Views content switchingSubmitted on 02 March 2012
In my last article, I definitely advised that when needing to radically change components displayed on the screen, you need to switch the main window’s contents - the view - and not the window itself.
Fortunately, this confusion is not possible anymore in Vaadin 7 since the application object and the main window are merged into the [UI] class.
UI instances have no root content (unlike Vaadin 6’s
Window): this means we have to set it explicitly, like the layout in the previous snippet.
As a corollary, this also means a
UI class has to be configured in the web deployment descriptor for the Vaadin servlet (and not an
Application class anymore). This directly translates into the following snippet:
Conclusion: Vaadin 7 is less confusing than Vaadin 6 for managing full-screen windows. Besides, it achieves the same result in as many lines of code: it’s a definite step toward cleaner windows management.
The archive that highlights the above code can be downloaded here.