=======================
Python GUI with Tkinter
=======================

Installing Tkinter
==================

.. code-block:: none

    fabgt@fabgt-SAT:~$ sudo apt-get install python3-tk

Hello World!
============

.. Tip::

    https://www.youtube.com/watch?v=YXPyB4XeYLA


.. code-block:: Python

    #!/usr/bin/env python3

    from tkinter import *

    root = Tk()

    #Creating a label widget
    my_label = Label(root, text="Hello World!")
    #Shoving it onto the screen
    my_label.pack()

    root.mainloop()

Positioning with the Grid System
================================

.. code-block:: Python

    #!/usr/bin/env python3

    from tkinter import *

    root = Tk()

    #Creating a label widget
    myLabel1 = Label(root, text="Hello World!")
    myLabel2 = Label(root, text="My name is Fabien")
    #Shoving it onto the screen
    myLabel1.grid(row=0, column=0)
    myLabel2.grid(row=1, column=1)

    root.mainloop()

Result:

.. image:: ../attachments/TkinterGrid.png
  :width: 200
  :alt: Grid Positioning System


Widgets
=======


Bind Multiple Commands to Tkinter Button
----------------------------------------

Multiple commands could be executed after the button is clicked.

The Tkinter button has only one command property so that multiple commands or functions should be wrapped to one function that is bound to this command.

We could use lambda to combine multiple commands as,

.. code-block:: Python

    command=lambda:[funcA(), funcB(), funcC()]