ScannerPainter class Null safety

扫码框+浅色背景 Code scanning box + light background

Inheritance

Constructors

ScannerPainter({double? hornStrokeWidth, double? scannerStrokeWidth, double? hornWidth, Color? scannerColor, Color? borderColor, Color? backgroundColor, Size? scannerSize, required double value})

Properties

backgroundColor Color
final
borderColor Color
final
hashCode int
The hash code for this object. [...]
read-only, inherited
hornStrokeWidth double
四角线宽度 Width of quadrangular line
final
hornWidth double
四角线长度 Length of quadrangular line
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
scannerColor Color
final
scannerSize Size?
扫描框大小 Scan frame size
final
scannerStrokeWidth double
识别框中间的线 Line in the middle of the identification frame
final
semanticsBuilder SemanticsBuilderCallback?
Returns a function that builds semantic information for the picture drawn by this painter. [...]
read-only, inherited
value double
final

Methods

addListener(VoidCallback listener) → void
Register a closure to be notified when it is time to repaint. [...]
inherited
hitTest(Offset position) bool?
Called whenever a hit test is being performed on an object that is using this custom paint delegate. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
paint(Canvas canvas, Size size) → void
Called whenever the object needs to paint. The given Canvas has its coordinate space configured such that the origin is at the top left of the box. The area of the box is the size of the size argument. [...]
override
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that the object notifies when it is time to repaint. [...]
inherited
shouldRebuildSemantics(covariant CustomPainter oldDelegate) bool
Called whenever a new instance of the custom painter delegate class is provided to the RenderCustomPaint object, or any time that a new CustomPaint object is created with a new instance of the custom painter delegate class (which amounts to the same thing, because the latter is implemented in terms of the former). [...]
inherited
shouldRepaint(covariant CustomPainter oldDelegate) bool
Called whenever a new instance of the custom painter delegate class is provided to the RenderCustomPaint object, or any time that a new CustomPaint object is created with a new instance of the custom painter delegate class (which amounts to the same thing, because the latter is implemented in terms of the former). [...]
override
toString() String
A string representation of this object. [...]
inherited

Operators

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