Ajax CheckGroup problem exception: java.lang.IllegalStateException: No Page found for component

[Eyal Golan]

Hi,
I made a select-all check box inside a table.
I used the example from
http://javathoughts.capesugarbird.com/2007/09/ajax-select-all-checkbox-for-wicket.html
It works well in most cases.

Here's some code:

Adding the checkgroup to the panel:
    private void addCheckGroup() {
        checkGroup = new MyAjaxCheckBox("allChecked", new
PropertyModel(this, "allChecked")) {
            private static final long serialVersionUID = 1L;

            @Override
            protected void onUpdate(AjaxRequestTarget target) {
                final boolean isSelected = isChecked();
                if (isSelected) {
                    checkGroupModel.addAll(entitiesList);
                } else {
                    checkGroupModel.clear();
                }
                for (MyAjaxCheckBox check : checkboxes) {
                    check.setOutputMarkupId(true);
                    target.addComponent(check);
                }
                for (EntityWrapper entity : entitiesList) {
                    entity.setSelect(isSelected);
                }
//                target.addComponent(EntitiesPanel.this);
                EntitiesPanel.this.onUpdate(target);
            }
            @Override
            public boolean isVisible() {
                return (withSelect && entitiesList != null &&
entitiesList.size() > 0);
            }
        };
        checkGroup.setOutputMarkupId(true);
//        checkGroup.setVisible(false);
        add(checkGroup);
    }

The Checkbox column inside the table, and the fragment it uses:
    private AbstractColumn createCheckboxColumn() {
        AbstractColumn p = new AbstractColumn(new Model()) {
            private static final long serialVersionUID = 1L;

            public void populateItem(Item cellItem, String componentId,
IModel rowModel) {
                EntityWrapper confEntity = (EntityWrapper)
rowModel.getObject();
                Fragment frag = new CheckboxEntityFrag(componentId,
"checkboxFrag",
                        EntitiesPanel.this, confEntity);
                cellItem.add(frag);
            }
        };
        return p;
    }

        private CheckboxEntityFrag(String id, String markupId,
MarkupContainer markupProvider,
                final EntityWrapper value) {
            super(id, markupId, markupProvider);
            checkbox = new MyAjaxCheckBox("entityCheckbox", new
PropertyModel(value, "select")) {
                private static final long serialVersionUID = 1L;

                @Override
                protected void onUpdate(AjaxRequestTarget target) {
                    if (isChecked()) {
                        if (!checkGroupModel.contains(value))
                            checkGroupModel.add(value);
                    } else {
                        checkGroupModel.remove(value);
                    }
                    setAllChecked(checkGroupModel.size() ==
entitiesList.size());
                    checkGroup.setOutputMarkupId(true);
                    target.addComponent(checkGroup);
                    EntitiesPanel.this.onUpdate(target);
                }
            };
            add(checkbox);
            checkboxes.add(checkbox);
        }
    }

The problem:
someone else uses my panel for his purposes.
He has a page (search page) that has my panel (with the table and the
checkboxes).
His page has a navigation button - NEXT that uses setResponsePage.
The next page has a PREV button to go back.
Going back is also with setResponsePage WITH THE ORIGINAL one.

The scenario:
Open the search page (with my panel) - the 'select-all' work fine.
Press next.
Press back.

Press the 'select-all' again.
I get an exception: java.lang.IllegalStateException: No Page found for
component [MarkupContainer [Component id = entityCheckbox, page = <No Page>,
path = 1:cells:1:cell:entityCheckbox.EntitiesPanel$CheckboxEntityFrag$1]]

Is there something in a page's component's life cycle that I'm missing?

Hope it's clear.

(I'll be away for a few days so bare with me if I'm not answering)

Thanks
-- 
Eyal Golan
[EMAIL PROTECTED]

Visit: http://jvdrums.sourceforge.net/