Managing style options of background , foreground , font of Treeview

Assigning default style for Treeview

This is applied to all Treeview widgets.

style = ttk.Style(my_w) 
style.theme_use("clam") # set theam to clam
style.configure("Treeview", background="black", 
                fieldbackground="black", foreground="white")
style.configure('Treeview.Heading', background="PowderBlue")

The last line in above code adds different background color to headings.

row height by using style.

style.configure('Treeview', rowheight=100)

Managing style using Radio buttons

Using three RadioButtons we will configure the style of Treeview. We used on StringVar() with default value as 'black'. On click of the radio button we will trigger the function my_upd(col) and we passed colour as parameter.

r1 = tk.Radiobutton(my_w, text='Black', variable=r1_v, value='black',
	command=lambda:my_upd('black'))

Inside the function my_upd() we will check the parameter value and accordingly update the style.

def my_upd(col):
    if col=='white':
        style.configure('Treeview',background="white", 
                fieldbackground="white", foreground="black")
    elif col=='yellow':
        style.configure('Treeview',background="yellow", 
                fieldbackground="yellow", foreground="black")
    else:
        style.configure('Treeview',background="black", 
                fieldbackground="black", foreground="white")

We can include the font style also.

font1=['Times',12,'normal']

To one of the option we can assign the font style like this.

    elif col=='yellow':
        style.configure('Treeview',background="yellow", 
                fieldbackground="yellow", foreground="black",font=font1)

Configuring Tkinter Treeview style background foreground color using Radio buttons

from tkinter import ttk
import tkinter as tk
# Creating tkinter my_w
my_w = tk.Tk()
my_w.geometry("300x250") # width and height of the window 
my_w.title("www.plus2net.com")  

trv=ttk.Treeview(my_w,selectmode='browse',show='headings',height=5)
trv.grid(row=1,column=1,columnspan=3,padx=30,pady=10)
# column identifiers 
trv["columns"] = ("1", "2")
# Defining headings, other option is tree
trv['show'] = 'headings tree' 
# width of columns and alignment 
trv.column("#0", width = 80, anchor ='c')
trv.column("1", width = 10, anchor ='c')
trv.column("2", width = 100, anchor ='c')
# Headings  
# respective columns
trv.heading("#0", text ="Label",anchor='c')
trv.heading("1", text ="id")
trv.heading("2", text ="Name",anchor='c')

trv.insert("",'end',iid=1,text='First',values=(1,'n1-Alex'))
trv.insert("",'end',iid=2,text='second',values=(2,'n2-Ravi'))
trv.insert("",'end',iid=3,text='third',values=(3,'n3-Ronn'))

style = ttk.Style(my_w) 
style.theme_use("clam") # set theam to clam
style.configure("Treeview", background="black", 
                fieldbackground="black", foreground="white")
style.configure('Treeview.Heading', background="PowderBlue")

r1_v = tk.StringVar(value='black')  # We used string variable here

def my_upd(col):
    if col=='white':
        style.configure('Treeview',background="white", 
                fieldbackground="white", foreground="black")
    elif col=='yellow':
        style.configure('Treeview',background="yellow", 
                fieldbackground="yellow", foreground="black")
    else:
        style.configure('Treeview',background="black", 
                fieldbackground="black", foreground="white")

r1 = tk.Radiobutton(my_w, text='Black', variable=r1_v, value='black',
	command=lambda:my_upd('black'))
r1.grid(row=2,column=1) 

r2 = tk.Radiobutton(my_w, text='White', variable=r1_v, value='white',
	command=lambda:my_upd('white'))
r2.grid(row=2,column=2) 

r3 = tk.Radiobutton(my_w, text='Yellow', variable=r1_v, value='yellow',
	command=lambda:my_upd('yellow'))
r3.grid(row=2,column=3) 
my_w.mainloop()

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Managing Style of Treeview

Assigning default style for Treeview

Managing style using Radio buttons

Subhendu Mohapatra