PySimpleGuiUltimate/calculator.py at main · clear-code-projects/PySimpleGuiUltimate · GitHub

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import PySimpleGUI as sg

def create_window(theme):
	sg.theme(theme)
	sg.set_options(font = 'Franklin 14', button_element_size = (6,3))
	button_size = (6,3)
	layout = [
		[sg.Text(
			'',
			font = 'Franklin 26',
			justification = 'right',
			expand_x = True,
			pad = (10,20),
			right_click_menu = theme_menu,
			key = '-TEXT-')
		],
		[sg.Button('Clear', expand_x = True), sg.Button('Enter', expand_x = True)],
		[sg.Button(7, size = button_size),sg.Button(8, size = button_size),sg.Button(9, size = button_size),sg.Button('*', size = button_size)],
		[sg.Button(4, size = button_size),sg.Button(5, size = button_size),sg.Button(6, size = button_size),sg.Button('/', size = button_size)],
		[sg.Button(1, size = button_size),sg.Button(2, size = button_size),sg.Button(3, size = button_size),sg.Button('-', size = button_size)],
		[sg.Button(0, expand_x = True),sg.Button('.', size = button_size),sg.Button('+', size = button_size)],
	]

	return sg.Window('Calculator', layout)

theme_menu = ['menu',['LightGrey1','dark','DarkGray8','random']]
window = create_window('dark')

current_num = []
full_operation = []

while True:
	event, values = window.read()
	if event == sg.WIN_CLOSED:
		break

	if event in theme_menu[1]:
		window.close()
		window = create_window(event)

	if event in ['0','1','2','3','4','5','6','7','8','9','.']:
		current_num.append(event)
		num_string = ''.join(current_num)
		window['-TEXT-'].update(num_string)

	if event in ['+','-','/','*']:
		full_operation.append(''.join(current_num))
		current_num = []
		full_operation.append(event)
		window['-TEXT-'].update('')

	if event == 'Enter':
		full_operation.append(''.join(current_num))
		result = eval(' '.join(full_operation))
		window['-TEXT-'].update(result)
		full_operation = []

	if event == 'Clear':
		current_num = []
		full_operation = []
		window['-TEXT-'].update('')

window.close()