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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/material.dart';
import '../../gallery/demo.dart';
const String _checkboxText =
'Checkboxes allow the user to select multiple options from a set. '
'A normal checkbox\'s value is true or false and a tristate checkbox\'s '
'value can also be null.';
const String _checkboxCode = 'selectioncontrols_checkbox';
const String _radioText =
'Radio buttons allow the user to select one option from a set. Use radio '
'buttons for exclusive selection if you think that the user needs to see '
'all available options side-by-side.';
const String _radioCode = 'selectioncontrols_radio';
const String _switchText =
'On/off switches toggle the state of a single settings option. The option '
'that the switch controls, as well as the state it’s in, should be made '
'clear from the corresponding inline label.';
const String _switchCode = 'selectioncontrols_switch';
class SelectionControlsDemo extends StatefulWidget {
static const String routeName = '/material/selection-controls';
@override
_SelectionControlsDemoState createState() => _SelectionControlsDemoState();
}
class _SelectionControlsDemoState extends State<SelectionControlsDemo> {
@override
Widget build(BuildContext context) {
final List<ComponentDemoTabData> demos = <ComponentDemoTabData>[
ComponentDemoTabData(
tabName: 'CHECKBOX',
description: _checkboxText,
demoWidget: buildCheckbox(),
exampleCodeTag: _checkboxCode,
documentationUrl: 'https://docs.flutter.io/flutter/material/Checkbox-class.html',
),
ComponentDemoTabData(
tabName: 'RADIO',
description: _radioText,
demoWidget: buildRadio(),
exampleCodeTag: _radioCode,
documentationUrl: 'https://docs.flutter.io/flutter/material/Radio-class.html',
),
ComponentDemoTabData(
tabName: 'SWITCH',
description: _switchText,
demoWidget: buildSwitch(),
exampleCodeTag: _switchCode,
documentationUrl: 'https://docs.flutter.io/flutter/material/Switch-class.html',
)
];
return TabbedComponentDemoScaffold(
title: 'Selection controls',
demos: demos
);
}
bool checkboxValueA = true;
bool checkboxValueB = false;
bool checkboxValueC;
int radioValue = 0;
bool switchValue = false;
void handleRadioValueChanged(int value) {
setState(() {
radioValue = value;
});
}
Widget buildCheckbox() {
return Align(
alignment: const Alignment(0.0, -0.2),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Checkbox(
value: checkboxValueA,
onChanged: (bool value) {
setState(() {
checkboxValueA = value;
});
},
),
Checkbox(
value: checkboxValueB,
onChanged: (bool value) {
setState(() {
checkboxValueB = value;
});
},
),
Checkbox(
value: checkboxValueC,
tristate: true,
onChanged: (bool value) {
setState(() {
checkboxValueC = value;
});
},
),
],
),
Row(
mainAxisSize: MainAxisSize.min,
children: const <Widget>[
// Disabled checkboxes
Checkbox(value: true, onChanged: null),
Checkbox(value: false, onChanged: null),
Checkbox(value: null, tristate: true, onChanged: null),
]
)
]
)
);
}
Widget buildRadio() {
return Align(
alignment: const Alignment(0.0, -0.2),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Radio<int>(
value: 0,
groupValue: radioValue,
onChanged: handleRadioValueChanged
),
Radio<int>(
value: 1,
groupValue: radioValue,
onChanged: handleRadioValueChanged
),
Radio<int>(
value: 2,
groupValue: radioValue,
onChanged: handleRadioValueChanged
)
]
),
// Disabled radio buttons
Row(
mainAxisSize: MainAxisSize.min,
children: const <Widget>[
Radio<int>(
value: 0,
groupValue: 0,
onChanged: null
),
Radio<int>(
value: 1,
groupValue: 0,
onChanged: null
),
Radio<int>(
value: 2,
groupValue: 0,
onChanged: null
)
]
)
]
)
);
}
Widget buildSwitch() {
return Align(
alignment: const Alignment(0.0, -0.2),
child: Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Switch.adaptive(
value: switchValue,
onChanged: (bool value) {
setState(() {
switchValue = value;
});
}
),
// Disabled switches
const Switch.adaptive(value: true, onChanged: null),
const Switch.adaptive(value: false, onChanged: null),
],
),
);
}
}