FormMapDropdownField<TValue> class
Drop down form to select from there with Map as an option.
Place under the Form that gave FormController.key, or pass FormController to form.
When FormController is passed to form, onSaved must also be passed together. The contents of onSaved will be used to save the data.
Enter the initial value given by FormController.value in initialValue.
Each time the content is changed, onChanged is executed.
If FormController.validate is executed, validation and data saving are performed.
Only when emptyErrorText is specified, emptyErrorText will be displayed as an error if no characters are entered.
Other error checking is performed by specifying validator. If a string other than Null is returned in the callback, the string is displayed as an error statement. If Null is returned, it is processed as no error.
By specifying picker, it is possible to set the selection method for Map.
Deactivated when enabled is set to false
.
Mapを選択肢としてそこから選択するためのドロップダウンフォーム。
FormController.keyを与えたForm配下に配置、もしくはformにFormControllerを渡します。
formにFormControllerを渡した場合、一緒にonSavedも渡してください。データの保存はonSavedの内容が実行されます。
initialValueにFormController.valueから与えられた初期値を入力します。
内容が変更される度onChangedが実行されます。
FormController.validateが実行された場合、バリデーションとデータの保存を行ないます。
emptyErrorTextが指定されている時に限り、文字が入力されていない場合emptyErrorTextがエラーとして表示されます。
それ以外のエラーチェックはvalidatorを指定することで行ないます。 コールバック内でNull以外を返すようにするとその文字列がエラー文として表示されます。Nullの場合はエラーなしとして処理されます。
pickerを指定することでMapの選択方法を設定することが可能です。
enabledがfalse
になると非有効化されます。
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- FormField<
String> - FormMapDropdownField
- Available Extensions
Constructors
-
FormMapDropdownField({FormController<
TValue> ? form, Key? key, FormAffixStyle? prefix, FormAffixStyle? suffix, String? hintText, String? labelText, String? emptyErrorText, FormStyle? style, void onChanged(String? value)?, required FormMapDropdownFieldPicker picker, FocusNode? focusNode, bool keepAlive = true, Widget? icon, bool expanded = false, TValue onSaved(String value)?, String validator(String? value)?, String? initialValue, bool enabled = true}) - Drop down form to select from there with Map as an option.
Properties
- autovalidateMode → AutovalidateMode
-
Used to enable/disable this form field auto validation and update its
error text.
finalinherited
-
builder
→ FormFieldBuilder<
String> -
Function that returns the widget representing this form field. It is
passed the form field state as input, containing the current value and
validation state of this field.
finalinherited
- emptyErrorText → String?
-
Error text. Only displayed if no characters are entered.
final
- enabled → bool
-
Whether the form is able to receive user input.
finalinherited
- expanded → bool
-
Extend the form.
final
- focusNode → FocusNode?
-
Specifies the focus node.
final
-
form
→ FormController<
TValue> ? -
Context for forms.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- hintText → String?
-
Hint to be displayed on the form. Displayed when no text is entered.
final
- icon → Widget?
-
Specify the icon displayed on the right side of the drop-down form.
final
- initialValue → String?
-
An optional value to initialize the form field to, or null otherwise.
finalinherited
- keepAlive → bool
-
If placed in a list, whether or not it should not be discarded on scrolling.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- labelText → String?
-
Label text for forms.
final
- onChanged → (void Function(String? value)?)
-
Callback to be executed each time the value is changed.
final
-
onSaved
→ FormFieldSetter<
String> ? -
An optional method to call with the final value when the form is saved via
FormState.save.
finalinherited
- picker → FormMapDropdownFieldPicker
-
Picker object for selecting from Map.
final
- prefix → FormAffixStyle?
-
A widget that is placed in front of the form.
final
- restorationId → String?
-
Restoration ID to save and restore the state of the form field.
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- style → FormStyle?
-
Form Style.
final
- suffix → FormAffixStyle?
-
A widget that is placed after the form.
final
-
validator
→ FormFieldValidator<
String> ? -
An optional method that validates an input. Returns an error string to
display if the input is invalid, or null otherwise.
finalinherited
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → FormFieldState< String> -
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}) → 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