Piratz Sizegrip

We will be building a standalone python script based on the individual widget scripts generated here and for the rest of this chapter. Since Sizegrip has no other states than its normal we need only to think of a suitable image, then use this to change its component - sizegrip - by means of element create within the command theme_create.

Note

Images are found in piratz, the subdirectory of images, and all are png files, as later on it will make things easier.

The important lines are the following:

'sizegrip': {"element create":
     ('image', "sizegrip")}

which you will find sandwiched between the comment lines:

# start of theme extract

# end of theme extract - don't forget to add comma at end when inserting

'sizegrip' is the element with which we are working, this being unique requires no identifiying widget name. "sizegrip" is the image alias name, based on the image name itself sizegrip.png, so take the image name less the image suffix. These two lines are what we shall be inserting into the Piratz standalone theme together with an end comma to allow further clauses to be inserted.

Unless we add columnconfigure and rowconfigure to the test script sizegrip positions itself in the upper left corner, instead of the lower right corner.

'''
Create theme extract for custom widgets.
'''

from tkinter import Tk, PhotoImage, font
from tkinter.ttk import Style, Frame, Sizegrip 

root = Tk()
test_size = font.Font(family="Times", size=12, weight="bold").measure('Test')
mult = int(test_size / 30)
fr = Frame(root, height=50*mult)
fr.grid(column=0,row=0,sticky='nsew')

img1 = PhotoImage("sizegrip", file='../images/piratz/sizegrip.png')

style = Style()
# both theme_create and theme_settings worked
style.theme_create( "yummy", parent="clam", settings={
#style.theme_settings('default', {
# start of theme extract
     'sizegrip': {"element create":
          ('image', "sizegrip")}
# end of theme extract - don't forget to add comma at end when inserting
     })

style.theme_use('yummy') # 'default'
root.columnconfigure(0, weight = 1)
root.rowconfigure(0, weight = 1)
widg = Sizegrip(root)
widg.grid(row=1,column=1,sticky='se')

root.mainloop()

theme_create requires a new theme name, "yummy", and a ttk standard theme name (alt, clam, classic or default) as the parent, later on use the new theme name.:

16 style.theme_create( "yummy", parent="clam", settings={
.....
24 style.theme_use('yummy')
.....

theme_settings requires a ttk standard theme name and the same in theme_use.:

17 style.theme_settings('default', {
.....
24 style.theme_use('default')
.....