''[MGS]'' [[2003/09/20] - Sometimes it is necessary/desirable to bind to a toplevel window. For example, I might want to withdraw a toplevel window, instead of having it iconify, when clicking the minimize button. There are several ways to do this:

'''1.''' Bind directly to the window name. e.g.

   bind . <Unmap> [list wm withdraw .]

However, the binding will trigger if you decide to unmanage any of the window's child widgets, due to their default binding tags.

'''2.''' Bind to the toplevel window's class. e.g.

   bind [winfo class .] <Unmap> [list wm withdraw %W]
However, this binding will fire for all windows with the same class as '''.''' .

'''3.''' Create a new binding tag for the toplevel window and then create the binding to that tag. e.g.

  bindtags . [list . bind. [winfo class .] all]
  bind bind. <Unmap> [list wm withdraw %W]

or more generally:

  set W [toplevel .mywin]
  bindtags $W [linsert [bindtags $W] 1 bind$W]
  bind bind$W <Unmap> [list wm withdraw %W]

----
[RUJ]: Hi, I would like to know ... How to bind a "Leave" command to main toplevel but it should be work on its child widgets also.
I want to make popupwindow which will have some entries and labels & this window should destroyed after cursor moved away from window.
----
See also:

   * [bind]
   * [bindtags]
   * [toplevel]