In my example this is caught by the following in SingleSelectionManager, which traps setting the selected value to be itself - http://code.google.com/codesearch#T04cSGC7sWI/trunk/user/src/com/google/gwt/view/client/SingleSelectionModel.java&q=abstractselectionmodel%20package:http://google-web-toolkit%5C.googlecode%5C.com&l=106
However, Jens raises a very good point about the potential downside of this approach. Chris On Thu, Mar 1, 2012 at 2:23 PM, Shaun Tarves <sh...@tarves.net> wrote: > @Thomas - In the example you pointed me to, what prevents this from > essentially creating an infinite loop? OnSelectionChange fires a new history > event. The history handler responds, gets info and changes the selection, > which would in turn fire a new history event. No? > > @Chris - I think it's the same situation...your selection handler fires a > new place, which selects and item, which would in turn fire a new place > request. Right? > > Am I missing something here? > > > On Thu, Mar 1, 2012 at 5:14 AM, Jens <jens.nehlme...@gmail.com> wrote: >> >> You may also want to >> read: https://groups.google.com/d/topic/google-web-toolkit/dTwvMbxlFgI/discussion >> >> Its not directly related to your problem but as you are firing place >> changes by listening on the selection model it could happen that your UI may >> gets inconsistent. This can happen if you use Activity.mayStop() to provide >> warning messages and the user chooses to cancel a place change. Without >> considering this case your list will have the new item selected (because you >> clicked on it and CellList updates the selection model) while your details >> view still shows the old item (because the user cancels the place change). >> >> -- J. >> >> >> Am Mittwoch, 29. Februar 2012 14:30:21 UTC+1 schrieb Shaun Tarves: >>> >>> 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/-/McTGZk-A6DQJ. >> >> To post to this group, send email to google-web-toolkit@googlegroups.com. >> To unsubscribe from this group, send email to >> google-web-toolkit+unsubscr...@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+unsubscr...@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+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
