GUI TKINTER

Common Dialog Boxes

• To Show commonly used dialog boxes tkinter provides us different functions in module tkinter.messagebox.

Message Boxes

• showinfo( title , message )
• showerror(title , message )
• showwarning(title , message )

from tkinter import *
from tkinter.messagebox import *
def show():
  showinfo("Information","Informative message")
  showerror("Error", "Error message")
  showwarning("Warning","Warning message")
win=Tk()
win.geometry("150x250")
btn=Button(win,text="Show",command=show)
btn.pack()
win.mainloop()

Ask for Confirmation Boxes

• To ask for Confirmation
• to show MessageBox with buttons yes /no etc.
  • askokcancel(title , message)
  • askretrycancel(title , message)
  • askyesno(title , message)
  • askyesnocancel(title , message)
• The return value is a Boolean, True or False, answer to the question.
• If "cancel" is an option and the user selects the "cancel" button, none is returned.

from tkinter import *
from tkinter.messagebox import *
def show():
  res=askyesno("Delete","Are You Sure ?")
  if res==True:
    showinfo("Delete","Kar Deya") 
win=Tk()
win.geometry("150x250")
btn=Button(win,text="Delete",command=show)
btn.pack()
win.mainloop()

Data Entry Dialogbox

• askstring( title , message): Will return string or None on cancel
• askinteger( title , message): Will return integer or None on cancel
• askfloat( title , message): Will return float or None on cancel

from tkinter import *
from tkinter.simpledialog import *
def show():
  answer = askstring("Input", "What is your first name?")
  if answer is not None:
    print("Your first name is ", answer)
  else:
    print("You don't have a first name?")
win=Tk()
win.geometry("150x250")
btn=Button(win,text="Show",command=show)
btn.pack()
win.mainloop()

  Your first name is  Amit