Be careful, this method can only help to read the preferences but the JS code in the iframe will be unable to modify the preferences.
2010/4/22 Gavin McDonald <[email protected]> > Rob, > > This is an acceptable method to restore service to my broken gadget, and > thanks to your team for being proactive to find a solution. > > Regards, > -G > > Gavin McDonald > EVI Logistic Enterprises > 604-313-3845 - VE7HXR > > > > On Wed, Apr 21, 2010 at 7:02 PM, Rob Russell <[email protected]>wrote: > >> I spent some time today, with the help of other developers on the iGoogle >> team, coming up with a way to adapt an arbitrary gadget that relies on the >> way user prefs used to be supplied with the url in type="url" gadgets. A >> gadget ideally only needs the gadget API, and shouldn't rely on the way >> iGoogle sends (or doesn't send) parameters in the URL query string. >> >> Keep in mind that what I'm suggesting is just one way to adapt such a >> gadget, it's up to individual gadget developers to detemine what works for >> them. I have used this to adapt one of the reported gadgets and it seems to >> work fine. >> >> The crux of the idea is that instead of supplying an external page to >> wrap, we use a type=html gadget and request the page that we want wrapped >> after the gadget loads. The wrapping gadget will be cached by iGoogle. You >> can consider this code a template and adapt it if you'd like to include a >> loading animation or message for the user in case your server takes some >> time to respond. >> >> I've tested this with sample data in IE6 on Windows and on Firefox. It is >> just an example though and I encourage anyone that sees room for improvement >> to chime in. >> >> The UserPrefs elements are the same as for the existing Content type=url >> section, as are the Module and ModulePrefs elements. >> >> In the Javascript, the wrappeduserprefs variable is an array of the values >> of name attributes from the UserPref elements. So for this pretend gadget, >> it has prefs myname and mycolor. The type of the UserPref doesn't matter. >> The wrappedpage variable is the url of the page that your Content type=url >> gadget pointed at - that is the value of the href attribute on the Content >> element. >> >> If your server code doesn't need the "up_" prefix on the parameter name >> then change (most will but it could be a chance to clean up some server side >> cruft) >> params["up_"+userprefs[key]] = prefs.getArray(userprefs[key]); >> to >> params[userprefs[key]] = prefs.getArray(userprefs[key]); >> >> Here's the code >> >> <?xml version="1.0" encoding="UTF-8"?> >> <Module> >> <ModulePrefs title="example url iframed" /> >> <UserPref name="myname" display_name="Name" default_value=""/> >> <UserPref name="mycolor" display_name="Color" default_value="Red" >> datatype="enum" > >> <EnumValue value="Red" /> >> <EnumValue value="Blue" /> >> </UserPref> >> <Content type="html"> >> <![CDATA[ >> <script type="text/javascript"> >> var wrappedpage = "http://example.com/mygadget.php";; >> var wrappeduserprefs = ["myname","mycolor"]; >> >> var prefs = new gadgets.Prefs(); >> var params = {}; >> >> function init() { >> for (key in wrappeduserprefs) { >> params["up_"+wrappeduserprefs[key]] = >> prefs.getArray(wrappeduserprefs[key]); >> } >> >> document.getElementById("wrapped").src = wrappedpage + "?" + >> gadgets.io.encodeValues(params); >> } >> >> gadgets.util.registerOnLoadHandler(init); >> </script> >> <style> >> body { >> margin: 0; >> padding: 0; >> overflow: hidden; >> } >> </style> >> <iframe src="" name="wrapped" id="wrapped" width="100%" height="200px" >> style="border:none; margin:0; overflow:hidden; padding:0;" scrolling="no" >> frameborder=0 > >> </iframe> >> ]]> >> </Content> >> </Module> >> >> >> Rob Russell >> Google Developer Relations >> >> -- >> You received this message because you are subscribed to the Google Groups >> "iGoogle Developer Forum" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<google-gadgets-api%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/Google-Gadgets-API?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "iGoogle Developer Forum" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-gadgets-api%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/Google-Gadgets-API?hl=en. > -- You received this message because you are subscribed to the Google Groups "iGoogle Developer Forum" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/Google-Gadgets-API?hl=en.
