import { Canvas, Rect, RectF } from './canvas';
import { Property } from '@nativescript/core/ui/core/properties';
import { View } from '@nativescript/core/ui/core/view';
import { ObservableArray } from '@nativescript/core/data/observable-array';
import Shape from './shapes/shape';
declare module '@nativescript/core/ui/core/view' {
    interface View {
        _raiseLayoutChangedEvent(): any;
        _onSizeChanged(): any;
    }
}
export declare function createRect(x: number, y: number, w: number, h: number): Rect;
export declare function createRectF(x: number, y: number, w: number, h: number): RectF;
export declare const cachedProperty: Property<CanvasBase, boolean>;
export declare const hardwareAcceleratedProperty: Property<CanvasBase, boolean>;
export declare const densityProperty: Property<CanvasBase, number>;
export declare const DEFAULT_SCALE: number;
export declare abstract class CanvasBase extends View {
    protected _shapes: ObservableArray<Shape>;
    get shapes(): ObservableArray<Shape>;
    cached: boolean;
    density: number;
    hardwareAccelerated: boolean;
    drawFameRate: boolean;
    getOrCreateShapes(): ObservableArray<Shape>;
    requestDrawShapes(): void;
    requestDrawShapesThrottled: (...args: any[]) => void;
    _onShapesContentsChanged(): void;
    toString(): string;
    addShape(shape: Shape): void;
    removeShape(shape: Shape): void;
    _addArrayFromBuilder(name: string, value: any[]): void;
    _addChildFromBuilder(name: string, value: any): void;
    _removeView(view: any): void;
    private onShapesCollectionChanged;
    onSizeChanged(w: number, h: number, oldw: number, oldh: number): void;
    onShapePropertyChange(): void;
    private addPropertyChangeHandler;
    private removePropertyChangeHandler;
    shapesCanvas: Canvas;
    drawShapes(): void;
    invalidate(): void;
    abstract redraw(): any;
    protected abstract onDraw(canvas: Canvas): any;
}