[Tkinter-discuss] [Fwd: Re: Calling functions outside the class]

[craf]

--------- Mensaje reenviado --------
> De: Michael O'Donnell <michael.odonnell at uam.es>
> Para: craf <prog at vtr.net>
> Cc: Python Tkinter Ingles <tkinter-discuss at python.org>
> Asunto: Re: [Tkinter-discuss] Calling functions outside the class
> Fecha: Fri, 17 Dec 2010 09:03:28 +0100
> 
> Hi Cristian,
> 
>   The problem is, self is only defined within the class definition.
> Basically, the function are not part of the class, just called by the class.
> We use a lambda to get the class passed to the function.
> So, to correct your code:
> 
> from Tkinter import *
> 
> class MyApp:
>    def __init__(self, parent):
>        self.myParent = parent  ### (7) remember my parent, the root
>        self.myContainer1 = Frame(parent)
>        self.myContainer1.pack()
> 
>        self.button1 = Button(self.myContainer1)
>        self.button1.configure(text="OK", background= "green")
>        self.button1.pack(side=LEFT)
>        self.button1.bind("<Button-1>", lambda e, win=self:
> button1Click(win)) ### (1)
> 
>        self.button2 = Button(self.myContainer1)
>        self.button2.configure(text="Cancel", background="red")
>        self.button2.pack(side=RIGHT)
>        self.button2.bind("<Button-1>", lambda e, win=self:
> button2Click(win)) ### (2)
> 
> def button1Click(win):
>    if win.button1["background"] == "green": ### (4)
>        win.button1["background"] = "yellow"
>    else:
>        win.button2["background"] = "green"
> 
> def button2Click(win):
>        win.myParent.destroy()     ### (6)
> 
> 
> root = Tk()
> myapp = MyApp(root)
> root.mainloop()
> 
> 
> root = Tk()
> myapp = MyApp(root)
> root.mainloop()
> 
> 
> 
> 
> On Fri, Dec 17, 2010 at 4:35 AM, craf <prog at vtr.net> wrote:
> > Hi.
> >
> > I'm testing this code:
> >
> > -------------------------------------------------------------------
> > from Tkinter import *
> >
> > class MyApp:
> >    def __init__(self, parent):
> >        self.myParent = parent  ### (7) remember my parent, the root
> >        self.myContainer1 = Frame(parent)
> >        self.myContainer1.pack()
> >
> >        self.button1 = Button(self.myContainer1)
> >        self.button1.configure(text="OK", background= "green")
> >        self.button1.pack(side=LEFT)
> >        self.button1.bind("<Button-1>", self.button1Click) ### (1)
> >
> >        self.button2 = Button(self.myContainer1)
> >        self.button2.configure(text="Cancel", background="red")
> >        self.button2.pack(side=RIGHT)
> >        self.button2.bind("<Button-1>", self.button2Click) ### (2)
> >
> >    def button1Click(self, event):    ### (3)
> >        if self.button1["background"] == "green": ### (4)
> >            self.button1["background"] = "yellow"
> >        else:
> >            self.button2["background"] = "green"
> >
> >    def button2Click(self, event):  ### (5)
> >        self.myParent.destroy()     ### (6)
> >
> >
> > root = Tk()
> > myapp = MyApp(root)
> > root.mainloop()
> >
> > ---------------------------------------------------------------------
> >
> > Works without problems, but if I want to get the functions of the class,
> > then the problems begin.
> >
> > from Tkinter import *
> >
> > class MyApp:
> >    def __init__(self, parent):
> >        self.myParent = parent  ### (7) remember my parent, the root
> >        self.myContainer1 = Frame(parent)
> >        self.myContainer1.pack()
> >
> >        self.button1 = Button(self.myContainer1)
> >        self.button1.configure(text="OK", background= "green")
> >        self.button1.pack(side=LEFT)
> >        self.button1.bind("<Button-1>", self.button1Click) ### (1)
> >
> >        self.button2 = Button(self.myContainer1)
> >        self.button2.configure(text="Cancel", background="red")
> >        self.button2.pack(side=RIGHT)
> >        self.button2.bind("<Button-1>", self.button2Click) ### (2)
> >
> > def button1Click(self, event):    ¡¡¡FUNCTION OUTSIDE THE CLASS!!!
> >    if self.button1["background"] == "green": ### (4)
> >        self.button1["background"] = "yellow"
> >    else:
> >        self.button2["background"] = "green"
> >
> > def button2Click(self, event): ¡¡¡FUNCTION OUTSIDE THE CLASS!!!
> >        self.myParent.destroy()     ### (6)
> >
> >
> > root = Tk()
> > myapp = MyApp(root)
> > root.mainloop()
> >
> > What would be the correct way to call them?
> >
> > Thanks in advance
> >
> > Regards
> >
> > Cristian Abarzua F
> >
> > _______________________________________________
> > Tkinter-discuss mailing list
> > Tkinter-discuss at python.org
> > http://mail.python.org/mailman/listinfo/tkinter-discuss
> >

Hi Michael

thank you very much by example. Now I understand.

Regards.

Cristian