Python DeskTop Application Development with XML layout file

by nobuyuki inoue

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This book introduce you a library for tkinter building layout with XML file. 　 　 　 # Creat instance of Gui ( Gui is a Class we introduce ).
# Parameter is a object to get 'Callback Notification'.
# Give anything you like.
gui = Gui ( self )

# Creat tkinter.Tk instance
tk_root = tk.Tk()

# Let's call 'build' function to build layout.
# params : parent widget and layout file path.
# return : dict ( instance_tree . show you how to use later )
instance_tree = gui.build ( tk_root , 'layout.xml' )

# display tkinter.Tk
tk_root.mainloop ()
That's all . Speedy , Easy , Simple . 　 # We can get 'Widget Instances' from XML file with 'Path' like 'frame/button'
# instance_tree is a dict like ...
# ｛ path1 : list1 , path2 : list2 , ... ｝
list_of_buttons = instance_tree [ 'frame/button' ]


# To get Button instance from list of Buttons
button1 = list_of_buttons [ 0 ]
button2 = list_of_buttons [ 1 ] 　 Example of XML file . ( To avoid unintentional characters , I use two-byte characters below ...) ＜!-- Example of Style Settings --＞
＜ style name = "N.TLabel" background = "blue" font = "Arial,20" /＞
＜ style name = "N.TButton" font = "serif,20" /＞
・・・
＜!-- Example of Label Widget --＞
＜ label text = "N Python Gui Library" style="N.TLabel"＞
＜ /label ＞
・・・
＜!-- Example of Button Widget --＞
＜ button text = "click me" style="N.TButton"＞
　　＜ command name = "onclicked" /＞
＜ /button ＞ [Point 1]
We can define style with style tag .

[Point 2]
We can set style to widgets with writing tag name of style to style attribute of widget.

[Point 3]
We can bind 'Command' with 'Button' using 'command' tag. 　

104 pages, Kindle Edition

Published January 6, 2023