HandSignature class

A widget that provides a canvas for drawing hand signatures. It combines HandSignaturePaint for rendering and RawGestureDetector for input handling, sending gesture events to a HandSignatureControl.

Inheritance

Constructors

HandSignature.new({Key? key, required HandSignatureControl control, @Deprecated('This property is deprecated since 3.1.0. Use the `drawer` property instead to specify the drawing type and style.') SignatureDrawType type = SignatureDrawType.shape, @Deprecated('This property is deprecated since 3.1.0. Use the `drawer` property instead to specify the drawing color.') Color color = Colors.black, @Deprecated('This property is deprecated since 3.1.0. Use the `drawer` property instead to specify the minimal stroke width.') double width = 1.0, @Deprecated('This property is deprecated since 3.1.0. Use the `drawer` property instead to specify the maximal stroke width.') double maxWidth = 10.0, HandSignatureDrawer? drawer, VoidCallback? onPointerDown, VoidCallback? onPointerUp, Set<PointerDeviceKind>? supportedDevices})
Creates a HandSignature widget.
const

Properties

color → Color
@Deprecated('This property is deprecated since 3.1.0. Use the drawer property instead to specify the drawing color.') The single color used for painting the signature.
final
control → HandSignatureControl
The controller that manages the creation and manipulation of signature paths.
final
drawer → HandSignatureDrawer?
The HandSignatureDrawer responsible for rendering the signature. If null, a default drawer will be created based on the deprecated type, color, width, and maxWidth properties.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
maxWidth → double
@Deprecated('This property is deprecated since 3.1.0. Use the drawer property instead to specify the maximal stroke width.') The maximal stroke width of the signature path.
final
onPointerDown → VoidCallback?
Optional callback function invoked when a new signature path drawing starts (pointer down event).
final
onPointerUp → VoidCallback?
Optional callback function invoked when a signature path drawing ends (pointer up or cancel event).
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
supportedDevices → Set<PointerDeviceKind>?
The set of PointerDeviceKinds that this widget should recognize.
final
type → SignatureDrawType
@Deprecated('This property is deprecated since 3.1.0. Use the drawer property instead to specify the drawing type and style.') The type of signature path to draw.
final
width → double
@Deprecated('This property is deprecated since 3.1.0. Use the drawer property instead to specify the minimal stroke width.') The minimal stroke width of the signature path.
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
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