PieChart class

A pie or donut chart widget.

Renders values as proportional angular slices within a circular area of width×height cells. Terminal cell aspect ratio is compensated by cellAspect.

PieChart(
  values: [30, 20, 50],
  width: 20,
  height: 10,
  donut: true,
  sliceStyles: [
    UvStyle(bg: UvColor.rgb(230, 57, 70)),
    UvStyle(bg: UvColor.rgb(42, 157, 143)),
    UvStyle(bg: UvColor.rgb(233, 196, 106)),
  ],
)
Inheritance

Constructors

PieChart({required List<double> values, int? width, int? height, List<UvStyle>? sliceStyles, bool useBackground = true, bool donut = false, double innerRadiusRatio = 0.45, double cellAspect = 2.0, String glyph = ' ', List<ChartLegendEntry>? legendEntries, int legendColumns = 1, int legendRowGap = 0, ChartLegendPosition legendPosition = ChartLegendPosition.topRight, int legendPadding = 1, int? crosshairX, int? crosshairY, UvStyle? crosshairStyle, Key? key})
Creates a PieChart with the given data and display options.

Properties

cellAspect → double
Width-to-height ratio of terminal cells for circle compensation.
final
children → List<Widget>
Child widgets that receive forwarded messages.
no setterinherited
crosshairStyle → UvStyle?
Style for the crosshair lines.
final
crosshairX → int?
X coordinate for crosshair overlay, or null to hide.
final
crosshairY → int?
Y coordinate for crosshair overlay, or null to hide.
final
debugRenderObjectPassthrough → bool
Whether this widget is intentionally transparent to render-object layouts.
no setterinherited
donut → bool
Whether to cut out an inner circle (donut mode).
final
focusable → bool
Whether this widget can receive keyboard focus.
no setterinherited
glyph → String
Character rendered in background mode.
final
hashCode → int
The hash code for this object.
no setterinherited
height → int?
The chart height in terminal rows, or null to fill available space.
final
id → String
Unique identifier for this widget.
no setterinherited
innerRadiusRatio → double
Inner radius as a fraction of outer radius in donut mode.
final
key → Key?
Key for preserving widget identity.
finalinherited
legendColumns → int
Number of legend columns.
final
legendEntries → List<ChartLegendEntry>?
Optional legend entries rendered inside chart bounds.
final
legendPadding → int
Inner padding from chart edges to legend area.
final
legendPosition → ChartLegendPosition
Legend placement within chart bounds.
final
legendRowGap → int
Empty rows inserted between legend rows.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
sliceStyles → List<UvStyle>?
Per-slice styles. If null, default empty styles are used.
final
theme → Theme
Access the current theme.
no setterinherited
useBackground → bool
If true, slices are rendered as coloured backgrounds.
final
values → List<double>
The slice sizes (proportional, not normalised).
final
width → int?
The chart width in terminal columns, or null to fill available space.
final

Methods

buildCachedView<T>(T builder(), Object? cacheKey) → T
Returns a cached view if the cache key matches.
inherited
createRenderObject() → RenderObject
override
didUnmountRenderObject(RenderObject renderObject) → void
inherited
handleInit() → Cmd?
Override this instead of init for widget-specific initialization.
inherited
handleIntercept(Msg msg) → (Widget, Cmd?)
Override this to handle messages before they reach children.
inherited
handleUpdate(Msg msg) → (Widget, Cmd?)
Override this to handle messages specific to this widget.
inherited
init() → Cmd?
Called once when the widget is first mounted.
inherited
invalidateCachedView() → void
Clears any cached view for this widget.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited
update(Msg msg) → (Model, Cmd?)
Handles messages by forwarding to children then calling handleUpdate.
inherited
updateRenderObject(RenderObject renderObject) → void
override
view() → Object
Renders the widget to a string or View.
override

Operators

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