+ This example demonstrates how to provide AutoComplete suggestions for + an address calling Google's Geocoding Service. +
++ Geocoding is the process of converting addresses into geographic + coordinates. The Google Geocoding API + provides a direct way to access a geocoder via an HTTP request. +
++ Google's Geocoding Service returns a JSON object literal. The service does + not provide a JSONP API. AutoComplete cannot use that object + directly for security reasons. So the workaround is calling the service + using YQL as source. +
++ + +
+ +-
+
- Latitude: +
- Longitude: +
Complete Example Source
+ +JavaScript
+YUI().use('autocomplete', function (Y) {
+ var acNode = Y.one('#ac-input');
+
+ acNode.plug(Y.Plugin.AutoComplete, {
+ // Highlight the first result of the list.
+ activateFirstItem: true,
+
+ // The list of the results contains up to 10 results.
+ maxResults: 10,
+
+ // To display the suggestions, the minimum of typed chars is five.
+ minQueryLength: 5,
+
+ // Number of milliseconds to wait after user input before triggering a
+ // `query` event. This is useful to throttle queries to a remote data
+ // source.
+ queryDelay: 500,
+
+ // Handling the list of results is mandatory, because the service can be
+ // unavailable, can return an error, one result, or an array of results.
+ // However `resultListLocator` needs to always return an array.
+ resultListLocator: function (response) {
+ // Makes sure an array is returned even on an error.
+ if (response.error) {
+ return [];
+ }
+
+ var query = response.query.results.json,
+ addresses;
+
+ if (query.status !== 'OK') {
+ return [];
+ }
+
+ // Grab the actual addresses from the YQL query.
+ addresses = query.results;
+
+ // Makes sure an array is always returned.
+ return addresses.length > 0 ? addresses : [addresses];
+ },
+
+ // When an item is selected, the value of the field indicated in the
+ // `resultTextLocator` is displayed in the input field.
+ resultTextLocator: 'formatted_address',
+
+ // {query} placeholder is encoded, but to handle the spaces correctly,
+ // the query is has to be encoded again:
+ //
+ // "my address" -> "my%2520address" // OK => {request}
+ // "my address" -> "my%20address" // OK => {query}
+ requestTemplate: function (query) {
+ return encodeURI(query);
+ },
+
+ // {request} placeholder, instead of the {query} one, this will insert
+ // the `requestTemplate` value instead of the raw `query` value for
+ // cases where you actually want a double-encoded (or customized) query.
+ source: 'SELECT * FROM json WHERE ' +
+ 'url="http://maps.googleapis.com/maps/api/geocode/json?' +
+ 'sensor=false&' +
+ 'address={request}"',
+
+ // Automatically adjust the width of the dropdown list.
+ width: 'auto'
+ });
+
+ // Adjust the width of the input container.
+ acNode.ac.after('resultsChange', function () {
+ var newWidth = this.get('boundingBox').get('offsetWidth');
+ acNode.setStyle('width', Math.max(newWidth, 100));
+ });
+
+ // Fill the `lat` and `lng` fields when the user selects an item.
+ acNode.ac.on('select', function (e) {
+ var location = e.result.raw.geometry.location;
+
+ Y.one('#locationLat').set('text', location.lat);
+ Y.one('#locationLng').set('text', location.lng);
+ });
+});
+
+
+HTML
+
+Note: be sure to add the yui3-skin-sam classname to the
+page's <body> element or to a parent element of the widget in order to apply
+the default CSS skin. See Understanding Skinning.
+
<div id="demo" class="yui3-skin-sam"> <!-- You need this skin class --> + <p> + <label for="ac-input">Enter an address:</label> + <input id="ac-input" type="text" /> + </p> + + <ul> + <li>Latitude: <strong id="locationLat"></strong></li> + <li>Longitude: <strong id="locationLng"></strong></li> + </ul> +</div>+ + + +