import { ActionBehavior, ActionBehaviorConstructorProps } from '../actionbehavior';
import { Component } from '../component';
import { ContextManager } from '../context';
import { Event } from '../event';
export type DownloadSnapshotProps = ActionBehaviorConstructorProps;
/**
 * Behavior for downloading a captured canvas snapshot as an image.
 *
 * @zbehavior
 * @zicon download
 * @zgroup Actions
 */
export declare class DownloadSnapshot extends ActionBehavior<DownloadSnapshotProps> {
    /**
     * Event triggered when a snapshot is saved.
     * @zui
     */
    onSave: Event<[]>;
    constructor(contextManager: ContextManager, instance: Component, props: DownloadSnapshotProps);
    /** @zprop */
    perform(): void;
    private download;
    /** @zui */
    preview(): void;
}