On Thu, May 27, 2010 at 3:55 PM, sahuja <[email protected]> wrote:
>
> Jeremy, I am not really sure what you mean by using a model that gets the
> columns on every repaint, but here's how I have changed my code now.
>
> public TotalsToolbar(final DataTable table, final IModel
> dataProviderModel)
> {
> super(table);
>
> WebMarkupContainer totals = new WebMarkupContainer("totals");
> add(totals);
>
> AbstractReportingBean row =
> (AbstractReportingBean)dataProviderModel.getObject();
>
> List<String> totalList = new ArrayList<String>();
> final IColumn[] columns = table.getColumns();
> for (int i = 0; i < columns.length; i++)
> {
> final IColumn column = columns[i];
> String val =
> row.getStringForFieldNamed(column.getSortProperty());
> if (val == null || val.length() == 0) {
> val = " ";
> }
> totalList.add(val);
> }
>
> ListView listView = new ListView("total", totalList){
> protected void populateItem(ListItem item) {
> String totalItem = (String) item.getModelObject();
> item.add(new Label("value",
> totalItem.getValue()).setEscapeModelStrings(false));
> }
> };
>
> totals.add(listView);
> return;
> }
>
> I changed the way I was creating my toolbar to use a model wrapped around
> the data.
>
> public GrandTotalsDataTable(String id, final List columns,
> ISortableDataProvider sortableDataProvider, IDataProvider
> dataProvider,
> int rowsPerPage)
> {
> super(id, columns, sortableDataProvider, rowsPerPage);
> addBottomToolbar(new TotalsToolbar(this,
> dataProvider.model(dataProvider.iterator(0, 1).next())));
> }
>
> And, here is my markup for the TotalsToolbar:
> <wicket:panel>
> <tr>
> [span wicket:id="totals">
> <td wicket:id="total">
> [span wicket:id="value">[amount][/span>
> </td>
> [/span>
> </tr>
> </wicket:panel>
>
> (Changing the '<' before span tags to display it).
>
> BTW, I tried to put breakpoints like you suggested, but interestingly when
> I
> hit F5, the debugger doesn't hit any of my code. I do see the table being
> updated though...
>
This is the whole point. You are only constructing that list of values when
the table is instantiated - which only happens on the initial view. This is
why you don't hit breakpoints when you click a navigation link.
Understanding this is key to using Wicket correctly - so make sure that by
the end of this exercise you have learned enough to understand what I'm
saying.
In your constructor, you are creating a list of values. This is wrong.
Instead, you need to do this:
IModel<List<String>> model = new LoadableDetachableModel<List<String>>() {
List<String> load() {
// move all of that list generation code here so that it is re-created
on every request
}
};
new ListView("idhere", model) {
// populateItem, etc goes here
}
--
Jeremy Thomerson
http://www.wickettraining.com
