I have a LinkTree with BookmarkablePageLinks, wherein the nodes correspond to
different types of objects. The models within the nodes tell me what kind
of page I need to instantiate, with what parameters. I had some troubles
implementing it, but I got it working. Since this kind of pattern is common
within UIs and I have been helped on other occasions by people here, I'm
posting what I figured out in order to give back to the community.
public class MyLinkTree extends LinkTree
{
public MyLinkTree(String id, TreeModel model)
{
super(id, model);
setLinkType(
org.apache.wicket.markup.html.tree.BaseTree.LinkType.REGULAR );
}
@Override
protected Component newNodeComponent( String id, IModel model )
{
return new LinkIconPanel( id, model, MyLinkTree.this )
{
private static final long serialVersionUID = 1L;
@Override
protected void addComponents( final IModel model, final BaseTree
tree )
{
final Object obj = ( ( DefaultMutableTreeNode
)model.getObject() ).getUserObject();
BaseTree.ILinkCallback callback = new
BaseTree.ILinkCallback()
{
private static final long serialVersionUID = 1L;
public void onClick( AjaxRequestTarget target )
{
PageParameters params = new PageParameters();
if ( obj instanceof BeanA )
{
target.appendJavascript("window.location="+MyLinkTree.this.urlFor(
PageA.class, params ) );
}
else if ( obj instanceof BeanB )
{
params.add( "myParamKey", "myParamVal" );
target.appendJavascript("window.location="+MyLinkTree.this.urlFor(
PageB.class, params ) );
}
}
};
MarkupContainer iconContainer = tree.newLink( "iconLink",
callback );
iconContainer.add(newImageComponent("icon", tree, model));
add( iconContainer );
PageParameters params = new PageParameters();
if ( obj instanceof BeanA )
{
final BeanA myBean = ( BeanA )obj;
BookmarkablePageLink contentLink = new
BookmarkablePageLink( "contentLink", PageA.class, params );
contentLink.add( new Label( "content",
myBean.toString() )
);
add( contentLink );
}
else if ( obj instanceof BeanB )
{
final BeanB myBean = ( BeanB )obj;
params.add( "myParamKey", "myParamVal" );
BookmarkablePageLink contentLink = new
BookmarkablePageLink( "contentLink", PageB.class, params );
add( contentLink );
}
}
};
}
}
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