def setUp(self):
self.view_model = VectorMetricsViewModel(FakeLogger())
def setUp(self):
self.viewmodel = VectorMetricsViewModel()
class GUI(ttk.Frame):
view_model = VectorMetricsViewModel()
metrics = ['L1', 'L2', 'L3', 'L4', 'Linf']
def __init__(self):
ttk.Frame.__init__(self)
self.master.title("Vector metrics calculator")
self.x_label = tk.Label(self.master, text="First vector")
self.x_label.grid(row=0, column=0)
self.x_vector = tk.Entry(self.master)
self.x_vector.grid(row=0, column=1, columnspan=2)
self.y_label = tk.Label(self.master, text="Second vector")
self.y_label.grid(row=1, column=0)
self.y_vector = tk.Entry(self.master)
self.y_vector.grid(row=1, column=1, columnspan=2)
self.metric_label = tk.Label(self.master, text="Metric")
self.metric_label.grid(row=0, column=3)
self.metrics_listbox = tk.Listbox(self.master, width=5)
for metr in self.metrics:
self.metrics_listbox.insert(tk.END, metr)
self.metrics_listbox.grid(row=1, column=3)
self.button = tk.Button(self.master, text='Compute')
self.button.grid(row=3, column=3)
self.result = tk.Label(self.master, text='Result: ')
self.result.grid(row=2, column=0, columnspan=2)
self.error_message = tk.Label(self.master, text='', wraplength=150)
self.error_message.grid(row=3, column=0, columnspan=2)
self.bind_events()
self.mvvm_back_bind()
def bind_events(self):
self.button.bind('<Button-1>', self.button_clicked)
self.x_vector.bind('<FocusOut>', self.x_vector_changed)
self.y_vector.bind('<FocusOut>', self.y_vector_changed)
self.metrics_listbox.bind('<<ListboxSelect>>',
self.metrics_listbox_changed)
def mvvm_bind(self):
x_set = self.view_model.set_x(self.x_vector.get())
if not x_set:
self.view_model.set_button_state('disabled')
return
y_set = self.view_model.set_y(self.y_vector.get())
if not y_set:
self.view_model.set_button_state('disabled')
def mvvm_back_bind(self):
self.x_vector.delete(0, tk.END)
self.x_vector.insert(tk.INSERT, self.view_model.get_x())
self.y_vector.delete(0, tk.END)
self.y_vector.insert(tk.INSERT, self.view_model.get_y())
self.result.config(text='{}'.format(self.view_model.get_result()))
self.button.config(state=self.view_model.get_button_state())
self.error_message.config(
text='{}'.format(self.view_model.get_error_message()))
def button_clicked(self, event):
self.mvvm_bind()
self.view_model.compute()
self.mvvm_back_bind()
def x_vector_changed(self, event):
self.mvvm_bind()
self.mvvm_back_bind()
def y_vector_changed(self, event):
self.mvvm_bind()
self.mvvm_back_bind()
def metrics_listbox_changed(self, event):
self.mvvm_bind()
current_selection = self.metrics_listbox.curselection()
if len(current_selection) > 0:
self.view_model.set_metric(self.metrics[current_selection[0]])
else:
self.view_model.set_button_state('disabled')
self.mvvm_back_bind()