69 lines
1.7 KiB
JavaScript
69 lines
1.7 KiB
JavaScript
goog.provide('ol.control.Navigation');
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goog.require('ol.control.Control');
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/**
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* @constructor
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* @extends {ol.control.Control}
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* @param {boolean|undefined} opt_autoActivate
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*/
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ol.control.Navigation = function(opt_autoActivate) {
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goog.base(this, opt_autoActivate);
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/**
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* Activate this control when it is added to a map. Default is true.
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*
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* @type {boolean} autoActivate
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*/
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this.autoActivate_ =
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goog.isDef(opt_autoActivate) ? opt_autoActivate : true;
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};
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goog.inherits(ol.control.Navigation, ol.control.Control);
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/** @inheritDoc */
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ol.control.Navigation.prototype.activate = function() {
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var active = goog.base(this, 'activate');
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if (active) {
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var events = this.getMap().getEvents();
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events.register("drag", this.moveMap, this);
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events.register("scroll", this.zoomMap, this);
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}
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return active;
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};
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/** @inheritDoc */
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ol.control.Navigation.prototype.deactivate = function() {
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var inactive = goog.base(this, 'deactivate');
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if (inactive) {
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var events = this.getMap().getEvents();
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events.unregister("drag", this.moveMap, this);
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events.unregister("scroll", this.zoomMap, this);
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}
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return inactive;
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};
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/**
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* @param {Object} evt
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*/
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ol.control.Navigation.prototype.moveMap = function(evt) {
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this.getMap().moveByPx(evt.deltaX, evt.deltaY);
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return false;
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};
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/**
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* @param {Object} evt
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*/
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ol.control.Navigation.prototype.zoomMap = function(evt) {
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var map = this.getMap(),
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delta = ((evt.deltaY / 3) | 0);
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if (Math.abs(delta) > 0) {
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map.setZoom(map.getZoom() - delta);
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}
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evt.preventDefault();
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return false;
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};
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ol.control.addControl('navigation', ol.control.Navigation); |