Hi Alejandro,
I don't fully understand the question. ListButton doesn't currently have a
"render" property - what would this property do?
Note that you can instantiate your renderer in a define block and then refer to
it elsewhere. This may help reduce the verbosity of your markup:
<bxml:define>
<renderers:CustomItemRenderer bxml:id="customItemRenderer"/>
</bxml:define>
...
<ListButton itemRenderer="$customItemRenderer"/>
Note that this is also supported in WTKX in Pivot 1.5 - you don't need to wait
for 2.0 to do this.
Hope this helps.
Greg
On Aug 2, 2010, at 1:10 PM, Alejandro Vilar wrote:
> Hi again,
> Related to all renderers in pivot bxml files, it will possible to use a some
> kind of reflection to render some data? (specially with text type data)
>
> For example:
>
> <ListButton render="${name} - ${address}"/>
>
> And use reflection to get fields inside curly brackets, also it will be
> helpful with resources files to customize rendered data by a custom
> localization:
>
> <ListButton render="%renderers.customer"/>
>
> In my current project we have about 15 POJOs with list, data and table
> renderers each one.
>
> <ListButton>
> <dataRenderer>
> <renderers:CustomerButtonRenderer/>
> </dataRenderer>
> <itemRenderer>
> < renderers:CustomerItemRenderer/>
> </itemRenderer>
> </ListButton>
>
> It’s a little verbose…
>
>
> Regards,
> Alejandro
>
> From: Alejandro Vilar [mailto:[email protected]]
> Sent: lunes, 02 de agosto de 2010 12:47 p.m.
> To: [email protected]
> Subject: RE: ListButton - Is it the correct way?
>
> Hi Stefano,
>
> Your approach works well because "toString" method only be called when a
> customer is painted, but it doesn’t avoids some possible side effects in the
> rest of your code(i.e. logging). Another way is to use renderers as follows:
>
> import org.apache.pivot.wtk.Button;
> import org.apache.pivot.wtk.content.ButtonDataRenderer;
>
> public class CustomerDataRenderer extends ButtonDataRenderer {
> @Override
> public void render(Object data, Button button, boolean highlighted) {
> super.render(data, button, highlighted);
> if (data instanceof lbtCustomer) {
> lbtCustomer customer = (lbtCustomer) data;
> super.label.setText(customer.getName() + "-" + customer.getAddress());
> }
> }
> }
>
> Also you can keep the computed name inside a variable in your lbtCustomer
> instance to compute it just once. To setup this renderer in your ListButton:
>
>
> ListButton listButton = new ListButton(customers);
> listButton.setDataRenderer(new CustomerDataRenderer());
> listButton.setItemRenderer(new CustomerItemRenderer()); //<-- same as data
> renderer, but extending from ListViewItemRenderer
>
> If you want get the chosen record:
>
> lbtCutomer selectedCustomer =
> (lbtCutomer)listButton.getSelectedItem();
>
> I’ll suggest override equals method in your lbtCustomer class, some list
> abilities are based on it.
>
> Hope this helps,
>
> Alejandro
>
>
> From: Dr. Stefano Sancese [mailto:[email protected]]
> Sent: lunes, 02 de agosto de 2010 11:20 a.m.
> To: [email protected]
> Subject: ListButton - Is it the correct way?
>
> Hi to all,
>
> in a form, I have a ListButton that I need to populate with 1000 customers
> data (Id, Name, Address).
>
> I wrote this class:
>
> class lbtCustomer {
> private String id;
> private String name;
> private String address;
>
> lbtCustomer(String c1, String c2, String c3) {
> id = c1;
> name = c2;
> address = c3;
> }
>
> public String getKey() {
> return id;
> }
>
> @Override
> public String toString() {
> return name + " - " + address;
> }
> }
>
> and I populated the ArrayList of the ListButton with:
>
> ArrayList lbtValues = new ArrayList();
>
> lbtCustomer r1 = new lbtCustomer("1","John Doe","New York");;
> lbtCustomer r2 = new lbtCustomer("8","Charlie Brown","Los Angeles");
> lbtCustomer r3 = new lbtCustomer("2","Donald Duck","Orlando");
> lbtCustomer r4 = new lbtCustomer("9","Snoopy","Los Angeles");
>
> lbtValues.add(r1);
> lbtValues.add(r2);
> lbtValues.add(r3);
> lbtValues.add(r4);
>
> listButtonTest.setListData(lbtValues);
>
> With the toString method I can format the information showed to the user and
> with the getKey method I can retrieve the Id of the chosen record.
>
> The test case works, but I wonder if there is a better way.
>
> I'm concerned about the cost (CPU and memory) associated with the
> instantiation of the 1000 objects that I need for the real case.
>
> Perhaps two array lists: one with the data to show to the user and the other
> to store the id of the corresponding Customer?
>
>
> Ciao
>
> Stefano
>
>
> P.s. I'm realy green to java and - YES - I'm Reading the F...... Manuals.
> There are simply too many of them ;-)
>
> --
> Dr. Stefano Sancese
>
> WatchGuard Certified System Professional - http://www.watchguard.com
> Socio Clusit - Associazione Italiana per la Sicurezza Informatica
>
> ************************************************************************
>
> In God we trust, all others we monitor (National Security Agency)
>
> ************************************************************************
