export declare class CanvasDrawer {
    private canvas;
    private ctx;
    private isDrawing;
    private shape;
    constructor(canvas: HTMLCanvasElement);
    private addListener;
    drawLine(x1: number, y1: number, x2: number, y2: number): void;
    drawRect(x: number, y: number, width: number, height: number, color?: string): void;
    drawCircle(x: number, y: number, radius: number, color?: string): void;
    drawEllipse(x: number, y: number, radius: number, color?: string): void;
    clearCanvas(): void;
    setProperties(color: string, lineWidth: number): void;
    drawText(text: string, x: number, y: number, color?: string, fontSize?: number): void;
    drawImage(image: CanvasImageSource, x: number, y: number, width?: number, height?: number): void;
    drawPoint(x: number, y: number, size: number, color?: string): void;
    drawSector(x: number, y: number, radius: number, startAngle: number, endAngle: number, color?: string): void;
    drawRoundedRect(x: number, y: number, width: number, height: number, radius: number, color?: string): void;
    drawTriangle(x1: number, y1: number, x2: number, y2: number, x3: number, y3: number, color?: string): void;
    drawPolygon(points: Array<{
        x: number;
        y: number;
    }>, color?: string): void;
    drawSign(x: number, y: number, text: string, textColor: string, bgColor: string, size: number, icon?: string): void;
    drawSignWithArrow(x: number, y: number, text: string, textColor: string, bgColor: string, fontSize: number, icon?: string, arrowDirection?: 'up' | 'down' | 'left' | 'right'): void;
    drawSignWithArrow2(sourcePointX: number, sourcePointY: number, text: string, fontSize: number, textColor: string, bgColor: string, position?: 'leftTop' | 'top' | 'rightTop' | 'rightBottom' | 'bottom' | 'leftBottom', icon?: string): void;
    private drawArrow;
    private drawArrowHead;
    private autoDetectArrowDirection;
    drawPointerToSign(srcX: number, srcY: number, signX: number, signY: number, signWidth: number, signHeight: number, color?: string, pointerLength?: number): void;
    private drawPointerArrowHead;
    private signs;
    addSign(sign: {
        id: string;
        x: number;
        y: number;
        text: string;
        textColor: string;
        bgColor: string;
        size: number;
        icon?: string;
    }): void;
    moveSign(id: string, offsetX: number, offsetY: number): void;
    scaleSign(id: string, scale: number): void;
    rotateSign(id: string, angle: number): void;
    deleteSign(id: string): void;
    editSignText(id: string, newText: string): void;
    changeSignStyle(id: string, textColor: string, bgColor: string): void;
    private redrawSign;
    private redrawAllSigns;
}