Custom tags in UiBinder files

Question

When using a <g:LayoutPanel> in UiBinder.ui.xml files, you can specify <g:layer> tags. Some other Google-built widgets have special tags like that as well - <g:tab> even has a sub-tag, <g:header>.

How can I specify these for my own widgets?

Quartering

The question is still interesting two years later: do you know about any improvements? – Geo

Yes, there are definite improvements: look up @UiChild – Quartering

In fact, check out https://mcmap.net/q/1315996/-gwt-uibinder-how-to-make-a-custom-absolutepanel-which-uses-the-quot-at-quot-element – Quartering

Answer 1

The new answer to this question, after some GWT improvements, is at https://mcmap.net/q/1315996/-gwt-uibinder-how-to-make-a-custom-absolutepanel-which-uses-the-quot-at-quot-element . Copied below to avoid moderator deletion (maybe?).

You can use @UiChild to declare special functions in your widgets accessible in UiBinders.

for example,

class MyPanel extends AbsolutePanel {

    @UiChild
    public void addAt(Widget w, String parameter1, String parameter2) {
         ....

Then, in your uiBinder, you can say

<custom:MyPanel>
    <custom:at parameter1="HI" parameter2="Anything you like!">
        <g:AnySingleWidget />
    </custom:at>
</custom:MyPanel>

See @UiChild at http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/uibinder/client/UiChild.html

Quartering

Answer 2

What you're looking for is a custom element parser for UiBinder. See this issue. Unfortunately it's not supported yet.

You might be interested in this post for some guidance on how to extend the current parser on your own.

Herriott