On Jul 21, 8:32 pm, Thad <[email protected]> wrote:
> I'm testing moving my application from a RootPanel to
> RootLayoutPanel.  Given my layout, it's not a 1-to-1 swap, and the end
> result is some focusing problems with my logon from.
>
> My HTML page contains an <iframe> for GWT history, an <iframe> that
> serves as target for downloading files (so I don't have to open a
> browser window), a <form> for logging on, and a <div> for my
> application that RootPanel.get(String) retrieves.  The logon form's
> action is attached via JSNI.  The HTML page carries and onload()
> script that focuses the cursor in the username field.  After logon,
> the form is hidden and the application <div> shows.  On logout, I hide
> and clear the main panel and show the logon form.  This works fine in
> all browsers.
>
> However RootLayoutPanel has no get(String) method.  So I call
> get().add(new ScrollPanel(myAppPanel)), bypassing the old <div>.  This
> *seems* to work well, but if the user clicks *anywhere* on the page,
> the form loses focus.  The focus cannot be regained unless the user
> tabs through the browser window waiting for the username to highlight.
>
> Looking in Firebug, I think the problem is a <div> of GWT's making:
> <div style="position: absolute; z-index: -32767; left: -20cm; top:
> -20cm; width: 10cm; height: 10cm;">&nbsp;</div>
>
> Is that's what's doing it?  What is this <div> for?  How can I get
> around this focus problem, or do I need to stick with RootPanel?

The div is probably the RootLayoutPanel itself. Can't you show/hide
the RootLayoutPanel to show/hide the app and hide/reveal the login
form? Another idea: use position absolute (or relative) and a high z-
index on your login form to make it appear in front of the
RootLayoutPanel.

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