import type * as React from 'react';
/** @internal Options for {@link useChannelSlider}. */
export interface UseChannelSliderOptions {
    /** Published as `data-channel`, and the name reported if the part is rendered outside a `ColorPicker`. */
    channel: 'hue' | 'alpha';
    /** Name of the calling part, for the context error message. */
    consumerName: string;
    /** Top of the range as ARIA reports it; the bottom is always 0. */
    max: number;
    /**
     * Highest value actually reachable, when that is not `max`; hue needs it since 360 is 0.
     * @default options.max
     */
    limit?: number | undefined;
    /** Current position on that range. */
    value: number;
    orientation: 'horizontal' | 'vertical';
    /** Accessible name used when the consumer supplies none. */
    defaultLabel: string;
    /** Builds `aria-valuetext` — the number alone never conveys which colour resulted. */
    valueText: (value: number) => string;
    /** Receives an already clamped and step-snapped value. */
    onChange: (value: number) => void;
}
type ChannelSliderElementProps = React.ComponentPropsWithoutRef<'div'> & Record<`data-${string}`, string | number | undefined>;
/** @internal What {@link useChannelSlider} hands back for the part to assemble. */
export interface ChannelSlider {
    /** ARIA, `data-*` and `tabIndex`. Spread **before** the consumer's props so every one of them stays overridable. */
    props: ChannelSliderElementProps;
    /** Compose onto the element's `onKeyDown`. */
    onKeyDown: (event: React.KeyboardEvent<HTMLDivElement>) => void;
    /** Compose onto the element's `onPointerDown`. */
    onPointerDown: (event: React.PointerEvent<HTMLDivElement>) => void;
    /** Merge **before** the consumer's `style`. */
    style: React.CSSProperties;
    dragging: boolean;
}
/** @internal Rounds to two decimals so a fractional `step` doesn't leak float noise into the DOM. */
export declare function round2(value: number): number;
/** @internal Rounds a raw channel value onto the `step` grid, with float-drift correction, and clamps into `0...max`. */
export declare function snapChannel(raw: number, step: number, max: number): number;
/** @internal `step: 0` means continuous under the pointer, not that the keyboard does nothing; arrows fall back to one unit. */
export declare function arrowStep(step: number): number;
/**
 * Shared behavior for `ColorPickerHueSlider` and `ColorPickerAlphaSlider`: a linear `role="slider"` track with pointer drag, click-to-seek, and full keyboard support.
 * @internal
 */
export declare function useChannelSlider(options: UseChannelSliderOptions): ChannelSlider;
export {};