Re: Dynamic tab question - now to pass a model to the panel?

[msj121]

I don't quite understand the problem... some code might help. But why can't
you do something like the following:

tabs.add(new AbstractTab(item.getModel()) {
 public Panel getPanel(String panelId) {
 return new AlbumPanel(panelId, );// can be item.getModelObject() or
something
 }
}); 

The above assumes your inside some sort of Wicket Repeater (I assumed this
as you mentioned it was dynamic). Like I said, some more code might help.

nimmy wrote:
 
 Hi all,
 
 I'm having a bit of confusion with dynamic tabs and would appreciate your
 help.
 
 My page has a LDM model. The model wraps an AlbumGroup object, which has a
 list of Album objects.
 
 I'm creating a tab for each Album object by extending AbstractTab. I'm
 passing in a ModelAlbum as a constructor to the tab. This model is used
 to set the title of the tab and should also be used to populate the
 contents of the tab panel.
 
 How can I pass the ModelAlbum to the tab Panel?
 
 I don't think I can hold the model as an instance variable in the Tab
 until the getPanel() method is called as detach will never be called on
 the LDM.
 
 I cannot simply implement the IDetachable interface because AbstractTab is
 not a component and detach will not be called on it.
 
 Am I overthinking the LDM?
 
 Cheers,
 Nim
 
 

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Re: Dynamic tab question - now to pass a model to the panel?

[nimmy]

Hi,

Thanks for your reply. I'm pretty much doing what you suggested but have a
concrete Tab class as it is reused on another page:

public class AlbumTab extends AbstractTab {

private static final long serialVersionUID = 1L;
private IModelAlbum model;

public AlbumTab(IModelAlbum model) {
super(new PropertyModelString(model, name));
this.model = model;
}

@Override
public Panel getPanel(String id) {
return new TabPanel(id, model);
}
}

The Page has a hibernate backed LoadableDetachableModel - AlbumGroup.
AlbumGroup has a list of Albums. I iterate through the list and create a tab
for each Album and create a tabbed panel:

//create a tab for each album
ListITab tabs = new ArrayListITab();
for (Album album: model.getObject().getAlbums()) {
ITab tab = new AlbumTab(new ModelAlbum(album));
tabs.add(tab);
}
add(new TabbedPanel(content-tabs, tabs));

My confusion was/is on who calls detach() on the LDM. Each tab will have a
reference to the LDM.

I am now setting the LDM as the default model for the page (even though the
page does not use it). My reasoning is that once the page is Serialised, it
will call detach() on the LDM.


Any thoughts on my approach?
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Re: Dynamic tab question - now to pass a model to the panel?

[msj121]

the method .detach() or some variation should be called on every Loadable
Detachable Model (LDM) if your model is being used as a default model to any
component in the page hierarchy. To make this LDM your page model, I think
there is a trick in the sense you should call super(model), and not just
set the page's default model. It should be detached automatically.

The best way is probably to test the code with a breakpoint or override the
method and print with log4j or something

Sorry I misunderstood the question.

Matthew
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