/**
 * GuiState — Grouped state management for GUI configuration.
 *
 * Replaces the flat IGUIStates object with 4 semantic sub-groups:
 * - mode:         Tool mode flags (pencil/eraser/sphere)
 * - drawing:      Brush/pencil appearance and behavior
 * - viewConfig:   UI layout and interaction parameters
 * - layerChannel: Active layer, channel, and visibility
 */
import type { IToolModeState, IDrawingConfig, IViewConfig, ILayerChannelState } from "../core/types";
export declare class GuiState {
    readonly mode: IToolModeState;
    readonly drawing: IDrawingConfig;
    readonly viewConfig: IViewConfig;
    readonly layerChannel: ILayerChannelState;
    constructor(options?: {
        defaultPaintCursor?: string;
        defaultFillColor?: string;
        defaultBrushColor?: string;
        layers?: string[];
    });
}