heli-agri/dist/ImageBase.js

HeliAgri is a high-performance, feature-packed library for creating interactive maps on the web. It can display map tiles, vector data and markers loaded from any source on any web page. OpenLayers has been developed to further the use of geographic infor

/**
 * @module ol/ImageBase
 */
import EventTarget from './events/Target.js';
import EventType from './events/EventType.js';
import { abstract } from './util.js';
/**
 * @abstract
 */
class ImageBase extends EventTarget {
    /**
     * @param {import("./extent.js").Extent} extent Extent.
     * @param {number|undefined} resolution Resolution.
     * @param {number} pixelRatio Pixel ratio.
     * @param {import("./ImageState.js").default} state State.
     */
    constructor(extent, resolution, pixelRatio, state) {
        super();
        /**
         * @protected
         * @type {import("./extent.js").Extent}
         */
        this.extent = extent;
        /**
         * @private
         * @type {number}
         */
        this.pixelRatio_ = pixelRatio;
        /**
         * @protected
         * @type {number|undefined}
         */
        this.resolution = resolution;
        /**
         * @protected
         * @type {import("./ImageState.js").default}
         */
        this.state = state;
    }
    /**
     * @protected
     */
    changed() {
        this.dispatchEvent(EventType.CHANGE);
    }
    /**
     * @return {import("./extent.js").Extent} Extent.
     */
    getExtent() {
        return this.extent;
    }
    /**
     * @abstract
     * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.
     */
    getImage() {
        return abstract();
    }
    /**
     * @return {number} PixelRatio.
     */
    getPixelRatio() {
        return this.pixelRatio_;
    }
    /**
     * @return {number} Resolution.
     */
    getResolution() {
        return /** @type {number} */ (this.resolution);
    }
    /**
     * @return {import("./ImageState.js").default} State.
     */
    getState() {
        return this.state;
    }
    /**
     * Load not yet loaded URI.
     * @abstract
     */
    load() {
        abstract();
    }
}
export default ImageBase;