77 lines
2.0 KiB
JavaScript
77 lines
2.0 KiB
JavaScript
goog.provide('ol.control.ZoomToExtent');
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goog.require('goog.asserts');
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goog.require('goog.dom');
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goog.require('ol.events');
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goog.require('ol.events.EventType');
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goog.require('ol.control.Control');
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goog.require('ol.css');
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/**
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* @classdesc
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* A button control which, when pressed, changes the map view to a specific
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* extent. To style this control use the css selector `.ol-zoom-extent`.
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*
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* @constructor
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* @extends {ol.control.Control}
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* @param {olx.control.ZoomToExtentOptions=} opt_options Options.
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* @api stable
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*/
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ol.control.ZoomToExtent = function(opt_options) {
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var options = opt_options ? opt_options : {};
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/**
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* @type {ol.Extent}
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* @private
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*/
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this.extent_ = options.extent ? options.extent : null;
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var className = options.className !== undefined ? options.className :
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'ol-zoom-extent';
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var label = options.label !== undefined ? options.label : 'E';
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var tipLabel = options.tipLabel !== undefined ?
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options.tipLabel : 'Fit to extent';
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var button = goog.dom.createDom('BUTTON', {
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'type': 'button',
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'title': tipLabel
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}, label);
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ol.events.listen(button, ol.events.EventType.CLICK,
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this.handleClick_, this);
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var cssClasses = className + ' ' + ol.css.CLASS_UNSELECTABLE + ' ' +
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ol.css.CLASS_CONTROL;
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var element = goog.dom.createDom('DIV', cssClasses, button);
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goog.base(this, {
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element: element,
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target: options.target
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});
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};
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goog.inherits(ol.control.ZoomToExtent, ol.control.Control);
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/**
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* @param {Event} event The event to handle
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* @private
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*/
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ol.control.ZoomToExtent.prototype.handleClick_ = function(event) {
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event.preventDefault();
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this.handleZoomToExtent_();
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};
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/**
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* @private
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*/
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ol.control.ZoomToExtent.prototype.handleZoomToExtent_ = function() {
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var map = this.getMap();
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var view = map.getView();
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var extent = !this.extent_ ? view.getProjection().getExtent() : this.extent_;
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var size = map.getSize();
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goog.asserts.assert(size, 'size should be defined');
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view.fit(extent, size);
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};
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