99 lines
2.8 KiB
JavaScript
99 lines
2.8 KiB
JavaScript
/**
|
|
* @module ol/interaction/DragZoom
|
|
*/
|
|
import {easeOut} from '../easing.js';
|
|
import {shiftKeyOnly} from '../events/condition.js';
|
|
import {createOrUpdateFromCoordinates, getBottomLeft, getCenter, getTopRight, scaleFromCenter} from '../extent.js';
|
|
import DragBox from '../interaction/DragBox.js';
|
|
|
|
|
|
/**
|
|
* @typedef {Object} Options
|
|
* @property {string} [className='ol-dragzoom'] CSS class name for styling the
|
|
* box.
|
|
* @property {import("../events/condition.js").Condition} [condition] A function that
|
|
* takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a
|
|
* boolean to indicate whether that event should be handled.
|
|
* Default is {@link module:ol/events/condition~shiftKeyOnly}.
|
|
* @property {number} [duration=200] Animation duration in milliseconds.
|
|
* @property {boolean} [out=false] Use interaction for zooming out.
|
|
*/
|
|
|
|
|
|
/**
|
|
* @classdesc
|
|
* Allows the user to zoom the map by clicking and dragging on the map,
|
|
* normally combined with an {@link module:ol/events/condition} that limits
|
|
* it to when a key, shift by default, is held down.
|
|
*
|
|
* To change the style of the box, use CSS and the `.ol-dragzoom` selector, or
|
|
* your custom one configured with `className`.
|
|
* @api
|
|
*/
|
|
class DragZoom extends DragBox {
|
|
/**
|
|
* @param {Options=} opt_options Options.
|
|
*/
|
|
constructor(opt_options) {
|
|
const options = opt_options ? opt_options : {};
|
|
|
|
const condition = options.condition ? options.condition : shiftKeyOnly;
|
|
|
|
super({
|
|
condition: condition,
|
|
className: options.className || 'ol-dragzoom',
|
|
onBoxEnd: onBoxEnd
|
|
});
|
|
|
|
/**
|
|
* @private
|
|
* @type {number}
|
|
*/
|
|
this.duration_ = options.duration !== undefined ? options.duration : 200;
|
|
|
|
/**
|
|
* @private
|
|
* @type {boolean}
|
|
*/
|
|
this.out_ = options.out !== undefined ? options.out : false;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @this {DragZoom}
|
|
*/
|
|
function onBoxEnd() {
|
|
const map = this.getMap();
|
|
const view = /** @type {!import("../View.js").default} */ (map.getView());
|
|
const size = /** @type {!import("../size.js").Size} */ (map.getSize());
|
|
let extent = this.getGeometry().getExtent();
|
|
|
|
if (this.out_) {
|
|
const mapExtent = view.calculateExtent(size);
|
|
const boxPixelExtent = createOrUpdateFromCoordinates([
|
|
map.getPixelFromCoordinate(getBottomLeft(extent)),
|
|
map.getPixelFromCoordinate(getTopRight(extent))]);
|
|
const factor = view.getResolutionForExtent(boxPixelExtent, size);
|
|
|
|
scaleFromCenter(mapExtent, 1 / factor);
|
|
extent = mapExtent;
|
|
}
|
|
|
|
const resolution = view.constrainResolution(
|
|
view.getResolutionForExtent(extent, size));
|
|
|
|
let center = getCenter(extent);
|
|
center = view.constrainCenter(center);
|
|
|
|
view.animate({
|
|
resolution: resolution,
|
|
center: center,
|
|
duration: this.duration_,
|
|
easing: easeOut
|
|
});
|
|
}
|
|
|
|
|
|
export default DragZoom;
|