How to observe view load in SmartGWT ViewLoader?

[maksymg]

Hi,

I can't find a way to attach to the on View Load event for ViewLoader in SmartGWT.
The javadoc comments for viewLoaded() method is unclear as well. Can you provide a sample on how to observe on View Load event in SmartGWT.

ViewLoader pageLoader = new ViewLoader();
pageLoader.setViewURL(myURL);
pageLoader.viewLoaded(pageLoader);

Canvas pageTop = new Canvas(pageLoader.getJsObj());

-- Canvas cnButton = Canvas.getById("Button1"); //return null - the button is defined inside the loaded page but is not available in this line - view is not loaded yet

final Window winModal = new Window();
....
winModal.addItem(pageTop);
winModal.show();

Comments to the code:
- Unclear why to call pageLoader.viewLoaded(pageLoader); - it supposed to be called on view load asynchronously not directly by my code??? But without it it doesn't work
- I can't access cnButton that is inside the page

I saw a couple references on Class.observe() from SmartClient, but it's not available in SmartGWT API

Thanks