LabelPainter class

Inheritance

Constructors

LabelPainter({double opacity = 1, bool hasArrow = false, bool hasLabelBox = false, ArrowPosition arrowPosition = ArrowPosition.top, double arrowHeight = kArrowHeight, EdgeInsets labelBoxPadding = const EdgeInsets.all(8.0), BoxDecoration labelBoxDecoration = const BoxDecoration(shape: BoxShape.rectangle, borderRadius: BorderRadius.all(Radius.circular(8.0)), color: transparentColor), required Rect hole, required bool isTop})

Properties

arrowHeight → double
Triangle height will be used to calculate all the side of equilateral triangle representing the arrow
final
arrowPosition → ArrowPosition
By the default the value is ArrowPosition.topCenter you have to set the arrow position according to your widget position It will not be calculated automatically
final
hasArrow → bool
By default, the value is false. The arrow will not be displayed if the hasLabelBox is false. the background color and the border will be read from the the labelBoxDecoration
final
hashCode → int
The hash code for this object.
no setterinherited
hasLabelBox → bool
By default, the value is false
final
hole → Rect
final
isTop → bool
final
labelBoxDecoration → BoxDecoration
By default, the value is
final
labelBoxPadding → EdgeInsets
By default, the value is EdgeInsets.all(8.0)
final
opacity → double
By default, the value is 1. This property is used for fading animation of the texts and the label box
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
drawBottomArrow(Rect paddingBox, double a, double b) → Path
drawBottomCenterArrow(Rect paddingBox, double a, double b) → Path
drawCenterLeftArrow(Rect paddingBox, double a, double b) → Path
drawCenterRightArrow(Rect paddingBox, double a, double b) → Path
drawTopArrow(Rect paddingBox, double a, double b) → Path
drawTopCenterArrow(Rect paddingBox, double a, double b) → Path
hitTest(Offset position) → bool
Called whenever a hit test is being performed on an object that is using this custom paint delegate.
override
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
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 LabelPainter 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

Static Properties

paragraphRect ↔ Rect
getter/setter pair