HeatmapMark<T> class final

One Cartesian matrix cell per row, with colour encoding an independent measured value.

Heatmap is intentionally not a scatter colour channel: X and Y remain spatial coordinates while value owns a dedicated HeatmapColorScale. Phase 1 permits one Heatmap geometry per plot plus reference annotations.

Inheritance

Constructors

HeatmapMark({required FieldAccessor<T, num> x, required FieldAccessor<T, num> y, required FieldAccessor<T, num> value, required HeatmapColorScale colorScale, String? id, String? name, String? yAxisId, FieldAccessor<T, bool>? missing, FieldAccessor<T, String?>? pointKey, FieldAccessor<T, String?>? label, String? unit, double? cellWidth, double? cellHeight, double? gapFraction, Color? borderColor, double? borderWidth, double? cornerRadius, bool? showCellLabels, Color? cellLabelColor, double? cellLabelFontSize, HeatmapEmptyValueStyle? emptyValueStyle, HeatmapValueFilter? valueFilter})
Creates a Heatmap geometry.
const

Properties

borderColor → Color?
final
borderWidth → double?
final
cellHeight → double?
final
cellLabelColor → Color?
final
cellLabelFontSize → double?
final
cellWidth → double?
Optional cell and label presentation overrides.
final
color → Color?
Base color for this geometry. Null inherits the theme's series color.
finalinherited
colorScale → HeatmapColorScale
Native numeric colour mapping.
final
cornerRadius → double?
final
emptyValueStyle → HeatmapEmptyValueStyle?
final
gapFraction → double?
final
hashCode → int
The hash code for this object.
no setteroverride
id → String?
Stable id for this mark.
finalinherited
label → FieldAccessor<T, String?>?
Optional cell label accessor.
final
missing → FieldAccessor<T, bool>?
Optional explicit missing-cell channel.
final
name → String?
Display name used by legends and tooltips.
finalinherited
pointKey → FieldAccessor<T, String?>?
Optional stable identity accessor for update/selection continuity.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
showCellLabels → bool?
final
unit → String?
Unit shown with measured values.
final
value → FieldAccessor<T, num>
Independent measured value encoded by colorScale.
final
valueFilter → HeatmapValueFilter?
final
x → FieldAccessor<T, num>
Horizontal cell-centre accessor.
final
y → FieldAccessor<T, num>
Vertical cell-centre accessor.
final
yAxisId → String?
Id of the YAxisConfig in PlotSpec.yAxes this mark measures against.
finalinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
override

Operators

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