behaviour of window.present() on different WM

Hi list,

I'm  trying to popup a window_toplevel (win2) when a key is pressed in a first 
window_toplevel (win) but I also want to keep the first one (win) the active 
window with the focus on the textview inside (win), at the end the second 
(win2) have to stay on top anyway...
To achieve this goal I'm using window.present() on (win) after the second is 
popped-up (win2) then textview.grab_focus and window.set_keep_above(gtk.TRUE) 
on the second window (win2)....

Because probably my english sucks...let's post some code:

This is the first version, it works perfectly on the following DE or WM:
kde, openbox, waimea, fvwm2, xfce4 and also Microsoft Windows.
When a key is pressed on win1, win2 is shown, win1 gets active and the focus 
is into the textview. 

but it does not work on:
gnome (metacity) and fluxbox.

import pygtk
pygtk.require('2.0')
import gtk
 
class SecondWin:
    def __init__(self):
        self.win = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.win.connect("delete_event", self.delete_event)
        self.win.connect("destroy", self.destroy)
        self.win.connect("key-press-event", self.newTree)
        self.win.set_default_size(500, 500)        
        self.text = gtk.TextView()
        self.win.add(self.text)
        self.win.show_all()
 
    def newTree(self, widget, event):
        self.win2 = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.win2.set_default_size(300, 300)        
        self.tree = gtk.TreeView()
        self.win2.add(self.tree)
        self.win2.show_all()
        self.win.grab_focus()
        self.win.present()
        self.win2.set_keep_above(gtk.TRUE)
 
    def delete_event(self, widget, event, data=None):
        return gtk.FALSE
 
    def destroy(self, widget, data=None):
        return gtk.main_quit()
 
    def main(self):
        gtk.main()
 
if __name__ == "__main__":
    second = SecondWin()
    second.main()

After I spoke with xordoquy (thanks again) in IRC he proposed this:

    def newTree(self, widget, event):
        self.win2 = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.win2.set_default_size(300, 300)        
        self.tree = gtk.TreeView()
        self.win2.add(self.tree)
        self.win2.show_all()
        gtk.idle_add(self.delay)

    def delay(self):
        self.win.present()
        self.win.grab_focus()
        self.win2.set_keep_above(gtk.TRUE)

It does work only once (the first time you press a button but then not 
anymore) on gnome (metacity), with fluxbox it doesn't work at all.

Sorry for the long post but I would like to understand why this happen and 
maybe what I can do to have my code running as I would like on all the DE / 
WM.

Thanks a lot to everybody for the patience.
Have a nice day, evening or whatever in the world now :)

GMario
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