TurtleGraphicsPainter class

TurtleGraphicsPainter is a CustomPainter. It helps in drawing some fractal art to create some romantic UI for your awesome applications. It's based on Turtle Graphic, Wikipedia.

Inheritance
Available Extensions

Constructors

TurtleGraphicsPainter({required dynamic onDrawing(TurtleGraphicsPainter painter, Canvas canvas, Size size)})
onDrawing draw your own art.

Properties

currentAngle → dynamic
Get current angle.
no setter
currentPoint → dynamic
Get current point.
no setter
hashCode → int
The hash code for this object.
no setterinherited
onDrawing → dynamic Function(TurtleGraphicsPainter painter, Canvas canvas, Size size)
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticsBuilder → SemanticsBuilderCallback?
Returns a function that builds semantic information for the picture drawn by this painter.
no setterinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be notified when it is time to repaint.
inherited
backward(double distance) → void
Move the currentPoint to a point that backward a distance by the currentAngle.
drawLineBackward(Canvas canvas, Paint paint, double distance) → void
Draw a line that backward a distance by the currentAngle, and then move the currentPoint to the end of line.
drawLineForward(Canvas canvas, Paint paint, double distance) → void
Draw a line that forward a distance by the currentAngle, and then move the currentPoint to the end of line.
drawLineTo(Canvas canvas, Paint paint, double x, double y) → void
Draw a line from the currentPoint to a point x,y by current canvas and a single or dynamic paint.
drawPoint(Canvas canvas, Paint paint, Offset p, double size) → void
Draw a point with your size by current canvas and a single or dynamic paint. p is the point to draw.
drawRelativeLineTo(Canvas canvas, Paint paint, double dx, double dy) → void
Draw a line from the currentPoint to a point that translated dx,dy from the currentPoint by current canvas and a single or dynamic paint.
forward(double distance) → void
Move the currentPoint to a point that forward a distance by the currentAngle.
hitTest(Offset position) → bool?
Called whenever a hit test is being performed on an object that is using this custom paint delegate.
inherited
moveTo(double x, double y) → void
Move the currentPoint to a point x,y
moveToPoint(Offset p) → void
Move the currentPoint to p
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent 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
pointTo(double x, double y) → void
Point currentPoint to a point x,y without saving. Then remember to call resetTemporaryPoint after using.
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
resetTemporaryPoint() → void
Reset the currentPoint to the true current point before pointTo.
setAngle(double angle) → void
Set an angle in degree. Why do I use degree? because it's easy to read and understand, it helps you make art easier.
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 TurtleGraphicsPainter 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
turnLeft(double alpha) → void
Turn the currentAngle left/anticlockwise an angle in degree.
turnRight(double angle) → void
Turn the currentAngle right/clockwise an angle in degree.

Operators

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