Actually, the built-in select component will handle option groups, but you need to provide a custom SelectModel.
On Mon, Jul 23, 2012 at 3:13 PM, Carsten Klein <carsten.kl...@axn-software.de> wrote: > This should have gone to the mailing list so I will repost it here: > > > Hi Russell, > > see http://tapestry.apache.org/using-select-with-a-list.html for a > thorough explanation on how to do this. > > The problem I see in your approach is that you a an arbitrary number of > select components having the same name. Perhaps you should try and make > this a single component instead, where the group names are used for > grouping individual options, namely the users that belong to that group. > > E.g. > > Morgue Accessoires Sales Dep > John Doe > Frank Stein > Liquor Sales Dep > George Doubleu > John Wayne > > This is also supported by the HTML select element, using option groups. > > And, considering that this will render a single select element instead of > twenty, this will increase overall useability a lot. > > The standard select component does not support this, but you can always > extend upon that behaviour and implement your own custom component. > > Cheers > -- Carsten > >> I am trying to wrap my head around how to do this in tapestry. >> >> I have a form with 20 select components that are created with the loop >> component. >> >> Given a Map<Group, User> groupMap... >> >> Each select component's value (user) is a value in the map. >> >> Each label (group) for each select is the key of the map >> >> when a select components value has been changed, I want to update the map >> with it value. >> >> I understand that if this was just one select component I could just say >> something like OnChangeFromSelectID or a zone. >> >> But I'm trying to understand how to do this with 20 select components: >> >> TML: >> <table> >> >> <tr> >> <td colspan="2"> >> <label>Group</label> >> </td> >> </tr> >> <t:loop source="salesGroups" value="group" element="tr"> >> <td><t:label for="GroupName">${group.groupName}</t:label></td> >> <td><t:select t:id="GroupName" model="userModel" >> value="GroupUser" /></td> >> </t:loop> >> </table> >> >> PAGE CLASS?: >> public Object onGroupNameChange(User user) >> { >> groupMap.put(group, recipient); >> } >> >> >> I'm still new but i'm starting to get the hang of T5... >> Thanks! >> -Russell > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > -- Jonathan Barker ITStrategic --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
