Window not in focus until clicked

[Rob Clack <rnc sanger ac uk>]

Gtk 1.2.10, Red Hat Linux, Gnome Panel 1.4.0.4

I have a window which is called either from a toolbar button or from a 
popup menu invoked by a right mouse-button click.

When called via the toolbar it works OK, but when called via the popup 
menu, though it looks as though it has focus, nothing, apart from the 
dismiss button, top right, responds to the first click of the mouse. 
Once you've done that, everything responds correctly.

The dismiss box, though it moves as though clicked, never responds 
before you've clicked once on one of the window widgets.

So if I click twice on one of the various buttons, on the second click 
the button moves and the callback function is activated.  If, on first 
displaying the window, I click the dismiss button, it moves, but does 
nothing, and I can click it as many times as I like. Once I've clicked 
on one of the other buttons, the dismiss button works as normal.

But, if I right-click within my window I get the same popup menu as 
before, which is why I think I've got a focus problem.  The popup menu 
belongs to the parent window, so shouldn't appear.

The popup menu is created using item_factory.

I've tried adding gtk_window_set_focus() and gtk_widget_grab_focus() to 
no avail. GTK_WIDGET_IS_SENSITIVE tells me the window is sensitive.

A clue as to how to proceed would be much appreciated.
Rob Clack
--
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 If you're too open-minded, your brains will fall out.
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 Rob Clack                        Acedb Development,  Informatics Group
 email: rnc sanger ac uk                Wellcome Trust Sanger Institute
 Tel: +44 1223 494780                   Wellcome Trust Genome Campus
 Fax: +44 1223 494919                   Hinxton  Cambridge    CB10 1SA