Ruler class

A widget that displays a ruler in imperial or metric units.

Ruler.count is used to display a ruler with a fixed number of notches and defined by the notchCount parameter. Ruler.dynamic is used to display a ruler with a fixed width in pixels and defined by the notchWidth parameter. Ruler.real is used to display a ruler with a fixed width in pixels and defined by the notchWidth parameter.

Inheritance

Constructors

Ruler.count(DistanceUnit notchCount, {Axis axis = Axis.horizontal, RulerSide? notchSide, TextStyle? numberTextStyle, RulerSide? numberSide, double? numberSpacing, double? notchScaleFactor, Color? notchColor, bool? showBase, double? thickness, Key? key})
const
Ruler.dynamic(DistanceUnit notchWidth, {Axis axis = Axis.horizontal, RulerSide? numberSide, RulerSide? notchSide, TextStyle? numberTextStyle, double? notchScaleFactor, Color? notchColor, bool? showBase, double? numberSpacing, double? thickness, Key? key})
const
Ruler.real({MeasureSystem system = MeasureSystem.metric, int graduation = 8, Key? key, Axis axis = Axis.horizontal, RulerSide? numberSide, RulerSide? notchSide, TextStyle? numberTextStyle, double? notchScaleFactor, Color? notchColor, bool? showBase, double? numberSpacing, double? thickness})

Properties

axis → Axis
The axis of the ruler Axis.horizontal or Axis.vertical
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
notchColor → Color?
The notches and base color
final
notchCount → DistanceUnit?
The number of notches used with _RulerType.count
final
notchScaleFactor → double?
The notches and base scale factor
final
notchSide → RulerSide?
The side of the notches and the base to the ruler
final
notchWidth → DistanceUnit?
The notch width in pixels used with _RulerType.dynamic the distance type used for graduation only
final
numberSide → RulerSide?
The side of the numbers to the notches
final
numberSpacing → double?
The spacing between the numbers and the notches
final
numberTextStyle → TextStyle?
Used for the numbers
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
showBase → bool?
Show the base of the ruler
final
thickness → double?
The thickness of notches and base
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}) → 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