/**
 * ContrastTool - Contrast adjustment event handlers
 *
 * Extracted from DrawToolCore.ts:
 * - setupConrastEvents
 * - configContrastDragMode / removeContrastDragMode
 * - updateSlicesContrast / repraintCurrentContrastSlice
 */
import { BaseTool } from "./BaseTool";
import type { ToolContext } from "./BaseTool";
import type { IContrastEvents } from "../core/types";
import type { ContrastHostDeps } from "./ToolHost";
export declare class ContrastTool extends BaseTool {
    private contrastEventPrameters;
    private container;
    private callbacks;
    constructor(ctx: ToolContext, container: HTMLElement, contrastEventPrameters: IContrastEvents, callbacks: ContrastHostDeps);
    setupConrastEvents(callback: (step: number, towards: "horizental" | "vertical") => void): void;
    configContrastDragMode(): void;
    removeContrastDragMode(): void;
    updateSlicesContrast(value: number, flag: string): void;
    repraintCurrentContrastSlice(): void;
}