GridColumns class

Vertical grid lines (columns) spanning the height of a chart.

GridColumns renders vertical lines at positions determined by a scale. These are typically used with an x-axis scale to show reference lines for values.

Example usage:

GridColumns(
  scale: scaleLinear(domain: [0, 100], range: [0, 400]),
  width: 400,
  height: 300,
  tickCount: 5,
)
Inheritance

Constructors

GridColumns({Key? key, required dynamic scale, List? tickValues, int tickCount = 10, GridConfig config = const GridConfig(), required double width, required double height})
Creates vertical grid columns.
const

Properties

config → GridConfig
Configuration for grid lines.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
height → double
The height of the grid area.
finalinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scale → dynamic
The scale used to determine grid line positions.
finalinherited
tickCount → int
The number of grid lines to generate (if tickValues is not provided).
finalinherited
tickValues → List?
Custom tick values for grid lines.
finalinherited
width → double
The width of the grid area.
finalinherited

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
getPositions() → List<double>
Returns the positions for grid lines.
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