openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
64 lines (53 loc) • 1.77 kB
JavaScript
goog.provide('ol.interaction.DoubleClickZoom');
goog.require('ol');
goog.require('ol.MapBrowserEvent');
goog.require('ol.interaction.Interaction');
/**
* @classdesc
* Allows the user to zoom by double-clicking on the map.
*
* @constructor
* @extends {ol.interaction.Interaction}
* @param {olx.interaction.DoubleClickZoomOptions=} opt_options Options.
* @api stable
*/
ol.interaction.DoubleClickZoom = function(opt_options) {
var options = opt_options ? opt_options : {};
/**
* @private
* @type {number}
*/
this.delta_ = options.delta ? options.delta : 1;
ol.interaction.Interaction.call(this, {
handleEvent: ol.interaction.DoubleClickZoom.handleEvent
});
/**
* @private
* @type {number}
*/
this.duration_ = options.duration !== undefined ? options.duration : 250;
};
ol.inherits(ol.interaction.DoubleClickZoom, ol.interaction.Interaction);
/**
* Handles the {@link ol.MapBrowserEvent map browser event} (if it was a
* doubleclick) and eventually zooms the map.
* @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
* @return {boolean} `false` to stop event propagation.
* @this {ol.interaction.DoubleClickZoom}
* @api
*/
ol.interaction.DoubleClickZoom.handleEvent = function(mapBrowserEvent) {
var stopEvent = false;
var browserEvent = mapBrowserEvent.originalEvent;
if (mapBrowserEvent.type == ol.MapBrowserEvent.EventType.DBLCLICK) {
var map = mapBrowserEvent.map;
var anchor = mapBrowserEvent.coordinate;
var delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;
var view = map.getView();
ol.interaction.Interaction.zoomByDelta(
map, view, delta, anchor, this.duration_);
mapBrowserEvent.preventDefault();
stopEvent = true;
}
return !stopEvent;
};