CngxChartContext

Interface

projects/common/chart/chart/chart-context.ts

Info
API

Referenced by#

Import#

import { CngxChartContext } from '@cngx/common/chart'

Description#

Reactive context published by <cngx-chart> to its content children. Layer atoms ([cngxLine], [cngxBar], ...) and [cngxAxis] inject CNGX_CHART_CONTEXT to read the parent chart's scales, dimensions, data length, and data array without needing a direct reference to the parent class. Token is non-generic at the DI boundary; layer atoms call data<T>() to narrow the array to their own <T> - the single boundary cast lives inside CngxChart's data<U>() method, not at every consumer site.

Index#

Properties

dataLength dimensions plot renderSvg xScale yScale

Methods

data

Instance Properties#

dataLength#Signal

Readonly

dimensions#Signal

Readonly

plot#Signal

Readonly

The plot rectangle inside the viewBox, after the room the projected axes need for their decoration. The chart's own scale ranges and [cngxAxis]'s line placement both read this single derivation, so ticks always line up with marks. A chart without axes gets the full box.

renderSvg#Signal

Readonly

SVG-output gate (default true). Layer atoms wrap their own <svg:path> / <svg:rect> / <svg:circle> emission behind @if (ctx.renderSvg()). The chart shell drives this false only when Canvas mode is active - an atom asks "should I render my own SVG?", never "what mode am I in?".

xScale#Signal>

Readonly

yScale#Signal>

Readonly

Methods#

data#T[]

Generic-aware data accessor. Reads the chart's reactive data array; the consumer's <T> parameter narrows the returned type without a per-call cast at the consumer site. The chart performs one boundary cast in its implementation.