92 lines
2.7 KiB
JavaScript
92 lines
2.7 KiB
JavaScript
/**
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* @module ol/control/ZoomToExtent
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*/
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import {inherits} from '../util.js';
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import {listen} from '../events.js';
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import EventType from '../events/EventType.js';
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import Control from '../control/Control.js';
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import {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';
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/**
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* @typedef {Object} Options
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* @property {string} [className='ol-zoom-extent'] Class name.
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* @property {Element|string} [target] Specify a target if you want the control
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* to be rendered outside of the map's viewport.
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* @property {string|Element} [label='E'] Text label to use for the button.
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* Instead of text, also an element (e.g. a `span` element) can be used.
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* @property {string} [tipLabel='Fit to extent'] Text label to use for the button tip.
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* @property {module:ol/extent~Extent} [extent] The extent to zoom to. If undefined the validity
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* extent of the view projection is used.
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*/
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/**
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* @classdesc
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* A button control which, when pressed, changes the map view to a specific
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* extent. To style this control use the css selector `.ol-zoom-extent`.
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*
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* @constructor
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* @extends {module:ol/control/Control}
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* @param {module:ol/control/ZoomToExtent~Options=} opt_options Options.
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* @api
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*/
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class ZoomToExtent {
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constructor(opt_options) {
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const options = opt_options ? opt_options : {};
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/**
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* @type {module:ol/extent~Extent}
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* @protected
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*/
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this.extent = options.extent ? options.extent : null;
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const className = options.className !== undefined ? options.className : 'ol-zoom-extent';
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const label = options.label !== undefined ? options.label : 'E';
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const tipLabel = options.tipLabel !== undefined ? options.tipLabel : 'Fit to extent';
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const button = document.createElement('button');
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button.setAttribute('type', 'button');
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button.title = tipLabel;
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button.appendChild(
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typeof label === 'string' ? document.createTextNode(label) : label
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);
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listen(button, EventType.CLICK, this.handleClick_, this);
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const cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;
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const element = document.createElement('div');
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element.className = cssClasses;
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element.appendChild(button);
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Control.call(this, {
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element: element,
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target: options.target
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});
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}
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/**
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* @param {MouseEvent} event The event to handle
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* @private
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*/
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handleClick_(event) {
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event.preventDefault();
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this.handleZoomToExtent();
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}
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/**
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* @protected
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*/
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handleZoomToExtent() {
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const map = this.getMap();
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const view = map.getView();
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const extent = !this.extent ? view.getProjection().getExtent() : this.extent;
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view.fit(extent);
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}
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}
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inherits(ZoomToExtent, Control);
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export default ZoomToExtent;
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