On Tue, 29 Mar 2005 22:32:59 +0200, Pierre Quentel <[EMAIL PROTECTED]> wrote:
Instead of indexing self.lab by strings, you can index them by the attributes themselves : self.lab[self.i], and change line 23 into
for var in (self.s, self,i)
I really think this is asking for trouble: I suppose that the i and s attributes are meant to change at some point in the future, and you're mapping their *values* to the corresponding labels. So if the value changes, you won't be able to get the label again.
For your example, I wouldn't have used the "text" option in the definition of the labels, then "textvariable" in the callback method (procedi) ; I would have used only "text" and no IntVar or StringVar, just an integer and a string :
I would have done exactly the contrary, as it is far more easier to use. Using the textvariable option in Label's does not require you to remember the labels, but only the variables used to hold their contents. I'd also use two mappings: the first mapping a name to a Tkinter variable for the label variables, and the second for the values to give to these variables later.
Here is my version of the class code:
class MiaApp:
def __init__(self, genitore):
self.mioGenitore = genitore
## Mapping for variables
self.variables = {
"i" : StringVar(),
"s" : StringVar()
}
## Mapping for future variable values
self.values = {
"i" : 42,
"s" : "Baobab"
}
## Now, create the labels
for var in self.variables.values():
## Default text
var.set("[vuota]")
## Create label
lb = Label(self.mioGenitore, width=30, relief=RIDGE, textvariable=var)
lb.pack()
## The button is no more remembered in an attribute, as it does not seem to be needed
but = Button(self.mioGenitore, text = "Vai!", command = self.procedi)
but.pack()
def procedi(self): ## Just change the variable values for varName in self.variables.keys(): self.variables[varName].set(self.values[varName])
your technique is most interirting and clean, i must say.
nevertheless, i cannot find a natural way to "modularize" it, in such a way that the machinery of the method might be isolated from the code that uses it.
consider for example the following two programs:
....
$ cat Miodialogo.py from Tkinter import *
class MioDialogo(Toplevel):
def __init__(self, genitore, chiamante):
Toplevel.__init__(self, genitore)
self.wm_title("Valori delle variabili") self.mioGenitore = genitore
self.mioChiamante = chiamante self.fonteVar = ("Helvetica", 14) self.quadro_grande = Frame(self)
self.quadro_grande.pack(expand = YES, fill = BOTH) self.titolo = Label(self.quadro_grande)
self.titolo.configure(
text = "Valori delle variabili:",
width = 20,
font = self.fonteVar
)
self.titolo.pack(side = TOP, fill = X) def mostraVariabili(self, *argomenti):
lung = 1
for i in argomenti:
if len(i) > lung:
lung = len(i) self.dq = {}
self.dn = {}
self.dv = {}
for i in argomenti:
self.dq[i] = Frame(self.quadro_grande)
self.dq[i].pack(
side = TOP,
anchor = W,
fill = X
) self.dn[i] = Label(self.dq[i])
self.dn[i].configure(
text = i + ": ",
width = lung + 2,
anchor = W
)
self.dn[i].pack(
side = LEFT
) self.dv[i] = Label(self.dq[i])
self.dv[i].configure(
textvariable = eval("self.mioChiamante." + i),
anchor = W
)
self.dv[i].pack(
side = LEFT,
expand = YES,
fill = X
) self.vaBene = Button(self.quadro_grande)
self.vaBene.configure(
text = "Va Bene",
command = self.pulsanteVaBenePremuto,
default = ACTIVE
)
self.vaBene.bind(
"<Return>",
self.pulsanteVaBenePremuto_a
)
self.vaBene.focus_force()
self.vaBene.pack(
side = BOTTOM,
pady = 2
) def pulsanteVaBenePremuto(self):
self.destroy()
self.mioChiamante.var.configure(state = NORMAL) def pulsanteVaBenePremuto_a(self, evento):
self.pulsanteVaBenePremuto()$ cat spunta-4.py from Tkinter import * from Miodialogo import *
class MiaApp: def __init__(self, genitore):
self.mioGenitore = genitore
self.fonte = ("Helvetica", 12) self.quadro_grande = Frame(genitore)
self.quadro_grande.pack(expand = YES, fill = BOTH) self.msg = Label(self.quadro_grande)
self.msg.configure(
font = self.fonte,
wraplength = "10c",
justify = LEFT,
text = u"Sono qui sotto presentati tre pulsanti a spunta. \
Premendo un pulsante, se ne varia lo stato di selezione e si \
imposta una variabile a un valore che indica lo stato del \
pulsante stesso. Premendo il pulsante \u00ABMostra \
Variabili\u00BB si possono vedere i valori correnti delle \
variabili."
)
self.msg.pack(side = TOP) self.pulsanti = Frame(self.quadro_grande)
self.pulsanti.pack(side = BOTTOM, fill = X, padx = "2m") self.pulsanti_spunta = Frame(self.quadro_grande)
self.pulsanti_spunta.pack(side = TOP, fill = X, padx = "2m") self.annulla = Button(self.pulsanti)
self.annulla.configure(
text = "Annulla",
command = self.mioGenitore.destroy
)
self.annulla.pack(side = LEFT, expand = YES)
self.var = Button(self.pulsanti) self.var.configure( text = "Mostra Variabili", command = self.pulsanteMostraVariabiliPremuto, default = NORMAL ) self.var.pack(side = LEFT, expand = YES)
self.tergicristalli = IntVar()
self.b1 = Checkbutton(self.pulsanti_spunta)
self.b1.configure(
text = "Tergicristalli a posto",
variable = self.tergicristalli,
relief = FLAT
)
self.b1.pack(
side = TOP,
pady = 2,
anchor = W
) self.freni = IntVar()
self.b2 = Checkbutton(self.pulsanti_spunta)
self.b2.configure(
text = "Freni a posto",
variable = self.freni,
relief = FLAT
)
self.b2.pack(
side = TOP,
pady = 2,
anchor = W
) self.autista = IntVar()
self.b3 = Checkbutton(self.pulsanti_spunta)
self.b3.configure(
text = "Autista sobrio",
variable = self.autista,
relief = FLAT
)
self.b3.pack(
side = TOP,
pady = 2,
anchor = W
) def pulsanteMostraVariabiliPremuto(self):
if self.var.cget("state") == ACTIVE:
self.var.configure(state = DISABLED)
self.dialogo = MioDialogo(self.mioGenitore, self)
self.dialogo.mostraVariabili("tergicristalli",
"freni",
"autista")radice = Tk()
radice.wm_title("Dimostrazione Pulsanti a Spunta")
radice.wm_iconname("spunta")
miaApp = MiaApp(radice)
radice.mainloop()....
the program spunta-4.py uses the module Miodialogo.py, which can be usedby any other program simply passing along strings containing the names of the attributes to be displayed.
i cannot find a similar way to modularize your technique (maybe it is my fault).
thanks again
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