ttk.Treeview - Can't change row height

Question

I\'m using ttkcalendar.py which can be found in this link.

I\'ve adapted it for use in Python 3.3

Basically what i\'m trying to do

Answer 1

Perhaps like you, I expected lines to expand as necessary. But I confirmed the problem with the code below, with the solution (the two style lines) omitted. When I could not find the solution here and the corresponding Style page, I googled and found this. Scroll down to Emiliano's answer, and some of the following (there is also an indent option).

import tkinter as tk
from tkinter import ttk

root = tk.Tk()
root.geometry('500x200')
style = ttk.Style(root)
style.configure('Treeview', rowheight=40)  #SOLUTION
tree = ttk.Treeview(root)
tree.insert('', 0, text='Line 1 of many XXX', tags='T')
tree.insert('', 1, text='Line 2 of many XXX', tags='T')
tree.insert('', 2, text='Line 3 of many XXX', tags='T')
tree.column('#0', stretch=True)
tree.tag_configure('T', font='Arial 20')
tree.pack(fill='x')

The above, with the answer omitted, is an example of minimal code that exhibits the problem. This is the sort of thing to post!

EDIT 1:

To make the Calendar widget properly importable and usable in another application, it should use a custom style, so its style does not affect any other treeviews in the app.

style.configure('Calendar.Treeview', rowheight=40)
tree = ttk.Treeview(root, style='Calendar.Treeview')

EDIT 2:

I am just learning about ttk styles myself. To answer your relief question, I went to this style doc and tried the following in Idle's Shell after running the above, with the two modifications in Edit 1.

>>> style.layout('Calendar.Treeview')
[('Treeview.field', {'sticky': 'nswe', 'children': [('Treeview.padding',
{'sticky': 'nswe', 'children': [('Treeview.treearea', {'sticky': 'nswe'})]})], 'border': '1'})]
>>> style.element_options('Calendar.Treeview.border')
('-relief',)
>>> style.lookup('Calendar.Treeview.border', 'relief')
''
>>> style.configure('Calendar.Treeview.border', relief='raised')
{}

I do not see any border nor did not see any effect of the setting. Perhaps relief applies to borders between columns. I don't know. (Note that changing rowheight is immediately available, so configuration is 'live'.)