verification_code_builder

Description:

verification code builder

verification_code_builder #
Infinitely customizable widget for creating code input forms.
Inspired by flutter_verification_code
Features #

Ability to define cell widgets using the builder callback. Only you have complete control over the behavior and look of your cells!
Built in paste action support.
Backspace press tracking. Especially useful if you don't like the extra "clear all" button.
Automatic focus control. You don't need to define the focus switching logic yourself. All you need to do in your cell widgets is to call the focus.nextFocus() when the input to the current field is complete - verification_code_builder will take care of the rest.

WIP #

Support for derived number of characters in cells
Cells RegExp and onError callback support
isEditing flag
getCurrentIndex method
Logo

Usage #

Import the library:

import 'package:verification_code_builder/verification_code_builder.dart';
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Use VerificationCode wherever you want:

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('VerificationCode'),
),
body: Center(
child: VerificationCode(
length: 6, // Set the number of cells
onCompleted: (String value) {
print("Code is $value"); // Set a callback for the result
},
builder: (index, focus, textEditingController, pasteMethod) { // Construct your cell widget
return _generateSingleDigit(index, focus, textEditingController, pasteMethod);
},
),
)
);
}

Widget _generateSingleDigit(
int index, // Cell index in VerificationCode widget
FocusNode focus, // Focus for "this" cell. VerificationCode use it to manage focus of cells
TextEditingController textEditingController, // Cell input handler
PasteMethod pasteMethod // Paste mechanism. Use it for perform paste (e.g. using SelectionControls)
) {
return Container(
height: 48,
width: 48,
margin: EdgeInsets.only(left: 3),
decoration: BoxDecoration(
borderRadius: BorderRadius.all(Radius.circular(8)),
color: Colors.grey),
child: Center(
child: TextField( // If you build your cell based on TextField...
controller: textEditingController, // just insert textEditingController parameter here
focusNode: focus, // and focus here
autofocus: index == 0, // You can use index to perform autofocus on first cell
// Use this custom SelectionControls widget for easily "native-like" paste experience
selectionControls: VerificationSelectionControls.create(pasteMethod),
inputFormatters: [FilteringTextInputFormatter.digitsOnly, LengthLimitingTextInputFormatter(1)],
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
style: TextStyle(
color: Colors.black,
fontSize: 30,
fontWeight: FontWeight.w700,
),
onChanged: (str) => {
if (str.isNotEmpty) {
index == 5 ? FocusScope.of(context).unfocus() : focus.nextFocus()
}
},
),
),
);
}
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Showcase #

Contributing #
I will be glad to hear about your successes, ideas and problems that you have encountered while using this widget. You can contact me on Twitter and share your experience. I will also be very happy if you send me a small video or gif on which you will show what form for entering the code you got. If you find a bug, please describe it (either on GitHub, or on Twitter). Pull requests with bug fixing and improvements are strongly encouraged and I will be happy to leave a mention of your contribution in the README. I will also be glad to any spelling corrections :)