Wednesday, February 29, 2012

Re: Selecting list items from history actions using Activities and Places

I thought singleselectionmodel swallowed setting the selected value to itself?

On 29 Feb 2012 16:29, "Shaun Tarves" <shaun@tarves.net> wrote:
Hi all -

First off, thanks for all the great info on this board. I've gotten so much out of it. However, I'm having a problem I haven't seen addressed before. Here's my scenario:

1) I have 2 places, 2 separate activity managers/mappers (one for a "menu" display area and one for "content" display area).

2) In the menu area is a basic CellList, with an attached selection handler that fires an event registered on the app's event bus to go to a new place. It also naturally "selects" the item in the menu.

Selection of items/going to new places works naturally when the user is clicking around. 

My problem:

When any history action is involved (via a direct URL or using back/forward in the browser), how to I handle selecting the appropriate item in the menu?

The obvious choice is a place change handler in the menu, which, in turn, uses the menu's selection handler to select the appropriate item. BUT, since the selection handler fires an event to go to a new place upon selection, it introduces circular logic. (onPlaceChange does setSelected, then onSelection fires an event to change places)

It's disconcerting that none of the sample apps (expenses, mobilewebapp) do any kind of item selection when you navigate DIRECTLY to a place via URL, but this seems like a really basic feature of a web application.

Thoughts?

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/kLEBTO6gJuIJ.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.

No comments:

Post a Comment