import { CSSResultGroup, PropertyValues, TemplateResult, LitElement } from 'lit';

/**
 * It displays an expandable panel connected to a `sbb-checkbox` or to a `sbb-radio-button`.
 *
 * @slot - Use the unnamed slot to add `sbb-checkbox` or `sbb-radio-button` elements to the `sbb-selection-panel`.
 * @slot badge - Use this slot to provide a `sbb-card-badge` (optional).
 * @slot content - Use this slot to provide custom content for the panel (optional).
 * @event {CustomEvent<void>} willOpen - Emits whenever the content section starts the opening transition.
 * @event {CustomEvent<void>} didOpen - Emits whenever the content section is opened.
 * @event {CustomEvent<void>} willClose - Emits whenever the content section begins the closing transition.
 * @event {CustomEvent<void>} didClose - Emits whenever the content section is closed.
 */
export declare class SbbSelectionPanelElement extends LitElement {
    static styles: CSSResultGroup;
    static readonly events: Record<string, string>;
    /** The background color of the panel. */
    color: 'white' | 'milk';
    /** Whether the content section is always visible. */
    forceOpen: boolean;
    /** Whether the unselected panel has a border. */
    borderless: boolean;
    /** The state of the selection panel. */
    private set _state(value);
    private get _state();
    /** Whether the selection panel is checked. */
    private set _checked(value);
    private get _checked();
    /** Whether the selection panel is disabled. */
    private set _disabled(value);
    /** Emits whenever the content section starts the opening transition. */
    private _willOpen;
    /** Emits whenever the content section is opened. */
    private _didOpen;
    /** Emits whenever the content section begins the closing transition. */
    private _willClose;
    /** Emits whenever the content section is closed. */
    private _didClose;
    private _abort;
    private _initialized;
    /**
     * Whether it has an expandable content
     * @internal
     */
    get hasContent(): boolean;
    constructor();
    connectedCallback(): void;
    protected willUpdate(changedProperties: PropertyValues<this>): void;
    protected firstUpdated(changedProperties: PropertyValues<this>): void;
    private _updateState;
    private _open;
    private _close;
    private _initFromInput;
    private _onInputStateChange;
    private _onAnimationEnd;
    protected render(): TemplateResult;
}
declare global {
    interface HTMLElementTagNameMap {
        'sbb-selection-panel': SbbSelectionPanelElement;
    }
}
//# sourceMappingURL=selection-panel.d.ts.map