FAQ Graficzny Interfejs Użytkownika
***********************************


Pytania ogólne o GUI
====================


Jakie zestawy narzędzi GUI istnieją dla Pythona?
================================================

Standardowe kompilacje Pythona zawierają obiektowy interfejs do
zestawu widżetów Tcl/Tk, zwany tkinter.  Jest to prawdopodobnie
najłatwiejszy do zainstalowania (ponieważ jest dołączony do większości
binarnych dystrybucji Pythona) i używania. Więcej informacji o Tk, w
tym wskazówki do źródeł, można znaleźć na stronie domowej Tcl/Tk.
Tcl/Tk jest w pełni przenośny na platformy macOS, Windows i Unix.

Depending on what platform(s) you are aiming at, there are also
several alternatives. A list of cross-platform and platform-specific
GUI frameworks can be found on the python wiki.


Pytania dotyczące Tkinter
=========================


How do I freeze Tkinter applications?
-------------------------------------

Freeze is a tool to create stand-alone applications.  When freezing
Tkinter applications, the applications will not be truly stand-alone,
as the application will still need the Tcl and Tk libraries.

One solution is to ship the application with the Tcl and Tk libraries,
and point to them at run-time using the "TCL_LIBRARY" and "TK_LIBRARY"
environment variables.

Various third-party freeze libraries such as py2exe and cx_Freeze have
handling for Tkinter applications built-in.


Can I have Tk events handled while waiting for I/O?
---------------------------------------------------

On platforms other than Windows, yes, and you don't even need threads!
But you'll have to restructure your I/O code a bit.  Tk has the
equivalent of Xt's "XtAddInput()" call, which allows you to register a
callback function which will be called from the Tk mainloop when I/O
is possible on a file descriptor.  See File Handlers.


I can't get key bindings to work in Tkinter: why?
-------------------------------------------------

An often-heard complaint is that event handlers bound to events with
the "bind()" method don't get handled even when the appropriate key is
pressed.

The most common cause is that the widget to which the binding applies
doesn't have "keyboard focus".  Check out the Tk documentation for the
focus command. Usually a widget is given the keyboard focus by
clicking in it (but not for labels; see the takefocus option).
