combos 1.0.0 
combos: ^1.0.0 copied to clipboard
creomobile.comCombo Widgets for Flutter.
import 'dart:math' as math;
import 'package:combos/combos.dart';
import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter/services.dart';
const _customAnimationDurationMs = 150;
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) => MaterialApp(
title: 'Combo Samples',
home: MyHomePage(),
);
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final _comboKey = GlobalKey<ComboState>();
final _awaitComboKey = GlobalKey<ComboState>();
GlobalKey<_TestPopupState> _popupKey;
GlobalKey<_TestPopupState> _awaitPopupKey;
final _offsetXController = TextEditingController(text: '0');
final _offsetYController = TextEditingController(text: '0');
final _screenPaddingHorizontalController = TextEditingController(text: '0');
final _screenPaddingVerticalController = TextEditingController(text: '0');
final _animationDurationController = TextEditingController(text: '150');
final _requiredSpaceController = TextEditingController(text: '300');
final _popupWidthController = TextEditingController(text: '300');
final _itemsCountController = TextEditingController(text: '3');
final _spaceAboveController = TextEditingController(text: '16');
final _comboWidthController = TextEditingController(text: '200');
var _position = PopupPosition.bottomMinMatch;
var _offsetX = 0;
var _offsetY = 0;
var _screenPaddingHorizontal = 0;
var _screenPaddingVertical = 0;
var _requiredSpace = 300;
var _autoClose = PopupAutoClose.tapOutsideWithChildIgnorePointer;
var _autoOpen = PopupAutoOpen.tap;
var _animation = PopupAnimation.fade;
var _animationDurationMs = 150;
var _popupWidth = 300;
var _itemsCount = 3;
var _spaceAbove = 16;
var _comboWidth = 200;
var _comboAlignment = CrossAxisAlignment.center;
String _selectorItem;
String _typeaheadItem;
@override
Widget build(BuildContext context) {
Widget buildEnumSelector<T>(String title, Iterable<T> values, T value,
void Function(T value) setValue) =>
Row(mainAxisSize: MainAxisSize.min, children: [
Text(title,
style:
TextStyle(color: Colors.grey, fontWeight: FontWeight.bold)),
const SizedBox(width: 8),
DropdownButton<T>(
items: values
.map((_) => DropdownMenuItem<T>(
value: _, child: Text(TextHelper.enumToString(_))))
.toList(),
value: value,
onChanged: (_) => setState(() => setValue(_)),
),
]);
Widget buildBoolSelector(
String title, bool value, void Function(bool value) setValue) =>
SizedBox(
width: 200,
child: CheckboxListTile(
value: value,
onChanged: (_) => setState(() => setValue(_)),
controlAffinity: ListTileControlAffinity.leading,
title: Text(title),
dense: true,
),
);
Widget buildIntSelector(TextEditingController controller, String labelText,
void Function(int value) setValue,
[enabled = true]) =>
SizedBox(
width: 200,
child: TextField(
controller: controller,
enabled: enabled,
inputFormatters: [
IntTextInputFormatter(minValue: 0, maxValue: 5000)
],
decoration: InputDecoration(labelText: labelText),
onChanged: (_) => setState(() => setValue(int.tryParse(_) ?? 0)),
),
);
Widget buildComboContainer({String title, Widget child}) =>
Row(mainAxisSize: MainAxisSize.min, children: [
SizedBox(
width: 160,
child: Text(
title,
style: const TextStyle(
color: Colors.grey, fontWeight: FontWeight.bold),
)),
child,
]);
return Scaffold(
appBar: AppBar(
title: Text('Combo Samples'),
),
body: ListView(
children: [
Column(crossAxisAlignment: CrossAxisAlignment.stretch, children: [
// properties
Padding(
padding: const EdgeInsets.all(16.0),
child: Wrap(spacing: 24, runSpacing: 16, children: [
// position
buildEnumSelector<PopupPosition>('Position:',
PopupPosition.values, _position, (_) => _position = _),
// offsetX
buildIntSelector(
_offsetXController, 'Offset X', (_) => _offsetX = _),
// offsetY
buildIntSelector(
_offsetYController, 'Offset Y', (_) => _offsetY = _),
// screen padding horizontal
buildIntSelector(
_screenPaddingHorizontalController,
'Screen Padding Horizontal',
(_) => _screenPaddingHorizontal = _),
// screen padding vertical
buildIntSelector(
_screenPaddingVerticalController,
'Screen Padding Horizontal',
(_) => _screenPaddingVertical = _),
// requiredSpace
buildIntSelector(_requiredSpaceController, 'Required Space',
(_) => _requiredSpace = _),
// auto close
buildEnumSelector<PopupAutoClose>('Auto Close:',
PopupAutoClose.values, _autoClose, (_) => _autoClose = _),
// auto open
buildEnumSelector<PopupAutoOpen>('Auto Open:',
PopupAutoOpen.values, _autoOpen, (_) => _autoOpen = _),
// animation
buildEnumSelector<PopupAnimation>('Animation:',
PopupAnimation.values, _animation, (_) => _animation = _),
// animationDuration
buildIntSelector(
_animationDurationController,
'Animation Duration (Ms)',
(_) => _animationDurationMs = _,
_animation != PopupAnimation.custom &&
_animation != PopupAnimation.none),
// popup width
buildIntSelector(_popupWidthController, 'Popup Width',
(_) => _popupWidth = _),
// items count
buildIntSelector(_itemsCountController, 'Items Count',
(_) => _itemsCount = _),
// space above
buildIntSelector(_spaceAboveController, 'Space Above',
(_) => _spaceAbove = _),
// space above
buildIntSelector(_comboWidthController, 'Combo Width',
(_) => _comboWidth = _),
// horizontalBehavior
buildEnumSelector<CrossAxisAlignment>(
'Combo Alignment:',
[
CrossAxisAlignment.start,
CrossAxisAlignment.center,
CrossAxisAlignment.end
],
_comboAlignment,
(_) => _comboAlignment = _),
// close
SizedBox(
width: 200,
child: RaisedButton(
color: Colors.blueAccent,
textColor: Colors.white,
child: Text('Close Popup'),
onPressed: Combo.closeAll),
)
]),
),
// combos
Padding(
padding: const EdgeInsets.symmetric(horizontal: 24),
child: Column(crossAxisAlignment: _comboAlignment, children: [
// space
SizedBox(
key: ValueKey(_spaceAbove), height: _spaceAbove.toDouble()),
// Combo
buildComboContainer(
title: 'Combo',
child: Material(
borderRadius: BorderRadius.circular(29),
child: Combo(
key: _comboKey,
position: _position,
offset: Offset(_offsetX.toDouble(), _offsetY.toDouble()),
requiredSpace: _requiredSpace.toDouble(),
screenPadding: EdgeInsets.symmetric(
horizontal: _screenPaddingHorizontal.toDouble(),
vertical: _screenPaddingVertical.toDouble()),
autoClose: _autoClose,
autoOpen: _autoOpen,
animation: _animation,
animationDuration:
Duration(milliseconds: _animationDurationMs),
openedChanged: (isOpened) {
if (!isOpened && _animation == PopupAnimation.custom) {
_popupKey.currentState?.animatedClose();
}
},
child: Container(
width: _comboWidth.toDouble(),
height: 58,
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [
Colors.blueAccent.withOpacity(0.2),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.2),
]),
borderRadius: BorderRadius.circular(29),
border: Border.all(color: Colors.blueAccent),
),
child: Row(
children: [
const Expanded(
child: Text('Combo Child',
textAlign: TextAlign.center,
style:
TextStyle(color: Colors.blueAccent))),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 16),
child: Icon(Icons.arrow_drop_down,
color: Colors.blueAccent),
),
],
),
),
popupBuilder: (context, mirrored) => TestPopup(
key: _popupKey = GlobalKey<_TestPopupState>(),
mirrored: mirrored,
width: _popupWidth.toDouble(),
itemsCount: _itemsCount,
onClose: () => _comboKey.currentState?.close(),
animated: _animation == PopupAnimation.custom,
radius: const Radius.circular(24)),
highlightColor: Colors.blueAccent.withOpacity(0.1),
splashColor: Colors.blueAccent.withOpacity(0.1),
hoverColor: Colors.blueAccent.withOpacity(0.1),
),
),
),
const SizedBox(height: 16),
// AwaitCombo
buildComboContainer(
title: 'AwaitCombo',
child: Material(
borderRadius: BorderRadius.circular(29),
child: Builder(builder: (context) {
final horizontal = _position == PopupPosition.left ||
_position == PopupPosition.right;
return AwaitCombo(
key: _awaitComboKey,
refreshOnOpened: true,
progressPosition: horizontal
? ProgressPosition.child
: ProgressPosition.popup,
progressDecoratorBuilder:
(context, waiting, mirrored, child) =>
ProgressDecorator(
waiting: waiting,
mirrored: mirrored,
child: child,
progressBackgroundColor:
horizontal ? Colors.transparent : null,
progressValueColor: horizontal
? AlwaysStoppedAnimation(
Colors.blueAccent.withOpacity(0.2))
: null,
progressHeight: horizontal ? null : 2.0,
),
position: _position,
offset:
Offset(_offsetX.toDouble(), _offsetY.toDouble()),
requiredSpace: _requiredSpace.toDouble(),
screenPadding: EdgeInsets.symmetric(
horizontal: _screenPaddingHorizontal.toDouble(),
vertical: _screenPaddingVertical.toDouble()),
autoClose: _autoClose,
autoOpen: _autoOpen,
animation: _animation,
animationDuration:
Duration(milliseconds: _animationDurationMs),
openedChanged: (isOpened) {
if (!isOpened &&
_animation == PopupAnimation.custom) {
_popupKey.currentState?.animatedClose();
}
},
child: Container(
width: _comboWidth.toDouble(),
height: 58,
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [
Colors.blueAccent.withOpacity(0.2),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.2),
]),
borderRadius: BorderRadius.circular(29),
border: Border.all(color: Colors.blueAccent),
),
child: Row(
children: [
const Expanded(
child: Text('AwaitCombo Child',
textAlign: TextAlign.center,
style:
TextStyle(color: Colors.blueAccent))),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 16),
child: Icon(Icons.arrow_drop_down,
color: Colors.blueAccent),
),
],
),
),
popupBuilder: (context) async {
await Future.delayed(Duration(milliseconds: 500));
return TestPopup(
key: _awaitPopupKey =
GlobalKey<_TestPopupState>(),
mirrored: false,
width: _popupWidth.toDouble(),
itemsCount: _itemsCount,
onClose: () => _comboKey.currentState?.close(),
animated: _animation == PopupAnimation.custom,
radius: const Radius.circular(24));
},
highlightColor: Colors.blueAccent.withOpacity(0.1),
splashColor: Colors.blueAccent.withOpacity(0.1),
hoverColor: Colors.blueAccent.withOpacity(0.1),
);
}),
),
),
const SizedBox(height: 16),
// ListCombo
buildComboContainer(
title: 'ListCombo',
child: Material(
borderRadius: BorderRadius.circular(29),
child: Builder(builder: (context) {
final horizontal = _position == PopupPosition.left ||
_position == PopupPosition.right;
return ListCombo<String>(
getList: () async {
await Future.delayed(Duration(milliseconds: 500));
return Iterable.generate(_itemsCount)
.map((_) => 'Item ${_ + 1}')
.toList();
},
itemBuilder: (context, item) =>
ListTile(title: Text(item)),
onItemTapped: (item) {
final dialog =
AlertDialog(content: Text('$item tapped!'));
showDialog(context: context, builder: (_) => dialog);
},
popupBuilder: _position == PopupPosition.bottomMatch ||
_position == PopupPosition.topMatch
? null
: (context, list, itemBuilder, onItemTapped,
mirrored, getIsSelectable) =>
ListPopup<String>(
list: list,
itemBuilder: itemBuilder,
onItemTapped: onItemTapped,
width: 300,
getIsSelectable: getIsSelectable),
refreshOnOpened: true,
progressPosition: horizontal
? ProgressPosition.child
: ProgressPosition.popup,
progressDecoratorBuilder:
(context, waiting, mirrored, child) =>
ProgressDecorator(
waiting: waiting,
mirrored: mirrored,
child: child,
progressBackgroundColor:
horizontal ? Colors.transparent : null,
progressValueColor: horizontal
? AlwaysStoppedAnimation(
Colors.blueAccent.withOpacity(0.2))
: null,
progressHeight: horizontal ? null : 2.0,
),
position: _position,
offset:
Offset(_offsetX.toDouble(), _offsetY.toDouble()),
requiredSpace: _requiredSpace.toDouble(),
screenPadding: EdgeInsets.symmetric(
horizontal: _screenPaddingHorizontal.toDouble(),
vertical: _screenPaddingVertical.toDouble()),
autoClose: _autoClose,
autoOpen: _autoOpen,
animation: _animation,
animationDuration:
Duration(milliseconds: _animationDurationMs),
openedChanged: (isOpened) {
if (!isOpened &&
_animation == PopupAnimation.custom) {
_popupKey.currentState?.animatedClose();
}
},
child: Container(
width: _comboWidth.toDouble(),
height: 58,
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [
Colors.blueAccent.withOpacity(0.2),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.2),
]),
borderRadius: BorderRadius.circular(29),
border: Border.all(color: Colors.blueAccent),
),
child: Row(
children: [
const Expanded(
child: Text('ListCombo Child',
textAlign: TextAlign.center,
style:
TextStyle(color: Colors.blueAccent))),
const Padding(
padding: EdgeInsets.symmetric(horizontal: 16),
child: Icon(Icons.arrow_drop_down,
color: Colors.blueAccent),
),
],
),
),
highlightColor: Colors.blueAccent.withOpacity(0.1),
splashColor: Colors.blueAccent.withOpacity(0.1),
hoverColor: Colors.blueAccent.withOpacity(0.1),
);
}),
),
),
const SizedBox(height: 16),
// ListCombo
buildComboContainer(
title: 'SelectorCombo',
child: Container(
width: _comboWidth.toDouble(),
height: 58,
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [
Colors.blueAccent.withOpacity(0.2),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.2),
]),
borderRadius: BorderRadius.circular(29),
border: Border.all(color: Colors.blueAccent),
),
child: Material(
color: Colors.transparent,
borderRadius: BorderRadius.circular(29),
child: Builder(builder: (context) {
final horizontal = _position == PopupPosition.left ||
_position == PopupPosition.right;
return SelectorCombo<String>(
selected: _selectorItem,
childBuilder: (context, item) => item == null
? const Center(
child: Text('<None>',
style: TextStyle(color: Colors.grey)),
)
: ListTile(
title: Text(item,
style: const TextStyle(
color: Colors.blueAccent)),
),
getList: () async {
await Future.delayed(Duration(milliseconds: 500));
return Iterable.generate(_itemsCount)
.map((_) => 'Item ${_ + 1}')
.toList();
},
itemBuilder: (context, item) =>
ListTile(title: Text(item ?? '')),
onItemTapped: (item) =>
setState(() => _selectorItem = item),
popupBuilder:
_position == PopupPosition.bottomMatch ||
_position == PopupPosition.topMatch
? null
: (context, list, itemBuilder, onItemTapped,
mirrored, getIsSelectable) =>
ListPopup<String>(
list: list,
itemBuilder: itemBuilder,
onItemTapped: onItemTapped,
width: 300,
getIsSelectable: getIsSelectable),
refreshOnOpened: true,
progressPosition: horizontal
? ProgressPosition.child
: ProgressPosition.popup,
progressDecoratorBuilder:
(context, waiting, mirrored, child) =>
ProgressDecorator(
waiting: waiting,
mirrored: mirrored,
child: child,
progressBackgroundColor:
horizontal ? Colors.transparent : null,
progressValueColor: horizontal
? AlwaysStoppedAnimation(
Colors.blueAccent.withOpacity(0.2))
: null,
progressHeight: horizontal ? null : 2.0,
),
position: _position,
offset:
Offset(_offsetX.toDouble(), _offsetY.toDouble()),
requiredSpace: _requiredSpace.toDouble(),
screenPadding: EdgeInsets.symmetric(
horizontal: _screenPaddingHorizontal.toDouble(),
vertical: _screenPaddingVertical.toDouble()),
autoClose: _autoClose,
autoOpen: _autoOpen,
animation: _animation,
animationDuration:
Duration(milliseconds: _animationDurationMs),
openedChanged: (isOpened) {
if (!isOpened &&
_animation == PopupAnimation.custom) {
_popupKey.currentState?.animatedClose();
}
},
highlightColor: Colors.blueAccent.withOpacity(0.1),
splashColor: Colors.blueAccent.withOpacity(0.1),
hoverColor: Colors.blueAccent.withOpacity(0.1),
);
}),
),
),
),
const SizedBox(height: 16),
// TypeaheadCombo
buildComboContainer(
title: 'TypeaheadCombo',
child: Container(
width: _comboWidth.toDouble(),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(29),
gradient: LinearGradient(
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
colors: [
Colors.blueAccent.withOpacity(0.2),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.0),
Colors.blueAccent.withOpacity(0.2),
]),
),
child: Builder(builder: (context) {
final horizontal = _position == PopupPosition.left ||
_position == PopupPosition.right;
return TypeaheadCombo<String>(
selected: _typeaheadItem,
onItemTapped: (_) => setState(() => _typeaheadItem = _),
getList: (text) async {
await Future.delayed(Duration(seconds: 1));
return [
'Item1',
'Item2',
'Item3',
'Item4',
'Item5',
'Item6',
'Item7',
];
},
itemBuilder: (context, item) => ListTile(
selected: item == _typeaheadItem,
title: Text(item)),
getItemText: (item) => item,
//minTextLength: 0,
//popupWidth: _popupWidth.toDouble(),
//popupMaxHeight: _popupHeight.toDouble(),
decoration: InputDecoration(
labelText: 'Sample Typeahead',
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(29),
borderSide: BorderSide(color: Colors.blueAccent),
),
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(29),
borderSide: BorderSide(color: Colors.blueAccent),
),
labelStyle: TextStyle(color: Colors.blueAccent),
),
popupBuilder: _position == PopupPosition.bottomMatch ||
_position == PopupPosition.topMatch
? null
: (context, list, itemBuilder, onItemTapped,
mirrored, getIsSelectable) =>
ListPopup<String>(
list: list,
itemBuilder: itemBuilder,
onItemTapped: onItemTapped,
width: 300,
getIsSelectable: getIsSelectable),
progressPosition: horizontal
? ProgressPosition.child
: ProgressPosition.popup,
progressDecoratorBuilder:
(context, waiting, mirrored, child) =>
ProgressDecorator(
waiting: waiting,
mirrored: mirrored,
child: child,
progressBackgroundColor:
horizontal ? Colors.transparent : null,
progressValueColor: horizontal
? AlwaysStoppedAnimation(
Colors.blueAccent.withOpacity(0.2))
: null,
progressHeight: horizontal ? null : 2.0,
),
position: _position,
offset:
Offset(_offsetX.toDouble(), _offsetY.toDouble()),
requiredSpace: _requiredSpace.toDouble(),
screenPadding: EdgeInsets.symmetric(
horizontal: _screenPaddingHorizontal.toDouble(),
vertical: _screenPaddingVertical.toDouble()),
animation: _animation,
animationDuration:
Duration(milliseconds: _animationDurationMs),
);
}),
),
),
const SizedBox(height: 16),
// MenuItemCombo
buildComboContainer(
title: 'MenuItemCombo',
child: SizedBox(
width: _comboWidth.toDouble(),
child: Row(
children: [
MenuItemCombo<String>(
item: MenuItem(
'File',
() => [
MenuItem('New'),
MenuItem.separator,
MenuItem('Open'),
MenuItem('Save'),
MenuItem('Save As...'),
MenuItem.separator,
MenuItem(
'Recent',
() => [
MenuItem('Folders', () async {
await Future.delayed(Duration(
milliseconds: 500));
return [
MenuItem('Folder 1'),
MenuItem('Folder 2'),
MenuItem('Folder 3'),
];
}),
MenuItem('Files', () async {
await Future.delayed(Duration(
milliseconds: 500));
return [
MenuItem('File 1'),
MenuItem('File 2'),
MenuItem('File 3'),
];
}),
]),
MenuItem.separator,
MenuItem('Exit'),
]),
itemBuilder: (context, item) => Padding(
padding: const EdgeInsets.all(16),
child: Text(item.item),
),
onItemTapped: (value) {
final dialog = AlertDialog(
content: Text('${value.item} tapped!'));
showDialog(
context: context, builder: (_) => dialog);
},
autoOpen: _autoOpen,
),
MenuItemCombo<String>(
item: MenuItem(
'Edit',
() => [
MenuItem('Undo'),
MenuItem('Redo'),
MenuItem.separator,
MenuItem('Cut'),
MenuItem('Copy'),
MenuItem('Paste'),
MenuItem.separator,
MenuItem('Find'),
]),
itemBuilder: (context, item) => Padding(
padding: const EdgeInsets.all(16),
child: item.item == 'Edit'
? Text(item.item)
: ConstrainedBox(
constraints: BoxConstraints(minWidth: 80),
child: Text(item.item)),
),
onItemTapped: (value) {
final dialog = AlertDialog(
content: Text('${value.item} tapped!'));
showDialog(
context: context, builder: (_) => dialog);
},
autoOpen: _autoOpen,
),
],
),
)),
]),
),
const SizedBox(height: 800),
])
],
),
);
}
}
class TestPopup extends StatefulWidget {
const TestPopup({
Key key,
@required this.mirrored,
@required this.width,
@required this.itemsCount,
@required this.onClose,
@required this.animated,
this.radius = Radius.zero,
}) : super(key: key);
final bool mirrored;
final double width;
final int itemsCount;
final VoidCallback onClose;
final bool animated;
final Radius radius;
@override
_TestPopupState createState() => _TestPopupState(width, itemsCount);
}
class _TestPopupState extends State<TestPopup>
with SingleTickerProviderStateMixin {
_TestPopupState(this._width, this._itemsCount);
double _width;
final int _itemsCount;
AnimationController _controller;
void animatedClose() => _controller.animateBack(0.0);
@override
void initState() {
super.initState();
_controller = AnimationController(
duration: const Duration(milliseconds: _customAnimationDurationMs),
vsync: this,
value: widget.animated ? 0.0 : 1.0,
);
_controller.animateTo(1.0);
}
@override
Widget build(BuildContext context) {
final close = Ink(
decoration: BoxDecoration(
color: Colors.blueAccent,
borderRadius: BorderRadius.only(
topLeft: !widget.mirrored ? widget.radius : Radius.zero,
topRight: !widget.mirrored ? widget.radius : Radius.zero,
bottomLeft: widget.mirrored ? widget.radius : Radius.zero,
bottomRight: widget.mirrored ? widget.radius : Radius.zero,
),
),
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
IconButton(
icon: Icon(Icons.close, color: Colors.white),
onPressed: widget.onClose,
),
],
),
);
final size = Ink(
decoration: BoxDecoration(color: Colors.blueAccent.withOpacity(0.7)),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
IconButton(
icon: Icon(Icons.remove, color: Colors.white),
onPressed: () =>
setState(() => _width = math.max(_width - 24, 108)),
),
IconButton(
icon: Icon(Icons.add, color: Colors.white),
onPressed: () => setState(() => _width += 24),
),
],
),
);
final content = Column(
children: Iterable.generate(_itemsCount)
.map((_) => ListTile(title: Text('Item ${_ + 1}'), onTap: () {}))
.toList());
return Material(
elevation: 4,
borderRadius: BorderRadius.all(widget.radius),
child: AnimatedContainer(
width: _width,
duration: const Duration(milliseconds: _customAnimationDurationMs),
decoration:
BoxDecoration(borderRadius: BorderRadius.all(widget.radius)),
child: ScaleTransition(
scale: _controller,
child: Column(children: [
if (widget.mirrored) ...[
content,
size,
close
] else ...[
close,
size,
content
],
]),
),
),
);
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
}
class IntTextInputFormatter extends TextInputFormatter {
IntTextInputFormatter({this.minValue, this.maxValue});
final int minValue;
final int maxValue;
String format(String oldValue, String newValue) {
if (newValue?.isNotEmpty != true) return '';
if (newValue.contains('-')) return oldValue;
var i = int.tryParse(newValue);
if (i == null) return oldValue;
if (minValue != null && i < minValue) i = minValue;
if (maxValue != null && i > maxValue) i = maxValue;
return i.toString();
}
@override
TextEditingValue formatEditUpdate(
TextEditingValue oldValue, TextEditingValue newValue) {
final value = format(oldValue.text, newValue.text);
return value != newValue.text
? newValue.copyWith(
text: value,
selection: TextSelection.collapsed(offset: value.length))
: newValue.copyWith(text: value);
}
}
class TextHelper {
static String _camelToWords(String value) {
final codes = value.runes
.skip(1)
.map((_) => String.fromCharCode(_))
.map((_) => _.toUpperCase() == _ ? ' $_' : _)
.expand((_) => _.runes);
return value[0].toUpperCase() + String.fromCharCodes(codes);
}
static String enumToString(dynamic value) =>
value == null ? '' : _camelToWords(value.toString().split('.')[1]);
}Metadata
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Metadata
Combo Widgets for Flutter.
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