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

I found that the Tkinter Font object has a metrics() method, that gives its height as "linespace". That allows the row height to be scaled dynamically:

try:
    from tkinter.font import Font
    from tkinter.ttk import Style, Treeview
    from tkinter import *         
except:
    from tkFont import Font
    font ttk import Style, Treeview
    from Tkinter import *

font=Font(family='Arial', size=20)
font.metrics()
#output: {'ascent': 31, 'descent': 7, 'linespace': 38, 'fixed': 0}

With that, you can get the font height with:

font.metrics()['linespace']
#output: 38

Then use it to set the rowheight in your Treeview widget:

fontheight=font.metrics()['linespace']

style=Style()
style.configure('Calendar.Treeview', font=font, rowheight=fontheight)   

tree=Treeview(style='Calendar.Treeview')

Changing the font object parameters comfortably updates the Treeview widget, but the rowheight doesn't get updated, and needs to be redone. So for example, scaling the font size with a keyboard shortcut may look like this:

def scaleup():
    font['size']+=1
    style.configure('Calendar.Treeview', rowheight=font.metrics()['linespace'])

def scaledown():
    font['size']-=1
    style.configure('Calendar.Treeview', rowheight=font.metrics()['linespace'])

tree.bind('', scaleup)
tree.bind('', scaledown)

I actually wanted to do the same with Control-MouseWheel, but didn't figure out the behavior yet (Would be glad to hear how that works).

Hope this comes handy.