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buttons.py
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buttons.py
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import math
from PySide6.QtCore import Slot
from PySide6.QtWidgets import QGridLayout, QPushButton
from config import FS_400
from display import Display
from info import Info
from main_window import MainWindow
from utils import convertToNumber, isEmpty, isNumOrDot, isValidNumber
class Button(QPushButton):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.configStyle()
def configStyle(self):
font = self.font()
font.setPixelSize(FS_400)
self.setFont(font)
self.setMinimumSize(75, 75)
class ButtonsGrid(QGridLayout):
def __init__(
self, display: Display, info: Info, window: MainWindow, *args, **kwargs
):
super().__init__(*args, **kwargs)
self.display = display
self.info = info
self.window = window
self._equation = ""
self.equation = "Equação"
self._left = None
self._right = None
self._op = None
self._gridMask = [
["C", "<", "^", "/"],
["7", "8", "9", "*"],
["4", "5", "6", "-"],
["1", "2", "3", "+"],
["N", "0", ".", "="],
]
self._makeGrid()
@property
def equation(self):
return self._equation
@equation.setter
def equation(self, value):
self._equation = value
self.info.setText(self._equation)
def catchSignal(self, *args):
print("Sinal recebido: ", type(self).__name__, args)
def _makeGrid(self):
self.display.eqPressed.connect(self._eq)
self.display.delPressed.connect(self._backspace)
self.display.clearPressed.connect(self._clear)
self.display.inputPressed.connect(self._insertToDisplay)
self.display.operatorPressed.connect(self._configLeftOperator)
for i, row in enumerate(self._gridMask):
for j, btn_text in enumerate(row):
btn = Button(btn_text)
if not isNumOrDot(btn_text) and not isEmpty(btn_text):
btn.setProperty("cssClass", "specialButton")
self._configSpecialBtn(btn)
self.addWidget(btn, i, j)
slot = self._makeSlot(self._insertToDisplay, btn_text)
self._connectBtnClicked(btn, slot)
def _connectBtnClicked(self, btn, slot):
btn.clicked.connect(slot)
def _configSpecialBtn(self, btn):
text = btn.text()
if text == "C":
self._connectBtnClicked(btn, self._clear)
if text == "<":
self._connectBtnClicked(btn, self._backspace)
if text == "N":
self._connectBtnClicked(btn, self._invertNumber)
if text in "+-/*^":
self._connectBtnClicked(btn, self._makeSlot(self._configLeftOperator, text))
if text == "=":
self._connectBtnClicked(btn, self._eq)
@Slot()
def _makeSlot(self, func, *args, **kwargs):
@Slot(bool)
def realSlot():
func(*args, **kwargs)
return realSlot
@Slot()
def _invertNumber(self):
displayText = self.display.text()
if not isValidNumber(displayText):
return
number = convertToNumber(displayText)
newNumber = number * -1
self.display.setText(str(newNumber))
@Slot()
def _insertToDisplay(self, text):
newDisplayValue = self.display.text() + text
if not isValidNumber(newDisplayValue):
return
self.display.insert(text)
self.display.setFocus()
@Slot()
def _clear(self):
self._left = None
self._right = None
self._op = None
self.equation = "Equação"
self.display.clear()
self.display.setFocus()
@Slot()
def _configLeftOperator(self, text):
displayText = self.display.text()
self.display.clear()
self.display.setFocus()
if not isValidNumber(displayText) and self._left is None:
self._showDialog("info", "Nada foi digitado")
return
if self._left is None:
self._left = convertToNumber(displayText)
self._op = text
self.equation = f"{self._left} {self._op} ??"
@Slot()
def _eq(self):
displayText = self.display.text()
if not isValidNumber(displayText) or self._left is None:
self._showDialog("info", "Conta incompleta")
return
self._right = convertToNumber(displayText)
self.equation = f"{self._left} {self._op} {self._right}"
result = "error"
try:
if "^" in self.equation and isinstance(self._left, (int, float)):
result = math.pow(self._left, self._right)
result = convertToNumber(str(result))
else:
result = eval(self.equation)
except ZeroDivisionError:
self._showDialog("error", "Divisão por zero x_x")
except OverflowError:
self._showDialog("error", "O resultado foi um número muito grande")
self.display.clear()
self.info.setText(f"{self.equation} = {result}")
self._left = result
self._right = None
self.display.setFocus()
if result == "error":
self._left = None
@Slot()
def _backspace(self):
self.display.backspace()
self.display.setFocus()
def _showDialog(self, type: str, text):
msgBox = self.window.makeMsgBox()
msgBox.setText(text)
if type == "error":
icon = msgBox.Icon.Critical
else:
icon = msgBox.Icon.Information
msgBox.setIcon(icon)
msgBox.exec()