clearing a canvas in python

EEEEDIOT · Oct 2, 2007

Hi I'm a python noob and I have some homework to write a calculator using Tkinter. I have to use a canvas to draw a shape so it changes according to what I put in the calculator. I know I still have to work on refining the sizes of things. I also have a clear button. What I want to know is how to clear the canvas as well because I've looked at the Tkinter docs and I don't know how to do it.

Any help would be appreciated. Thanks

#Devin Luu 134797 Oct 1, 2007
#ICTX11

from Tkinter import *
root= Tk()

root.title("Graphic Calculator")

app = Frame(root)
app.grid()

num1=StringVar()
num2=StringVar()
num3=StringVar()

#VARS
num1=StringVar()
num2=StringVar()

#DEFS

def plus1():
firstnum=float(num1.get())
secondnum=float(num2.get())
answernum=firstnum+secondnum
num3.set(answernum)

def minus1():
firstnum=float(num1.get())
secondnum=float(num2.get())
answernum=firstnum-secondnum
num3.set(answernum)

def multiply1():
firstnum=float(num1.get())
secondnum=float(num2.get())
answernum=firstnum*secondnum
num3.set(answernum)

def divide1():
firstnum=float(num1.get())
secondnum=float(num2.get())
answernum=firstnum/secondnum
num3.set(answernum)

def cleer():
num1.set(" ")
num2.set(" ")
num3.set(" ")

def rectangle():
firstnum=float(num1.get())
secondnum=float(num2.get())
rect=canvas.create_rectangle(10,10,firstnum,secondnum, fill = "red")

def ellipse():
firstnum=float(num1.get())
secondnum=float(num2.get())
ell=canvas.create_oval(10,10,firstnum,secondnum, fill = "red")

def ans():
answernum=num3.get()
num1.set(" ")
num2.set(" ")
num3.set(" ")
num1.set(answernum)

#Number Boxes
number1=Entry(app, textvariable=num1)
number1.grid(row = 1, column = 0)

number2=Entry(app, textvariable=num2)
number2.grid(row =1, column=1)

#Operator Buttons
plus=Button(app, text="+", command = plus1, anchor=CENTER, width=5)
plus.grid(row=2,column =0)

minus=Button(app, text="-", command = minus1, anchor=CENTER, width=5)
minus.grid(row=2, column=0, sticky=E)

multiply=Button(app, text="*", command = multiply1, anchor=CENTER, width=5)
multiply.grid(row=2, column=1, sticky=W)

divide=Button(app, text="/", command = divide1, anchor=CENTER, width=5)
divide.grid(row=2, column=1)

#ANS Button
ansbutton=Button(app, text="ANS", command = ans, anchor=CENTER)
ansbutton.grid()

#Answer box
answer=Entry(app, textvariable=num3)
answer.grid()

#Draw Button
drawrect=Button(app, text="Draw a Rectangle", command=rectangle)
drawrect.grid(row= 7, column=0,sticky=E)

drawellipse=Button(app, text="Draw an Ellipse", command=ellipse)
drawellipse.grid(row=7, column=1, sticky=W)

#Canvas
canvas=Canvas(root, width=500, height=500)
canvas.grid()

#Clear Button
clearbutton=Button(root, text="CLE3R DIS SHIZNIT", command=cleer)
clearbutton.grid()

#End.
root.mainloop()
Click to expand...

Log in or Sign up

clearing a canvas in python

EEEEDIOT Specialist

Log in or Sign up

clearing a canvas in python

EEEEDIOT Specialist

Useful Searches