From Ajax Patterns

Code Example

A standard initialisation library function sets up gadget title and colour scheme for the main element, which is passed in.

   var prefs = new _IG_Prefs();
   function pref(id) { return prefs.getString(id); }

   function adjustHeight() { if (_IG_AdjustIFrameHeight) _IG_AdjustIFrameHeight(); }
   function setTitle(title) { if (_IG_SetTitle) _IG_SetTitle(title); }
   function initialiseStandardPrefs(mainEl) {
     mainEl.style.background = pref("backgroundColour");
     mainEl.style.color = pref("textColour");
     adjustHeight();
     setTitle(pref("title"));
   }

Gadgets must declare these preferences. A Gadget Factory can be used to keep it DRY. e.g. http://ajaxify.com/run/widgets/opensuite/message/message.xml

 <UserPref name="title" display_name="Title" default_value="Message" />
 ...
 <UserPref name="backgroundColour" display_name="Background Colour"
           default_value= "white" />
 <UserPref name="textColour" display_name="Text Colour"
           default_value= "black" />

We invoke the library function on gadget startup.

 initialiseStandardPrefs($("message"));