class GuiView(Tk.Frame):
VALID_OPERATIONS = ['+', '-', '*']
view_model = PolyViewModel()
def clck_bttn(self):
self.view_model.set_first_poly(self.first_poly_txt.get(1.0, Tk.END))
self.view_model.set_second_poly(self.second_poly_txt.get(1.0, Tk.END))
self.view_model.set_operation(
self.VALID_OPERATIONS[self.cmb_operation.current()])
self.view_model.computing()
self.result_label.configure(text=self.view_model.get_result())
def __init__(self):
Tk.Frame.__init__(self)
self.master.title("Polynomial calculator")
self.master.minsize(width=150, height=150)
self.grid(sticky=Tk.W + Tk.E + Tk.N + Tk.S)
self.first_poly_label = Tk.Label(
self,
text="Enter the coefficients of the " +
"first polynomial (type int) using ','",
fg='black',
font="Arial 12",
bg="light yellow")
self.first_poly_label.pack()
self.first_poly_txt = Tk.Text(self, height=1, width=40)
self.first_poly_txt.pack()
self.operation_label = Tk.Label(self,
text="Select an operation",
fg='black',
font="Arial 12",
bg="light yellow")
self.operation_label.pack()
self.cmb_operation = ttk.Combobox(self,
height=1,
width=2,
values=self.VALID_OPERATIONS)
self.cmb_operation.current(0)
self.cmb_operation.pack()
self.second_poly_label = Tk.Label(
self,
text="Enter the coefficients of the " +
"second polynomial (type int) using ','",
fg='black',
font="Arial 12",
bg="light yellow")
self.second_poly_label.pack()
self.second_poly_txt = Tk.Text(self, height=1, width=40)
self.second_poly_txt.pack()
self.calculate = Tk.Button(self,
text="Calculate",
width=15,
height=1,
font="Arial 12",
bg="light blue",
command=self.clck_bttn)
self.calculate.pack()
self.result_label = Tk.Label(self,
text="",
fg='black',
font="Arial 12",
bg="light yellow")
self.result_label.pack()
def test_init_first_poly(self):
t = PolyViewModel()
t.set_first_poly('1,2,3')
self.assertEqual('1,2,3', t.get_first_poly())
class GuiView(Tk.Frame):
VALID_OPERATIONS = ['+', '-', '*']
N_LOG_MESSAGES_TO_DISPLAY = 8
view_model = PolyViewModel()
def convert_clicked(self, event):
self.mvvm_bind()
self.view_model.computing()
self.mvvm_back_bind()
def first_poly_txt_changed(self, event):
self.mvvm_bind()
self.mvvm_back_bind()
def second_poly_txt_changed(self, event):
self.mvvm_bind()
self.mvvm_back_bind()
def operation_changed(self, event):
self.mvvm_bind()
self.mvvm_back_bind()
def bind_events(self):
self.calculate.bind('<Button-1>', self.convert_clicked)
self.first_poly_txt.bind('<KeyRelease>', self.first_poly_txt_changed)
self.second_poly_txt.bind('<KeyRelease>', self.second_poly_txt_changed)
self.cmb_operation.bind('<<ComboboxSelected>>', self.operation_changed)
def mvvm_bind(self):
self.view_model.set_first_poly(self.first_poly_txt.get("1.0", Tk.END))
self.view_model.set_second_poly(self.second_poly_txt.get(
"1.0", Tk.END))
self.view_model.set_operation(
self.VALID_OPERATIONS[self.cmb_operation.current()])
def mvvm_back_bind(self):
self.first_poly_txt.delete(1.0, Tk.END)
self.first_poly_txt.insert(Tk.END, self.view_model.get_first_poly())
self.second_poly_txt.delete(1.0, Tk.END)
self.second_poly_txt.insert(Tk.END, self.view_model.get_second_poly())
logger_text = '\n'.join(self.view_model.logger.get_log_messages()
[-self.N_LOG_MESSAGES_TO_DISPLAY:])
self.result_label.config(text='%s\n%s' %
(self.view_model.get_result(), logger_text))
def __init__(self):
Tk.Frame.__init__(self)
self.master.title("Polynomial calculator")
self.master.minsize(width=150, height=150)
self.grid(sticky=Tk.W + Tk.E + Tk.N + Tk.S)
self.first_poly_label = Tk.Label(
self,
text="Enter the coefficients of the " +
"first polynomial (type int) using ','",
fg='black',
font="Arial 12",
bg="light yellow")
self.first_poly_label.pack()
self.first_poly_txt = Tk.Text(self, height=1, width=40)
self.first_poly_txt.pack()
self.operation_label = Tk.Label(self,
text="Select an operation",
fg='black',
font="Arial 12",
bg="light yellow")
self.operation_label.pack()
self.cmb_operation = ttk.Combobox(self,
height=1,
width=2,
values=self.VALID_OPERATIONS)
self.cmb_operation.current(0)
self.cmb_operation.pack()
self.second_poly_label = Tk.Label(
self,
text="Enter the coefficients of the " +
"second polynomial (type int) using ','",
fg='black',
font="Arial 12",
bg="light yellow")
self.second_poly_label.pack()
self.second_poly_txt = Tk.Text(self, height=1, width=40)
self.second_poly_txt.pack()
self.calculate = Tk.Button(self,
text="Calculate",
width=15,
height=1,
font="Arial 12",
bg="light blue")
self.calculate.pack()
self.result_label = Tk.Label(self,
fg='black',
font="Arial 12",
bg="light yellow")
self.result_label.pack()
self.bind_events()
self.mvvm_bind()
self.mvvm_back_bind()
def test_computing_composition(self):
t = PolyViewModel()
t.set_first_poly('1,2,3')
t.set_second_poly('4,5,6,7')
t.set_operation('*')
t.computing()
self.assertEqual('4x^5 + 13x^4 + 28x^3 + 34x^2 + 32x + 21', t.get_result())
def test_computing_with_er_val(self):
t = PolyViewModel()
t.set_first_poly('1,2,3,a')
t.set_second_poly('4,5,6,7')
t.set_operation('-')
t.computing()
self.assertEqual('Coeff has no type int', t.get_result())
def test_computing_sub(self):
t = PolyViewModel()
t.set_first_poly('1,2,3')
t.set_second_poly('4,5,6,7')
t.set_operation('-')
t.computing()
self.assertEqual('-4x^3 + -4x^2 + -4x + -4', t.get_result())
def test_computing_add(self):
t = PolyViewModel()
t.set_first_poly('1,2,3')
t.set_second_poly('4,5,6,7')
t.set_operation('+')
t.computing()
self.assertEqual('4x^3 + 6x^2 + 8x + 10', t.get_result())
def test_init_operation(self):
t = PolyViewModel()
t.set_operation('-')
self.assertEqual('-', t.get_operation())