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