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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.";
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 = '/selection-controls';
@override
_SelectionControlsDemoState createState() => new _SelectionControlsDemoState();
}
class _SelectionControlsDemoState extends State<SelectionControlsDemo> {
@override
Widget build(BuildContext context) {
List<ComponentDemoTabData> demos = <ComponentDemoTabData>[
new ComponentDemoTabData(
tabName: "CHECKBOX",
description: _checkboxText,
widget: buildCheckbox(),
exampleCodeTag: _checkboxCode
),
new ComponentDemoTabData(
tabName: "RADIO",
description: _radioText,
widget: buildRadio(),
exampleCodeTag: _radioCode
),
new ComponentDemoTabData(
tabName: "SWITCH",
description: _switchText,
widget: buildSwitch(),
exampleCodeTag: _switchCode
)
];
return new TabbedComponentDemoScaffold(
title: 'Selection controls',
demos: demos
);
}
bool checkboxValueA = true;
bool checkboxValueB = false;
int radioValue = 0;
bool switchValue = false;
void handleRadioValueChanged(int value) {
setState(() {
radioValue = value;
});
}
Widget buildCheckbox() {
return new Align(
alignment: new FractionalOffset(0.5, 0.4),
child: new Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new Checkbox(value: checkboxValueA, onChanged: (bool value) {
setState(() {
checkboxValueA = value;
});
}),
new Checkbox(value: checkboxValueB, onChanged: (bool value) {
setState(() {
checkboxValueB = value;
});
})
]
),
new Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
// Disabled checkboxes
new Checkbox(value: true, onChanged: null),
new Checkbox(value: false, onChanged: null)
]
)
]
)
);
}
Widget buildRadio() {
return new Align(
alignment: new FractionalOffset(0.5, 0.4),
child: new Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new Radio<int>(
value: 0,
groupValue: radioValue,
onChanged: handleRadioValueChanged
),
new Radio<int>(
value: 1,
groupValue: radioValue,
onChanged: handleRadioValueChanged
),
new Radio<int>(
value: 2,
groupValue: radioValue,
onChanged: handleRadioValueChanged
)
]
),
// Disabled radio buttons
new Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new Radio<int>(
value: 0,
groupValue: 0,
onChanged: null
),
new Radio<int>(
value: 1,
groupValue: 0,
onChanged: null
),
new Radio<int>(
value: 2,
groupValue: 0,
onChanged: null
)
]
)
]
)
);
}
Widget buildSwitch() {
return new Align(
alignment: new FractionalOffset(0.5, 0.4),
child: new Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new Switch(
value: switchValue,
onChanged: (bool value) {
setState(() {
switchValue = value;
});
}
),
// Disabled switches
new Switch(value: true, onChanged: null),
new Switch(value: false, onChanged: null)
]
)
);
}
}