90 lines
2.4 KiB
JavaScript
90 lines
2.4 KiB
JavaScript
/**
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* @module ol/interaction/DragZoom
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*/
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import {inherits} from '../index.js';
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import _ol_easing_ from '../easing.js';
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import _ol_events_condition_ from '../events/condition.js';
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import {createOrUpdateFromCoordinates, getBottomLeft, getCenter, getTopRight, scaleFromCenter} from '../extent.js';
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import _ol_interaction_DragBox_ from '../interaction/DragBox.js';
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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 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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*
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* @constructor
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* @extends {ol.interaction.DragBox}
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* @param {olx.interaction.DragZoomOptions=} opt_options Options.
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* @api
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*/
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var _ol_interaction_DragZoom_ = function(opt_options) {
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var options = opt_options ? opt_options : {};
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var condition = options.condition ?
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options.condition : _ol_events_condition_.shiftKeyOnly;
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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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_ol_interaction_DragBox_.call(this, {
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condition: condition,
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className: options.className || 'ol-dragzoom'
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});
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};
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inherits(_ol_interaction_DragZoom_, _ol_interaction_DragBox_);
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/**
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* @inheritDoc
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*/
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_ol_interaction_DragZoom_.prototype.onBoxEnd = function() {
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var map = this.getMap();
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var view = /** @type {!ol.View} */ (map.getView());
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var size = /** @type {!ol.Size} */ (map.getSize());
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var extent = this.getGeometry().getExtent();
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if (this.out_) {
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var mapExtent = view.calculateExtent(size);
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var boxPixelExtent = createOrUpdateFromCoordinates([
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map.getPixelFromCoordinate(getBottomLeft(extent)),
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map.getPixelFromCoordinate(getTopRight(extent))]);
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var factor = view.getResolutionForExtent(boxPixelExtent, size);
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scaleFromCenter(mapExtent, 1 / factor);
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extent = mapExtent;
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}
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var resolution = view.constrainResolution(
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view.getResolutionForExtent(extent, size));
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var center = getCenter(extent);
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center = view.constrainCenter(center);
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view.animate({
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resolution: resolution,
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center: center,
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duration: this.duration_,
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easing: _ol_easing_.easeOut
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});
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};
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export default _ol_interaction_DragZoom_;
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