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