SfSignaturePadState class Null safety

This class maintains the state of the SfSignaturePad widget.

Inheritance

Constructors

SfSignaturePadState()

Properties

context BuildContext
The location in the tree where this widget builds.
read-only, inherited
hashCode int
The hash code for this object.
read-only, inherited
mounted bool
Whether this State object is currently in a tree.
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
widget SfSignaturePad
The current configuration.
read-only, inherited

Methods

activate() → void
Called when this object is reinserted into the tree after having been removed via deactivate.
@mustCallSuper, @protected, inherited
build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
override
clear() → void
Clears all the signature strokes in the SfSignaturePad.
deactivate() → void
Called when this object is removed from the tree.
@mustCallSuper, @protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
didChangeDependencies() → void
Called when a dependency of this State object changes.
@mustCallSuper, @protected, inherited
didUpdateWidget(covariant SfSignaturePad oldWidget) → void
Called whenever the widget configuration changes.
@mustCallSuper, @protected, inherited
dispose() → void
Called when this object is removed from the tree permanently.
@mustCallSuper, @protected, inherited
initState() → void
Called when this object is inserted into the tree.
@mustCallSuper, @protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
reassemble() → void
Called whenever the application is reassembled during debugging, for example during hot reload.
@mustCallSuper, @protected, inherited
renderToContext2D(dynamic context2D) → void
Renders the signature to a HTML canvas.
setState(VoidCallback fn) → void
Notify the framework that the internal state of this object has changed.
@protected, 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
toImage({double pixelRatio = 1.0}) Future<Image>
Saves the signature as an image. Returns the ui.Image.
toPathList() List<Path>
Creates an unmodifiable ui.Path collection which represents the strokes in the SfSignaturePad.
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
inherited
toStringShort() String
A brief description of this object, usually just the runtimeType and the hashCode.
inherited

Operators

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