/**
 * @fileoverview Utility functions for implementing edge scrolling during drag operations.
 * This provides auto-scrolling functionality when the cursor reaches the edge of the viewport.
 *
 * ドラッグ操作中のエッジスクロール機能を実装するためのユーティリティ関数。
 * カーソルがビューポートの端に到達した際の自動スクロール機能を提供します。
 */
export interface EdgeScrollConfig {
    triggerDistance: number;
    scrollSpeed: number;
    maxScrollSpeed: number;
}
export declare const DEFAULT_EDGE_SCROLL_CONFIG: EdgeScrollConfig;
export interface ScrollVector {
    x: number;
    y: number;
}
export declare const calculateScrollVector: (clientX: number, clientY: number, config?: EdgeScrollConfig, scrollElement?: HTMLElement) => ScrollVector;
export declare const performScroll: (scrollVector: ScrollVector, scrollElement?: HTMLElement) => void;
export declare class EdgeScrollManager {
    private intervalId;
    private config;
    private isActive;
    private scrollElement?;
    constructor(config?: EdgeScrollConfig, scrollElement?: HTMLElement);
    setScrollElement(element?: HTMLElement): void;
    start(clientX: number, clientY: number): void;
    update(clientX: number, clientY: number): void;
    stop(): void;
    isScrolling(): boolean;
    updateConfig(newConfig: EdgeScrollConfig): void;
}
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