class MyCalcWindow(Ui_MainWindow, QMainWindow):
numbers = {str(i): str(i) for i in range(10)}
science_numbers = {'pi': 'π', 'e': 'e'}
number_keys = dict(numbers.items() | science_numbers.items())
operators = {
"plus": "+",
"sub": "-",
"mul": "×",
"div": "÷",
"point": ".",
"square": "²",
"exp": "exp(",
"sqrt": "√(",
"log": "log(",
"ln": "ln(",
"leftpart": "(",
"rightpart": ")",
"sin": "sin(",
"cos": "cos(",
"tan": "tan(",
"power": "^(",
"factorial": "!",
}
operations = {
"DEL": "DEL",
"AC": "AC",
"equal": "equal",
"rand": "rand",
"inverse": "inverse",
"percent": "percent",
}
def __init__(self):
super(MyCalcWindow, self).__init__()
self.setupUi(self)
self.setFixedSize(self.width(), self.height()) # lock the window size
##################################
self.PRECISION = self.verticalSlider.value()
self.history = ""
self._history = History(parent=self)
self.compute_times = 0
self.lcdNumber.display(self.PRECISION)
self.connecter()
self.show()
self.press_AC()
def keyPressEvent(self, event):
# 这里event.key（）显示的是按键的编码
# print("按下：" + str(event.key()))
if QApplication.keyboardModifiers() == Qt.ShiftModifier:
if event.key() == Qt.Key_J:
print("press J")
self._history.next()
elif event.key() == Qt.Key_K:
print("press K")
self._history.last()
def update_history(self, equation):
self.compute_times += 1
if self.history == "":
self.history += "[{}] : {}".format(self.compute_times, equation)
else:
self.history = "\n[{}] : {}".format(self.compute_times, equation)
self.textBrowser.insertPlainText(self.history)
self.textBrowser.moveCursor(self.textBrowser.textCursor().End)
def valueChanged(self):
self.PRECISION = self.verticalSlider.value()
self.lcdNumber.display(self.PRECISION)
def connect(self, keys_dict, use_func=False, set_shortcut=False):
""" Use specific key-value to connect button clicked response
:param keys_dict:
:param use_func: if True, use `press_value` function
"""
for button_name, button_text in keys_dict.items():
btn = self.__dict__['pushButton_' + button_name]
if use_func:
func = eval("self.press_" + button_name)
btn.clicked.connect(func)
else:
btn.clicked.connect(functools.partial(self.press, button_text))
def set_shortcut(self, buttons_dict):
for button_name, button_text in buttons_dict.items():
btn = self.__dict__['pushButton_' + button_name]
btn.setShortcut(button_name[0])
def connecter(self):
# 1. numbers
self.connect(self.number_keys)
self.set_shortcut(self.number_keys)
# 2. operators
self.connect(self.operators)
self.pushButton_mul.setShortcut("*")
self.pushButton_div.setShortcut("/")
self.pushButton_plus.setShortcut("+")
self.pushButton_sub.setShortcut("-")
self.pushButton_leftpart.setShortcut("(")
self.pushButton_rightpart.setShortcut(")")
self.pushButton_power.setShortcut("^")
self.pushButton_factorial.setShortcut("!")
self.pushButton_point.setShortcut(".")
self.pushButton_sin.setShortcut("S")
self.pushButton_cos.setShortcut("C")
self.pushButton_tan.setShortcut("T")
self.pushButton_sqrt.setShortcut("shift+^")
self.pushButton_square.setShortcut("shift+2")
self.pushButton_log.setShortcut("l")
self.pushButton_ln.setShortcut("n")
self.pushButton_rand.setShortcut("r")
self.pushButton_inverse.setShortcut("shift+/")
# 3. operations
self.connect(self.operations, use_func=True)
self.pushButton_equal.setShortcut("return")
self.pushButton_DEL.setShortcut("backspace")
self.pushButton_AC.setShortcut("shift+l")
# 4. other functions
self.verticalSlider.valueChanged.connect(self.valueChanged)
def press_inverse(self):
self.press_equal(reciprocal=True, percent=False)
def press_percent(self):
self.press_equal(reciprocal=False, percent=True)
def press_rand(self):
self.lineEdit.insert(str(random.random()))
def press(self, button_key):
self.lineEdit.insert(button_key)
def press_DEL(self):
self.lineEdit.backspace()
def press_AC(self):
self.lineEdit.setText("")
def press_equal(self, reciprocal=False, percent=False):
text = self.lineEdit.text()
if reciprocal:
text = wrapper_inverse(text)
try:
result, equation = calculate(text, self.PRECISION, percent)
self.lineEdit.setText(str(result))
self.update_history(equation)
self._history.append(text)
except Exception as e:
self.lineEdit.setText(str(e))
