hand_signature

• Custom Drawing with HandSignatureDrawer: Introduced a new abstract class HandSignatureDrawer that allows for complete customization of how signatures are drawn. This provides developers with the flexibility to implement their own drawing logic by extending this class.
• Built-in Drawers: Added several built-in drawers for common use cases:
  • LineSignatureDrawer: Draws the path as simple lines.
  • ArcSignatureDrawer: Renders the path as a series of arcs with variable width.
  • ShapeSignatureDrawer: Draws the path as a filled shape.
  • DynamicSignatureDrawer: Dynamically selects a drawer based on parameters in the path data.
  • MultiSignatureDrawer: Allows combining multiple drawers for complex visual effects.
• Pressure Sensitivity: The signature input now captures pressure data from supported devices. The line thickness can vary with pressure. The pressureRatio in SignaturePathSetup can be used to balance between pressure and velocity.
• Path Configuration: Introduced SignaturePathSetup to provide a more structured way to configure path properties like smoothRatio, velocityRange, and pressureRatio. It also includes an args map for passing custom data to drawers.

State Handling

• Rendering: The drawing pipeline has been refactored to be more customizable, with SignaturePathSetup that can hold all the necessary variables for drawer.

• Data Serialization: The toMap and import methods in HandSignatureControl have been updated to version 2, which includes the SignaturePathSetup for each path and pressure value for each point.

• Also Comes with updated examples.

Now can specify input type - PointerDeviceKind.

Resolve vertices scaling with fit flag in export.
Rename some properties to unify naming across library.

Removed dependency on flutter_svg and removed HandSignatureView.

toPicture and toImage now contains fit property.

New GestureRecognizer based on OneSequenceGestureRecognizer that allows just one pointer and handles all pointer updates. All previous Recognizers have been removed.

Minimum Dart SDK 2.12.0

Added TapGestureDetector and current PanGestureDetector has been modified to support drawing in ScrollView.
Also pointer callbacks are now exposed to detect start and end of drawing.

Draw line as single shape (huge performance update).
Selection of 3 draw styles (shape, arc, line). Arc is still nicest, but has performance issues..
SignatureDrawType.shape is now default draw and export style.

Support dot drawing based on last line size.
Minor performance updates.

Signature pad for smooth and real hand signatures.