As a ASP.NET developer, we are also migrating our apps to GWT. Knowing
someone who has gone through this already, will really help. Any pointers
for an ASP.NET developer as I make my transition to GWT?
On Thursday, April 15, 2010 7:21:18 PM UTC-4, DrG wrote:
>
> I am developing a website and have a what might be relatively easy
> question for a GWT native. The question surrounds how to create and
> initialise objects within GWT. I am a former ASP.Net developer so my
> questions are along the lines of how I do something I would have
> previously done in that framework in the new GWT format.
>
> *** Question
> Well, if I have a GWT application which consists of one
> Application.Html file which is the holder for the application. This
> translates to one EntryPoint and one "Main" application module. Now
> if this application consists of various visual elements which can be
> shown according to the interactions of the user then where is the best
> place to instantiate and initialise these objects.
>
> For instance if I have a MenuHeader UI Declarative objects and a
> SideMenu Object and a MainArea object. These are all rendered at
> start up in the EntryPoint module. Now the MainArea object could
> display say 20 different other objects depending on what the user is
> doing in the application, and the choice of object displayed is
> dependent on the users selections in other child objects. My question
> surrounds on the best way of handling this interaction.
>
> *** Solution 1: Bubble events up to Main Application Module
> Do I implement an event bubbling mechanism where events are raised up
> the main level and then objects are instantiated there and rendered
> accordingly?
>
> *** Solution 2: Pass listeners to child objects
> In the mail application supplied by Google they add this code in the
> entry point module:
> // Listen for item selection, displaying the currently-selected
> item in
> // the detail area.
> mailList.setListener(new MailList.Listener() {
> public void onItemSelected(MailItem item) {
> mailDetail.setItem(item);
> }
> });
>
> So does this mean for every event I would expect then in the Main
> module I have to create a listener?
>
> *** Solution 3: Something I am not aware of.
> Solutions 1 and 2 do not seem to be good solutions for large
> applications so is there something I am not aware of that GWT does or
> some coding practice that someone else can suggest.
>
> There maybe a good open source application I can refer to that deals
> with this problem so any links to good examples are warmly welcomed.
>
> Regards
> Gene Conroy-Jones
> www.sohoappspot.com
>
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