# -*- coding: utf-8 -*-
import tkinter as tk
root = tk.Tk()
root.title("tk8.py")
root.geometry("200x200")
#####################################
def bClick1(event): # Click mouse left button
    lb.config(text = 'Click 1 once')
    root.config(bg = 'red')
def bClick2(event): # Double click button-1
    print("Double click 1")
def bRelease(event): # Release Button 1
    lb.config(text = "Just release 1")
    root.config(bg = 'grey')
def mEnter(event): # Mouse enter widget
    lb.config(text = "Mouse Entered.")
def mLeave(event): # Mouse leasve widget    
    lb.config(text = "Mouse leaved.")
def focusin(event): # focused to widget
    lb.config(text = "Focused in button")
def focusout(event): # focused out widget
    lb.config(text = "Focused out")
def pressEnter(event): # press enter
    print("Enter pressed.") 
def pressKey(event): # press a key
    lb.config(text = event.keysym) # use event.char for single-character
def shiftup(event): # press shift+up
    # can also used in Alt and Control
    print("Press Shift+Up")
def configure(event): #size changed
    print(root.winfo_width(), " ", root.winfo_height() )
def motion(event): # mouse motion
    print(root.winfo_pointerxy())
    #print(event.x,' ',event.y)
    
btn = tk.Button(root, text = "Button1", \
borderwidth = 10, bg = '#0000ff', \
fg = 'yellow')
btn2 = tk.Button(root, text = "Button2",\
borderwidth = 10, bg = '#0000ff', \
fg = 'yellow')
lb = tk.Label(root, text = 'A Label', fg = 'darkgreen')

btn.pack()
btn2.pack()
btn.bind('<Button-1>', bClick1)
btn.bind('<Double-1>', bClick2)
btn.bind('<ButtonRelease>', bRelease)
btn.bind('<Enter>', mEnter)
btn.bind('<Leave>', mLeave)
btn.bind('<FocusIn>',focusin) #press tab
btn.bind('<FocusOut>',focusout)
#btn.bind('<Return>',pressEnter) # have to focus on button first
root.bind('<Return>',pressEnter) # work in window anywhere
#Can work on many other keys such as
#Tab,Cancel, F1-F12, Num-Lock,Next,End,Left,Up, Home, and so forth
root.bind('<Key>',pressKey)
root.bind("<Shift-Up>",shiftup)
root.bind("<Configure>",configure)
root.bind("<Motion>",motion)
lb.pack()
#####################################
root.mainloop()