For time being I am able to sort it out in another way. Added mouse over event in the
frame and onmouseover I am deleting menu and adding again. After compilation of GWT
source code it will generates javascript file and this addition and deletion will
happen using DHTML (I think). User can't see this addition and deletion

Frame frame = new Frame(getUrl()) {
  public void onBrowserEvent(Event event) {
    super.onBrowserEvent(event);
    RootPanel.get("MainMenu").remove(menuGrid);
    RootPanel.get("MainMenu").add(menuGrid);
  }
};
frame.sinkEvents(Event.ONMOUSEOVER);

dipakpaul -- two requests:

1. Please provide a code sample demonstrating the problem if possible.

2. When you say "click outside of the menu" which frame are you referring to?  i.e.
are you clicking in the PDF frame, or are you clicking in the frame containing your
menu?  Does the menu not close at all, or does it not close only when you click on
the PDF frame?

Page layout is
---------------------------
GWT Menus
---------------------------
GWT frame (with PDF document)
---------------------------

Problem code was:
Frame frame = new Frame(getUrl());
frame.setWidth("100%");
frame.setHeight("100%");
RootPanel.get("MainMenu").add(menuGrid);
RootPanel.get("Frame").add(frame);


Fixed Code is:
Frame frame = new Frame(getUrl()) {
  public void onBrowserEvent(Event event) {
    super.onBrowserEvent(event);
    RootPanel.get("MainMenu").remove(menuGrid);
    RootPanel.get("MainMenu").add(menuGrid);
  }
};
frame.sinkEvents(Event.ONMOUSEOVER);
frame.setWidth("100%");
frame.setHeight("100%");
RootPanel.get("MainMenu").add(menuGrid);
RootPanel.get("Frame").add(frame);

If any other thing require please shoot comments

Clicked on any menu it is opening submenu drop down. After that I went to iframe and
doing some operations, but submenu items still showing, this is the problem. Menu
does not close only when we clicked on iframe.

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Removing the 1.4 RC label from issues we know won't be able to make it into
1.4 RC. If they end up being super-critical, we can possibly pull them in
before 1.4 Final (but that should be only a last resort).

I have the same issue:
I have a menu on top of a Frame object.
When the user opens the menu, the menu does not close when the user clicks on the 
Frame object. Only if you click somewhere else the menu will disappear.
See attachment for example.
I guess that the problem is because no events are handled on this Frame so the 
EventPreview mechanism does not detect the click.

FrameMenuTest.zip 3.3 KB   Download

I'm marking this for 1.5 because I really want to try and fix it; Be warned, however,
that this may be impossible in the general case.

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I have the same problem with a SuggestBox's popup and iframes. The popup just doesn't
close on clicking on the iframe. While debugging I found out that onEventPreview
isn't fired when I click on the iframe and that's why the popup (which by the way is
configured autoClose=true) doesn't close.

The MenuBar uses the same mechanism for submenus like the SuggestBox for its menu. So
it is the same issue.

Found in GWT 1.5.0

I just created a workaround for the SuggestBox issue. Take a look at my blog:
http://my.epos4.at/fota/blog/blogid/245_Workaround_for_GWT_Issue_729_in_SuggestBox

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switching as it looks like an onEventPreview bug actually...

I believe the problem is that the events that occur in the iframe do not propagate up
to the window, so the menu never sees them.  We would need a glass panel to cover the
iframes to fix this.

Looking at Closure's code, I stumbled on this code, which handles "cross-iframe dismissal" of popups, without the 
need for a glass panel:
http://closure-library.googlecode.com/svn/trunk/closure/goog/docs/closure_goog_ui_popupbase.js.source.html#line440