/**
 * Dialpad Component
 *
 * A 12-key telephone keypad (0-9, *, #) for entering phone numbers
 * and sending DTMF tones during active calls. Pure UI component — no
 * call logic. Use `sw-call-dialpad` for a version that integrates with
 * a call context.
 *
 * @example
 * ```html
 * <sw-dialpad show-call-button></sw-dialpad>
 * ```
 *
 * Long-press behavior:
 * - Long-press the `0` key → inserts `+` (international prefix).
 * - Long-press the backspace button → clears the entire buffer.
 *
 * @fires sw-digit-press       - Fired when a digit button is pressed. Detail: `{ digit: string, digits: string }`
 * @fires sw-dialpad-backspace - Fired when the backspace button is pressed (or long-pressed to clear). Detail: `{ digits: string }`
 * @fires sw-dial              - Fired when the call button is pressed. Detail: `{ digits: string }`
 * @fires sw-dialpad-input     - Fired when free-text input changes (only when `allow-text` is set). Detail: `{ digits: string }`
 *
 * @cssprop [--interactive-button-primary-bg=#044ef4] - Primary accent color.
 * @cssprop [--interactive-button-primary-hover=#0342cf] - Primary color on hover.
 * @cssprop [--interactive-status-success=#22c55e] - Success/call button color.
 * @cssprop [--interactive-button-destructive-bg=#dc2626] - Danger/hangup button color.
 * @cssprop [--bg-surface=#181a28] - Component background.
 * @cssprop [--fg-default=#f0f0f4] - Text color.
 * @cssprop [--fg-muted=#a0a0aa] - Muted text color.
 * @cssprop [--border-default=rgba(255,255,255,0.12)] - Border color.
 */
import { LitElement } from 'lit';
import '../icons/sw-ui-icon.js';
export declare class SwUiDialpad extends LitElement {
    static styles: import("lit").CSSResult[];
    /** Whether to display the call button below the keypad. */
    showCallButton: boolean;
    /** Allow free-text input in the display field (e.g., SIP URIs, vanity letters). Keypad buttons still append DTMF digits. */
    allowText: boolean;
    /** Placeholder text shown in the digit display input. */
    placeholder: string;
    private digits;
    private pressedKey;
    private _longPressTimer;
    private _longPressFired;
    private _startLongPress;
    private _cancelLongPress;
    disconnectedCallback(): void;
    private _clearAll;
    private _pressDigit;
    private _backspace;
    private _dial;
    /**
     * Handle keyboard input on the display field.
     * We intercept all keys and manage state ourselves to prevent the browser
     * from accumulating non-DTMF characters in the input value.
     */
    private _onKeyDown;
    private _onInput;
    render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'sw-ui-dialpad': SwUiDialpad;
    }
}
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