import { ChangeDetectorRef } from "@angular/core";
import { FeedbackService } from "./feedback.service";
import { FeedbackConfiguration } from "./feedback-configuration.model";
import { DomSanitizer } from "@angular/platform-browser";
export declare class FeedbackScreenshotComponent {
    private changeDetection;
    private feedback;
    configuration: FeedbackConfiguration;
    domSanitizer: DomSanitizer;
    screenshots: string[];
    uploadErrorMessage: string;
    private canvas;
    private canvasContext;
    private isDrawing;
    private centerX;
    private centerY;
    private highlight;
    private highlightLeft;
    private highlightTop;
    private highlightWidth;
    private highlightHeight;
    private preRenderScrollPosition;
    private mouseDownListener;
    private mouseMoveListener;
    private mouseUpListener;
    constructor(changeDetection: ChangeDetectorRef, domSanitizer: DomSanitizer, feedback: FeedbackService);
    /**
     * Add transparent background to canvas.
     */
    private addCanvasAlphaBackground();
    /**
     * Add a screenshot from local machine.
     * @param event the event of selecting image.
     */
    addScreenshot(event: any): void;
    /**
     * Adjust the drawing according to user movement.
     * @param x the x-axis movement position.
     * @param y the y-axis movement position.
     */
    private adjustDrawing(x, y);
    /**
     * Clear highlight params.
     */
    private clearHighlightParams();
    /**
     * Clear all screenshots.
     */
    clearScreenshots(): void;
    /**
     * Check if upload file is allowed.
     * @param file the file.
     * @return {boolean} wheter allowed or not.
     */
    private checkIsUploadFileAllowed(file);
    /**
     * Create a canvas of the page.
     */
    private createCanvas();
    /**
     * Destroy the page canvas.
     */
    destroyCanvas(): void;
    /**
     * Enter the screenshot mode.
     */
    enterScreenshotMode(): void;
    /**
     * Finish drawing at given position.
     * @param x the x-axis page position to finish at.
     * @param y the y-axis page position to finish at.
     */
    private finishDrawing(x, y);
    /**
     * Get the max image count allowed.
     * @return {boolean} the count.
     */
    getMaxImageCount(): number;
    /**
     * Check whether max image count has been reached.
     * @return {boolean} whether max image count has been reached.
     */
    isMaxImageCountReached(): boolean;
    /**
     * Process rendered screenshot.
     * @param canvas the canvas.
     * @param onlyHighlighted whether to capture only highlighted area.
     */
    private processRenderedScreenshot(canvas, onlyHighlighted);
    /**
     * Redraw the canvas context.
     */
    private redraw();
    /**
     * Remove image at given index.
     * @param index the index in screenshot array.
     */
    remove(index: number): void;
    /**
     * Remove transparent background from canvas.
     */
    private removeCanvasAlphaBackground();
    /**
     * Remove the mouse drawing events.
     */
    private removeMouseDrawingEvents();
    /**
     * Setup mouse drawing events.
     */
    private setupMouseDrawingEvents();
    /**
     * Start drawing from given position.
     * @param x the x-axis page position to start at.
     * @param y the y-axis page position to start at.
     */
    private startDrawing(x, y);
    /**
     * Capture a screenshot.
     */
    takeScreenshot(): void;
}