HandSignatureControl class - signature library

Constructors

HandSignatureControl({double threshold = 3.0, double smoothRatio = 0.65, double velocityRange = 2.0}): Controls input from HandSignature and creates smooth signature path. threshold minimal distance between two points. smoothRatio smoothing ratio of curved parts. velocityRange controls velocity speed and dampening between points (only Shape and Arc drawing types using this property to control line width). aka how fast si signature drawn..
HandSignatureControl.fromMap(Map<String, dynamic> data): factory

Properties

hasActivePath → bool: Checks if is there unfinished path.
no setter
hashCode → int: The hash code for this object.
no setterinherited
hasListeners → bool: Whether any listeners are currently registered.
no setterinherited
isFilled → bool: Checks if something is drawn.
no setter
lines → List<CubicLine>: Lazy list of all Lines.
no setter
params ↔ SignaturePaintParams?: Visual parameters of line painting.
getter/setter pair
paths → List<CubicPath>: List of currently completed lines.
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
smoothRatio → double: Smoothing ratio of path.
final
threshold → double: Distance between two control points.
final
velocityRange → double: Maximal velocity.
final

Methods

addListener(VoidCallback listener) → void: Register a closure to be called when the object changes.
inherited
alterPath(Offset point) → void: Adds [point[ to active path.
clear() → void: Clears all data.
closePath({Offset? point}) → void: Closes active path at given point.
dispose() → void: Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
override
equals(HandSignatureControl other) → bool: Currently checks only equality of paths.
importData(Map data) → void: Expects data from toMap.
importPath(List<CubicPath> paths, [Size? bounds]) → void: Imports given paths and alters current signature data.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
notifyDimension(Size size) → bool: Handles canvas size changes.
notifyListeners() → void: Call all the registered listeners.
inherited
removeListener(VoidCallback listener) → void: Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
startPath(Offset point) → void: Starts new line at given point.
stepBack() → bool: Removes last line.
toImage({int width = 512, int height = 256, Color? color, Color? background, double? size, double? maxSize, double? border, ImageByteFormat format = ImageByteFormat.png, bool fit = true}) → Future<ByteData?>: Exports data to raw image.
toMap() → Map<String, dynamic>: Converts dat to Map (json) Exported data can be restored via HandSignatureControl.fromMap factory or via importData method.
toPicture({int width = 512, int height = 256, Color? color, Color? background, double? size, double? maxSize, double? border, bool fit = true}) → Picture?: Exports data to Picture.
toString() → String: A string representation of this object.
inherited
toSvg({SignatureDrawType type = SignatureDrawType.shape, bool wrapSignature = false, Size? size, double border = 0.0, Color? color, double? strokeWidth, double? maxStrokeWidth}) → String?: Converts data to svg String. type - data structure.

Operators

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