Tutorials

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Tutorial Showcase - Make a PDF Utility in GUI Pie

NOTE - the below tutorials were created in an earlier version of GUI Pie and do not reflect the latest methods. Modifications will need to be made to the main Python files for them to work in GUI Pie 3.0.

These main modifications are to remove the initModules() line, and replace

while True:
gui.run()

with:

gui.run().

Additional modifications may need to be made.

Tutorial 1 - Introduction to Entries, Labels and Buttons

Tutorial 2 - Multi-screened applications

IMPORTANT! Ensure all 3 files are in the same folder! For GUI Pie 3.0, do not include a .run() line for the secondary screen. Ensure the secondary screen is a 'child window' under the window hierarchy property.

Tutorial 3 - Create a calculator

Create a new file named 'calculator.py', and copy and paste in the code from below

Calculator.py

from calculatorGUI import *

from tkinter import messagebox

import math

keys = ['C', '^', '÷', 'x', '7', '8', '9', '-', '4', '5', '6', '+', '1', '2', '3', 'e', '0', '.', 'π', '=']

numbers = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', "."]

operators = ['^', '÷', 'x', '-', '+', 'e', 'π']

names = {"equals":"=" ,"divide":"÷", "minus":"-", "exponent":"^", "plus":"+", "dot":".", "pi":"π"}

def operatorsRemaining(expression):

global operators

result = False

for i in expression:

if i in operators:

result = True

else:

continue

return result

def calculate(expression):

global operators

expression = expression.split()

try:

while operatorsRemaining(expression):

if 'π' in expression:

while 'π' in expression:

if not expression[expression.index('π')-1] in operators:

try:

answer = str(float(expression[expression.index('π')-1]) * math.pi)

expression[expression.index('π')-1] = answer

del expression[expression.index('π')]

except:

expression[expression.index('π')] = str(math.pi)

else:

expression[expression.index('π')] = str(math.pi)

if "e" in expression:

while 'e' in expression:

if not expression[expression.index('e')-1] in operators:

try:

answer = str(float(expression[expression.index('e')-1]) * math.e)

expression[expression.index('e')-1] = answer

del expression[expression.index('e')]

except:

expression[expression.index('e')] = str(math.e)

else:

expression[expression.index('e')] = str(math.e)

for i in expression:

if "^" == i:

answer = str(float(expression[expression.index('^')-1]) ** float(expression[expression.index('^') + 1])) #Unfortunately this repeated section of code cannot be put into a function, as an operation needs to be written in the code, and cannot be based on a variable

expression[expression.index('^')-1] = answer

del expression[expression.index('^')+1]

del expression[expression.index('^')]

for i in expression:

if "x" == i:

answer = str(float(expression[expression.index('x')-1]) * float(expression[expression.index('x') + 1]))

expression[expression.index('x')-1] = answer

del expression[expression.index('x')+1]

del expression[expression.index('x')]

if "÷" == i:

answer = str(float(expression[expression.index('÷')-1]) / float(expression[expression.index('÷') + 1]))

expression[expression.index('÷')-1] = answer

del expression[expression.index('÷')+1]

del expression[expression.index('÷')]

for i in expression:

if "+" == i:

answer = str(float(expression[expression.index('+')-1]) + float(expression[expression.index('+') + 1]))

expression[expression.index('+')-1] = answer

del expression[expression.index('+')+1]

del expression[expression.index('+')]

if "-" == i:

answer = str(float(expression[expression.index('-')-1]) - (float(expression[expression.index('-') + 1])))

expression[expression.index('-')-1] = answer

del expression[expression.index('-')+1]

del expression[expression.index('-')]

except:

messagebox.showerror("Error", "Please input a valid mathematical expression")

return("")

return("".join(expression))

def button(btn):

btn = btn.split("_")[1]

if btn in names:

btn = names.get(btn)

if btn in numbers:

text = calculatorGUI.result.get() + btn