On Dec 29, 5:06 am, jd <[email protected]> wrote:
> Hi,
>
> I have a page that contains a header div containing some anchors
> defined in the html page. My GWT code finds the header with
> RootPanel.get(String) and adds it to a DockLayoutPanel. I have tried
> to attach click handlers to the links in the header like this:
>
> header = RootPanel.get("header");
> NodeList<com.google.gwt.dom.client.Element> aes =
> header.getElement
> ().getElementsByTagName("a");
> com.google.gwt.dom.client.Element item = aes.getItem(0);
> Anchor anchor = Anchor.wrap(item);
> anchor.addClickHandler(new ClickHandler()
> {
> public void onClick(ClickEvent event)
> {
> Window.alert("hi");
> }
> });
>
> but get this exception
>
> java.lang.AssertionError: A widget that has an existing parent widget
> may not be added to the detach list
> at com.google.gwt.user.client.ui.RootPanel.detachOnWindowClose
> (RootPanel.java:136)
> at com.google.gwt.user.client.ui.Anchor.wrap(Anchor.java:59)
>
> Can anyone suggest how I should be approaching this situation?
Use Document.get().getElementById("header") instead of RootPanel.get
("header").getElement() to avoid the RootPanel widget being created,
which then prevents wrap()ing an inner element in another widget.
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