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calculator.py
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from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.scrollview import ScrollView
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout
from kivy.config import Config
Config.set('graphics', 'resizable', 0)
Config.set('graphics', 'width', 400)
Config.set('graphics', 'height', 500)
class MainApp(App):
font_size = 75
def add_simvol(self, instance):
text = self.label.text
if len(text) <= 25:
text = text + instance.text
self.label.text = text
def check_char(self, instance):
text = self.label.text
if text != "":
if len(text) <= 25:
if text[-1] in ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]:
self.label.text = self.label.text + instance.text
def return_result(self, instance):
if self.label.text != "":
try:
text = self.label.text
if "×" in text:
text = text.replace("×", "*")
if "÷" in text:
text = text.replace("÷", "/")
if "^" in text:
text = text.replace("^", "**")
if "√" in text:
text = text.replace("√", "**(1/2)")
text = eval(text)
self.label.text = str(text)
except Exception:
pass
self.label.text = "Error"
def clean(self, instance):
self.label.text = ""
def del_last_simvol(self, instance):
text = self.label.text
self.label.text = text[:-1]
def build(self):
main = BoxLayout(orientation = 'vertical')
######Control##########
control = GridLayout(cols = 4,
size_hint = [1, .2])
control.add_widget(Button(text = "C",
font_size = self.font_size,
on_press = self.clean))
control.add_widget(Button(text = "<×",
font_size = self.font_size,
on_press = self.del_last_simvol))
control.add_widget(Button(text = "√",
font_size = self.font_size,
on_press = self.check_char))
control.add_widget(Button(text = "^",
font_size = self.font_size,
on_press = self.check_char))
panel = BoxLayout(orientation = 'horizontal')
####Keyboard#########
keyboard = GridLayout(cols = 3, size_hint = [.6, 1],)
keyboard.add_widget(Button(
text = "7",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = "8",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = "9",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = "4",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = "5",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = "6",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = "1",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = "2",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = "3",
font_size = self.font_size,
on_press = self.add_simvol))
keyboard.add_widget(Button(
text = ".",
font_size = self.font_size,
on_press = self.check_char))
keyboard.add_widget(Button(
text = "0",
font_size = self.font_size,
on_press = self.add_simvol
))
keyboard.add_widget(Button(
text = "=",
font_size = self.font_size,
on_press = self.return_result))
#####Math operation######
math = GridLayout(cols = 1, size_hint = [.2, 1],)
math.add_widget(Button(
text = "÷",
font_size = self.font_size,
on_press = self.check_char
))
math.add_widget(Button(
text = "×",
font_size = self.font_size,
on_press = self.check_char))
math.add_widget(Button(
text = "-",
font_size = self.font_size,
on_press = self.add_simvol))
math.add_widget(Button(
text = "+",
font_size = self.font_size,
on_press = self.check_char))
panel.add_widget(keyboard)
panel.add_widget(math)
display = ScrollView(size_hint_y = .3, do_scroll = True)
self.label = Label(text = "",
font_size = 70,
size_hint_y = 1)
display.add_widget(self.label)
main.add_widget(display)
main.add_widget(control)
main.add_widget(panel)
return main
if __name__ == '__main__':
MainApp().run()