On 3/30/2009 3:37 AM Eric Brunel apparently wrote:
The object traditionally called root is in fact an instance of the tcl interpreter that will get the commands generated by the Tkinter module. Due to tk architecture, creating this interpreter will also create a window, which is inteneded to be your application's main window. This window is called '.' in tcl/tk. The root object in Tkinter then represents this '.' window. So the instance of Tk is actually 2 things: - The interpreter itself; - The main window for your application.
OK.
As for when you should create explicitely an instance of Tk, well, I'd say always ;-) Creating an instance of Frame without creating a Tk instance first will actually create one, but you'll have no direct access to it.
If I start by creating a frame `f`, then ``f.master`` is the root. Still, I take your point.
And you might want an access to it for quite a number of reasons: hiding it, make it an icon, add menus to it, and so on... All these operations can be done on actual windows, not on a Frame which is just a container widget.
Useful. Thanks.
All Tkinter widget actually reference their interpreter in their tk attribute. The StringVar will probably just use that.
Yes, I see how this works now.
The Tk instance is registered in a hidden variable in the Tkinter module. When you don't specify a master, it'll use the latest created Tk instance one by default. BTW, the latest should be the only one: it is quite unsafe to create several Tk instances in the same application.
I have no desire to do this, but might you pin down "unsafe"?
I guess that having a window automatically created when you just try to instantiate a variable has been considered weird. But it's just a guess.
Yes, I am making that same guess. Thanks! Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
