>
> ParentComponent class has
> @UiChild(tagname="ChildComponent")
> public void add(ChildComponent c) {}
>
> If the UiBinder has
> <g:HTMLPanel>
> <aj:ChildComponent ui:field="child1"></aj:ChildComponent>
>
> Then it works
>
> But if I have
> <g:HTMLPanel>
> <aj:ParentComponent ui:field="parent1">
> <aj:ChildComponent ui:field="child1"></aj:ChildComponent>
> </aj:ParentComponent>
>
> Then I get a compoile error MyTest.ui.xml has no ui:field attribute for
> <package>.MyTest#child1
>
> Any ideas? I'm stumped.
>
In your example you have named your custom @UiChild tag the same as one of
your components (ChildComponent). Now things might be ambiguous as
<aj:ParentComponent ui:field="parent1">
<aj:ChildComponent></aj:ChildComponent>
</aj:ParentComponent>
can now mean "call method annotated with @UiChild(tagname=ChildComponent)"
or "add ChildComponent to ParentComponent". Looks like GWT gives @UiChild
higher priority and thats why you get an error if you try to assign a
ui:field to it. GWT thinks you are trying to assign ui:field to a @UiChild
method call which does not work.
When you use @UiChild then your UiBinder file look like:
<my:CustomComponent>
<my:leftaligned> <!-- all lower case, so it never clashes with possible
class names of other widgets -->
<g:FlowPanel ui:field="child1" />
</my:leftaligned>
</my:CustomComponent>
class CustomComponent {
@UiChild // by default GWT strips off the "add" prefix and uses
lowercase(LeftAligned) as tag name
void addLeftAligned(Widget w) {
HasWidgets leftWidgets = getLeftContainer();
leftWidgets.add(w);
}
}
-- J.
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