/**
 * Debug Dashboard — Panel Widget Types
 *
 * Shared types for the live debug dashboard. Unlike the scrolling log stream,
 * panel widgets have a fixed slot keyed by `id`: sending the same id again
 * overwrites the value in place instead of scrolling away. Designed for
 * high-frequency / repeated values (audio levels, buffer fill, FPS, etc.).
 *
 * Sibling of log-types.ts — same HTTP-ingest → broadcast flow.
 */
export type WidgetType = 'label' | 'progress' | 'gauge' | 'plot' | 'slider' | 'number' | 'toggle' | 'button';
export declare const CONTROL_TYPES: Set<WidgetType>;
/**
 * Button counters wrap here instead of growing without bound.
 *
 * A source detects a press by comparing the current counter against the last
 * one it saw. That means it must treat ANY backwards jump as "restart, adopt
 * the new value" rather than as a press count — which happens on wrap, on
 * POST /panel/clear, and whenever the hub restarts. Kept well inside the range
 * where common integer types (and JS numbers) are exact, so a 32-bit device
 * reading the value sees the same number we sent.
 */
export declare const BUTTON_COUNTER_MAX = 1000000;
/**
 * HTTP body for POST /panel (and array of these for POST /panels).
 * Only `id` and `type` are required; everything else has sensible defaults.
 */
export interface PanelHttpEntry {
    id?: string;
    type?: string;
    value?: number | string | number[];
    group?: string;
    label?: string;
    unit?: string;
    min?: number;
    max?: number;
    step?: number;
    warn?: number;
    crit?: number;
    color?: string;
    order?: number;
    state?: string;
    scale?: string;
    decimals?: number;
    autoMin?: boolean;
}
/**
 * Server-side widget state (kept in PanelStore, one per id).
 * For plots, `history` is a ring of the most recent numeric samples.
 */
export interface PanelWidget {
    id: string;
    type: WidgetType;
    value: number | string;
    group: string;
    label: string;
    unit?: string;
    min: number;
    max: number;
    step?: number;
    warn?: number;
    crit?: number;
    color?: string;
    order: number;
    state?: string;
    scale?: string;
    decimals?: number;
    autoMin?: boolean;
    history?: number[];
    lastUpdate: number;
}
export interface PanelClearParams {
    id?: string;
}
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