/**
 * AllDayCollapseService - Manages collapse/expand UI for all-day events
 *
 * STATELESS SERVICE - Reads expanded state from DOM via AllDayDomReader
 * - No persistent state
 * - Reads expanded state from DOM CSS class
 * - Updates chevron button and overflow indicators
 * - Controls event visibility based on row number
 */
import { AllDayHeightService } from './AllDayHeightService';
export declare class AllDayCollapseService {
    private heightService;
    constructor(heightService: AllDayHeightService);
    /**
     * Toggle between expanded and collapsed state
     * Reads current state from DOM, toggles it, and updates UI
     */
    toggleExpanded(): void;
    /**
     * Update all UI elements based on current DOM state
     */
    private updateUI;
    /**
     * Update event visibility based on expanded state
     */
    private updateEventVisibility;
    /**
     * Update chevron button visibility and state
     */
    private updateChevronButton;
    /**
     * Update overflow indicators for collapsed state
     * Shows "+X more" indicators in columns with overflow
     */
    private updateOverflowIndicators;
    /**
     * Clear all overflow indicators
     */
    private clearOverflowIndicators;
    /**
     * Initialize collapse/expand UI based on current DOM state
     * Called after events are rendered
     */
    initializeUI(): void;
}