PythonScript/adder.py at master · alciomarhollanda/PythonScript · GitHub

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"""adder.py
~~~~~~

Creates a simple GUI for summing two numbers.
"""

import tkinter
from tkinter import ttk

class Adder(ttk.Frame):
    """The adders gui and functions."""
    def __init__(self, parent, *args, **kwargs):
        ttk.Frame.__init__(self, parent, *args, **kwargs)
        self.root = parent
        self.init_gui()

    def on_quit(self):
        """Exits program."""
        quit()

    def calculate(self):
        """Calculates the sum of the two inputted numbers."""
        num1 = int(self.num1_entry.get())
        num2 = int(self.num2_entry.get())
        num3 = num1 + num2
        self.answer_label['text'] = num3

    def init_gui(self):
        """Builds GUI."""
        self.root.title('Number Adder')
        self.root.option_add('*tearOff', 'FALSE')

        self.grid(column=0, row=0, sticky='nsew')

        self.menubar = tkinter.Menu(self.root)

        self.menu_file = tkinter.Menu(self.menubar)
        self.menu_file.add_command(label='Exit', command=self.on_quit)

        self.menu_edit = tkinter.Menu(self.menubar)

        self.menubar.add_cascade(menu=self.menu_file, label='File')
        self.menubar.add_cascade(menu=self.menu_edit, label='Edit')

        self.root.config(menu=self.menubar)

        self.num1_entry = ttk.Entry(self, width=5)
        self.num1_entry.grid(column=1, row = 2)

        self.num2_entry = ttk.Entry(self, width=5)
        self.num2_entry.grid(column=3, row=2)

        self.calc_button = ttk.Button(self, text='Calculate',
                command=self.calculate)
        self.calc_button.grid(column=0, row=3, columnspan=4)

        self.answer_frame = ttk.LabelFrame(self, text='Answer',
                height=100)
        self.answer_frame.grid(column=0, row=4, columnspan=4, sticky='nesw')

        self.answer_label = ttk.Label(self.answer_frame, text='')
        self.answer_label.grid(column=0, row=0)

        # Labels that remain constant throughout execution.
        ttk.Label(self, text='Number Adder').grid(column=0, row=0,
                columnspan=4)
        ttk.Label(self, text='Number one').grid(column=0, row=2,
                sticky='w')
        ttk.Label(self, text='Number two').grid(column=2, row=2,
                sticky='w')

        ttk.Separator(self, orient='horizontal').grid(column=0,
                row=1, columnspan=4, sticky='ew')

        for child in self.winfo_children():
            child.grid_configure(padx=5, pady=5)

if __name__ == '__main__':
    root = tkinter.Tk()
    Adder(root)
    root.mainloop()