在我的 Wicket 页面上，我有一个带有几个 TextField 的表单和一个分页的复选框列表 iplemenet 以及数据视图和一个数据提供者。我使用了 Checkgroup 这个例子。
我在下面列出了我的来源。问题是，当我在第 1 页上选择一些项目，然后转到第 2 页，然后使用 AjaxPagingNavigator 返回到第 1 页时，选择丢失：在第 1 页上选中的项目最初没有“复选标记” “不再。当使用 AjaxPagnigaion 遍历列表时，我应该怎么做才能使页面上选择的项目不会丢失？
public final class AjaxFormWithPaginatedCheckBoxPage extends BasePage {
static Logger logger = Logger.getLogger(AjaxFormWithPaginatedCheckBoxPage.class);
private Person person = new Person();
int counter = 0;
WebMarkupContainer webMC;
static List<Person> pList=Person.getPersons(100);
int maxListCount=5;
DataView dv;
CheckGroup group;
public AjaxFormWithPaginatedCheckBoxPage() {
super();
final Form form = new Form("form", new CompoundPropertyModel(person)) {
protected void onSubmit() {
logger.info("form recived");
logger.info(" person name " + person.getName());
setResponsePage(new AjaxTogglePanelTestPage());
}
};
final TextField name = new TextField("name");
final TextField age = new TextField("age");
form.add(name);
form.add(age);
group=new CheckGroup("group", new ArrayList());
form.add(group);
webMC= new WebMarkupContainer("webMC");
webMC.setOutputMarkupId(true);
//PersonDataProvider personDataProvider= new PersonDataProvider();
SortablePersonDataProvider personDataProvider=new SortablePersonDataProvider(pList);
dv = new DataView<Person>("persons", personDataProvider) {
@Override
protected void populateItem(Item<Person> item) {
//AttributeModifier am = new AttributeModifier("src", true, item.getModel());
//item.add(new Radio("radio", item.getModel()));
item.add(new Check("check", item.getModel()));
item.add(new Label("id", new PropertyModel(item.getModel(), "id")));
item.add(new Label("name", new PropertyModel(item.getModel(), "name")));
item.add(new Label("age", new PropertyModel(item.getModel(), "age")));
}
};
dv.setItemsPerPage(maxListCount);
webMC.add(new AjaxFallbackOrderByBorder("orderByID", "id", personDataProvider)
{
@Override
protected void onSortChanged()
{
dv.setCurrentPage(0);
}
@Override
protected void onAjaxClick(AjaxRequestTarget target) {
target.addComponent(webMC);
}
});
webMC.add(new AjaxFallbackOrderByBorder("orderByName", "name", personDataProvider)
{
@Override
protected void onSortChanged()
{
dv.setCurrentPage(0);
}
@Override
protected void onAjaxClick(AjaxRequestTarget target) {
target.addComponent(webMC);
}
});
webMC.add(new AjaxFallbackOrderByBorder("orderByAge", "age", personDataProvider)
{
@Override
protected void onSortChanged()
{
dv.setCurrentPage(0);
}
@Override
protected void onAjaxClick(AjaxRequestTarget target) {
target.addComponent(webMC);
}
});
webMC.add(dv);
webMC.add(new AjaxPagingNavigator("navigator",dv));
group.add(webMC);
AjaxButton ab = new AjaxButton("ajax-button", new PropertyModel<String>(this,
"counter"), form) {
@Override
protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
counter++;
logger.info("ajx form recived");
logger.info("ajx person name " + person.getName());
target.addComponent(this);
}
};
form.add(ab);
form.setDefaultButton(ab);
add(form);
}
}
好的 - 这是基于以下答案的更新和工作解决方案代码。谢谢。
public final class AjaxFormWithPaginatedCheckBoxPage extends BasePage {
static Logger logger = Logger.getLogger(AjaxFormWithPaginatedCheckBoxPage.class);
private Person person = new Person();
int counter = 0;
WebMarkupContainer webMC;
static List<Person> pList=Person.getPersons(100);
int maxListCount=5;
DataView dv;
Set<Person> selectedPersons= new HashSet<Person>();
public AjaxFormWithPaginatedCheckBoxPage() {
super();
final Form form = new Form("form", new CompoundPropertyModel(person)) {
protected void onSubmit() {
logger.info("form recived");
logger.info(" person name " + person.getName());
for(Person p: selectedPersons){
logger.info(" selected "+ p.getName());
}
setResponsePage(new AjaxTogglePanelTestPage());
}
};
final TextField name = new TextField("name");
final TextField age = new TextField("age");
form.add(name);
form.add(age);
//group=new CheckGroup("group", new ArrayList());
//form.add(group);
/*
group.add(new AjaxFormChoiceComponentUpdatingBehavior(){
@Override
protected void onUpdate(AjaxRequestTarget target) {
logger.info(" AjaxFormChoiceComponentUpdatingBehavior invoked .. ");
target.addComponent(webMC);
}
});
*/
webMC= new WebMarkupContainer("webMC");
webMC.setOutputMarkupId(true);
//PersonDataProvider personDataProvider= new PersonDataProvider();
SortablePersonDataProvider personDataProvider=new SortablePersonDataProvider(pList);
dv = new DataView<Person>("persons", personDataProvider) {
@Override
protected void populateItem(final Item<Person> item) {
//item.add(new Check("check", item.getModel()));
AjaxCheckBox ajc=new AjaxCheckBox("check", new PropertyModel(item.getModel(), "id")) {
@Override
protected void onUpdate(AjaxRequestTarget art) {
logger.info("onupdate called");
String value=getValue();
if(value==null){
logger.info("dunno what to do ..");
throw new IllegalArgumentException(" ajax check box returned null");
}
Person op=((Person)(item.getDefaultModelObject()));
logger.info("person "+ op.getName() +" was "+ person.isSelected() );
boolean bret= Strings.isTrue(value);
if(bret==false){
logger.info(" ... UN-selected");
//((Person)(item.getDefaultModelObject())).setSelected(false);
selectedPersons.remove(op);
}
else{
logger.info("....selected");
//((Person)(item.getDefaultModelObject())).setSelected(true);
selectedPersons.add(op);
}
}
};
item.add(ajc);
item.add(new Label("id", new PropertyModel(item.getModel(), "id") ) );
item.add(new Label("name", new PropertyModel(item.getModel(), "name")));
item.add(new Label("age", new PropertyModel(item.getModel(), "age")));
}
};
dv.setItemsPerPage(maxListCount);
webMC.add(new AjaxFallbackOrderByBorder("orderByID", "id", personDataProvider)
{
@Override
protected void onSortChanged()
{
dv.setCurrentPage(0);
}
@Override
protected void onAjaxClick(AjaxRequestTarget target) {
target.addComponent(webMC);
}
});
webMC.add(new AjaxFallbackOrderByBorder("orderByName", "name", personDataProvider)
{
@Override
protected void onSortChanged()
{
dv.setCurrentPage(0);
}
@Override
protected void onAjaxClick(AjaxRequestTarget target) {
target.addComponent(webMC);
}
});
webMC.add(new AjaxFallbackOrderByBorder("orderByAge", "age", personDataProvider)
{
@Override
protected void onSortChanged()
{
dv.setCurrentPage(0);
}
@Override
protected void onAjaxClick(AjaxRequestTarget target) {
target.addComponent(webMC);
}
});
webMC.add(dv);
webMC.add(new AjaxPagingNavigator("navigator",dv));
// group.add(webMC);
AjaxButton ab = new AjaxButton("ajax-button", new PropertyModel<String>(this,
"counter"), form) {
@Override
protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
counter++;
logger.info("ajx form recived");
logger.info("ajx person name " + person.getName());
target.addComponent(this);
}
};
form.add(webMC);
form.add(ab);
form.setDefaultButton(ab);
add(form);
}
}