import { type TgdCamera, TgdContext, TgdControllerCameraOrbit, type TgdControllerCameraOrbitOptions, TgdEvent } from "@tolokoban/tgd";
import { type ScalebarOptions } from "./scalebar";
export interface CanvasOptions extends WebGLContextAttributes {
    cameraController: Partial<TgdControllerCameraOrbitOptions> | null;
    name: string;
}
export declare abstract class AbstractCanvas {
    readonly eventPixelScaleChange: TgdEvent<number>;
    readonly eventMouseWheelWithoutCtrl: TgdEvent<void>;
    readonly name: string;
    private _camera;
    private previousCameraHeight;
    private previousCameraZoom;
    private previousViewportHeight;
    protected readonly options: CanvasOptions;
    orbiter: TgdControllerCameraOrbit | null;
    protected context: TgdContext | null;
    private _canvas;
    constructor(options: Partial<CanvasOptions>);
    get camera(): TgdCamera;
    set camera(value: TgdCamera);
    refresh(): void;
    toggleFullscreen(): Promise<boolean>;
    takeSnapshot(target: HTMLCanvasElement): void;
    get pixelScale(): number;
    computeScalebar(options?: Partial<ScalebarOptions>): {
        sizeInPixel: number;
        value: number;
        unit: string;
    } | null;
    get canvas(): HTMLCanvasElement | null;
    set canvas(canvas: HTMLCanvasElement | null);
    protected abstract init(): void;
    private readonly handleMouseWheel;
    private readonly handlePixelScaleDispatch;
}
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