Card Settings
NOTE: THIS IS EFFECTIVELY NULLSAFE BUT CANNOT REFLECT THIS UNTIL cupertino_settings IS UPGRADED.
A flutter package for building settings forms. This includes a library of pre-built form field widgets. It supports both Material and Cupertino style.
This package consists of a CardSettings layout wrapper and a series of form field options including:
- Text Fields
CardSettingsText- Basic text fieldCardSettingsParagraph- Multiline text field with a counterCardSettingsEmail- A text field pre-configured for email inputCardSettingsPassword- A text field pre-configured for passwordsCardSettingsPhone- A masked phone entry field (US style currently)
- Numeric Fields
CardSettingsDouble- Field for double precision numbersCardSettingsInt- Field for integer numbersCardSettingsCurrency- Field for currency entryCardSettingsSwitch- Field for boolean state
- Pickers
CardSettingsListPicker- Picker list of arbitrary optionsCardSettingsNumberPicker- Picker list of numbers in a given rangeCardSettingsRadioPicker- Single items picker with radio buttonsCardSettingsSelectionPicker- Single selection from a list with optional iconsCardSettingsCheckboxPicker- Select multiples from a list of available optionsCardSettingsColorPicker- Picker for colors with three flavors: RGB, Material, and BlockCardSettingsDatePicker- Date PickerCardSettingsTimePicker- Time PickerCardSettingsDateTimePicker- Combo Date and Time PickerCardSettingsFilePicker- Upload a file from the device
- Informational Sections
CardSettingsHeader- A control to put a header between form sectionsCardSettingsInstructions- Informational read-only text
- Actions
CardSettingsButton- Actions buttons for the form
All fields support validate, onChange, onSaved, autovalidate, and visible.
The package also includes these additonal items:
- CardSettingsField - The base layout widget. You can use this to build custom fields
- Converters - a set of utility functions to assist in converting data into and out of the fields
Simple Example
All fields in this package are compatible with the standard Flutter Form widget. Simply wrap the CardSettings control in a form and use it as you normally would with the form functionality.
String title = "Spheria";
String author = "Cody Leet";
String url = "http://www.codyleet.com/spheria";
final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
@override
Widget build(BuildContext context) {
body: Form(
key: _formKey,
child: CardSettings(
children: <CardSettingsSection>[
CardSettingsSection(
header: CardSettingsHeader(
label: 'Favorite Book',
),
children: <CardSettingsWidget>[
CardSettingsText(
label: 'Title',
initialValue: title,
validator: (value) {
if (value == null || value.isEmpty) return 'Title is required.';
},
onSaved: (value) => title = value,
),
CardSettingsText(
label: 'URL',
initialValue: url,
validator: (value) {
if (!value.startsWith('http:')) return 'Must be a valid website.';
},
onSaved: (value) => url = value,
),
],
),
),
),
),
);
}
If you would like separate cards for each section, then use the .sectioned constructor:
child: CardSettings.sectioned(
...
),
See the full demo example here.
Theming
The style of the widgets can be either Material or Cupertino. There is a toggle on the CardSettings widget to globally change the style:
return CardSettings(
showMaterialonIOS: true, // default is false
);
This also exists on each field widget, in case you want to control this more granularly.
If you are using the Material design style, then the MaterialApp theme takes effect. This example shows what global theme values to set to determine how the various elements appear.
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Card Settings Example',
home: new HomePage(),
theme: ThemeData(
primaryColor: Colors.teal, // app header background
secondaryHeaderColor: Colors.indigo[400], // card header background
cardColor: Colors.white, // card field background
backgroundColor: Colors.indigo[100], // app background color
buttonColor: Colors.lightBlueAccent[100], // button background color
textTheme: TextTheme(
button: TextStyle(color: Colors.deepPurple[900]), // button text
subtitle1: TextStyle(color: Colors.grey[800]), // input text
headline6: TextStyle(color: Colors.white), // card header text
),
primaryTextTheme: TextTheme(
headline6: TextStyle(color: Colors.lightBlue[50]), // app header text
),
inputDecorationTheme: InputDecorationTheme(
labelStyle: TextStyle(color: Colors.indigo[400]), // style for labels
),
),
);
}
}
Or if you want to apply a different theme to the CardSettings hierarchy only, you can wrap it in a Theme widget like so:
Theme(
data: Theme.of(context).copyWith(
primaryTextTheme: TextTheme(
headline6: TextStyle(color: Colors.lightBlue[50]), // app header text
),
inputDecorationTheme: InputDecorationTheme(
labelStyle: TextStyle(color: Colors.deepPurple), // style for labels
),
),
child: CardSettings(
...
),
)
Please see https://pub.dev/packages/flutter_material_pickers#-readme-tab- for information on how to theme the dialog popups.
Card Style
By default, in Material mode, the content is inside a Card or Cards (if sectioned).
If you would rather just have a flat style with no border, set cardless to false.
return CardSettings(
cardless: true; // default is false
);
This has no effect in Cupertino mode, as that doesn't have a card to begin with.
You can also change the actual card styleing through the theme for example:
cardTheme: CardTheme(
shape: RoundedRectangleBorder(
side: BorderSide(width: 2, color: Colors.orange),
borderRadius: BorderRadius.circular(20),
),
),
Global Properties
The CardSettings widget implements a few global settings that all child fields can inherit. Currently it supports only label customization.
Labels
You can control how the labels are rendered with four properties:
CardSettings(
labelAlign: TextAlign.right, // change the label alignment
labelWidth: 120.0, // change how wide the label portion is
labelSuffix: ':', // add an optional tag after the label
labelPadding: 10.0, // control the spacing between the label and the content
contentAlign: TextAlign.left, // alignment of the entry widgets
icon: Icon(Icons.person), // puts and option icon to the left of the label
requiredIndicator: Text('*', style: TextStyle(color: Colors.red)), // puts an optional indicator to the right of the label
)
The labelAlign and contentAlign properties are also available on each field, so you can override the global setting for individual fields.
CardSettingsText(
label: 'Last Name',
labelAlign: TextAlign.left,
contentAlign: TextAlign.right,
)
Headers
CardSettingsHeader provides properties to set the color, height, and label alignment. However, if you wish to completely override the default header style and replace it with something custom, you can use the child property to pass in your own widget tree:
header: CardSettingsHeader(
child: Container(
height: 80,
child: Row(
children: [
Expanded(child: Divider(color: Colors.purple, thickness: 5)),
Text('Custom Header', style: TextStyle(fontSize: 20)),
Expanded(child: Divider(color: Colors.purple, thickness: 5)),
],
),
),
),
Dynamic Visibility
Each field implements a visible property that you can use to control the visibility based on the value of other fields. In this example, the switch field controls the visibility of the text field:
bool _ateOut = false;
CardSettingsSwitch(
label: 'Ate out?',
initialValue: _ateOut,
onChanged: (value) => setState(() => _ateOut = value),
),
CardSettingsText(
label: 'Restaurant',
visible: _ateOut,
),
Masking
The CardSettingsText widget has an inputMask property that forces entered text to conform to a given pattern. This is built upon the flutter_masked_text package and as such masks are formatted with the following characters:
- 0: accept numbers
- A: accept letters
- @: accept numbers and letters
- *: accept any character
So for example, phone number would be '(000) 000-0000'.
Note: CardSettingsPhone is a convenience widget that is pre-configured to use this pattern.
Caution: flutter_masked_text is a controller and as such, you will not be able to use an inputMask and a custom controller at the same time. This might be rectified in the future.
Orientation
This suite allows for orientation switching. To configure this, build different layouts depending on the orientation provided by MediaQuery.
You might want to have different fields in each layout, or a different field order. So that Flutter doesn't get confused tracking state under this circumstance, you must provide a unique state key for each individual field, using the same key in each layout.
@override
Widget build(BuildContext context) {
final GlobalKey<FormState> _emailKey = GlobalKey<FormState>();
var orientation = MediaQuery.of(context).orientation;
return Form
key: _formKey,(
child: (orientation == Orientation.portraitUp)
? CardSettings(children: <Widget>[
// Portrait layout here
CardSettingsEmail(key: _emailKey)
])
: CardSettings(children: <Widget>[
// Landscape layout here
CardSettingsEmail(key: _emailKey)
]);
},
);
}
You may have multiple fields on the same row in landscape orientation. This normally requires the use of container widgets to provide the layout inside the row. Instead, you can use the CardFieldLayout helper widget to streamline this. It will by default make it's children equally spaced, but you can provide an array of flex values to control the relative sizes.
// equally spaced example
CardSettings(
children: <Widget>[
CardFieldLayout(children: <Widget>[
CardSettingsEmail(),
CardSettingsPassword(),
]),
],
);
// relative width example
CardSettings(
children: <Widget>[
CardFieldLayout_FractionallySpaced(
children: <Widget>[
CardSettingsEmail(),
CardSettingsPassword(),
],
flexValues: [2, 1], // 66% and 33% widths
),
],
);
Custom Fields
The CardSettingsField is the basis of all other fields and can be used to build unique fields outside of this library. Its purpose is to govern layout with consistent decorations. The best way to make a custom field is to inherit from FormField<T>, which will manage the state of your field. The cleanest example of this is the CardSettingsSwitch widget. All you have to do is provide your custom widgets in the content property.
Custom Widgets
If you wish to provide a custom widget that is not a field type layout, you need to implement the CardSettingsWidget interface as so:
class CardSettingsHeader extends StatelessWidget implements CardSettingsWidget {
...
}
Screenshots
| Material | Cupertino |
|---|---|
 |
 |
| :-------------------------: | :-------------------------: |
 |
 |
| :-------------------------: | :-------------------------: |
 |
 |
Dependencies
This widget set relies on these external third-party components:
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.
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