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DoubleClickZoom.js
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DoubleClickZoom.js
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/**
* @module ol/interaction/DoubleClickZoom
*/
import Interaction, {zoomByDelta} from './Interaction.js';
import MapBrowserEventType from '../MapBrowserEventType.js';
/**
* @typedef {Object} Options
* @property {number} [duration=250] Animation duration in milliseconds.
* @property {number} [delta=1] The zoom delta applied on each double click.
*/
/**
* @classdesc
* Allows the user to zoom by double-clicking on the map.
* @api
*/
class DoubleClickZoom extends Interaction {
/**
* @param {Options} [opt_options] Options.
*/
constructor(opt_options) {
super();
const options = opt_options ? opt_options : {};
/**
* @private
* @type {number}
*/
this.delta_ = options.delta ? options.delta : 1;
/**
* @private
* @type {number}
*/
this.duration_ = options.duration !== undefined ? options.duration : 250;
}
/**
* Handles the {@link module:ol/MapBrowserEvent~MapBrowserEvent map browser event} (if it was a
* doubleclick) and eventually zooms the map.
* @param {import("../MapBrowserEvent.js").default} mapBrowserEvent Map browser event.
* @return {boolean} `false` to stop event propagation.
*/
handleEvent(mapBrowserEvent) {
let stopEvent = false;
if (mapBrowserEvent.type == MapBrowserEventType.DBLCLICK) {
const browserEvent = /** @type {MouseEvent} */ (
mapBrowserEvent.originalEvent
);
const map = mapBrowserEvent.map;
const anchor = mapBrowserEvent.coordinate;
const delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;
const view = map.getView();
zoomByDelta(view, delta, anchor, this.duration_);
browserEvent.preventDefault();
stopEvent = true;
}
return !stopEvent;
}
}
export default DoubleClickZoom;