Added a working example for TypeAhead usage

Author: danvick

example/lib/main.dart

@@ -16,29 +16,6 @@ class MyApp extends StatelessWidget {
   }
 }
 
-class AppProfile {
-  final String name;
-  final String email;
-  final String imageUrl;
-
-  const AppProfile(this.name, this.email, this.imageUrl);
-
-  @override
-  bool operator ==(Object other) =>
-      identical(this, other) ||
-      other is AppProfile &&
-          runtimeType == other.runtimeType &&
-          name == other.name;
-
-  @override
-  int get hashCode => name.hashCode;
-
-  @override
-  String toString() {
-    return name;
-  }
-}
-
 class MyHomePage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
@@ -61,6 +38,9 @@ class MyHomePage extends StatelessWidget {
           'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
     ];
 
+    const allCountries = ["Afghanistan", "Albania", "Algeria", "American Samoa", "Andorra", "Angola", "Anguilla", "Antarctica", "Antigua and Barbuda", "Argentina", "Armenia", "Aruba", "Australia", "Austria", "Azerbaijan", "Bahamas", "Bahrain", "Bangladesh", "Barbados", "Belarus", "Belgium", "Belize", "Benin", "Bermuda", "Bhutan", "Bolivia", "Bosnia and Herzegowina", "Botswana", "Bouvet Island", "Brazil", "British Indian Ocean Territory", "Brunei Darussalam", "Bulgaria", "Burkina Faso", "Burundi", "Cambodia", "Cameroon", "Canada", "Cape Verde", "Cayman Islands", "Central African Republic", "Chad", "Chile", "China", "Christmas Island", "Cocos (Keeling) Islands", "Colombia", "Comoros", "Congo", "Congo, the Democratic Republic of the", "Cook Islands", "Costa Rica", "Cote d'Ivoire", "Croatia (Hrvatska)", "Cuba", "Cyprus", "Czech Republic", "Denmark", "Djibouti", "Dominica", "Dominican Republic", "East Timor", "Ecuador", "Egypt", "El Salvador", "Equatorial Guinea", "Eritrea", "Estonia", "Ethiopia", "Falkland Islands (Malvinas)", "Faroe Islands", "Fiji", "Finland", "France", "France Metropolitan", "French Guiana", "French Polynesia", "French Southern Territories", "Gabon", "Gambia", "Georgia", "Germany", "Ghana", "Gibraltar", "Greece", "Greenland", "Grenada", "Guadeloupe", "Guam", "Guatemala", "Guinea", "Guinea-Bissau", "Guyana", "Haiti", "Heard and Mc Donald Islands", "Holy See (Vatican City State)", "Honduras", "Hong Kong", "Hungary", "Iceland", "India", "Indonesia", "Iran (Islamic Republic of)", "Iraq", "Ireland", "Israel", "Italy", "Jamaica", "Japan", "Jordan", "Kazakhstan", "Kenya", "Kiribati", "Korea, Democratic People's Republic of", "Korea, Republic of", "Kuwait", "Kyrgyzstan", "Lao, People's Democratic Republic", "Latvia", "Lebanon", "Lesotho", "Liberia", "Libyan Arab Jamahiriya", "Liechtenstein", "Lithuania", "Luxembourg", "Macau", "Macedonia, The Former Yugoslav Republic of", "Madagascar", "Malawi", "Malaysia", "Maldives", "Mali", "Malta", "Marshall Islands", "Martinique", "Mauritania", "Mauritius", "Mayotte", "Mexico", "Micronesia, Federated States of", "Moldova, Republic of", "Monaco", "Mongolia", "Montserrat", "Morocco", "Mozambique", "Myanmar", "Namibia", "Nauru", "Nepal", "Netherlands", "Netherlands Antilles", "New Caledonia", "New Zealand", "Nicaragua", "Niger", "Nigeria", "Niue", "Norfolk Island", "Northern Mariana Islands", "Norway", "Oman", "Pakistan", "Palau", "Panama", "Papua New Guinea", "Paraguay", "Peru", "Philippines", "Pitcairn", "Poland", "Portugal", "Puerto Rico", "Qatar", "Reunion", "Romania", "Russian Federation", "Rwanda", "Saint Kitts and Nevis", "Saint Lucia", "Saint Vincent and the Grenadines", "Samoa", "San Marino", "Sao Tome and Principe", "Saudi Arabia", "Senegal", "Seychelles", "Sierra Leone", "Singapore", "Slovakia (Slovak Republic)", "Slovenia", "Solomon Islands", "Somalia", "South Africa", "South Georgia and the South Sandwich Islands", "Spain", "Sri Lanka", "St. Helena", "St. Pierre and Miquelon", "Sudan", "Suriname", "Svalbard and Jan Mayen Islands", "Swaziland", "Sweden", "Switzerland", "Syrian Arab Republic", "Taiwan, Province of China", "Tajikistan", "Tanzania, United Republic of", "Thailand", "Togo", "Tokelau", "Tonga", "Trinidad and Tobago", "Tunisia", "Turkey", "Turkmenistan", "Turks and Caicos Islands", "Tuvalu", "Uganda", "Ukraine", "United Arab Emirates", "United Kingdom", "United States", "United States Minor Outlying Islands", "Uruguay", "Uzbekistan", "Vanuatu", "Venezuela", "Vietnam", "Virgin Islands (British)", "Virgin Islands (U.S.)", "Wallis and Futuna Islands", "Western Sahara", "Yemen", "Yugoslavia", "Zambia", "Zimbabwe"];
+
+
     return Scaffold(
       appBar: AppBar(
         title: Text('Flutter FormBuilder Example'),
@@ -77,8 +57,10 @@ class MyHomePage extends StatelessWidget {
               label: 'Chips',
               attribute: 'chips_test',
               require: true,
-              value: [AppProfile('Stock Man', '[email protected]',
-                  'https://d2gg9evh47fn9z.cloudfront.net/800px_COLOURBOX4057996.jpg')],
+              value: [
+                AppProfile('Stock Man', '[email protected]',
+                    'https://d2gg9evh47fn9z.cloudfront.net/800px_COLOURBOX4057996.jpg')
+              ],
               suggestionsCallback: (String query) {
                 if (query.length != 0) {
                   return mockResults.where((profile) {
@@ -102,7 +84,7 @@ class MyHomePage extends StatelessWidget {
               },
               suggestionBuilder: (context, state, profile) {
                 return ListTile(
-                  key: ObjectKey(profile),
+                  // key: ObjectKey(profile),
                   leading: CircleAvatar(
                     backgroundImage: NetworkImage(profile.imageUrl),
                   ),
@@ -112,6 +94,25 @@ class MyHomePage extends StatelessWidget {
                 );
               },
             ),
+            FormBuilderInput.typeAhead(
+              label: 'Country',
+              attribute: 'country',
+              require: true,
+              itemBuilder: (context, country) {
+                return ListTile(
+                  title: Text(country),
+                );
+              },
+              suggestionsCallback: (query) {
+                if (query.length != 0) {
+                  return allCountries.where((country) {
+                    return country.toLowerCase().contains(query.toLowerCase());
+                  }).toList(growable: false);
+                } else {
+                  return allCountries;
+                }
+              },
+            ),
             FormBuilderInput.textField(
               type: FormBuilderInput.TYPE_TEXT,
               attribute: "name",
@@ -186,15 +187,11 @@ class MyHomePage extends StatelessWidget {
               label: "My Best Language",
               attribute: "best_language",
               require: true,
-              options: [
-                FormBuilderInputOption(value: "Dart"),
-                FormBuilderInputOption(value: "Kotlin"),
-                FormBuilderInputOption(value: "Java"),
-                FormBuilderInputOption(value: "Swift"),
-                FormBuilderInputOption(value: "Objective-C"),
-              ],
+              options: ["Dart", "Kotlin", "Java", "Swift", "Objective-C"]
+                  .map((lang) => FormBuilderInputOption(value: lang))
+                  .toList(growable: false),
             ),
-            /*FormBuilderInput.checkbox(
+            FormBuilderInput.checkbox(
                 label: "I accept the terms and conditions",
                 attribute: "accept_terms",
                 hint:
@@ -239,39 +236,10 @@ class MyHomePage extends StatelessWidget {
               label: "Movie Rating (Archer)",
               attribute: "movie_rating",
               require: true,
-              options: [
-                FormBuilderInputOption(
-                  value: 1,
-                ),
-                FormBuilderInputOption(
-                  value: 2,
-                ),
-                FormBuilderInputOption(
-                  value: 3,
-                ),
-                FormBuilderInputOption(
-                  value: 4,
-                ),
-                FormBuilderInputOption(
-                  value: 5,
-                ),
-                FormBuilderInputOption(
-                  value: 6,
-                ),
-                FormBuilderInputOption(
-                  value: 7,
-                ),
-                FormBuilderInputOption(
-                  value: 8,
-                ),
-                FormBuilderInputOption(
-                  value: 9,
-                ),
-                FormBuilderInputOption(
-                  value: 10,
-                ),
-              ],
-            ),*/
+              options: List.generate(5, (i) => i + 1)
+                  .map((number) => FormBuilderInputOption(value: number))
+                  .toList(),
+            ),
           ],
           onChanged: () {
             print("Form value changed");
@@ -288,3 +256,26 @@ class MyHomePage extends StatelessWidget {
     );
   }
 }
+
+class AppProfile {
+  final String name;
+  final String email;
+  final String imageUrl;
+
+  const AppProfile(this.name, this.email, this.imageUrl);
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is AppProfile &&
+          runtimeType == other.runtimeType &&
+          name == other.name;
+
+  @override
+  int get hashCode => name.hashCode;
+
+  @override
+  String toString() {
+    return name;
+  }
+}