tkinter canvas mvc

[Gigs_]

Hi all!

I have just finished my tkinter text editor, learning tkinter purpose.

Now I want to learn canvas so I want to make my paint program, I think that this
will be the best to do over model-view-controler pattern which I need to learn also.

Is there any good tutorial for mvc in python or can someone explain me little
bit about mvc?
or maybe some code snippet in mvc, that will be nice.

Thanks in advance!

 

[James Stroud]

Hi all!

I have just finished my tkinter text editor, learning tkinter purpose.

Now I want to learn canvas so I want to make my paint program, I think
that this will be the best to do over model-view-controler pattern which
I need to learn also.

Is there any good tutorial for mvc in python or can someone explain me
little bit about mvc?
or maybe some code snippet in mvc, that will be nice.

Thanks in advance!

MVC in a nutshell.

1. You need a model.
2. You need a view.
3. You need a controller.

Lets see how they work together, using dictionary-like interfaces:


class Model(dict): pass

class View(object):
def __init__(self, controller, keys):
self.controller = controller
self.widgets = {}
for k in keys:
w = make_a_widget(k)
def _callback(w=w):
v = w.get_value()
self.controller[k] = v
w.bind(SomeEvent, _callback)
self.widgets[k] = w
self.controller.register_view(self)
def __setitem__(self, k, v):
self.widgets[k].set_value(v)
def __contains__(self, k):
return k in self.widgets

class Controller(object):
def __init__(self, model):
self.views = []
self.data = model
def register_view(self, aview):
self.views.append(aview)
def __setitem__(self, k, v):
self.data[k] = v
for aview in self.views:
if k in aview:
aview[k] = v
def __getitem__(self, k):
return self.data[k]
def update(self, adict):
self.data.update(adict)
for k,v in adict.items():
for aview in self.views:
if k in aview:
aview[k] = v



James