On 8/2/2014 6:53 PM, Nicholas Cannon wrote:
On Saturday, August 2, 2014 10:38:28 PM UTC+8, Nicholas Cannon wrote:
So i have a basic calculator program and i have a label that i want to go across
>> the top to show the numbers and stuff like on a normal calculator.
The buttons are labelled already with numbers. Whatever stuff you meant,
is not diplayed.
The only way i can make the buttons look neat and then when i keep
>> pressing one the label gets larger and then half the buttons
>> move out of the screen.
Since nothing gets bigger, I have no idea what you mean.
>> I cant seem to fix this i have tried columnspan, columnconfigure
and heaps of other stuff and non works it always expands.
>> is there a way i can stop the grid from expanding?
If I shrink the window horizontally, the minimun size is 3 columns.
If I shrink vertically, bottom buttons disappear. I am not sure why.
ok here is the code:
Only some of it.
from tkinter import *
def add(*args): print(args)
#window setup
main = Tk()
main.title('Calculator')
main.geometry('300x350')
main.resizable()
app = Frame(main)
app.grid()
app.columnconfigure(0, weight=500)
app.columnconfigure(1, weight=500)
You left out column 2.
#number view label
number = ' '
numberView = Label(app, text= number)
numberView.grid(row=0, column=0, columnspan=100)
What you need for a changing label is
number = StringVar()
number.set('')
numberView = Label(app, textvariable=number)
but see below
#Num Pad Buttons below
num1 = '1'
button1 = Button(app, text='1', command= lambda: add(num1), width=5)
button1.grid(row=1, column=0)
You are using the braindead telephone keypad layout.
Calculators and number keypads have the more sensible layout
7 8 9
4 5 6
1 2 3
0
num2 = '2'
button1 = Button(app, text='2', command= lambda: add(num2), width=5)
button1.grid(row=1, column=1)
num3 = '3'
button1 = Button(app, text='3', command= lambda: add(num3), width=5)
button1.grid(row=1, column=2)
num4 = '4'
button1 = Button(app, text='4', command= lambda: add(num4), width=5)
button1.grid(row=2, column=0)
num5 = '5'
button1 = Button(app, text='5', command= lambda: add(num5), width=5)
button1.grid(row=2, column=1)
num6 = '6'
button1 = Button(app, text='6', command= lambda: add(num6), width=5)
button1.grid(row=2, column=2)
num7 = '7'
button1 = Button(app, text='7', command= lambda: add(num7), width=5)
button1.grid(row=3, column=0)
num8 = '8'
button1 = Button(app, text='8', command= lambda: add(num8), width=5)
button1.grid(row=3, column=1)
num9 = '9'
button1 = Button(app, text='9', command= lambda: add(num9), width=5)
button1.grid(row=3, column=2)
num0 = '0'
button1 = Button(app, text='0', command= lambda: add(num0), width=5)
button1.grid(row=4, column=1)
)
This sort of repetitious code is crying for a loop. For one thing, if
you want to change the buttons, there should only be one Button call to
modify. Since I am still learning to write tkinter myself, I wrote the
following, which I suspect does what you wanted and a bit more.
from tkinter import *
main = Tk()
main.title('Calculator')
main.geometry('300x350')
#main.resizable() # does nothing
app = Frame(main)
app.grid()
total = IntVar()
total.set(0)
entry = StringVar()
entry.set('')
Label(app, text='Total').grid(row=0, column=0)
Label(app, textvariable=total).grid(row=0, column=1, columnspan=3)
Label(app, text='Entry').grid(row=1, column=0)
Label(app, textvariable=entry).grid(row=1, column=1, columnspan=3)
def append(digit):
entry.set(entry.get() + digit)
def add():
total.set(total.get() + int(entry.get()))
entry.set('')
def sub():
total.set(total.get() - int(entry.get()))
entry.set('')
header_rows = 2
for num, r, c in (
('7', 0, 0), ('8', 0, 1), ('9', 0, 2),
('4', 1, 0), ('5', 1, 1), ('6', 1, 2),
('1', 2, 0), ('2', 2, 1), ('3', 2, 2),
('0', 3, 0), ('+', 3, 1), ('-', 3, 2),):
cmd = {'+':add, '-':sub}.get(num, lambda num=num: append(num))
b = Button(app, text=num, command=cmd, width=5)
b.grid(row=header_rows+r, column=c)
main.mainloop()
--
Terry Jan Reedy
--
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