Here's Tapestry's implementation of GridDataSource for Collections: https://github.com/apache/tapestry-5/blob/trunk/tapestry-core/src/main/java/org/apache/tapestry5/internal/grid/CollectionGridDataSource.java
That implementation works with any class, but you can write a special one that works with just Material instances. In your implementation of the prepare method<https://github.com/apache/tapestry-5/blob/trunk/tapestry-core/src/main/java/org/apache/tapestry5/internal/grid/CollectionGridDataSource.java#L44>, you can do whatever special sorting you want to do, based on your Material instance and anything else you'd like to consult. You can also create a new one-off class just for the rows of your Grid--a class that wraps a Material, ValorAtributo, and Atributo tuple, for example. You'll probably need to create a complex Comparator that wraps the one based on the PropertyConduits associated with incoming SortConstraints--it depends on whether you want to augment the existing sorts that available or replace them completely. If you do need a complex ordering, Google's Guava library has an Ordering class as well as ComparisonChain both of which are well-suited for rich Comparators. Best of luck, - P On Fri, Aug 10, 2012 at 1:14 PM, William Lopes <williamlopes....@gmail.com>wrote: > I didn't want say that "implement a Grid", sorry. > > I need of an example functional, the data comes from a list of > ValorAtributo (a type of data) of the class Material, this last, is the > source of the grid. > > Basically, I have 3 classes, Material (makes the link of the Atributo and > ValorAtributo), Atributo (type of data dynamic), ValorAtributo (value of > the type data previous), the my grid is formed by list of Material, where > have a list of ValorAtributo. And with this list of ValorAtributo, is > possible check if you wanna that appear in the grid. So, I need implement > manually a way of sort for it. > > I still very newbie with tapestry, cause this I would like of example more > explicit. > > Can you undestand me? > > 2012/8/9 Thiago H de Paula Figueiredo <thiag...@gmail.com> > > > On Thu, 09 Aug 2012 19:59:45 -0300, William Lopes < > > williamlopes....@gmail.com> wrote: > > > > Yes, I want do sort by myself, could you give a example of > GridDataSource > >> implementing a Grid? > >> > > > > You don't implement a Grid: it's a component. You can implement > > GridDataSource, which is an interface. > > How to implement it depends on where the data comes from: a collection > > created in memory? Data from a database? All you need to know is in the > > JavaDoc of the interface anyway. :) Any doubts, just ask. ;) > > > > > > -- > > Thiago H. de Paula Figueiredo > > > > ------------------------------**------------------------------**--------- > > To unsubscribe, e-mail: users-unsubscribe@tapestry.**apache.org< > users-unsubscr...@tapestry.apache.org> > > For additional commands, e-mail: users-h...@tapestry.apache.org > > > > >
