Thanks for your help.
I did visit the url you gave above, but unfortunately the sandbox did
not work.
Everytime I open the developer tools tab in iGoogle, FireBug notices
me that there are three errors occured:
1. gadgets.util is undefined
[Break on this error] gadgets.util.registerOnLoadHandler(init);
2. opensocial is not defined
[Break on this error] opensocial.Activity.Viewer = function
(activityDivName) {
3. opensocial is not defined
[Break on this error] activityviewer = new opensocial.Activity.Viewer
('messages');
Now, I'm really confused.
On 12月19日, 下午1时26分, Bill <[email protected]> wrote:
> I think that you missed sanbox sign up step.
> Did you visithttp://google.com/ig/sandbox?
> There are two verison of igoogle api. The one is Legacy API and the
> other is gadgets.io*(OpenSocialAPI).
> If you want to use gadgets.io* API and you don't live in USA, you
> should sign up iGoogle sandbox.
> If you visit again the upper URL, the sandbox will be turn on/off
> easily.
>
> Cheers,
> William
>
> On Dec 17, 5:28 pm, Sean <[email protected]> wrote:
>
> > Hi there, I'm a newbie of iGoogle and Gadget.
>
> > When I was trying my first gadget, an error of "gadgets.io" occured.
> > The code was coped directly from the "Working with Remote Content"
> > chapter of gadgets.* Developer's Guide, and I added it to my iGoogle
> > page through the GGE in the "Developer Tools" chapter. The whole code
> > is listed below:
>
> > <?xml version="1.0" encoding="UTF-8" ?>
> > <Module>
> > <ModulePrefs title="Fetch XML" scrolling="true"/>
> > <UserPref
> > name="mycalories"
> > display_name="Calorie limit"
> > default_value="800"/>
> > <UserPref
> > name="mychoice"
> > display_name="Show Descriptions"
> > datatype="bool"
> > default_value="false"/>
> > <Content type="html">
> > <![CDATA[
> > <div id="content_div"></div>
> > <script type="text/javascript">
> > // get prefs
> > var prefs = new gadgets.Prefs();
> > // Calorie limit set by user
> > var calorieLimit = prefs.getString("mycalories");
> > // Indicates whether to show descriptions in the breakfast
> > menu
> > var description = prefs.getBool("mychoice");
>
> > function makeDOMRequest() {
> > var params = {};
> > params[gadgets.io.RequestParameters.CONTENT_TYPE] =
> > gadgets.io.ContentType.DOM;
> > var url = "http://gadget-doc-examples.googlecode.com/svn/trunk/
> > opensocial-gadgets/breakfast-data.xml";
> > gadgets.io.makeRequest(url, response, params);
> > };
> > function response(obj) {
> > // Start building HTML string that will be displayed in
> > <div>.
> > // Set the style for the <div>.
> > var html = "<div style='padding: 5px;background-color:
> > #ccf;font-family:Arial, Helvetica;"
> > + "text-align:left;font-size:90%'>";
> > // Set style for title.
> > html +="<div style='text-align:center; font-size: 120%; color:
> > yellow; "
> > + "font-weight: 700;'>";
> > // obj.data contains a Document DOM element corresponding to
> > the
> > // page that was requested
> > var domdata = obj.data;
>
> > // Display menu title. Use getElementsByTagName() to retrieve
> > the <menu> element.
> > // Since there is only one menu element in the file,
> > // you can get to it by accessing the item at index "0".
> > // You can then use getAttribute to get the text associated
> > with the
> > // menu "title" attribute.
> > var title = domdata.getElementsByTagName("menu").item
> > (0).getAttribute("title");
>
> > // Alternatively, you could retrieve the title by getting the
> > menu element node
> > // and calling the "attributes" function on it. This returns
> > an array
> > // of the element node's attributes. In this case, there is
> > only one
> > // attribute (title), so you could display the value for the
> > attribute at
> > // index 0. For example:
> > //
> > // var title = domdata.getElementsByTagName("menu").item
> > (0).attributes.item(0).nodeValue;
>
> > html += title + "</div><br>";
> > // Get a list of the <food> element nodes in the file
> > var itemList = domdata.getElementsByTagName("food");
>
> > // Loop through all <food> nodes
> > for (var i = 0; i < itemList.length ; i++) {
> > // For each <food> node, get child nodes.
> > var nodeList = itemList.item(i).childNodes;
>
> > // Loop through child nodes. Extract data from the text nodes
> > that are
> > // the children of the associated name, price, and calories
> > element nodes.
> > for (var j = 0; j < nodeList.length ; j++) {
> > var node = nodeList.item(j);
> > if (node.nodeName == "name")
> > {
> > var name = node.firstChild.nodeValue;
> > }
> > if (node.nodeName == "price")
> > {
> > var price = node.firstChild.nodeValue;
> > }
> > if (node.nodeName == "calories")
> > {
> > var calories = node.firstChild.nodeValue;
> > }
> > // If the user chose to display descriptions and
> > // the child node is "#cdata-section", grab the
> > // contents of the description CDATA for display.
> > if (node.nodeName == "description" && description==true)
> > {
> > if (node.firstChild.nodeName == "#cdata-section")
> > var data = node.firstChild.nodeValue;
> > }
> > }
> > // Append extracted data to the HTML string.
> > html += "<i><b>";
> > html += name;
> > html += "</b></i><br>";
> > html += " ";
> > html += price;
> > html += " - ";
> > // If "calories" is greater than the user-specified calorie
> > limit,
> > // display it in red.
> > if(calories > calorieLimit) {
> > html += "<font color=#ff0000>";
> > html += calories + " calories";
> > html += " </font>";
> > }
> > else
> > html += calories + " calories";
> > html += "<br>";
> > // If user has chosen to display descriptions
> > if (description==true)
> > {
> > html += "<i>" + data + "</i><br>";
> > }
> > }
> > // Close up div
> > html += "</div>";
> > document.getElementById('content_div').innerHTML = html;
> > };
> > gadgets.util.registerOnLoadHandler(makeDOMRequest);
> > </script>
> > ]]>
> > </Content>
> > </Module>
>
> > But when I opened iGoogle page in FireFox 3.0.4, the FireBug gave me
> > the error message of "gadgets.Prefs is not a constructor errFunc()ifr?
> > url=...lYDDgg.js （行 8）[Break on this error] var prefs = new
> > gadgets.Prefs();".
>
> > Then I tried removing all the gadgets,* invoked except the gadgets.io,
> > but it still did not work with the error message "gadgets.io is
> > undefined".
>
> > Did I miss some key steps? Or do I have to refer to the gadgets.* lib
> > explicitly in my code?
>
> > Looking forward for your appreciated help.
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