This section presents the full source code of a working sample widget
+for the Media Management
+Service. The widget is programmed to retrieve audio file information.
+You can download the wgz package for this widget from
+section Example widgets.
For general information about creating widgets, see section Widget component files.
+For widget development and debugging purposes, this example writes its
+output to c:\data\jslog_widget.log using console.info.
+For instructions on how to enable logging in the Web browser for S60, see
+section JavaScript console.
<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE plist PUBLIC "-//Nokia//DTD PLIST 1.0//EN" "http://www.nokia.com/NOKIA_COM_1/DTDs/plist-1.0.dtd"> +<plist version="1.0"> +<dict> + <key>DisplayName</key> + <string>MediaManagementSample</string> + <key>Identifier</key> + <string>com.nokia.widget.sapi.MediaManagementSample</string> + <key>Version</key> + <string>1.0</string> + <key>MainHTML</key> + <string>mediamanagement-sample.html</string> +</dict> +</plist>+
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+ <head>
+ <script type="text/javascript" src="js/common.js"></script>
+ <script type="text/javascript" src="js/mediamanagement-sample.js"></script>
+ </head>
+ <body id="docBody" bgcolor="#ddeeff" onload="setup()" style=width:100%;height:100%;>
+ <form name="frm">
+ <h3>MediaManagement API Sample Widget</h3>
+ <input type="button" onclick="getListAsync('img1')" value="GetListAsync"><img id="img1" src="pic/blank.png" width="25" height="25" align="center">
+ <br>
+ <input type="button" onclick="cancelGetListAsync('img2')" value="CancelGetListAsync"><img id="img2" src="pic/blank.png" width="25" height="25" align="center">
+ <hr>
+ <div class="mediaman" id="mediaman" bgcolor="#ddeeff" style=width:100%;height:100%;overflow:auto></div>
+ </form>
+ </body>
+</html>
+// common.js
+//
+// This file contains some utility functions.
+
+// Check the error code and show the information to users
+function checkError(message, resultList, divId, imgId)
+{
+ var errCode = resultList.ErrorCode;
+ var msg = "";
+
+ if (errCode) {
+ msg = message + "<BR>" + "Failed Error: " + errCode + "<BR>";
+ if(resultList.ErrorMessage != undefined)
+ msg += "Error Message: " + resultList.ErrorMessage;
+ showIMG(imgId,"no");
+ } else {
+ showIMG(imgId,"yes");
+ }
+
+ //print error message
+ if(divId != null && divId != undefined)
+ document.getElementById(divId).innerHTML = msg;
+ console.info(msg);
+
+ return errCode;
+}
+
+// Build the message by reading a iteratorable list in a recursive manner
+function showIterableList(iterator)
+{
+ var msg = "";
+ try
+ {
+ iterator.reset();
+ var item;
+ while (( item = iterator.getNext()) != undefined ){
+ msg += showObject(item);
+ }
+ }
+ catch(e)
+ {
+ alert('<showIterableList> ' + e);
+ }
+ return msg;
+}
+
+// Build the message by reading a JS object in a recursive manner
+function showObject(obj)
+{
+ var txt = "";
+ try {
+ if ( typeof obj != 'object' )
+ return "" + obj + '<BR/>';
+ else {
+ for(var key in obj) {
+ txt += key + ":";
+ txt += showObject( obj[key] );
+ txt += '<BR/>';
+ }
+ txt += '<BR/>';
+ }
+ }
+ catch (e)
+ {
+ alert("showObject: " + e);
+ }
+ return txt;
+}
+
+// Show the image to indicate the test result
+function showIMG(imgId, isOK)
+{
+ if(imgId == null || imgId == undefined)
+ return;
+
+ if(isOK == "yes")
+ document.getElementById(imgId).src = "pic/yes.png";
+ else if(isOK == "no")
+ document.getElementById(imgId).src = "pic/no.png";
+ else
+ document.getElementById(imgId).src = "pic/blank.png";
+}
+
+// Show elements in object by using 'alert'
+function testObject(obj)
+{
+ var msg = "";
+ for(var key in obj) {
+ msg = msg + ":" + key + "=" + obj[key];
+ }
+ alert(msg);
+}
+
+// Test whether the input is numeric
+function IsNumeric(sText)
+{
+ var ValidChars = "0123456789.";
+ var IsNumber=true;
+ var Char;
+
+ for (i = 0; i < sText.length && IsNumber == true; i++)
+ {
+ Char = sText.charAt(i);
+ if (ValidChars.indexOf(Char) == -1)
+ {
+ IsNumber = false;
+ }
+ }
+ return IsNumber;
+}
+// mediamanagement-sample.js
+//
+// In this sample the media objects and meta-data from the S60 Media
+// Gallery will be listed; Also, async operation will be canceled.
+//
+//SAPI Error Codes
+// 0 - Success
+// 1000 - InvalidServiceArgument
+// 1001 - UnknownArgumentName
+// 1002 - BadArgumentType
+// 1003 - MissingArgument
+// 1004 - ServiceNotSupported
+// 1005 - ServiceInUse
+// 1006 - ServiceNotReady
+// 1007 - NoMemory
+// 1008 - HardwareNotAvailable
+// 1009 - ServerBusy
+// 1010 - EntryExists
+// 1011 - AccessDenied
+// 1012 - NotFound
+// 1013 - UnknownFormat
+// 1014 - GeneralError
+// 1015 - CancelSuccess
+// 1016 - ServiceTimedOut
+// 1017 - PathNotFound
+
+
+// Declare the service object
+var so;
+
+// imgid for callback1 function
+var imgid_callback1;
+
+// id of the div used to display information
+const DIV_ID = 'mediaman';
+
+
+// Called from onload()
+function setup()
+{
+ try {
+ so = device.getServiceObject("Service.MediaManagement", "IDataSource");
+ console.info("setup: so: %s", so);
+ }
+ catch(e) {
+ alert('<setup> ' +e);
+ }
+}
+
+// Get List Async
+// This method retrieves a list of media objects and meta-data from the S60 Media Gallery.
+// In order to test this method make sure that there are media objects in the media Gallery.
+function getListAsync(imgId)
+{
+ // Setup input params using dot syntax
+ var criteria = new Object();
+ criteria.Type = 'FileInfo';
+ criteria.Filter = new Object();
+ criteria.Filter.FileType = 'Sound';
+ criteria.Sort = new Object();
+ criteria.Sort.Key = 'FileSize';
+
+ // set the image id for callback function
+ imgid_callback1 = imgId;
+
+ try {
+ // Media Management supports asynchronous call
+ var result = so.IDataSource.GetList(criteria, callback);
+ if(!checkError("IDataSource::getListAsync",result,DIV_ID,imgId))
+ showIMG(imgId,"");
+ }
+ catch (e) {
+ showIMG(imgId,"no");
+ alert ("getListAsync: " + e);
+ }
+}
+
+// This method cancels outstanding asynchronous request.
+function cancelGetListAsync(imgId)
+{
+ // Setup input params using dot syntax
+ var criteria = new Object();
+ criteria.Type = 'FileInfo';
+ criteria.Filter = new Object();
+ criteria.Filter.FileType = 'Sound';
+ criteria.Sort = new Object();
+ criteria.Sort.Key = 'FileSize';
+
+ // set the image id for callback function
+ imgid_callback1 = imgId;
+
+ try {
+ // Media Management supports asynchronous call
+ var result = so.IDataSource.GetList(criteria, callback);
+ if(!checkError("IDataSource::cancelGetListAsync",result,DIV_ID,imgId)){
+ showIMG(imgId,"");
+ var criteria2 = new Object();
+ criteria2.TransactionID = result.TransactionID;
+ var cresult = so.IDataSource.Cancel(criteria2);
+ checkError("IDataSource::cancelGetListAsync",cresult,DIV_ID,imgId);
+ }
+ }
+ catch (e) {
+ showIMG(imgId,"no");
+ alert ("cancelGetListAsync: " + e);
+ }
+}
+
+// This is the asynchronous callback handler
+function callback(transId, eventCode, result)
+{
+ console.info("callback: transId: %d eventCode: %d result.ErrorCode: %d", transId, eventCode, result.ErrorCode);
+ if(!checkError("IDataSource::getListAsync",result,DIV_ID,imgid_callback1)) {
+ document.getElementById(DIV_ID).innerHTML = showIterableList(result.ReturnValue);
+ }
+}
+