/**
 * Drag & Drop system for Calendar events.
 * Uses native Pointer Events API — no external DnD library needed.
 */
import type { Attachment } from 'svelte/attachments';
import type { CalendarEvent } from './calendar.types.js';
export interface DragState {
    active: boolean;
    event: CalendarEvent | null;
    originDate: Date | null;
    ghostEl: HTMLElement | null;
}
export declare function createDragState(): DragState;
export interface DraggableEventOptions {
    event: CalendarEvent;
    disabled?: boolean;
    onDragStart?: () => void;
    onDragEnd?: (targetDate: Date | null) => void;
}
/**
 * Svelte attachment that makes a calendar event element draggable.
 * Uses Pointer Events for cross-device support (touch + mouse).
 *
 * Usage: `<div {@attach draggableEvent({ event, disabled, onDragEnd })}>`
 */
export declare function draggableEvent(opts: DraggableEventOptions): Attachment<HTMLElement>;
export interface ResizableEventOptions {
    /** The event being resized. */
    event: CalendarEvent;
    /**
     * The box that spans exactly `startHour`…`endHour` — the event's own day
     * column (`[data-day-column]` in CalendarTimeGrid), which is what pixels are
     * mapped to minutes against.
     *
     * Explicitly NOT the scroll port: since #96 that port also carries the week's
     * pinned head/all-day strip above the hours, so neither its top edge nor its
     * height is the day. Its height is read from `getBoundingClientRect()` rather
     * than `scrollHeight` for the same reason a column beats the port — an event
     * dragged past the bottom edge grows the scrollable overflow and would move
     * the denominator mid-gesture.
     */
    dayColumnEl: HTMLElement;
    /** The event block element whose height changes during resize. */
    eventEl: HTMLElement;
    /** Start hour of the time grid. */
    startHour: number;
    /** End hour of the time grid (exclusive). */
    endHour: number;
    /** Snap interval in minutes. @default 15 */
    snapMinutes?: number;
    /** Minimum event duration in minutes. @default 15 */
    minDuration?: number;
    /** Whether resize is disabled. */
    disabled?: boolean;
    /** Callback when resize completes. */
    onResizeEnd?: (event: CalendarEvent, newEnd: Date) => void;
}
/**
 * Svelte attachment for the resize handle at the bottom of a time-grid event.
 * Drag the handle up/down to change the event's duration, snapping to
 * a configurable grid (default 15 minutes).
 */
export declare function resizableEvent(opts: ResizableEventOptions): Attachment<HTMLElement>;