def __init__(self, parent=None):
''' initialization of the Calculator '''
QMainWindow.__init__(self, parent)
self.ui = Ui_Calcluator()
self.ui.setupUi(self)
self.numllowkeys = set([0x2a, 0x2b, 0x2d, 0x2e, 0x2f, 0x30, 0x31, \
0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3d, ] )
for i in xrange(10):
eval('QObject.connect(self.ui.button_%d, SIGNAL("clicked()"), \
partial(self.process, "%d"))' % (i, i))
sig = SIGNAL('clicked()')
QObject.connect(self.ui.button_dot, sig, partial(self.process, '.'))
QObject.connect(self.ui.button_add, sig, partial(self.process, '+'))
QObject.connect(self.ui.button_sub, sig, partial(self.process, '-'))
QObject.connect(self.ui.button_mul, sig, partial(self.process, '*'))
QObject.connect(self.ui.button_div, sig, partial(self.process, '/'))
QObject.connect(self.ui.button_cls, sig, partial(self.process, 'c'))
QObject.connect(self.ui.button_bck, sig, partial(self.process, 'b'))
QObject.connect(self.ui.button_eval, sig, partial(self.process, '='))
self.num = self.operator = self.result = None
class Main(QMainWindow):
''' Calculator Class '''
def __init__(self, parent=None):
''' initialization of the Calculator '''
QMainWindow.__init__(self, parent)
self.ui = Ui_Calcluator()
self.ui.setupUi(self)
self.numllowkeys = set([0x2a, 0x2b, 0x2d, 0x2e, 0x2f, 0x30, 0x31, \
0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3d, ] )
for i in xrange(10):
eval('QObject.connect(self.ui.button_%d, SIGNAL("clicked()"), \
partial(self.process, "%d"))' % (i, i))
sig = SIGNAL('clicked()')
QObject.connect(self.ui.button_dot, sig, partial(self.process, '.'))
QObject.connect(self.ui.button_add, sig, partial(self.process, '+'))
QObject.connect(self.ui.button_sub, sig, partial(self.process, '-'))
QObject.connect(self.ui.button_mul, sig, partial(self.process, '*'))
QObject.connect(self.ui.button_div, sig, partial(self.process, '/'))
QObject.connect(self.ui.button_cls, sig, partial(self.process, 'c'))
QObject.connect(self.ui.button_bck, sig, partial(self.process, 'b'))
QObject.connect(self.ui.button_eval, sig, partial(self.process, '='))
self.num = self.operator = self.result = None
def keyPressEvent(self, event):
''' override the keyPressEvent method '''
if event.key() in self.numllowkeys:
self.process(chr(event.key()))
def process(self, c):
text = self.ui.output_area.text()
c_is_digit = is_digit(c)
if c == '=':
if self.operator:
self.result = eval(str(self.num + self.operator + text))
self.ui.output_area.setText(str(self.result))
msg = self.num + self.operator + text + '=' + str(self.result)
self.ui.statusBar.showMessage(msg)
self.num = self.result
self.operator = None
elif c == 'c':
self.num = self.operator = None
self.ui.output_area.setText('0')
self.ui.statusBar.showMessage('')
elif c == 'b':
self.operator = None
if len(text) <= 1:
self.ui.output_area.setText('0')
else:
self.ui.output_area.setText(text[:-1])
elif not c_is_digit:
self.num = text
self.operator = c
self.ui.output_area.setText('0')
self.ui.statusBar.showMessage(text + ' ' + c)
elif text == '0':
self.ui.output_area.setText(c)
else:
self.ui.output_area.setText(self.ui.output_area.text() + c)
