wave-roll/dist/lib/core/visualization/piano-roll/utils/scales.d.ts

JavaScript Library for Comparative MIDI Piano-Roll Visualization

import { type ScaleLinear } from "d3-scale";
import type { NoteData } from "@/lib/midi/types";
import type { PianoRollConfig } from "../types";
/**
 * Object returned by createScales.
 * pxPerSecond is included so the caller can cache it
 * and feed it back on the next call to preserve spacing.
 */
export interface Scales {
    timeScale: ScaleLinear<number, number>;
    pitchScale: ScaleLinear<number, number>;
    pxPerSecond: number;
}
/**
 * Derives time- and pitch-axis scales for the piano-roll visualiser.
 *
 * @param notes             MIDI notes already loaded
 * @param options            State of the piano roll
 * @param currentPxPerSecond   Previously computed px/sec ratio (or null)
 * @param TARGET_VISIBLE_SECONDS  How many seconds the viewport should show
 *                                when zoomX === 1 (default = 8 seconds)
 */
export declare function createScales(notes: NoteData[], options: Required<Pick<PianoRollConfig, "width" | "height" | "noteRange" | "showPianoKeys">>, currentPxPerSecond?: number | null, TARGET_VISIBLE_SECONDS?: number, reservedBottomPx?: number): Scales;
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