Hi All,
My company has just started evaluating Wicket on an app that allows users to
select and merge multiple PowerPoint presentations.
We’ve hit a bit of a problem though, basically at the moment we have one long
form containing a number of section panels.
The section panels are either ‘multi select’ (a Panel containing a CheckGroup
that contains Check objects representing the PowerPoint presentations in that
section) or ‘single select’ (a Panel containing a RadioGroup that contains
Radio objects).
The problem happens when a validation failure occurs. Basically the checkboxes
that the user selected prior to the validation failure are remembered and
repopulated when the user is bounced back to the page but the radio buttons
that the user selected aren’t remembered.
Any help would be gratefully received, I’ve snipped out what I think are the
relevant bits of code below...
Thanks
Matt
FORM CODE:
______________
public class PresentationSelectionForm extends
Form<PresentationSelectionFormModel> implements Serializable
{
private static final long serialVersionUID = 5962930827736414107L;
final DownloadLinkPanel dlPanel =
DownloadLinkPanel.getEmptyLink("downloadLinkPanel");
final HiddenField<String> messageIndicator = new
HiddenField<String>("messageIndicator", new Model<String>("0"));
private List<PresentationSelector> selectors = new
ArrayList<PresentationSelector>();
@SpringBean
private AssetBankService assetBankService;
public PresentationSelectionForm(String name, List<Section> sections, final
PageParameters parameters)
{
super(name, new
CompoundPropertyModel<PresentationSelectionFormModel>(new
PresentationSelectionFormModel()));
add(new FeedbackPanel("feedback"));
add(dlPanel);
add(messageIndicator);
HiddenField<String> mandatorySections = new
HiddenField<String>("requiredSections", new
Model<String>(getIdListFromMandatorySections(sections)));
add(mandatorySections);
ListView<Section> sectionList = new ListView<Section>("sections",
sections)
{
private static final long serialVersionUID = 7480938703389583883L;
protected void populateItem(ListItem<Section> sectionItem)
{
sectionItem.add(new Label("sectionTitle",
sectionItem.getModelObject().getTitle()));
PresentationMultiSelectPanel multi = new
PresentationMultiSelectPanel("presentationMultiSelectPanel", sectionItem);
PresentationSingleSelectPanel single = new
PresentationSingleSelectPanel("presentationSingleSelectPanel", sectionItem);
selectors.add(multi);
selectors.add(single);
sectionItem.add(multi);
sectionItem.add(single);
}
};
sectionList.setReuseItems(true);
add(sectionList);
}
@Override
public void onSubmit()
{
//create the list of asset bank ids to merge from the panel input...
List<Long> assetBankAssetIds = new ArrayList<Long>();
for (PresentationSelector selector : selectors)
{
assetBankAssetIds.addAll(selector.getSelectedAssetBankAssetIds());
}
if (assetBankAssetIds.size() == 0)
{
error("Unable to complete merge, no presentations were selected.
Please select from the list then try again");
}
else if (!allMandatorySectionsAreCompleted())
{
error("Unable to complete merge, not all mandatory sections were
completed. Please complete all mandatory sections and try again");
}
else
{
try
{
File mergedPresentations =
assetBankService.getMergedPresentations(assetBankAssetIds);
addOrReplace(DownloadLinkPanel.getLinkToResourceFile("downloadLinkPanel",
mergedPresentations, "Download your file: "+mergedPresentations.getName()));
}
catch (IOException e)
{
throw new RuntimeException("Error merging presentations", e);
}
}
addOrReplace(new HiddenField<String>("messageIndicator", new
Model<String>("1")));
}
}
SINGLE SELECT PANEL CODE:
________________________
public class PresentationSingleSelectPanel extends Panel implements
PresentationSelector, Serializable
{
private static final long serialVersionUID = 7062146893868378278L;
private Section section;
final RadioGroup<Presentation> group = new
RadioGroup<Presentation>("presentationSingleSelectGroup");
public PresentationSingleSelectPanel(String id, ListItem<Section>
sectionItem)
{
super(id);
section = sectionItem.getModelObject();
ListView<Presentation> presentations = new
ListView<Presentation>("presentations",
sectionItem.getModelObject().getPresentations())
{
private static final long serialVersionUID = -2741478778745270525L;
protected void populateItem(ListItem<Presentation> presentationItem)
{
presentationItem.add(new Radio<Presentation>("presentation",
presentationItem.getModel()));
presentationItem.add(new Label("presentationLabel",
presentationItem.getModelObject().getName()));
presentationItem.add(new
PresentationThumbnailsPanel("presentationThumbnailPanel", presentationItem));
}
};
presentations.setReuseItems(true);
group.add(presentations);
add(group);
}
}
MULTI SELECT PANEL CODE:
________________________
public class PresentationMultiSelectPanel extends Panel implements
PresentationSelector, Serializable
{
private static final long serialVersionUID = 1024114105801324440L;
private Section section;
final CheckGroup<Presentation> multiGroup = new
CheckGroup<Presentation>("presentationMultiSelectGroup", new
ArrayList<Presentation>());
public PresentationMultiSelectPanel(String id, ListItem<Section>
sectionItem)
{
super(id);
section = sectionItem.getModelObject();
ListView<Presentation> presentations = new
ListView<Presentation>("presentations",
sectionItem.getModelObject().getPresentations())
{
private static final long serialVersionUID = 1397844164166900201L;
protected void populateItem(ListItem<Presentation> presentationItem)
{
presentationItem.add(new Check<Presentation>("presentation",
presentationItem.getModel()));
presentationItem.add(new Label("presentationLabel",
presentationItem.getModelObject().getName()));
presentationItem.add(new
PresentationThumbnailsPanel("presentationThumbnailPanel", presentationItem));
}
};
presentations.setReuseItems(true);
multiGroup.add(presentations);
add(multiGroup);
}
}
