Morton Goldberg
8/19/2006 8:58:00 PM
Now that I've looked a little deeper into the problem, I see that
Tk.root.withdraw wouldn't be useful, because in your case, if you use
it, you won't see the root window's menu bar. What to do? Well, you
might try something like the following:
<code>
root = TkRoot.new {title 'Ruby Tk'}
mnu_bar = TkMenu.new()
windo_mnu = TkMenu.new(mnu_bar)
windo_mnu.add_command(
'label'=>"Show",
'command'=>lambda {windo_mnu.show}
)
windo_mnu.add_command(
'label'=>"Hide",
'state'=>'disabled',
'command'=>lambda {windo_mnu.hide}
)
def windo_mnu.show
entryconfigure(0, 'state'=>'disabled') # disable show
entryconfigure(1, 'state'=>'normal') # enable hide
Tk.root.geometry($visible)
end
def windo_mnu.hide
entryconfigure(1, 'state'=>'disabled') # disable hide
entryconfigure(0, 'state'=>'normal') # enable show
Tk.root.geometry("0x0+0+0")
end
mnu_bar.add_cascade('label'=>"Window", 'menu'=>windo_mnu)
root.menu(mnu_bar)
min_w, min_h = 200, 100
root.minsize(min_w, min_h)
root_x = (root.winfo_screenwidth - min_w) / 2
$visible = "#{min_w}x#{min_h}+#{root_x}+50"
root.geometry("0x0+0+0")
root.bind('Command-q') {exit}
Tk.mainloop
</code>
This is my best shot at the moment. It's not very elegant since you
can still see the vestigial root window in the upper left-hand corner
of the screen if you look hard, but perhaps it's good enough to fool
your users :)
Regards, Morton
On Aug 19, 2006, at 3:23 PM, Morton Goldberg wrote:
> Yes, you can make the root window invisible. The following produces
> a default menu bar but no (visible) root window on my Mac:
>
> require 'tk'
>
> root = TkRoot.new
> root.withdraw
> Tk.mainloop