Setting up the widgets and controlling their appearance and location.

from Tkinter import *

class MyApp:
  def __init__(self, parent):
    
    button_width = 6      
    
    button_padx = "2m"    
    button_pady = "1m"    

    buttons_frame_padx =  "3m"   
    buttons_frame_pady =  "2m"       
    buttons_frame_ipadx = "3m"   
    buttons_frame_ipady = "1m"   

    self.myParent = parent   
    self.buttons_frame = Frame(parent)
    
    self.buttons_frame.pack(    
      ipadx=buttons_frame_ipadx,  
      ipady=buttons_frame_ipady,  
      padx=buttons_frame_padx,    
      pady=buttons_frame_pady,    
      )    
    
  
    self.button1 = Button(self.buttons_frame, command=self.button1Click)
    self.button1.configure(text="OK", background= "green")
    self.button1.focus_force()       
    self.button1.configure( 
      width=button_width,  
      padx=button_padx,     
      pady=button_pady     
      )

    self.button1.pack(side=LEFT)  
    self.button1.bind("<Return>", self.button1Click_a)  
    
    self.button2 = Button(self.buttons_frame, command=self.button2Click)
    self.button2.configure(text="Cancel", background="red")  
    self.button2.configure( 
      width=button_width,  
      padx=button_padx,     
      pady=button_pady     
      )
  
    self.button2.pack(side=RIGHT)
    self.button2.bind("<Return>", self.button2Click_a)   
    
  def button1Click(self):      
    if self.button1["background"] == "green":  
      self.button1["background"] = "yellow"
    else:
      self.button1["background"] = "green"
  
  def button2Click(self): 
    self.myParent.destroy()     
    
  def button1Click_a(self, event):  
    self.button1Click()
        
  def button2Click_a(self, event): 
    self.button2Click() 
  
  
      
root = Tk()
myapp = MyApp(root)
root.mainloop()

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Setting up the widgets and controlling their appearance and location. : Layout « GUI Tk « Python

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