ChartHitTest class abstract final

Pure hit-testing over a ChartScene. No Flutter painting — every function here is a deterministic query so the interaction layer (and tests) can reason about gestures without a canvas.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

markAt(ChartScene scene, Offset point, {double radius = tapRadius}) → PlotMark?

The mark a tap at point selects: first any mark whose PlotMark.region contains the point (bars), else the nearest PlotMark.center within radius. Returns null when nothing is close enough.

marksAtIndex(ChartScene scene, int index) → List<PlotMark>

Every mark sharing column index (all series stacked at one x).

nearestIndexAtX(ChartScene scene, double px) → int?

The column index nearest pixel x px — the trackball column. Uses the scene's ChartScene.scale when present, else the nearest mark by center x.

rangeBetween(ChartScene scene, double startX, double endX) → ChartRange?

The inclusive column range spanned by a drag from pixel x startX to endX, with every mark inside it. Returns null for an empty scene.

Constants

tapRadius → const double

The default tap radius (logical px) within which a point-like mark counts as hit when no PlotMark.region contains the pointer.