GitLocker: The Coding Marketplace

Description:

flutter material pickers

Flutter Material Pickers #

A flutter package containing commonly used material design picker dialogs. Some are new, some wrap existing or built in pickers with a common dialog and access function.

It includes:

New Pickers

showMaterialScrollPicker:

Allows selection of a string via a slot machine carousel

showMaterialNumberPicker:

Allows selection of a number via a slot machine carousel

showMaterialRadioPicker:

Allows selection of a single from a radio list

showMaterialCheckboxPicker:

Allows selection of many values from a checkbox list

showMaterialSelectionPicker:

Allows selection of a single value via an icon label list

Convenience Pickers

showMaterialDatePicker:

Allows selection of a date (uses the core date picker)

showMaterialTimePicker:

Allows selection of a time (uses the core time picker)

showMaterialColorPicker:

Allows RGB selection of a color (uses the ColorPicker of flutter_colorpicker)

showMaterialPalettePicker:

Allows Material palette selection of a color (uses the MaterialPicker of flutter_colorpicker)

showMaterialSwatchPicker:

Allows selection of a color from swatches (uses the BlockPicker of flutter_colorpicker)

showMaterialFilePicker:

Allows selection of a file using the device's default picker

Dialog

showMaterialResponsiveDialog:

Extends Dialog by making it responsive to screen orientation changes

All helpers implement an onChange handler to return picked option(s).
All helpers return Future<T> with the picked option(s).
There are some breaking changes in 3.0.0 (from 2.1.1).

Pickers accept generic types passed to pickers and helpers.
There's no need to pass several lists (items, values, icons), just pass
one list of generic type objects.
A selected item of generic type is passed as selectedItem not
selectedValue to match name of items.
To convert an item to a string displayed to a user either override
toString() in generic type class or pass transformer callback which
accepts an item and returns a String. (see examples)
To provide item's icon in SelectionPicker (and alikes), pass iconizer
callback which accepts an item and returns an Icon. (see example)

Example Usage #
Empty Dialog Example #
Although not a picker, per se, the showMaterialEmptyPicker helper displays the universal material design dialog wrapper that the pickers appear in. Using this directly, however, allows any content to be injected into the content area by passing in a custon Widget as the child. This code shows the basic structure of all the helpers:

showMaterialResponsiveDialog(
context: context,
child: Center(
child: Container(
padding: EdgeInsets.all(30.0),
child: Text('Any content here.'),
style: TextStyle(
fontSize: 20.0,
fontStyle: FontStyle.italic,
),
),
),
);
copied to clipboard
Scroll Picker Example #

class StateModel {
const StateModel(this.name, this.code);
final String code;
final String name;

@override
String toString() => name;
}
static const List<StateModel> usStates = <StateModel>[
StateModel('Alabama', 'AL'),
StateModel('Alaska', 'AK'),
StateModel('Arizona', 'AZ'),
StateModel('Arkansas', 'AR'),
StateModel('California', 'CA'),
StateModel('Colorado', 'CO'),
StateModel('Connecticut', 'CT'),
...
];
StateModel selectedUsState = usStates[0];

showMaterialScrollPicker<StateModel>(
context: context,
title: 'Pick Your State',
items: usStates,
selectedItem: selectedUsState,
onChanged: (value) => setState(() => selectedUsState = value),
);
copied to clipboard
Number Picker Example #

var age = 25;

showMaterialNumberPicker(
context: context,
title: 'Pick Your Age',
maxNumber: 100,
minNumber: 14,
selectedNumber: age,
onChanged: (value) => setState(() => age = value),
);
copied to clipboard
Checkbox Picker Example #

class ToppingModel {
const ToppingModel(this.name, this.code);
final String code;
final String name;

@override
String toString() => name;
}
static const List<ToppingModel> iceCreamToppings = <ToppingModel>[
ToppingModel('Hot Fudge', 'FUDGE'),
ToppingModel('Sprinkles', 'SPRINK'),
ToppingModel('Caramel', 'CARM'),
ToppingModel('Oreos', 'OREO'),
...
];
List<ToppingModel> selectedIceCreamToppings = [
iceCreamToppings[0],
iceCreamToppings[2],
];

showMaterialCheckboxPicker<ToppingModel>(
context: context,
title: 'Pick Your Toppings',
items: iceCreamToppings,
selectedItems: selectedIceCreamToppings,
onChanged: (value) => setState(() => selectedIceCreamToppings = value),
);
copied to clipboard
Radio Picker Example #

class StateModel {
const StateModel(this.name, this.code);
final String code;
final String name;

@override
String toString() => name;
}
static const List<StateModel> usStates = <StateModel>[
StateModel('Alabama', 'AL'),
StateModel('Alaska', 'AK'),
StateModel('Arizona', 'AZ'),
StateModel('Arkansas', 'AR'),
StateModel('California', 'CA'),
StateModel('Colorado', 'CO'),
StateModel('Connecticut', 'CT'),
...
];
StateModel selectedUsState = usStates[3];

showMaterialRadioPicker<StateModel>(
context: context,
title: 'Pick Your State',
items: usStates,
selectedItem: selectedUsState,
onChanged: (value) => setState(() => selectedUsState = value),
);
copied to clipboard
Selection Picker Example #

class SpeedModel {
const SpeedModel(this.name, this.icon);
final String name;
final Icon icon;
}
// Selection Picker Model
static const List<SpeedModel> speedOptions = <SpeedModel>[
SpeedModel('Light', Icon(Icons.sort)),
SpeedModel('Ridiculous', Icon(Icons.clear_all)),
SpeedModel('Ludicrous', Icon(Icons.swap_calls)),
SpeedModel('Plaid', Icon(Icons.select_all)),
];
SpeedModel speed = speedOptions[2];

showMaterialSelectionPicker(
context: context,
title: "Starship Speed",
items: speedOptions,
selectedItem: speed,
icons: speedIcons,
transformer: (item) => item.name,
iconizer: (item) => item.icon,
onChanged: (value) => setState(() => speed = value),
);
copied to clipboard
Time Picker Example #

var time = TimeOfDay.now();

showMaterialTimePicker(
context: context,
selectedTime: time,
onChanged: (value) => setState(() => time = value),
);
copied to clipboard
Date Picker Example #

var date = DateTime.now();

showMaterialDatePicker(
context: context,
selectedDate: date,
onChanged: (value) => setState(() => date = value),
);
copied to clipboard
Color Picker Example #

Color color = Colors.red;

showMaterialColorPicker(
context: context,
selectedColor: color,
onChanged: (value) => setState(() => color = value),
);
copied to clipboard
Palette Picker Example #

Color palette = Colors.green;

showMaterialPalettePicker(
context: context,
selectedColor: palette,
onChanged: (value) => setState(() => palette = value),
);
copied to clipboard
Swatch Picker Example #

Color swatch = Colors.blue;

showMaterialSwatchPicker(
context: context,
selectedColor: swatch,
onChanged: (value) => setState(() => swatch = value),
);
copied to clipboard
Picker Model #
If you don't already have or want to build a custom object to hold selction items, this library includes a general purpose one called PickerModel that you would use like this:
static const List<PickerModel> items = <PickerModel>[
PickerModel('First', code: 1, icon: Icon(Icons.sort)),
PickerModel('Second', code: 2, icon: Icon(Icons.clear_all)),
PickerModel('Third', code: 3, icon: Icon(Icons.swap_calls)),
PickerModel('Fourth', code: 4, icon: Icon(Icons.select_all)),
];
copied to clipboard
The code and icon fields are optional.
Theming #
It is highly recommended you use Flutter's built in theme styling with primarySwatch to automatically style all controls across your entire application.
ThemeData(
primarySwatch: Colors.indigo,
)
copied to clipboard
If you desire to override the color for a given control, here is how to customize the theme:
var theme = ThemeData();
theme = theme.copyWith(
primaryColor: Colors.green, // background color of the header area
accentColor: Colors.black, // color of selected controls and button bar text
dialogBackgroundColor: Colors.green[300], // background color of the entire dialog
primaryTextTheme: theme.primaryTextTheme.copyWith(
title: theme.primaryTextTheme.title.copyWith(
color: Colors.lightGreen[50], // text color of the header area
),
),
textTheme: theme.textTheme.copyWith(
body1: theme.textTheme.body1.copyWith(
color: Colors.green[900], // text color of dialog text
),
button: theme.textTheme.button.copyWith(
color: Colors.lightGreen[50], // text color of the action bar buttons
),
),
);
copied to clipboard
The example app demonstrates switching between light and dark themes globally.
However, if for some reason you want to change colors in an individual dialog, several parameters are exposed to allow this:

showMaterialResponsiveDialog(
context: context,
headerColor: Colors.green, // background color of the header area
headerTextColor: Colors.white, // text fcolor of the header
backgroundColor: Colors.lightGreen, // background color of the entire dialog
buttonTextColor: Colors.red, // text color of the action bar buttons
child: Text('Custom dialog colors'),
);
copied to clipboard
Customization #
You can customize the text that appears in various areas of the screen. The button labels automatically localize to the native language versions of "Ok" and "Cancel", unless replacement text is provided.
showMaterialNumberPicker(
title: 'Pick Your Age',
confirmText: 'Count me in',
cancelText: 'Negatory',
);
copied to clipboard
Sizing #
To prevent dialogs from growing to full screen on larger devices (or web) two properties control the maxmium size that it will grow:
maxLongSide: 600,
maxShortSide: 400,
copied to clipboard
The sides relate to if the dialog is showing in landscape or portrait mode. If you wish larger (or smaller) dialogs you can overide these values.
Supported Platforms #

Android
iOS
Web

Dependencies #
This widget set relies on these external third-party components:

flutter_colorpicker

Changelog #
Please see the Changelog page to know what's recently changed.
Contributions #
If you find a bug or want a feature, but don't know how to fix/implement it, please fill an issue.
If you fixed a bug or implemented a new feature, please send a pull request. Please include a note about your change in CHANGELOG.md with your pull request.