67 lines
1.9 KiB
JavaScript
67 lines
1.9 KiB
JavaScript
goog.provide('ol.interaction.DoubleClickZoom');
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goog.require('goog.asserts');
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goog.require('ol.MapBrowserEvent');
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goog.require('ol.MapBrowserEvent.EventType');
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goog.require('ol.interaction.Interaction');
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/**
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* @classdesc
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* Allows the user to zoom by double-clicking on the map.
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*
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* @constructor
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* @extends {ol.interaction.Interaction}
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* @param {olx.interaction.DoubleClickZoomOptions=} opt_options Options.
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* @api stable
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*/
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ol.interaction.DoubleClickZoom = function(opt_options) {
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var options = goog.isDef(opt_options) ? opt_options : {};
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/**
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* @private
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* @type {number}
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*/
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this.delta_ = goog.isDef(options.delta) ? options.delta : 1;
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goog.base(this, {
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handleEvent: ol.interaction.DoubleClickZoom.handleEvent
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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_ = goog.isDef(options.duration) ? options.duration : 250;
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};
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goog.inherits(ol.interaction.DoubleClickZoom, ol.interaction.Interaction);
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/**
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* Handles the {@link ol.MapBrowserEvent map browser event} (if it was a
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* doubleclick) and eventually zooms the map.
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* @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
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* @return {boolean} `false` to stop event propagation.
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* @this {ol.interaction.DoubleClickZoom}
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* @api
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*/
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ol.interaction.DoubleClickZoom.handleEvent = function(mapBrowserEvent) {
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var stopEvent = false;
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var browserEvent = mapBrowserEvent.browserEvent;
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if (mapBrowserEvent.type == ol.MapBrowserEvent.EventType.DBLCLICK) {
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var map = mapBrowserEvent.map;
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var anchor = mapBrowserEvent.coordinate;
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var delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;
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var view = map.getView();
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goog.asserts.assert(!goog.isNull(view), 'view should not be null');
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ol.interaction.Interaction.zoomByDelta(
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map, view, delta, anchor, this.duration_);
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mapBrowserEvent.preventDefault();
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stopEvent = true;
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}
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return !stopEvent;
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};
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