ReferenceArea class

Reference area annotation for charts.

Inheritance

Constructors

ReferenceArea({Key? key, required Offset topLeft, required Offset bottomRight, Color color = Colors.blue, double opacity = 0.2, Color? borderColor, double borderWidth = 1, List<double>? borderDashPattern, double cornerRadius = 0, bool showLabel = false, String? label, TextStyle? labelStyle, ReferenceAreaLabelPosition labelPosition = ReferenceAreaLabelPosition.topLeft, Gradient? gradient, VoidCallback? onTap})
const
ReferenceArea.horizontalBand({required double yMin, required double yMax, required double xStart, required double xEnd, Color color = Colors.blue, double opacity = 0.2, Color? borderColor, double borderWidth = 1, String? label, TextStyle? labelStyle})
Creates a horizontal band area.
factory
ReferenceArea.verticalBand({required double xMin, required double xMax, required double yStart, required double yEnd, Color color = Colors.blue, double opacity = 0.2, Color? borderColor, double borderWidth = 1, String? label, TextStyle? labelStyle})
Creates a vertical band area.
factory

Properties

borderColor → Color?
Border color.
final
borderDashPattern → List<double>?
Border dash pattern (null for solid border).
final
borderWidth → double
Border width.
final
bottomRight → Offset
Bottom-right corner of the area.
final
color → Color
Fill color.
final
cornerRadius → double
Corner radius.
final
gradient → Gradient?
Gradient fill (overrides color if provided).
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
label → String?
Label text.
final
labelPosition → ReferenceAreaLabelPosition
Label position within the area.
final
labelStyle → TextStyle?
Label style.
final
onTap → VoidCallback?
Callback when area is tapped.
final
opacity → double
Fill opacity.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
showLabel → bool
Whether to show the label.
final
topLeft → Offset
Top-left corner of the area.
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

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