def __init__(self, *args, **kwargs):
super(Calculator, self).__init__(*args, **kwargs)
# Single-inheritence approach: http://goo.gl/WNiHc
# Calculator class only inherits from QWidget
# A specific member attribute self.ui contains all
# widgets set up in the designer.
self.ui = Ui_Calculator()
self.ui.setupUi(self)
# Create a validator for each QLineEdit that only
# allows a user to enter floats: 123.123
self.ui.inputA.setValidator(QtGui.QDoubleValidator())
self.ui.inputB.setValidator(QtGui.QDoubleValidator())
# instead of using the stock operator values set in the
# ui file, lets set the box to match our class attribute
self.ui.operatorBox.clear()
self.ui.operatorBox.addItems(self.OPS.keys())
self.ui.clearButton.clicked.connect(self.clear)
# every time the text is edited in either input field,
# calculate the result live
self.ui.inputA.textEdited.connect(self.calc)
self.ui.inputB.textEdited.connect(self.calc)
# also when the operator box is changed
self.ui.operatorBox.currentIndexChanged.connect(self.calc)
def __init__(self, *args, **kwargs):
super(Calculator, self).__init__(*args, **kwargs)
# Single-inheritence approach: http://goo.gl/WNiHc
# Calculator class only inherits from QWidget
# A specific member attribute self.ui contains all
# widgets set up in the designer.
self.ui = Ui_Calculator()
self.ui.setupUi(self)
self.ui.calcButton = QtGui.QPushButton("Calculate")
self.ui.horizontalLayout_2.addWidget(self.ui.calcButton)
# Create a validator for each QLineEdit that only
# allows a user to enter floats: 123.123
self.ui.inputA.setValidator(QtGui.QDoubleValidator())
self.ui.inputB.setValidator(QtGui.QDoubleValidator())
# instead of using the stock operator values set in the
# ui file, lets set the box to match our class attribute
self.ui.operatorBox.clear()
self.ui.operatorBox.addItems(self.OPS.keys())
self.ui.clearButton.clicked.connect(self.clear)
self.ui.calcButton.clicked.connect(self.calc)
class Calculator(QtGui.QWidget):
OPS = {
'+': operator.add,
'-': operator.sub,
'/': operator.div,
'*': operator.mul
}
def __init__(self, *args, **kwargs):
super(Calculator, self).__init__(*args, **kwargs)
self.ui = Ui_Calculator()
self.ui.setupUi(self)
self.ui.inputA.setValidator(QtGui.QDoubleValidator(self))
self.ui.inputB.setValidator(QtGui.QDoubleValidator(self))
self.ui.operatorBox.clear()
self.ui.operatorBox.addItems(self.OPS.keys())
self.ui.clearButton.clicked.connect(self.clear)
self.ui.inputA.textEdited.connect(self.calc)
self.ui.inputB.textEdited.connect(self.calc)
self.ui.operatorBox.currentIndexChanged.connect(self.calc)
# END def __init__
def clear(self):
''' Slot to clear the fors fields'''
self.ui.inputA.clear()
self.ui.inputB.clear()
self.ui.result.clear()
# END def clear
def calc(self):
op_str = str(self.ui.operatorBox.currentText())
op = self.OPS.get(op_str)
if not op:
return
inputA = self.ui.inputA.text()
inputB = self.ui.inputB.text()
if not (inputA and inputB):
return
try:
i1 = float(inputA)
i2 = float(inputB)
result = op(i1, i2)
except Exception, e:
QtGui.QMessageBox.warning(self, "Could not calculate result",
"Result: \n%s" %e)
else:
def __init__(self, *args, **kwargs): super(Calculator, self).__init__(*args, **kwargs) # Single-inheritence approach: http://goo.gl/WNiHc # Calculator class only inherits from QWidget # A specific member attribute self.ui contains all # widgets set up in the designer. self.ui = Ui_Calculator() self.ui.setupUi(self) # Create a validator for each QLineEdit that only # allows a user to enter floats: 123.123 self.ui.inputA.setValidator(QtGui.QDoubleValidator()) self.ui.inputB.setValidator(QtGui.QDoubleValidator()) # instead of using the stock operator values set in the # ui file, lets set the box to match our class attribute self.ui.operatorBox.clear() self.ui.operatorBox.addItems(self.OPS.keys()) self.ui.clearButton.clicked.connect(self.clear) # every time the text is edited in either input field, # calculate the result live self.ui.inputA.textEdited.connect(self.calc) self.ui.inputB.textEdited.connect(self.calc) # also when the operator box is changed self.ui.operatorBox.currentIndexChanged.connect(self.calc)
def __init__(self, *args, **kwargs):
super(Calculator, self).__init__(*args, **kwargs)
self.ui = Ui_Calculator()
self.ui.setupUi(self)
self.ui.inputA.setValidator(QtGui.QDoubleValidator(self))
self.ui.inputB.setValidator(QtGui.QDoubleValidator(self))
self.ui.operatorBox.clear()
self.ui.operatorBox.addItems(self.OPS.keys())
self.ui.clearButton.clicked.connect(self.clear)
self.ui.inputA.textEdited.connect(self.calc)
self.ui.inputB.textEdited.connect(self.calc)
self.ui.operatorBox.currentIndexChanged.connect(self.calc)
class Calculator(QtGui.QWidget):
OPS = {
'+': operator.add,
'-': operator.sub,
'/': operator.div,
'*': operator.mul,
}
def __init__(self, *args, **kwargs):
super(Calculator, self).__init__(*args, **kwargs)
# Single-inheritence approach: http://goo.gl/WNiHc
# Calculator class only inherits from QWidget
# A specific member attribute self.ui contains all
# widgets set up in the designer.
self.ui = Ui_Calculator()
self.ui.setupUi(self)
# Create a validator for each QLineEdit that only
# allows a user to enter floats: 123.123
self.ui.inputA.setValidator(QtGui.QDoubleValidator())
self.ui.inputB.setValidator(QtGui.QDoubleValidator())
# instead of using the stock operator values set in the
# ui file, lets set the box to match our class attribute
self.ui.operatorBox.clear()
self.ui.operatorBox.addItems(self.OPS.keys())
self.ui.clearButton.clicked.connect(self.clear)
# every time the text is edited in either input field,
# calculate the result live
self.ui.inputA.textEdited.connect(self.calc)
self.ui.inputB.textEdited.connect(self.calc)
# also when the operator box is changed
self.ui.operatorBox.currentIndexChanged.connect(self.calc)
def clear(self):
""" Slot to clear the form fields """
self.ui.inputA.clear()
self.ui.inputB.clear()
self.ui.result.clear()
def calc(self):
""" Calculate the result from the form values """
op_str = str(self.ui.operatorBox.currentText())
op = self.OPS.get(op_str)
if not op:
return
inputA = self.ui.inputA.text()
inputB = self.ui.inputB.text()
# just silently return if either field is empty
if not (inputA and inputB):
self.ui.result.clear()
return
try:
i1 = float(inputA)
i2 = float(inputB)
result = op(i1, i2)
except Exception, e:
# inform the user if the operation results in
# an error. Such as dividing by zero.
QtGui.QMessageBox.warning(self,
"Could not calculate results",
"Reason:\n%s" % e)
else:
class Calculator(QtGui.QWidget):
OPS = {
'+': operator.add,
'-': operator.sub,
'/': operator.div,
'*': operator.mul,
}
def __init__(self, *args, **kwargs):
super(Calculator, self).__init__(*args, **kwargs)
# Single-inheritence approach: http://goo.gl/WNiHc
# Calculator class only inherits from QWidget
# A specific member attribute self.ui contains all
# widgets set up in the designer.
self.ui = Ui_Calculator()
self.ui.setupUi(self)
# Create a validator for each QLineEdit that only
# allows a user to enter floats: 123.123
self.ui.inputA.setValidator(QtGui.QDoubleValidator())
self.ui.inputB.setValidator(QtGui.QDoubleValidator())
# instead of using the stock operator values set in the
# ui file, lets set the box to match our class attribute
self.ui.operatorBox.clear()
self.ui.operatorBox.addItems(self.OPS.keys())
self.ui.clearButton.clicked.connect(self.clear)
# every time the text is edited in either input field,
# calculate the result live
self.ui.inputA.textEdited.connect(self.calc)
self.ui.inputB.textEdited.connect(self.calc)
# also when the operator box is changed
self.ui.operatorBox.currentIndexChanged.connect(self.calc)
def clear(self):
""" Slot to clear the form fields """
self.ui.inputA.clear()
self.ui.inputB.clear()
self.ui.result.clear()
def calc(self):
""" Calculate the result from the form values """
op_str = str(self.ui.operatorBox.currentText())
op = self.OPS.get(op_str)
if not op:
return
inputA = self.ui.inputA.text()
inputB = self.ui.inputB.text()
# just silently return if either field is empty
if not (inputA and inputB):
self.ui.result.clear()
return
try:
i1 = float(inputA)
i2 = float(inputB)
result = op(i1, i2)
except Exception, e:
# inform the user if the operation results in
# an error. Such as dividing by zero.
QtGui.QMessageBox.warning(self, "Could not calculate results",
"Reason:\n%s" % e)
else:
