form_builder 0.1.0 
form_builder: ^0.1.0 copied to clipboard
flutter form builder, used to quickly build a row-column based form
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:form_builder/form_builder.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
localizationsDelegates: [
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
GlobalCupertinoLocalizations.delegate,
],
theme: ThemeData(
backgroundColor: Colors.white,
primarySwatch: Colors.blue,
checkboxTheme: CheckboxThemeData()
.copyWith(checkColor: MaterialStateProperty.all(Colors.red)),
inputDecorationTheme: InputDecorationTheme().copyWith()),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int i = 1;
FormManagement formManagement = FormManagement();
FormManagement formManagement2 = FormManagement();
@override
void initState() {
super.initState();
WidgetsBinding.instance!.addPostFrameCallback((timeStamp) {
formManagement2.newFormFieldManagementByPosition(0, 1).focusListener =
(key, hasFocus) {
if (key == null) print('username focus changed:$hasFocus');
};
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: SingleChildScrollView(
child: Column(children: [
Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: Text(
'form1',
style: TextStyle(fontSize: 30),
),
),
Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: createForm(),
),
createButtons(),
Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: createForm2(),
),
createButtons2(),
]),
));
}
Widget createButtons() {
Wrap buttons = Wrap(
children: [
Builder(
builder: (context) {
return TextButton(
onPressed: () {
formManagement.visible = !formManagement.visible;
(context as Element).markNeedsBuild();
},
child:
Text(formManagement.visible ? 'hide form' : 'show form'));
},
),
Builder(
builder: (context) {
return TextButton(
onPressed: () {
formManagement.readOnly = !formManagement.readOnly;
(context as Element).markNeedsBuild();
},
child: Text(formManagement.readOnly
? 'set form editable'
: 'set form readonly'));
},
),
Builder(
builder: (context) {
FormFieldManagement username =
formManagement.newFormFieldManagement('username');
return TextButton(
onPressed: () {
username.visible = !username.visible;
(context as Element).markNeedsBuild();
},
child:
Text(username.visible ? 'hide username' : 'show username'));
},
),
Builder(
builder: (context) {
FormFieldManagement username =
formManagement.newFormFieldManagement('username');
return TextButton(
onPressed: () {
username.readOnly = !username.readOnly;
(context as Element).markNeedsBuild();
},
child: Text(username.readOnly
? 'set username editable'
: 'set username readonly'));
},
),
TextButton(
onPressed: () {
setState(() {});
},
child: Text('rebuild page')),
TextButton(
onPressed: () {
formManagement.validate();
formManagement.getFocusableInvalidFields().forEach((element) {
print(element.errorText);
});
},
child: Text('validate')),
TextButton(
onPressed: () {
formManagement
.newFormFieldManagement('username')
.valueFieldManagement
.validate();
},
child: Text('validate username only')),
TextButton(
onPressed: () {
formManagement.reset();
},
child: Text('reset')),
TextButton(
onPressed: () {
formManagement.newFormFieldManagement('age').focus = true;
},
child: Text('age focus')),
TextButton(
onPressed: () {
formManagement.newFormFieldManagement('username').update({
'labelText': DateTime.now().toString(),
});
},
child: Text('change username\'s label')),
TextButton(
onPressed: () {
formManagement
.newFormFieldManagement('age')
.textSelectionManagement
.setSelection(1, 1);
},
child: Text('set age\'s selection')),
TextButton(
onPressed: () {
print(formManagement.data);
},
child: Text('get form data'),
),
TextButton(
onPressed: () {
formManagement
.newFormFieldManagement('button')
.update({'label': 'new Text'});
},
child: Text('set button text'),
),
TextButton(
onPressed: () {
formManagement.formThemeData = (++i) % 2 == 0
? FormThemeData(themeData: Theme.of(context))
: FormThemeData.defaultTheme;
},
child: Text('change theme'),
),
Row(children: [
Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: Text(
'form2',
style: TextStyle(fontSize: 30),
),
),
])
],
);
return buttons;
}
static Row createRow(String key, String value) {
return Row(
children: [
Expanded(child: Text(key)),
Spacer(),
Expanded(child: Text(value))
],
);
}
Widget createForm2() {
return FormBuilder(
formManagement: formManagement2,
enableLayoutManagement: true,
)
.field(field: Label('username'), flex: 2, inline: true)
.textField(
hintText: 'username',
flex: 3,
autovalidateMode: AutovalidateMode.always,
clearable: true)
.nextLine()
.field(field: Label('password'), flex: 2, inline: true)
.textField(
controlKey: 'password',
hintText: 'password',
flex: 3,
obscureText: true,
passwordVisible: true,
clearable: true)
.nextLine()
.field(field: Label('rememberMe'), flex: 2, inline: true)
.switchInline(
controlKey: 'rememberMe',
flex: 3,
initialValue: true,
padding: EdgeInsets.symmetric(vertical: 10))
.nextLine()
.divider(padding: EdgeInsets.only(top: 10, bottom: 10))
.field(field: Label('sex'), flex: 2, inline: true)
.checkboxGroup(
items: FormBuilder.toCheckboxGroupItems(['male', 'female'],
padding: EdgeInsets.symmetric(horizontal: 4)),
inline: true,
flex: 3,
)
.nextLine()
.divider(padding: EdgeInsets.only(top: 10))
.field(field: Label('habbit'), flex: 2, inline: true)
.switchGroup(
hasSelectAllSwitch: false,
controlKey: 'habbit',
items: FormBuilder.toSwitchGroupItems(['sport', 'film', 'sleep']),
padding: EdgeInsets.only(top: 2, bottom: 2),
inline: true,
flex: 3)
.divider(padding: EdgeInsets.only(top: 10, bottom: 10))
.nextLine()
.field(field: Label('age'), flex: 2, inline: true)
.slider(
inline: true,
flex: 3,
controlKey: 'age',
max: 100,
min: 14,
padding: EdgeInsets.symmetric(horizontal: 4),
subLabelRender: (value) => Text(value.round().toString()),
)
.field(
field: Button(),
flex: 1,
inline: false,
);
}
Widget createButtons2() {
return Wrap(
children: [
TextButton(
onPressed: () {
formManagement2.newFormFieldManagementByPosition(0, 0).update({
'label': '123',
});
},
child: Text('change label at position 0,0')),
TextButton(
onPressed: () {
formManagement2
.newFormFieldManagementByPosition(0, 1)
.valueFieldManagement
.value = 'hello world';
},
child: Text('set value at position 0,1')),
Builder(
builder: (context) {
FormRowManagement row = formManagement2.newFormRowManagement(0);
return TextButton(
onPressed: () {
row.visible = !row.visible;
(context as Element).markNeedsBuild();
},
child: Text(row.visible ? 'hide first row' : 'show first row'));
},
),
TextButton(
onPressed: () {
formManagement2.newFormRowManagement(0).readOnly = true;
},
child: Text('set first row readonly')),
TextButton(
onPressed: () {
FormLayoutManagement formLayoutManagement =
formManagement2.newFormLayoutManagement();
formLayoutManagement.startEdit();
formLayoutManagement.swapRow(0, 1);
formLayoutManagement.apply();
},
child: Text('swap first row and second row')),
TextButton(
onPressed: () {
FormLayoutManagement formLayoutManagement =
formManagement2.newFormLayoutManagement();
if (!formManagement2.hasControlKey('num0')) {
formLayoutManagement.startEdit();
for (int i = 0; i <= 10; i++) {
int row = formLayoutManagement.rows - 1;
formLayoutManagement.insert(
row: row,
field: Label("new row"),
inline: true,
flex: 2,
insertRow: true);
formLayoutManagement.insert(
row: row,
inline: true,
flex: 3,
field: NumberFormField(
initialValue: i,
),
controlKey: 'num$i');
}
formLayoutManagement.apply();
}
},
child: Text('append 10 numberfield rows before apply button')),
TextButton(
onPressed: () {
FormLayoutManagement formLayoutManagement =
formManagement2.newFormLayoutManagement();
formLayoutManagement.startEdit();
int rows = formLayoutManagement.rows;
if (rows >= 2) {
formLayoutManagement.remove(rows - 2);
}
if (rows != formLayoutManagement.rows)
formLayoutManagement.apply();
else
formLayoutManagement.cancel();
},
child: Text('delete last row before apply button')),
],
);
}
Widget createForm() {
return FormBuilder(
formManagement: formManagement,
)
.textField(
controlKey: 'username',
labelText: 'username',
clearable: true,
selectAllOnFocus: true,
validator: (value) =>
value.isEmpty ? 'username can not be empty !' : null,
)
.switchInline(
controlKey: 'switch1',
onChanged: (value) => print('switch1 value changed $value'),
)
.nextLine()
.textField(
controlKey: 'password',
hintText: 'password',
obscureText: true,
passwordVisible: true,
clearable: true,
toolbarOptions: ToolbarOptions(copy: false, paste: false),
onChanged: (value) => print('password value changed $value'),
flex: 1)
.textButton(
onPressed: () {
formManagement
.newFormFieldManagement('password')
.textSelectionManagement
.selectAll();
},
label: 'button',
controlKey: 'button')
.nextLine()
.numberField(
controlKey: 'age',
hintText: 'age',
clearable: true,
flex: 3,
min: -18,
max: 99,
decimal: 0,
onChanged: (value) => print('age value changed $value'),
validator: (value) => value == null ? 'not empty' : null,
)
.checkboxGroup(
items: FormBuilder.toCheckboxGroupItems(['male', 'female']),
controlKey: 'checkbox',
split: 2,
label: 'sex',
onChanged: (value) => print('checkbox value changed $value'),
validator: (value) => value.isEmpty ? 'pls select sex' : null,
)
.checkboxGroup(
items: FormBuilder.toCheckboxGroupItems(['male', 'female']),
split: 1,
label: 'checkboxlisttile',
onChanged: (value) => print('checkbox value changed $value'),
validator: (value) => value.isEmpty ? 'pls select sex' : null,
)
.divider()
.radioGroup(
items: FormBuilder.toRadioGroupItems(['1', '2']),
controlKey: 'radio',
onChanged: (value) => print('radio value changed $value'),
label: 'single choice',
validator: (value) => value == null ? 'select one !' : null,
)
.radioGroup<String>(
split: 1,
items: FormBuilder.toRadioGroupItems(['1', '2']),
onChanged: (value) => print('radio value changed $value'),
label: 'radiolisttile',
validator: (value) => value == null ? 'select one !' : null,
)
.divider()
.nextLine()
.datetimeField(
controlKey: 'startTime',
useTime: true,
hintText: 'startTime',
onChanged: (value) => print('startTime value changed $value'),
validator: (value) => value == null ? 'not empty1' : null,
)
.datetimeField(
controlKey: 'endTime',
useTime: true,
hintText: 'endTime',
onChanged: (value) => print('endTime value changed $value'),
validator: (value) => value == null ? 'not empty2' : null,
)
.nextLine()
.textField(
controlKey: 'remark',
hintText: 'remark',
maxLines: 5,
flex: 1,
clearable: true,
onChanged: (value) => print('remark value changed $value'),
maxLength: 500)
.selector<int>(
controlKey: 'selector',
labelText: 'selector',
multi: true,
selectItemProvider: (page, params) {
RangeValues filter = params['filter'];
print(filter);
List<int> items = List<int>.generate(100, (i) => i + 1)
.where((element) =>
element >= filter.start.round() &&
element <= filter.end.round())
.toList();
return Future.delayed(Duration(seconds: 1), () {
return SelectItemPage<int>(
items.sublist((page - 1) * 20,
page * 20 > items.length ? items.length : page * 20),
items.length);
});
},
queryFormBuilder: (builder, query) {
builder
.rangeSlider(
controlKey: 'filter',
min: 1,
max: 100,
inline: true,
rangeSubLabelRender: RangeSubLabelRender(
(start) => Text(start.round().toString()),
(end) => Text(end.round().toString())))
.textButton(onPressed: query, label: 'query');
},
onSelectDialogShow: (formManagement) {
//use this formManagement to control query form on search dialog
formManagement
.newFormFieldManagement('filter')
.valueFieldManagement
.setValue(RangeValues(20, 50));
return true; //return true will set params before query
},
selectedItemLayoutType: SelectedItemLayoutType.scroll,
onChanged: (value) => print('selector value changed $value'),
validator: (value) => value.isEmpty ? 'select something !' : null)
.switchGroup(
controlKey: 'switchGroup',
label: 'switch',
onChanged: (value) => print('switchGroup value changed $value'),
validator: (value) => value.isEmpty ? 'select one pls !' : null,
selectAllPadding: EdgeInsets.only(right: 8),
items: List<SwitchGroupItem>.generate(
3,
(index) => SwitchGroupItem(index.toString(),
padding: EdgeInsets.symmetric(vertical: 4, horizontal: 8))))
.slider(
controlKey: 'slider',
min: 0,
max: 100,
label: 'age slider',
validator: (value) =>
value < 50 ? 'age slider must bigger than 50' : null,
subLabelRender: (value) => Text(value.toStringAsFixed(0)),
onChanged: (value) =>
print('age slider value changed ' + value.toStringAsFixed(0)),
)
.numberField(
controlKey: 'sliderInlineText',
min: 0,
max: 100,
labelText: 'inline slider',
flex: 2,
onChanged: (v) => formManagement
.newFormFieldManagement('sliderInline')
.valueFieldManagement
.setValue(v == null ? 0.0 : v.toDouble(), trigger: false))
.slider(
controlKey: 'sliderInline',
min: 0,
max: 100,
inline: true,
onChanged: (v) {
formManagement
.newFormFieldManagement('sliderInlineText')
.valueFieldManagement
.setValue(v.toDouble().toInt(), trigger: false);
})
.rangeSlider(
controlKey: 'rangeSlider',
min: 0,
max: 100,
label: 'range slider',
rangeSubLabelRender: RangeSubLabelRender((start) {
return Text(start.toStringAsFixed(0));
}, (end) {
return Text(end.toStringAsFixed(0));
}),
onChanged: (value) =>
print('range slider value changed ' + value.toString()),
)
.filterChip<String>(
label: 'Filter Chip',
controlKey: 'commonField',
onChanged: (value) => print('Filter Chip Changed: $value'),
validator: (t) =>
t.length < 3 ? 'at least three items must be selected ' : null,
items: FormBuilder.toFilterChipItems([
'java',
'android',
'flutter',
'html',
'css',
'javascript',
'C#',
'swift',
'object-c'
]))
.field(
flex: 1,
inline: false,
controlKey: '123',
field: StatelessField(builder: (context) {
BuilderInfo info = BuilderInfo.of(context);
return Column(
children: [
ClearableTextFormField(
autovalidateMode: info.stateMap['autovalidateMode'],
validator: (t) => 'always validate',
),
TextButton(
onPressed: () {
formManagement.newFormFieldManagement('123').update1(
'autovalidateMode', AutovalidateMode.always);
},
child: Text('set always validate'))
],
);
}))
.nextLine()
.field(
field: StatelessField(builder: (context) {
BuilderInfo info = BuilderInfo.of(context);
FieldKey fieldKey = info.fieldKey;
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'I\'m a custom field',
style: TextStyle(fontSize: 20),
),
Container(
color: info.formThemeData.themeData.primaryColor
.withOpacity(0.3),
child: ListView(
shrinkWrap: true,
children: [
createRow('row', '${fieldKey.row}'),
createRow('column', '${fieldKey.column}'),
createRow('controlKey', '${fieldKey.controlKey ?? ''}'),
createRow('flex', '${info.flex}'),
createRow('inline', '${info.inline}'),
createRow('readOnly', '${info.readOnly}'),
],
),
)
],
);
}),
flex: 2,
inline: false);
}
}
class Label extends CommonField {
final String label;
Label(this.label)
: super(
{'label': TypedValue<String>(label)},
builder: (state, stateMap, readOnly, formThemeData) {
return Text(
stateMap['label'],
style: TextStyle(
fontSize: 18, color: formThemeData.themeData.primaryColor),
);
},
);
}
class Button extends CommonField {
Button()
: super(
{},
builder: (state, stateMap, readOnly, formThemeData) {
return Padding(
padding: const EdgeInsets.only(
left: 16, right: 16, bottom: 16, top: 8),
child: Container(
height: 48,
decoration: BoxDecoration(
color: formThemeData.themeData.primaryColor,
borderRadius: const BorderRadius.all(Radius.circular(24.0)),
boxShadow: <BoxShadow>[
BoxShadow(
color: Colors.grey.withOpacity(0.6),
blurRadius: 8,
offset: const Offset(4, 4),
),
],
),
child: Material(
color: Colors.transparent,
child: InkWell(
borderRadius: const BorderRadius.all(Radius.circular(24.0)),
highlightColor: Colors.transparent,
onTap: () {
FormManagement management =
FormManagement.of(state.context);
Map<String, Widget> widgets =
management.data.map((key, value) => MapEntry(
key,
Row(
children: [
Expanded(
child: Text(key),
flex: 1,
),
Expanded(
child: Text(value.toString()),
flex: 1,
),
],
)));
showDialog(
context: state.context,
builder: (BuildContext context) {
return AlertDialog(
content: Container(
width: double.maxFinite,
child: SingleChildScrollView(
child: Column(
children: List.from(widgets.values),
),
),
),
);
});
},
child: Center(
child: Text(
'Apply',
style: TextStyle(
fontWeight: FontWeight.w500,
fontSize: 18,
color: Colors.white),
),
),
),
),
),
);
},
);
}Metadata
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Publisher
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Metadata
flutter form builder, used to quickly build a row-column based form
Repository (GitHub)
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License
unknown (license)
