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85 lines
2.5 KiB
85 lines
2.5 KiB
/**
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* @module ol/interaction/DragZoom
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*/
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import DragBox from './DragBox.js';
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import {easeOut} from '../easing.js';
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import {shiftKeyOnly} from '../events/condition.js';
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/**
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* @typedef {Object} Options
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* @property {string} [className='ol-dragzoom'] CSS class name for styling the
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* box.
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* @property {import("../events/condition.js").Condition} [condition] A function that
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* takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a
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* boolean to indicate whether that event should be handled.
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* Default is {@link module:ol/events/condition.shiftKeyOnly}.
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* @property {number} [duration=200] Animation duration in milliseconds.
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* @property {boolean} [out=false] Use interaction for zooming out.
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* @property {number} [minArea=64] The minimum area of the box in pixel, this value is used by the parent default
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* `boxEndCondition` function.
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*/
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/**
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* @classdesc
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* Allows the user to zoom the map by clicking and dragging on the map,
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* normally combined with an {@link module:ol/events/condition} that limits
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* it to when a key, shift by default, is held down.
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*
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* To change the style of the box, use CSS and the `.ol-dragzoom` selector, or
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* your custom one configured with `className`.
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* @api
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*/
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class DragZoom extends DragBox {
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/**
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* @param {Options} [options] Options.
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*/
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constructor(options) {
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options = options ? options : {};
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const condition = options.condition ? options.condition : shiftKeyOnly;
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super({
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condition: condition,
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className: options.className || 'ol-dragzoom',
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minArea: options.minArea,
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});
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/**
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* @private
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* @type {number}
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*/
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this.duration_ = options.duration !== undefined ? options.duration : 200;
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/**
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* @private
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* @type {boolean}
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*/
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this.out_ = options.out !== undefined ? options.out : false;
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}
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/**
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* Function to execute just before `onboxend` is fired
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* @param {import("../MapBrowserEvent.js").default} event Event.
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*/
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onBoxEnd(event) {
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const map = this.getMap();
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const view = /** @type {!import("../View.js").default} */ (map.getView());
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let geometry = this.getGeometry();
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if (this.out_) {
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const rotatedExtent = view.rotatedExtentForGeometry(geometry);
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const resolution = view.getResolutionForExtentInternal(rotatedExtent);
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const factor = view.getResolution() / resolution;
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geometry = geometry.clone();
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geometry.scale(factor * factor);
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}
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view.fitInternal(geometry, {
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duration: this.duration_,
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easing: easeOut,
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});
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}
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}
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export default DragZoom;
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