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@amankharwal

amankharwal/calculator.py Secret

Created Dec 5, 2020
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from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
class myApp(App):
def build(self):
root_widget = BoxLayout(orientation='vertical')
output_label = Label(size_hint_y = 0.75, font_size=50)
button_symbols = ('1', '2', '3', '+',
'4', '5', '6', '-',
'7', '8', '9', '.',
'0', '*', '/', '=')
button_grid = GridLayout(cols=4, size_hint_y=2)
for symbol in button_symbols:
button_grid.add_widget(Button(text=symbol))
clear_button = Button(text = 'Clear', size_hint_y=None, height=100)
def print_button_text(instance):
output_label.text += instance.text
for button in button_grid.children[1:]:
button.bind(on_press=print_button_text)
def resize_label_text(label, new_height):
label.fontsize = 0.5*label.height
output_label.bind(height=resize_label_text)
def evaluate_result(instance):
try:
output_label.text = str(eval(output_label.text))
except SyntaxError:
output_label.text = 'Python Syntax error!'
button_grid.children[0].bind(on_press=evaluate_result)
def clear_label(instance):
output_label.text = " "
clear_button.bind(on_press=clear_label)
root_widget.add_widget(output_label)
root_widget.add_widget(button_grid)
root_widget.add_widget(clear_button)
return root_widget
myApp().run()
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