Shows how to create custom controls.
This example creates a "rotate to north" button.
<!DOCTYPE html> <html> <head> <title>Custom control example</title> <script src="https://code.jquery.com/jquery-1.11.2.min.js"></script> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css"> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script> <link rel="stylesheet" href="http://openlayers.org/en/3.8.1/css/ol.css" type="text/css"> <script src="http://openlayers.org/en/3.8.1/build/ol.js"></script> <style> .rotate-north { top: 65px; left: .5em; } .ol-touch .rotate-north { top: 80px; } </style> </head> <body> <div class="container-fluid"> <div class="row-fluid"> <div class="span12"> <div id="map" class="map"></div> </div> </div> </div> <script> /** * Define a namespace for the application. */ window.app = {}; var app = window.app; // // Define rotate to north control. // /** * @constructor * @extends {ol.control.Control} * @param {Object=} opt_options Control options. */ app.RotateNorthControl = function(opt_options) { var options = opt_options || {}; var button = document.createElement('button'); button.innerHTML = 'N'; var this_ = this; var handleRotateNorth = function(e) { this_.getMap().getView().setRotation(0); }; button.addEventListener('click', handleRotateNorth, false); button.addEventListener('touchstart', handleRotateNorth, false); var element = document.createElement('div'); element.className = 'rotate-north ol-unselectable ol-control'; element.appendChild(button); ol.control.Control.call(this, { element: element, target: options.target }); }; ol.inherits(app.RotateNorthControl, ol.control.Control); // // Create map, giving it a rotate to north control. // var map = new ol.Map({ controls: ol.control.defaults({ attributionOptions: /** @type {olx.control.AttributionOptions} */ ({ collapsible: false }) }).extend([ new app.RotateNorthControl() ]), layers: [ new ol.layer.Tile({ source: new ol.source.OSM() }) ], target: 'map', view: new ol.View({ center: [0, 0], zoom: 2, rotation: 1 }) }); </script> </body> </html>