StepLineChartWidget class

A step line chart widget that connects points with horizontal and vertical lines.

Step line charts are useful for displaying data that changes at discrete intervals, such as stock prices or step functions. Each point is connected to the next with a horizontal line followed by a vertical line, creating a step-like appearance.

Features

Multiple data series support
Optional area fill with gradients
Interactive point tapping with visual border highlighting
Mouse hover support
Loading and error states
Full theme support

Example

StepLineChartWidget(
  dataSets: [
    ChartDataSet(
      label: 'Sales',
      color: Colors.blue,
      dataPoints: [
        ChartDataPoint(x: 0, y: 10),
        ChartDataPoint(x: 1, y: 20),
        ChartDataPoint(x: 2, y: 15),
      ],
    ),
  ],
  theme: ChartTheme.light(),
  title: 'Sales Trend',
  onPointTap: (point, datasetIndex, pointIndex, position) {
    // Handle point tap
  },
)

Inheritance

Constructors

StepLineChartWidget({Key? key, required List<ChartDataSet> dataSets, ChartTheme? theme, double lineWidth = 3.0, bool showArea = true, bool showPoints = true, bool showGrid = true, bool showAxis = true, bool showLabel = true, String? title, String? subtitle, bool useGlassmorphism = false, bool useNeumorphism = false, ChartPointCallback? onPointTap, ChartPointHoverCallback? onPointHover, bool isLoading = false, bool isError = false, String? errorMessage})

Properties

dataSets → List<ChartDataSet>: final
errorMessage → String?: final
hashCode → int: The hash code for this object.
no setterinherited
isError → bool: final
isLoading → bool: final
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
lineWidth → double: final
onPointHover → ChartPointHoverCallback?: final
onPointTap → ChartPointCallback?: final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
showArea → bool: final
showAxis → bool: final
showGrid → bool: final
showLabel → bool: final
showPoints → bool: final
subtitle → String?: final
theme → ChartTheme?: final
title → String?: final
useGlassmorphism → bool: final
useNeumorphism → bool: final

Methods

createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<StepLineChartWidget>: Creates the mutable state for this widget at a given location in the tree.
override
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