import { Observable } from "rxjs";
import { CanvasPoint, CanvasTool } from "../../../../shared";
export interface CanvasPlacement {
    left: number;
    top: number;
    width: number;
    height: number;
}
export interface CanvasLine {
    begin: CanvasPoint;
    end: CanvasPoint;
    tool: CanvasTool;
}
export interface CanvasContextConfig {
    lineWidth: number;
    lineCap: string;
    strokeStyle: string;
    globalCompositeOperation?: string;
}
export declare class CanvasArray<T> extends Array<T> {
    private observer;
    observable: Observable<number>;
    constructor();
    push(x: T): number;
}