ChartModel class

An observable data model for driving chart widget rebuilds.

ChartModel extends ChangeNotifier so it can be used with ListenableBuilder, ChartBuilder, or any listener-based subscription pattern.

final model = ChartModel(
  type: ChartType.line,
  values: [10, 20, 15, 30, 25],
  showGrid: true,
);

// Later, update the data:
model.values = [12, 22, 18, 35, 28]; // notifies listeners
Inheritance

Constructors

ChartModel({ChartType type = ChartType.line, List<double> values = const [], List<ChartSeries> series = const [], List<List<double>> grid = const [], bool showGrid = false, bool showMarkers = true, bool showAxis = true, bool donut = false, double innerRadiusRatio = 0.45, bool normalizeTotals = true, ChartRamp? ramp, UvStyle? lineStyle, UvStyle? barStyle, UvStyle? gridStyle, UvStyle? labelStyle, List<UvStyle>? sliceStyles, List<String>? xLabels, List<String>? yLabels, String? title})
Creates a ChartModel with the given configuration.

Properties

barStyle ↔ UvStyle?
Style for bar chart elements.
getter/setter pair
donut ↔ bool
Whether to render a donut hole (pie charts).
getter/setter pair
grid ↔ List<List<double>>
2D grid data for ChartType.heatmap.
getter/setter pair
gridStyle ↔ UvStyle?
Style for grid lines.
getter/setter pair
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
innerRadiusRatio ↔ double
Inner radius ratio for donut charts.
getter/setter pair
labelStyle ↔ UvStyle?
Style for axis labels.
getter/setter pair
lineStyle ↔ UvStyle?
Style for line/sparkline chart elements.
getter/setter pair
normalizeTotals ↔ bool
Whether ribbon charts normalize each column to 100%.
getter/setter pair
ramp ↔ ChartRamp?
Colour ramp for heatmap rendering.
getter/setter pair
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
series ↔ List<ChartSeries>
Named data series for multi-series charts like ChartType.ribbon.
getter/setter pair
showAxis ↔ bool
Whether to draw the axis line (bar charts).
getter/setter pair
showGrid ↔ bool
Whether to draw background grid lines.
getter/setter pair
showMarkers ↔ bool
Whether to draw markers at data points (line charts).
getter/setter pair
sliceStyles ↔ List<UvStyle>?
Per-slice/per-series styles for pie and ribbon charts.
getter/setter pair
title ↔ String?
An optional title displayed above the chart.
getter/setter pair
type ↔ ChartType
The type of chart to render.
getter/setter pair
values ↔ List<double>
The primary data values for single-series charts.
getter/setter pair
xLabels ↔ List<String>?
Labels for the X axis.
getter/setter pair
yLabels ↔ List<String>?
Labels for the Y axis.
getter/setter pair

Methods

addListener(void listener()) → void
Register listener to be called when the object notifies.
inherited
dispose() → void
Releases all listeners. After this call the notifier should not be used.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Notify all registered listeners.
inherited
removeListener(void listener()) → void
Remove a previously registered listener.
inherited
throwIfDisposed() → void
Throws StateError if this notifier has already been disposed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

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