demo.route);
},
);
}
}
class Demo {
final String name;
final String route;
final WidgetBuilder builder;
const Demo({this.name, this.route, this.builder});
}

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experimental/form_app/lib/src/autofill.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'package:flutter/material.dart';
// Demonstrates how to use autofill hints. The full list of hints is here:
// https://github.com/flutter/engine/blob/master/lib/web_ui/lib/src/engine/text_editing/autofill_hint.dart
class AutofillDemo extends StatefulWidget {
@override
_AutofillDemoState createState() => _AutofillDemoState();
}
class _AutofillDemoState extends State<AutofillDemo> {
final _formKey = GlobalKey<FormState>();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Autofill'),
),
body: Form(
key: _formKey,
child: Scrollbar(
child: SingleChildScrollView(
padding: EdgeInsets.all(16),
child: AutofillGroup(
child: Column(
children: [
...[
Text('This sample demonstrates autofill. '),
TextFormField(
decoration: InputDecoration(
hintText: 'Jane',
labelText: 'First Name',
),
autofillHints: [AutofillHints.givenName],
),
TextFormField(
decoration: InputDecoration(
hintText: 'Doe',
labelText: 'Last Name',
),
autofillHints: [AutofillHints.familyName],
),
TextField(
decoration: InputDecoration(
hintText: 'foo@example.com',
labelText: 'Email',
),
autofillHints: [AutofillHints.email],
),
TextField(
decoration: InputDecoration(
hintText: '(123) 456-7890',
labelText: 'Telephone',
),
autofillHints: <String>[AutofillHints.telephoneNumber],
),
TextField(
decoration: InputDecoration(
hintText: '123 4th Ave',
labelText: 'Street Address',
),
autofillHints: <String>[AutofillHints.streetAddressLine1],
),
TextField(
decoration: InputDecoration(
hintText: '12345',
labelText: 'Postal Code',
),
autofillHints: <String>[AutofillHints.postalCode],
),
TextField(
decoration: InputDecoration(
hintText: 'United States',
labelText: 'Country',
),
autofillHints: <String>[AutofillHints.countryName],
),
TextField(
decoration: InputDecoration(
hintText: '1',
labelText: 'Country Code',
),
autofillHints: <String>[AutofillHints.countryCode],
),
].expand(
(widget) => [
widget,
SizedBox(
height: 24,
)
],
)
],
),
),
),
),
),
);
}
}

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experimental/form_app/lib/src/form_widgets.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'package:flutter/material.dart';
import 'package:intl/intl.dart' as intl;
class FormWidgetsDemo extends StatefulWidget {
@override
_FormWidgetsDemoState createState() => _FormWidgetsDemoState();
}
class _FormWidgetsDemoState extends State<FormWidgetsDemo> {
final _formKey = GlobalKey<FormState>();
String title = '';
String description = '';
DateTime date = DateTime.now();
double maxValue = 0;
bool brushedTeeth = false;
bool enableFeature = false;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Form widgets'),
),
body: Form(
key: _formKey,
child: Scrollbar(
child: Align(
alignment: Alignment.topCenter,
child: Card(
child: SingleChildScrollView(
padding: EdgeInsets.all(16),
child: ConstrainedBox(
constraints: BoxConstraints(maxWidth: 400),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
...[
TextFormField(
decoration: InputDecoration(
filled: true,
hintText: 'Enter a title...',
labelText: 'Title',
),
onChanged: (value) {
setState(() {
title = value;
});
},
),
TextFormField(
decoration: InputDecoration(
border: const OutlineInputBorder(),
filled: true,
hintText: 'Enter a description...',
labelText: 'Description',
),
onChanged: (value) {
description = value;
},
maxLines: 5,
),
_FormDatePicker(
date: date,
onChanged: (value) {
setState(() {
date = value;
});
},
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
'Estimated value',
style: Theme.of(context).textTheme.bodyText1,
),
],
),
Text(
intl.NumberFormat.currency(
symbol: "\$", decimalDigits: 0)
.format(maxValue),
style: Theme.of(context).textTheme.subtitle1,
),
Slider(
min: 0,
max: 500,
divisions: 500,
value: maxValue,
onChanged: (value) {
setState(() {
maxValue = value;
});
},
),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Checkbox(
value: brushedTeeth,
onChanged: (checked) {
setState(() {
brushedTeeth = checked;
});
},
),
Text('Brushed Teeth',
style: Theme.of(context).textTheme.subtitle1),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text('Enable feature',
style: Theme.of(context).textTheme.bodyText1),
Switch(
value: enableFeature,
onChanged: (enabled) {
setState(() {
enableFeature = enabled;
});
},
),
],
),
].expand(
(widget) => [
widget,
SizedBox(
height: 24,
)
],
)
],
),
),
),
),
),
),
),
);
}
}
class _FormDatePicker extends StatefulWidget {
final DateTime date;
final ValueChanged onChanged;
_FormDatePicker({
this.date,
this.onChanged,
});
@override
_FormDatePickerState createState() => _FormDatePickerState();
}
class _FormDatePickerState extends State<_FormDatePicker> {
@override
Widget build(BuildContext context) {
return Row(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Text(
'Date',
style: Theme.of(context).textTheme.bodyText1,
),
Text(
intl.DateFormat.yMd().format(widget.date),
style: Theme.of(context).textTheme.subtitle1,
),
],
),
FlatButton(
child: Text('Edit'),
onPressed: () async {
var newDate = await showDatePicker(
context: context,
initialDate: widget.date,
firstDate: DateTime(1900),
lastDate: DateTime(2100),
);
// Don't change the date if the date picker returns null.
if (newDate == null) {
return;
}
widget.onChanged(newDate);
},
)
],
);
}
}

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experimental/form_app/lib/src/http/mock_client.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:mockito/mockito.dart';
class MockClient extends Mock implements http.Client {
MockClient() {
when(post('https://example.com/signin', body: anyNamed('body')))
.thenAnswer((answering) {
var body = answering.namedArguments[Symbol('body')];
if (body != null && body is String) {
var decodedJson = json.decode(body);
if (decodedJson['email'] == 'root' &&
decodedJson['password'] == 'password') {
return Future.value(http.Response('', 200));
}
}
return Future.value(http.Response('', 401));
});
when(post('https://example.com/signout'))
.thenAnswer((_) => Future.value(http.Response('', 401)));
}
}

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experimental/form_app/lib/src/sign_in_http.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:flutter/material.dart';
import 'package:json_annotation/json_annotation.dart';
part 'sign_in_http.g.dart';
@JsonSerializable()
class FormData {
String email;
String password;
FormData({
this.email,
this.password,
});
factory FormData.fromJson(Map<String, dynamic> json) =>
_$FormDataFromJson(json);
Map<String, dynamic> toJson() => _$FormDataToJson(this);
}
class SignInHttpDemo extends StatefulWidget {
final http.Client httpClient;
SignInHttpDemo({
this.httpClient,
});
@override
_SignInHttpDemoState createState() => _SignInHttpDemoState();
}
class _SignInHttpDemoState extends State<SignInHttpDemo> {
FormData formData = FormData();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Sign in Form'),
),
body: Form(
child: Scrollbar(
child: SingleChildScrollView(
padding: EdgeInsets.all(16),
child: Column(
children: [
...[
TextFormField(
decoration: InputDecoration(
filled: true,
hintText: 'Your email address',
labelText: 'Email',
),
onChanged: (value) {
formData.email = value;
},
),
TextFormField(
decoration: InputDecoration(
filled: true,
labelText: 'Password',
),
obscureText: true,
onChanged: (value) {
formData.password = value;
},
),
FlatButton(
child: Text('Sign in'),
onPressed: () async {
// Use a JSON encoded string to send
var result = await widget.httpClient.post(
'https://example.com/signin',
body: json.encode(formData.toJson()),
headers: {'content-type': 'application/json'});
if (result.statusCode == 200) {
_showDialog('Succesfully signed in.');
} else if (result.statusCode == 401) {
_showDialog('Unable to sign in.');
} else {
_showDialog('Something went wrong. Please try again.');
}
},
),
].expand(
(widget) => [
widget,
SizedBox(
height: 24,
)
],
)
],
),
),
),
),
);
}
void _showDialog(String message) {
showDialog(
context: context,
child: AlertDialog(
title: Text(message),
actions: [
FlatButton(
child: Text('OK'),
onPressed: () => Navigator.of(context).pop(),
),
],
),
);
}
}

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experimental/form_app/lib/src/sign_in_http.g.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// GENERATED CODE - DO NOT MODIFY BY HAND
part of 'sign_in_http.dart';
// **************************************************************************
// JsonSerializableGenerator
// **************************************************************************
FormData _$FormDataFromJson(Map<String, dynamic> json) {
return FormData(
email: json['email'] as String,
password: json['password'] as String,
);
}
Map<String, dynamic> _$FormDataToJson(FormData instance) => <String, dynamic>{
'email': instance.email,
'password': instance.password,
};

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experimental/form_app/lib/src/validation.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart' as english_words;
class FormValidationDemo extends StatefulWidget {
@override
_FormValidationDemoState createState() => _FormValidationDemoState();
}
class _FormValidationDemoState extends State<FormValidationDemo> {
final _formKey = GlobalKey<FormState>();
String adjective;
String noun;
bool agreedToTerms = false;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('📖 Story Generator'),
actions: [
Padding(
padding: EdgeInsets.all(8),
child: FlatButton(
textColor: Colors.white,
child: Text('Submit'),
onPressed: () {
// Validate the form by getting the FormState from the GlobalKey
// and calling validate() on it.
var valid = _formKey.currentState.validate();
if (!valid) {
return;
}
showDialog(
context: context,
builder: (context) => AlertDialog(
title: Text('Your story'),
content: Text('The $adjective developer saw a $noun'),
actions: [
FlatButton(
child: Text('Done'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
),
);
},
),
),
],
),
body: Form(
key: _formKey,
child: Scrollbar(
child: SingleChildScrollView(
padding: EdgeInsets.all(16),
child: Column(
children: [
// A text field that validates that the text is an adjective.
TextFormField(
validator: (value) {
if (value.isEmpty) {
return 'Please enter an adjective.';
}
if (english_words.adjectives.contains(value)) {
return null;
}
return 'Not a valid adjective.';
},
decoration: InputDecoration(
filled: true,
hintText: 'e.g. quick, beautiful, interesting',
labelText: 'Enter an adjective',
),
onChanged: (value) {
adjective = value;
},
),
SizedBox(
height: 24,
),
// A text field that validates that the text is a noun.
TextFormField(
validator: (value) {
if (value.isEmpty) {
return 'Please enter a noun.';
}
if (english_words.nouns.contains(value)) {
return null;
}
return 'Not a valid noun.';
},
decoration: InputDecoration(
filled: true,
hintText: 'i.e. a person, place or thing',
labelText: 'Enter a noun',
),
onChanged: (value) {
noun = value;
},
),
SizedBox(
height: 24,
),
// A custom form field that requires the user to check a
// checkbox.
FormField(
initialValue: false,
validator: (value) {
if (value == false) {
return 'You must agree to the terms of service.';
}
return null;
},
builder: (FormFieldState formFieldState) {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Checkbox(
value: agreedToTerms,
onChanged: (value) {
// When the value of the checkbox changes,
// update the FormFieldState so the form is
// re-validated.
formFieldState.didChange(value);
setState(() {
agreedToTerms = value;
});
},
),
Text(
'I agree to the terms of service.',
style: Theme.of(context).textTheme.subtitle1,
),
],
),
if (!formFieldState.isValid)
Text(
formFieldState.errorText ?? "",
style: Theme.of(context)
.textTheme
.caption
.copyWith(color: Theme.of(context).errorColor),
),
],
);
},
),
],
),
),
),
),
);
}
}

489
experimental/form_app/pubspec.lock
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# Generated by pub
# See https://dart.dev/tools/pub/glossary#lockfile
packages:
_fe_analyzer_shared:
dependency: transitive
description:
name: _fe_analyzer_shared
url: "https://pub.dartlang.org"
source: hosted
version: "3.0.0"
analyzer:
dependency: transitive
description:
name: analyzer
url: "https://pub.dartlang.org"
source: hosted
version: "0.39.8"
args:
dependency: transitive
description:
name: args
url: "https://pub.dartlang.org"
source: hosted
version: "1.6.0"
async:
dependency: transitive
description:
name: async
url: "https://pub.dartlang.org"
source: hosted
version: "2.4.1"
boolean_selector:
dependency: transitive
description:
name: boolean_selector
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.0"
build:
dependency: transitive
description:
name: build
url: "https://pub.dartlang.org"
source: hosted
version: "1.3.0"
build_config:
dependency: transitive
description:
name: build_config
url: "https://pub.dartlang.org"
source: hosted
version: "0.4.2"
build_daemon:
dependency: transitive
description:
name: build_daemon
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.4"
build_resolvers:
dependency: transitive
description:
name: build_resolvers
url: "https://pub.dartlang.org"
source: hosted
version: "1.3.9"
build_runner:
dependency: "direct dev"
description:
name: build_runner
url: "https://pub.dartlang.org"
source: hosted
version: "1.10.0"
build_runner_core:
dependency: transitive
description:
name: build_runner_core
url: "https://pub.dartlang.org"
source: hosted
version: "5.2.0"
built_collection:
dependency: transitive
description:
name: built_collection
url: "https://pub.dartlang.org"
source: hosted
version: "4.3.2"
built_value:
dependency: transitive
description:
name: built_value
url: "https://pub.dartlang.org"
source: hosted
version: "7.1.0"
charcode:
dependency: transitive
description:
name: charcode
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.3"
checked_yaml:
dependency: transitive
description:
name: checked_yaml
url: "https://pub.dartlang.org"
source: hosted
version: "1.0.2"
clock:
dependency: transitive
description:
name: clock
url: "https://pub.dartlang.org"
source: hosted
version: "1.0.1"
code_builder:
dependency: transitive
description:
name: code_builder
url: "https://pub.dartlang.org"
source: hosted
version: "3.3.0"
collection:
dependency: transitive
description:
name: collection
url: "https://pub.dartlang.org"
source: hosted
version: "1.14.12"
convert:
dependency: transitive
description:
name: convert
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.1"
crypto:
dependency: transitive
description:
name: crypto
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.5"
csslib:
dependency: transitive
description:
name: csslib
url: "https://pub.dartlang.org"
source: hosted
version: "0.16.1"
cupertino_icons:
dependency: "direct main"
description:
name: cupertino_icons
url: "https://pub.dartlang.org"
source: hosted
version: "0.1.3"
dart_style:
dependency: transitive
description:
name: dart_style
url: "https://pub.dartlang.org"
source: hosted
version: "1.3.6"
english_words:
dependency: "direct main"
description:
name: english_words
url: "https://pub.dartlang.org"
source: hosted
version: "3.1.5"
fake_async:
dependency: transitive
description:
name: fake_async
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.0"
fixnum:
dependency: transitive
description:
name: fixnum
url: "https://pub.dartlang.org"
source: hosted
version: "0.10.11"
flutter:
dependency: "direct main"
description: flutter
source: sdk
version: "0.0.0"
flutter_test:
dependency: "direct dev"
description: flutter
source: sdk
version: "0.0.0"
glob:
dependency: transitive
description:
name: glob
url: "https://pub.dartlang.org"
source: hosted
version: "1.2.0"
graphs:
dependency: transitive
description:
name: graphs
url: "https://pub.dartlang.org"
source: hosted
version: "0.2.0"
html:
dependency: transitive
description:
name: html
url: "https://pub.dartlang.org"
source: hosted
version: "0.14.0+3"
http:
dependency: "direct main"
description:
name: http
url: "https://pub.dartlang.org"
source: hosted
version: "0.12.1"
http_multi_server:
dependency: transitive
description:
name: http_multi_server
url: "https://pub.dartlang.org"
source: hosted
version: "2.2.0"
http_parser:
dependency: transitive
description:
name: http_parser
url: "https://pub.dartlang.org"
source: hosted
version: "3.1.4"
intl:
dependency: "direct main"
description:
name: intl
url: "https://pub.dartlang.org"
source: hosted
version: "0.16.1"
io:
dependency: transitive
description:
name: io
url: "https://pub.dartlang.org"
source: hosted
version: "0.3.4"
js:
dependency: transitive
description:
name: js
url: "https://pub.dartlang.org"
source: hosted
version: "0.6.1+1"
json_annotation:
dependency: "direct main"
description:
name: json_annotation
url: "https://pub.dartlang.org"
source: hosted
version: "3.0.1"
json_serializable:
dependency: "direct dev"
description:
name: json_serializable
url: "https://pub.dartlang.org"
source: hosted
version: "3.3.0"
logging:
dependency: transitive
description:
name: logging
url: "https://pub.dartlang.org"
source: hosted
version: "0.11.4"
matcher:
dependency: transitive
description:
name: matcher
url: "https://pub.dartlang.org"
source: hosted
version: "0.12.6"
meta:
dependency: transitive
description:
name: meta
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.8"
mime:
dependency: transitive
description:
name: mime
url: "https://pub.dartlang.org"
source: hosted
version: "0.9.6+3"
mockito:
dependency: "direct main"
description:
name: mockito
url: "https://pub.dartlang.org"
source: hosted
version: "4.1.1"
node_interop:
dependency: transitive
description:
name: node_interop
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.1"
node_io:
dependency: transitive
description:
name: node_io
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.1"
package_config:
dependency: transitive
description:
name: package_config
url: "https://pub.dartlang.org"
source: hosted
version: "1.9.3"
path:
dependency: transitive
description:
name: path
url: "https://pub.dartlang.org"
source: hosted
version: "1.7.0"
pedantic:
dependency: transitive
description:
name: pedantic
url: "https://pub.dartlang.org"
source: hosted
version: "1.9.0"
pool:
dependency: transitive
description:
name: pool
url: "https://pub.dartlang.org"
source: hosted
version: "1.4.0"
pub_semver:
dependency: transitive
description:
name: pub_semver
url: "https://pub.dartlang.org"
source: hosted
version: "1.4.4"
pubspec_parse:
dependency: transitive
description:
name: pubspec_parse
url: "https://pub.dartlang.org"
source: hosted
version: "0.1.5"
quiver:
dependency: transitive
description:
name: quiver
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.3"
shelf:
dependency: transitive
description:
name: shelf
url: "https://pub.dartlang.org"
source: hosted
version: "0.7.5"
shelf_web_socket:
dependency: transitive
description:
name: shelf_web_socket
url: "https://pub.dartlang.org"
source: hosted
version: "0.2.3"
sky_engine:
dependency: transitive
description: flutter
source: sdk
version: "0.0.99"
source_gen:
dependency: transitive
description:
name: source_gen
url: "https://pub.dartlang.org"
source: hosted
version: "0.9.5"
source_span:
dependency: transitive
description:
name: source_span
url: "https://pub.dartlang.org"
source: hosted
version: "1.7.0"
stack_trace:
dependency: transitive
description:
name: stack_trace
url: "https://pub.dartlang.org"
source: hosted
version: "1.9.3"
stream_channel:
dependency: transitive
description:
name: stream_channel
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.0"
stream_transform:
dependency: transitive
description:
name: stream_transform
url: "https://pub.dartlang.org"
source: hosted
version: "1.2.0"
string_scanner:
dependency: transitive
description:
name: string_scanner
url: "https://pub.dartlang.org"
source: hosted
version: "1.0.5"
term_glyph:
dependency: transitive
description:
name: term_glyph
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.0"
test_api:
dependency: transitive
description:
name: test_api
url: "https://pub.dartlang.org"
source: hosted
version: "0.2.16"
timing:
dependency: transitive
description:
name: timing
url: "https://pub.dartlang.org"
source: hosted
version: "0.1.1+2"
typed_data:
dependency: transitive
description:
name: typed_data
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.6"
vector_math:
dependency: transitive
description:
name: vector_math
url: "https://pub.dartlang.org"
source: hosted
version: "2.0.8"
watcher:
dependency: transitive
description:
name: watcher
url: "https://pub.dartlang.org"
source: hosted
version: "0.9.7+15"
web_socket_channel:
dependency: transitive
description:
name: web_socket_channel
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.0"
yaml:
dependency: transitive
description:
name: yaml
url: "https://pub.dartlang.org"
source: hosted
version: "2.2.1"
sdks:
dart: ">=2.7.0 <3.0.0"

22
experimental/form_app/pubspec.yaml
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name: form_app
description: A sample demonstrating different types of forms and best practices
publish_to: 'none'
version: 1.0.0+1
environment:
sdk: ">=2.7.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^0.1.3
intl: any
http: ^0.12.0
mockito: 4.1.1
json_annotation: ^3.0.0
english_words: ^3.1.0
dev_dependencies:
flutter_test:
sdk: flutter
json_serializable: ^3.0.0
build_runner: ^1.10.0
flutter:
uses-material-design: true

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33
experimental/form_app/web/index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="A sample demonstrating different types of forms and best practices">
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="form_app">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Favicon -->
<link rel="shortcut icon" type="image/png" href="favicon.png"/>
<title>form_app</title>
<link rel="manifest" href="manifest.json">
</head>
<body>
<!-- This script installs service_worker.js to provide PWA functionality to
application. For more information, see:
https://developers.google.com/web/fundamentals/primers/service-workers -->
<script>
if ('serviceWorker' in navigator) {
window.addEventListener('load', function () {
navigator.serviceWorker.register('flutter_service_worker.js');
});
}
</script>
<script src="main.dart.js" type="application/javascript"></script>
</body>
</html>

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experimental/form_app/web/manifest.json
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{
"name": "form_app",
"short_name": "form_app",
"start_url": ".",
"display": "standalone",
"background_color": "#0175C2",
"theme_color": "#0175C2",
"description": "A sample demonstrating different types of forms and best practices",
"orientation": "portrait-primary",
"prefer_related_applications": false,
"icons": [
{
"src": "icons/Icon-192.png",
"sizes": "192x192",
"type": "image/png"
},
{
"src": "icons/Icon-512.png",
"sizes": "512x512",
"type": "image/png"
}
]
}
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