# -*- coding: utf-8 -*-
import tkinter as tk
import tkinter.ttk as ttk
root = tk.Tk()
root.title("tk33.py")
root.geometry("400x325")

#####################################
ttk.Style().configure('Treeview', 
         background = 'lightgreen', foreground = 'black')
tv = ttk.Treeview(root,show = 'tree', padding = 20)
tv["columns"] = ('item','demand')
tv.column('item', width = 50)
tv.column('demand', width = 50)
tv.heading('item', text = '品項')
tv.heading('demand', text = '需求')

tv.insert("", 0, 'classA', text = 'A班', values = ('電腦','1'), tag = 'A')

cb = tv.insert('', 'end', 'classB', text = 'B班', tag = 'B')
cb1 = tv.insert(cb, 'end', 'bitem1',text ='第一組', tag = 'B1')
tv.insert(cb1, 'end', text = '大雄', value = ('筆芯',5), tag = 'B11')
tv.insert(cb1, 'end', text = '靜香', value = ('紙張',9), tag = 'B12')
cb2 = tv.insert(cb, 'end', 'bitem2',text = '第二組',
                values = ('原子筆', '20'), tag = 'B2')

tv.insert('', 'end', 'classC', text = 'C班', tag = 'C')
tv.insert('classC', 0, text = '第一組', values = ('鉛筆','10'), tag = 'C1')
tv.pack()

tv.tag_configure('A', background = 'pink', foreground = 'blue', 
                 font = "標楷體 14 bold")

def show(event):
    lb.config(text = "A is selected.")
tv.tag_bind('A', "<1>", show)
lb = tk.Label(root, text = 'label')
lb.pack()

#####################################
root.mainloop()