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Description:

choice

The successor to smart_select and chips_choice with cleaner, more flexible, and composable API for creating inline or prompted choice widgets with single or multiple selection.
Features #

Cleaner, flexible, and composable API
Inline or prompted choice widget
Single or multiple choice widget
Searchable choice items with highlighted result
Specifies whether the choice selection needs to be confirmed
Use any type of choice data and load it easily, either synchronously or asynchronously
Build your own choice item that fits your needs
Groupable choice items that can be sorted
Supports leading and trailing choice items, as well as divider choice items
Use a predefined wrapped, scrollable, virtualized choice list, or build one that fits your needs
Use a predefined popup dialog, bottom sheet, new page prompt, or build one that fits your needs
Use a predefined modal header, footer, and separator, or build one that fits your needs
Use a predefined group list, group item, and group header, or build one that fits your needs
Use a predefined anchor widget or build one that fits your needs
Use a predefined widget on loading, on error, and placeholder when empty, or build one that fits your needs

Usage #
For a complete usage, please see the example.
To read more about classes and other references used by choice, see the API Reference.
Single Choice #

There are a few constructors to create a single selection choice widget:

Choice.inline
Choice.prompt
InlineChoice
InlineChoice.single
PromptedChoice
PromptedChoice.single

By default, the choice controller maintains the selection state within a List. Any constructors other than those dedicated to single choice will have a List<T> for their value and onChanged prop. If we want to use a single value of T, we can use ChoiceSingle.value adapter to fill the value prop and ChoiceSingle.onChanged adapter to fill the onChanged prop.
Here is an example of how to use the ChoiceSingle.value and ChoiceSingle.onChanged adapters
import 'package:flutter/material.dart';
import 'package:choice/choice.dart';

class InlineScrollableX extends StatefulWidget {
const InlineScrollableX({super.key});

@override
State<InlineScrollableX> createState() => _InlineScrollableXState();
}

class _InlineScrollableXState extends State<InlineScrollableX> {
List<String> choices = [
'News',
'Entertainment',
'Politics',
'Automotive',
'Sports',
'Education',
'Fashion',
'Travel',
'Food',
'Tech',
'Science',
'Arts'
];

String? selectedValue;

void setSelectedValue(String? value) {
setState(() => selectedValue = value);
}

@override
Widget build(BuildContext context) {
return Column(
children: [
Choice<String>.inline(
clearable: true,
value: ChoiceSingle.value(selectedValue),
onChanged: ChoiceSingle.onChanged(setSelectedValue),
itemCount: choices.length,
itemBuilder: (state, i) {
return ChoiceChip(
selected: state.selected(choices[i]),
onSelected: state.onSelected(choices[i]),
label: Text(choices[i]),
);
},
listBuilder: ChoiceList.createScrollable(
spacing: 10,
padding: const EdgeInsets.symmetric(
horizontal: 20,
vertical: 25,
),
),
),
InlineChoice<String>.single(
clearable: true,
value: selectedValue,
onChanged: setSelectedValue,
itemCount: choices.length,
itemBuilder: (state, i) {
return ChoiceChip(
selected: state.selected(choices[i]),
onSelected: state.onSelected(choices[i]),
label: Text(choices[i]),
);
},
listBuilder: ChoiceList.createWrapped(
spacing: 10,
runSpacing: 10,
padding: const EdgeInsets.symmetric(
horizontal: 20,
vertical: 25,
),
),
),
],
);
}
}
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Multiple Choice #

There are a few constructors to create an multiple selection choice widget:

Choice.inline
InlineChoice
InlineChoice.multiple
PromptedChoice
PromptedChoice.multiple

Inline Choice #

There are a few constructors to create an inline choice widget:

Choice.inline
InlineChoice
InlineChoice.single
InlineChoice.multiple

Prompted Choice #

There are a few constructors to create a prompted choice widget:

Choice.prompt
PromptedChoice
PromptedChoice.single
PromptedChoice.multiple

Choice Data #

Choice Item #

With Future Builder #

With Form and FormField #

TODO #

✅ Grouped choice items
❌ Sortable choice items better to do this outside
🔲 Add scroll wheel list
🔲 Add dropdown choice widget
🔲 Add chainable choice widget

Sponsoring #

If this package or any other package I created is helping you, please consider to sponsor me so that I can take time to read the issues, fix bugs, merge pull requests and add features to these packages.