> Ah, right you are. I should know better than to post untested code, it's
usually buggy!
>
> I think you need to do the same thing for add(), subtract(), multiply()
and divide(). For some
> reason I don't understand, for me add works from the keyboard and multiply
doesn't!?
The same thing happened to me. That's when I realized that we were using 'x'
for the text on the multiply button and binding 'x' to multiply(), whereas
both of us were trying to use '*' to initiate multiply().
If I don't like the * in the text of the button, I'll have to set up a
seperate binding. Here's the code again, a few things changed. -Added
binding of spacebar to clear function
-Added binding of enter key to equal - for use with the
number off to the right of the keyboard.
-Changed text on button so 'x' now reads '*'
As always, Feel free to give suggestions.
Thanks for helping out so much!
Jacob Schmidt
###Start of Calculator.py###
from __future__ import division
from Tkinter import *
class Application(Frame):
def ctb(self):
if self.shouldblank:
self.distext.set('')
self.shouldblank = False
def adddigit(self, digit):
self.ctb()
self.distext.set(self.distext.get()+digit)
def adddigitdot(self):
if not self.distext.get().count('.'):
self.ctb()
self.distext.set(self.distext.get()+'.')
def equal(self):
if self.action:
self.newnum = self.distext.get()
self.newnum = str(eval(self.oldnum+self.action+self.newnum))
self.distext.set(self.newnum)
self.oldnum = '0'
self.action = ''
self.shouldblank = True
def add(self):
self.handleOperator('+')
def subtract(self):
self.handleOperator('-')
def multiply(self):
self.handleOperator('*')
def divide(self):
self.handleOperator('/')
def handleOperator(self, oper):
if self.action:
self.equal()
self.oldnum = self.distext.get()
self.action = oper
else:
self.oldnum = self.distext.get()
self.action = oper
self.shouldblank = True
def clear(self):
self.action = ''
self.oldnum = '0'
self.distext.set('0')
self.shouldblank = True
def memrecall(self):
self.distext.set(self.memory)
self.shouldblank = True
def memminus(self):
self.memory = str(eval(self.memory+"-"+self.distext.get()))
self.shouldblank = True
def memplus(self):
self.memory = str(eval(self.memory+"+"+self.distext.get()))
self.shouldblank = True
def makeButton(self, text, command, row, column):
button = Button(self,text=text,command=command,width=4,height=3)
button.grid(row=row,column=column)
if len(text) == 1:
self.bind_all(text,lambda x: command())
def createWidgets(self):
self.distext = StringVar()
self.display
=Entry(self,textvariable=self.distext,width=22,justify='right')
self.display.grid(row=0,column=1,columnspan=4)
self.makeButton(text='0',command=lambda *x:
self.adddigit('0'),row=5,column=1)
self.makeButton(text='1',command=lambda *x:
self.adddigit('1'),row=4,column=1)
self.makeButton(text='2',command=lambda *x:
self.adddigit('2'),row=4,column=2)
self.makeButton(text='3',command=lambda *x:
self.adddigit('3'),row=4,column=3)
self.makeButton(text='4',command=lambda *x:
self.adddigit('4'),row=3,column=1)
self.makeButton(text='5',command=lambda *x:
self.adddigit('5'),row=3,column=2)
self.makeButton(text='6',command=lambda *x:
self.adddigit('6'),row=3,column=3)
self.makeButton(text='7',command=lambda *x:
self.adddigit('7'),row=2,column=1)
self.makeButton(text='8',command=lambda *x:
self.adddigit('8'),row=2,column=2)
self.makeButton(text='9',command=lambda *x:
self.adddigit('9'),row=2,column=3)
self.makeButton(text='.',command=self.adddigitdot,row=5,column=2)
self.makeButton(text="=",command=self.equal,row=5,column=3)
self.makeButton(text='+',command=self.add,row=5,column=4)
self.makeButton(text="-",command=self.subtract,row=4,column=4)
self.makeButton(text='*',command=self.multiply,row=3,column=4)
self.makeButton(text='/',command=self.divide,row=2,column=4)
self.makeButton(text='ON/C',command=self.clear,row=1,column=4)
self.makeButton(text='MRC',command=self.memrecall,row=1,column=1)
self.makeButton(text="M-",command=self.memminus,row=1,column=2)
self.makeButton(text="M+",command=self.memplus,row=1,column=3)
def __init__(self, master=None):
Frame.__init__(self,master)
self.master.title("Calculator by Jacob, Inc.")
self.pack(expand=True)
self.bind_all('<space>',lambda x: self.clear())
self.bind_all('<Return>',lambda x: self.equal())
self.oldnum = '0'
self.memory = '0'
self.action = ''
self.shouldblank = True
self.createWidgets()
app = Application()
app.mainloop()
###End of Calculator.py###
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