Volker Weber wrote:
> My current problems are related to container components. When I remove
> container components odd things happen. Removing component a results
> in the entire component subtree not being rendered.
? Maybe i don't understand you correct, if you remove the parent why
did you expect the children are rendered?
> If I remove
> container b I fail to get any response for the HTTP request,
> and if I
> remove both I get an error about MyFaces not being able to add a child
> node (see below).
What did you mean with remove both ? When you removing a the entire
subtree is removed.
Plese post the code for adding an removing. did you already assign
uniqe ids to all created components, the exception says someting about
dublicate ids. Also add ids to all tags to identifiy the problematic
components.
I'm assigning IDs explicitly. While going through the code a minute
ago I found a flaw that was causing one problem (in one particular
case a container component was added as its own child).
What I meant by "removing a container component", was that I modified
the code to omit a container from the hierarchy and adding its
children directly as children of the omitted component's parent.
Currently, if I remove the h:panelGrid element from the view, my
custom component tree is not rendered at all. I'll probably want to
include my component tree in a some container component such as
h:panelGrid but I'd just like to know why this happens.
I've done some changes to the code posted earlier, here's the code in
a somewhat simplified form. Are there any potential problems with the
way the component hierarchy is built?
<h:form>
<h:panelGrid>
<my:inputSelectSet value="#{myBean.items}"/>
</h:panelGrid>
</h:form>
public class MyInputSelectSet extends UIInput {
public MyInputSelectSet() {
super();
setRendererType(null);
}
public void encodeBegin(FacesContext ctx) throws IOException {
if(this.getChildren().isEmpty())
initializeComponent();
}
private void initializeComponent() {
for(int i = 0; i<5; i++)
addSelectInputParameter(this, app);
}
private void addSelectInputParameter(UIComponent container,
Application app) {
MyInputSelect sip =
(MyInputSelect)app.createComponent(MyInputSelect.COMPONENT_TYPE);
sip.setId(getId());
sip.initializeComponent();
HtmlOutputLabel l =
(HtmlOutputLabel)app.createComponent(HtmlOutputLabel.COMPONENT_TYPE);
l.setId(getId());
HtmlPanelGroup group =
(HtmlPanelGroup)app.createComponent(HtmlPanelGroup.COMPONENT_TYPE);
group.setId(getId());
group.getChildren().add(l);
group.getChildren().add(sip);
container.getChildren().add(group);
}
public String getFamily() { return COMPONENT_FAMILY; }
private String getId() { return
FacesContext.getCurrentInstance().getViewRoot().createUniqueId(); }
}
public class MyInputSelect extends UIInput {
public MyInputSelect() {
super();
setRendererType(null);
}
public void initializeComponent() {
Application app = FacesContext.getCurrentInstance().getApplication();
UIInput input = (UIInput)app.createComponent(UIInput.COMPONENT_TYPE);
input.setId(getId());
this.getChildren().add(input);
HtmlSelectManyListbox menu =
(HtmlSelectManyListbox)app.createComponent(HtmlSelectManyListbox.COMPONENT_TYPE);
menu.setId(getId());
List<SelectItem> items = new ArrayList<SelectItem>();
for(int i = 0; i < 5; i++)
items.add(new SelectItem(new String(i), new String(i));
UISelectItems selectItems = new UISelectItems();
selectItems.setId(getId());
selectItems.setValue(items);
menu.getChildren().add(selectItems);
this.getChildren().add(menu);
}
public void decode(FacesContext ctx) {
// read child component values and set components value accordingly
}
public String getFamily() { return COMPONENT_FAMILY; }
private String getId() { return
FacesContext.getCurrentInstance().getViewRoot().createUniqueId(); }
}
