JsonFormBuilder class

A widget that builds a dynamic form from a JSON configuration.

Supports all major field types, custom theming, validation, conditional logic, sections, and custom fields.

Inheritance

Constructors

JsonFormBuilder({Key? key, required dynamic config, ValueChanged<Map<String, dynamic>>? onChanged, ValueChanged<Map<String, String?>>? onValidation, ValueChanged<Map<String, dynamic>>? onSubmit, FormTheme? theme, bool autoSave = false, String? persistenceKey, Map<String, FieldWidgetBuilder>? customFieldBuilders})
Creates a JsonFormBuilder widget.
const
JsonFormBuilder.fromJsonString(String jsonString, {Key? key, ValueChanged<Map<String, dynamic>>? onChanged, ValueChanged<Map<String, String?>>? onValidation, ValueChanged<Map<String, dynamic>>? onSubmit, FormTheme? theme, bool autoSave = false, String? persistenceKey, Map<String, FieldWidgetBuilder>? customFieldBuilders})
Creates a JsonFormBuilder from a JSON string.
factory

Properties

autoSave → bool
Whether to auto-save form data (not implemented).
final
config → dynamic
The JSON config for the form. Can be a Map or a FormConfig.
final
customFieldBuilders → Map<String, FieldWidgetBuilder>?
Map of custom field builders for user-defined field types.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onChanged → ValueChanged<Map<String, dynamic>>?
Callback when any field value changes. Returns the current form data.
final
onSubmit → ValueChanged<Map<String, dynamic>>?
Callback when the form is submitted and valid. Returns the form data.
final
onValidation → ValueChanged<Map<String, String?>>?
Callback when any field validation changes. Returns the current error map.
final
persistenceKey → String?
Optional key for persisting form data (not implemented).
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
theme → FormTheme?
The theme to use for the form and fields.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<JsonFormBuilder>
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

fromAsset(String assetPath, {Key? key, ValueChanged<Map<String, dynamic>>? onChanged, ValueChanged<Map<String, String?>>? onValidation, ValueChanged<Map<String, dynamic>>? onSubmit, FormTheme? theme, bool autoSave = false, String? persistenceKey, Map<String, FieldWidgetBuilder>? customFieldBuilders}) → Future<JsonFormBuilder>
Creates a JsonFormBuilder from an asset file.