Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
am i not doing that then? did u look at the code? where do i add the bind if this: btnDisplay = Button(self, text=1, command=self.Display) btnDisplay.grid(row=3, column=0, padx=5, pady=5) is not enough? def Display(self, event_obj): button = event_obj.widget text = button.cget(text) if text==1: print 1 i get this exception so i need to pass another argument? im passing 2 no? Exception in Tkinter callback Traceback (most recent call last): File C:\Python25\lib\lib-tk\Tkinter.py, line 1403, in __call__ return self.func(*args) TypeError: Display() takes exactly 2 arguments (1 given) -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
On Fri, 04 Apr 2008 20:26:13 -0700, 7stud wrote:
However, there is another way to cause a function to execute when an
event, like a button click, occurs on a widget: you use the widget's
bind() function:
my_button.bind('Button-1', someFunc)
That's a bad idea because now the `Button` doesn't act like a typical
button anymore. This fires *always* and as soon as you press the mouse
button on it. Compare this with the usual and from end users point of
view expected behavior that pressing down the mouse button presses the
button widget visually but doesn't cause any action until you release the
button while still over it. This for instance makes it possible to change
your mind and move the mouse cursor out of the buttons area with a pressed
mouse button and prevent the action of that button.
The preferred way to bind actions to `Button`\s is the `command` argument.
The function is called with no arguments when the button is pressed, so it
has to know all data it needs to fulfill its task. Usually this is done
with anonymous functions and bound default values for short pieces of
variable data::
def __init__(self):
# ...
button = Button(self,
text='1',
command=lambda n=1: self.display(n))
# ...
def display(self, number):
print number
Ciao,
Marc 'BlackJack' Rintsch
--
http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
[EMAIL PROTECTED] wrote: one thing i dont rally get, i ahve to add my_button.bind() somewhere? i changed the stuff u said though and i get this error(the program executes though and i can press the buttons): Exception in Tkinter callback Traceback (most recent call last): File C:\Python25\lib\lib-tk\Tkinter.py, line 1403, in __call__ return self.func(*args) TypeError: Display() takes exactly 2 arguments (1 given) current version: #! /usr/bin/env python from Tkinter import * import tkMessageBox class GUIFramework(Frame): This is the GUI def __init__(self,master=None): Initialize yourself Initialise the base class Frame.__init__(self,master) Set the Window Title self.master.title(Calculator) Display the main window with a little bit of padding self.grid(padx=10,pady=10) self.CreateWidgets() def CreateWidgets(self): enText = Entry(self) enText.grid(row=0, column=0, columnspan=8, padx=5, pady=5) enText = Entry(self) enText.grid(row=1, column=0, columnspan=8, padx=5, pady=5) btnDisplay = Button(self, text=1, command=self.Display) btnDisplay.grid(row=3, column=0, padx=5, pady=5) You still have this in your code: btnDisplay = Button(self, text=1, command=self.Display) I suggest you reread my earlier post again. Or, follow the advice given by Marc 'BlackJack' Rintsch (preferable). But whatever you do, don't use both command and bind(). -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
En Sat, 05 Apr 2008 03:02:02 -0300, [EMAIL PROTECTED] escribió: am i not doing that then? did u look at the code? where do i add the bind if this: btnDisplay = Button(self, text=1, command=self.Display) btnDisplay.grid(row=3, column=0, padx=5, pady=5) is not enough? Yes, I looked at the code, andn I don't see the word bind anywhere, do you? def Display(self, event_obj): button = event_obj.widget text = button.cget(text) if text==1: print 1 This Display method is OK for *bind* but you're using *command*. Read the previous response and in particular the Tkinter book - from the same guy who wrote the library. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
[EMAIL PROTECTED] wrote: [stuff, including quoted copies of an original program and its replacement] and the self. i erased, should i do it in the def __init__ as well or only as i did in createwidgets-function? Your posts would be easier to consider if you trimmed out the stuff that's no longer relevant. I for one pretty much just skipped over them because of their tedious length. Just thought I'd mention it. regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
Il Fri, 04 Apr 2008 20:26:13 -0700, 7stud ha scritto: On Apr 4, 7:06 pm, [EMAIL PROTECTED] wrote: 1st question: when i run this program 1 will be printed into the interpreter when i run it BUT without me clicking the actual button. when i then click the button 1, nothing happens. obv i dont want any output when i dont push the button but i want it when i do. what am i doing wrong here? ... The same thing is happening in this portion of your code: command = self.Display(1) That code tells python to execute the Display function and assign the function's return value to the variable command. As a result Display executes and 1 is displayed. Then since Dispay does not have a return statement, None is returned, and None is assigned to command. Obviously, that is not what you want to do. What you want to do is assign a function reference to command so that python can execute the function sometime later when you click on the button. A function reference is just the function name without the '()' after it. So you would write: command = self.Display But writing it like that doesn't allow *you* to pass any arguments to Display(). In addition, *tkinter* does not pass any arguments to Display when tkinter calls Display in response to a button click. As a result, there is no way to pass an argument to Display. It should be added here that in Python you have several ways get around this Tkinter limitation and pass an user argument to the callback. Once upon a time , back in Python 1.x, I used to do something like this: class CallIt: def __init__(self, f, *args): self.f = f self.args = args def __call__(self): return apply(self.f, self.args) and then, to do what the OP wanted to do: command = CallIt(self.Display, 1) but nowadays, you can achieve the same effect with: command = functtools.partial(self.Display,1) Ciao FB -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
Francesco Bochicchio wrote: It should be added here that in Python you have several ways get around this Tkinter limitation and pass an user argument to the callback. Once upon a time , back in Python 1.x, I used to do something like this: class CallIt: def __init__(self, f, *args): self.f = f self.args = args def __call__(self): return apply(self.f, self.args) and then, to do what the OP wanted to do: command = CallIt(self.Display, 1) but nowadays, you can achieve the same effect with: command = functtools.partial(self.Display,1) or, much clearer for non-guru programmers, and a lot easier to extend when you realize that you have to do more than just calling a single method, use a local callback function: def do_display(): self.Display(1) w = Button(callback=do_display) local functions are cheap in Python; creating a new one for each button is very inexpensive. for very simple callbacks, you can use the lambda syntax as well: w = Button(callback=lambda: self.Display(1)) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
def __init__(self): # ... button = Button(self, text='1', command=lambda n=1: self.display(n)) # ... def display(self, number): print number should this really be inside the __init__ function? -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
[EMAIL PROTECTED] wrote: def __init__(self): # ... button = Button(self, text='1', command=lambda n=1: self.display(n)) # ... def display(self, number): print number should this really be inside the __init__ function? what's wrong with creating widgets in an __init__ method? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
On 5 Apr, 17:09, Fredrik Lundh [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: def __init__(self): # ... button = Button(self, text='1', command=lambda n=1: self.display(n)) # ... def display(self, number): print number should this really be inside the __init__ function? what's wrong with creating widgets in an __init__ method? /F i dont know, i used a piece of code i found which had a createwidgets- method. isnt init a function, not a method btw(or it is the same thing?) this is the current code, only included 2 buttons here to make it shorter. i might still have misinterpreted though, is the code correct(it runs correct at least...)? whats the advantage/disadvante to have it inside the init? #! /usr/bin/env python from Tkinter import * import tkMessageBox class GUIFramework(Frame): This is the GUI def __init__(self, master=None): Initialize yourself Initialise the base class Frame.__init__(self,master) Set the Window Title self.master.title(Calculator) Display the main window with a little bit of padding self.grid(padx=10,pady=10) self.CreateWidgets() def CreateWidgets(self): self.btnDisplay = Button(self,text='1',command=lambda n=1:self.Display(n)) self.btnDisplay.grid(row=3, column=0, padx=5, pady=5) self.btnDisplay = Button(self,text='/',command=lambda n=/:self.Display(n)) self.btnDisplay.grid(row=6, column=3, padx=5, pady=5) def Display(self, number): print number if __name__ == __main__: guiFrame = GUIFramework() guiFrame.mainloop() -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
[EMAIL PROTECTED] wrote: i dont know, i used a piece of code i found which had a createwidgets- method. isnt init a function, not a method btw(or it is the same thing?) a method is a function defined inside a class statement, and which is designed to be called via an instance of that class. def function(): print this is a function def Class: def method(self): print this is a method function() # calls a function obj = Class() # create an instance (call __init__ if present) obj.method() # calls a method __init__ is automatically called when Python creates a new instance. if you create the widgets inside the init method or inside a separate method that's called from the init method (or from the outside) is up to you. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
On Apr 5, 12:02 am, [EMAIL PROTECTED] wrote: am i not doing that then? did u look at the code? where do i add the bind if this: btnDisplay = Button(self, text=1, command=self.Display) btnDisplay.grid(row=3, column=0, padx=5, pady=5) is not enough? def Display(self, event_obj): button = event_obj.widget text = button.cget(text) if text==1: print 1 i get this exception so i need to pass another argument? im passing 2 no? 1) Post the line in your code that passes two arguments to Display. 2) Post the line in yoru code where you call Display. call means execute, and '()' is used after a function name to execute the function. -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
it works now. here is all the code: #! /usr/bin/env python from Tkinter import * import tkMessageBox class GUIFramework(Frame): This is the GUI def __init__(self, master=None): Initialize yourself Initialise the base class Frame.__init__(self,master) Set the Window Title self.master.title(Calculator) Display the main window with a little bit of padding self.grid(padx=10,pady=10) self.CreateWidgets() def CreateWidgets(self): ##Create the Entry, set it to be a bit wider ##self.enText = Entry(self) ##self.enText.grid(row=0, column=0, columnspan=3) Create the Button, set the text and the command that will be called when the button is clicked self.btnDisplay = Button(self, text=calculate!, state=DISABLED) self.btnDisplay.grid(row=0, column=31) self.btnDisplay = Button(self,text='1',command=lambda n=1:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=3, column=0, padx=5, pady=5) self.btnDisplay = Button(self,text='2',command=lambda n=2:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=3, column=1, padx=5, pady=5) self.btnDisplay = Button(self,text='3',command=lambda n=3:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=3, column=2, padx=5, pady=5) self.btnDisplay = Button(self,text='+',command=lambda n=+:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=3, column=3, padx=5, pady=5) self.btnDisplay = Button(self,text='4',command=lambda n=4:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=4, column=0, padx=5, pady=5) self.btnDisplay = Button(self,text='5',command=lambda n=5:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=4, column=1, padx=5, pady=5) self.btnDisplay = Button(self,text='6',command=lambda n=6:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=4, column=2, padx=5, pady=5) self.btnDisplay = Button(self,text='-',command=lambda n=-:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=4, column=3, padx=5, pady=5) self.btnDisplay = Button(self,text='7',command=lambda n=7:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=5, column=0, padx=5, pady=5) self.btnDisplay = Button(self,text='8',command=lambda n=8:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=5, column=1, padx=5, pady=5) self.btnDisplay = Button(self,text='9',command=lambda n=9:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=5, column=2, padx=5, pady=5) self.btnDisplay = Button(self,text='*',command=lambda n=*:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=5, column=3, padx=5, pady=5) self.btnDisplay = Button(self,text='0',command=lambda n=0:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=6, column=0, padx=5, pady=5) self.btnDisplay = Button(self,text='C',command=lambda n=C:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=6, column=1, padx=5, pady=5) self.btnDisplay = Button(self,text='r',command=lambda n=r:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=6, column=2, padx=5, pady=5) self.btnDisplay = Button(self,text='/',command=lambda n=/:self.Display(n),width=1,height=1) self.btnDisplay.grid(row=6, column=3, padx=5, pady=5) def Display(self, number): #print number self.lbText = Label(self, text=number) self.lbText.grid(row=0, column=0) if __name__ == __main__: guiFrame = GUIFramework() guiFrame.mainloop() -- http://mail.python.org/mailman/listinfo/python-list
TKinter, buttonwidget response problem(1) and all btns the same size(2)!
1st question: when i run this program 1 will be printed into the interpreter when i run it BUT without me clicking the actual button. when i then click the button 1, nothing happens. obv i dont want any output when i dont push the button but i want it when i do. what am i doing wrong here? 2nd question: i want all the buttons to have the same size. i thought i should use row/columnspan but i dont get that to work. how should i do? [code] #! /usr/bin/env python from Tkinter import * import tkMessageBox class GUIFramework(Frame): This is the GUI def __init__(self,master=None): Initialize yourself Initialise the base class Frame.__init__(self,master) Set the Window Title self.master.title(Calculator) Display the main window with a little bit of padding self.grid(padx=10,pady=10) self.CreateWidgets() def CreateWidgets(self): self.enText = Entry(self) self.enText.grid(row=0, column=0, columnspan=8, padx=5, pady=5) self.enText = Entry(self) self.enText.grid(row=1, column=0, columnspan=8, padx=5, pady=5) self.btnDisplay = Button(self, text=1, command=self.Display(1)) self.btnDisplay.grid(row=3, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=2, default=ACTIVE) self.btnDisplay.grid(row=3, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=3, default=ACTIVE) self.btnDisplay.grid(row=3, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=+, default=ACTIVE) self.btnDisplay.grid(row=3, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=4, default=ACTIVE) self.btnDisplay.grid(row=4, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=5, default=ACTIVE) self.btnDisplay.grid(row=4, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=6, default=ACTIVE) self.btnDisplay.grid(row=4, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=-, default=ACTIVE) self.btnDisplay.grid(row=4, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=7, default=ACTIVE) self.btnDisplay.grid(row=5, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=8, default=ACTIVE) self.btnDisplay.grid(row=5, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=9, default=ACTIVE) self.btnDisplay.grid(row=5, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=*, default=ACTIVE) self.btnDisplay.grid(row=5, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=0, default=ACTIVE) self.btnDisplay.grid(row=6, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=C, default=ACTIVE) self.btnDisplay.grid(row=6, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=r, default=ACTIVE) self.btnDisplay.grid(row=6, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=/, default=ACTIVE) self.btnDisplay.grid(row=6, column=3, padx=5, pady=5) def Display(self, xbtn): if xbtn==1: print 1 if __name__ == __main__: guiFrame = GUIFramework() guiFrame.mainloop() [/code] -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
On Apr 4, 7:06 pm, [EMAIL PROTECTED] wrote:
1st question:
when i run this program 1 will be printed into the interpreter when i
run it BUT without me clicking the actual button.
when i then click the button 1, nothing happens.
obv i dont want any output when i dont push the button but i want it
when i do.
what am i doing wrong here?
2nd question:
i want all the buttons to have the same size. i thought i should use
row/columnspan but i dont get that to work.
how should i do?
[code]
#! /usr/bin/env python
from Tkinter import *
import tkMessageBox
class GUIFramework(Frame):
This is the GUI
def __init__(self,master=None):
Initialize yourself
Initialise the base class
Frame.__init__(self,master)
Set the Window Title
self.master.title(Calculator)
Display the main window
with a little bit of padding
self.grid(padx=10,pady=10)
self.CreateWidgets()
def CreateWidgets(self):
self.enText = Entry(self)
self.enText.grid(row=0, column=0, columnspan=8, padx=5,
pady=5)
self.enText = Entry(self)
self.enText.grid(row=1, column=0, columnspan=8, padx=5,
pady=5)
self.btnDisplay = Button(self, text=1,
command=self.Display(1))
self.btnDisplay.grid(row=3, column=0, padx=5, pady=5)
self.btnDisplay = Button(self, text=2, default=ACTIVE)
self.btnDisplay.grid(row=3, column=1, padx=5, pady=5)
self.btnDisplay = Button(self, text=3, default=ACTIVE)
self.btnDisplay.grid(row=3, column=2, padx=5, pady=5)
self.btnDisplay = Button(self, text=+, default=ACTIVE)
self.btnDisplay.grid(row=3, column=3, padx=5, pady=5)
self.btnDisplay = Button(self, text=4, default=ACTIVE)
self.btnDisplay.grid(row=4, column=0, padx=5, pady=5)
self.btnDisplay = Button(self, text=5, default=ACTIVE)
self.btnDisplay.grid(row=4, column=1, padx=5, pady=5)
self.btnDisplay = Button(self, text=6, default=ACTIVE)
self.btnDisplay.grid(row=4, column=2, padx=5, pady=5)
self.btnDisplay = Button(self, text=-, default=ACTIVE)
self.btnDisplay.grid(row=4, column=3, padx=5, pady=5)
self.btnDisplay = Button(self, text=7, default=ACTIVE)
self.btnDisplay.grid(row=5, column=0, padx=5, pady=5)
self.btnDisplay = Button(self, text=8, default=ACTIVE)
self.btnDisplay.grid(row=5, column=1, padx=5, pady=5)
self.btnDisplay = Button(self, text=9, default=ACTIVE)
self.btnDisplay.grid(row=5, column=2, padx=5, pady=5)
self.btnDisplay = Button(self, text=*, default=ACTIVE)
self.btnDisplay.grid(row=5, column=3, padx=5, pady=5)
self.btnDisplay = Button(self, text=0, default=ACTIVE)
self.btnDisplay.grid(row=6, column=0, padx=5, pady=5)
self.btnDisplay = Button(self, text=C, default=ACTIVE)
self.btnDisplay.grid(row=6, column=1, padx=5, pady=5)
self.btnDisplay = Button(self, text=r, default=ACTIVE)
self.btnDisplay.grid(row=6, column=2, padx=5, pady=5)
self.btnDisplay = Button(self, text=/, default=ACTIVE)
self.btnDisplay.grid(row=6, column=3, padx=5, pady=5)
def Display(self, xbtn):
if xbtn==1:
print 1
if __name__ == __main__:
guiFrame = GUIFramework()
guiFrame.mainloop()
[/code]
If you have this function:
def f():
print 1
return 10
and you write:
result = f()
The '()' is the function execution operator; it tells python to
execute the function. In this case, the function executes, and then
the return value of the function is assigned to the variable result.
If a function does not have a return statement, then the function
returns None by default.
The same thing is happening in this portion of your code:
command = self.Display(1)
That code tells python to execute the Display function and assign the
function's return value to the variable command. As a result Display
executes and 1 is displayed. Then since Dispay does not have a return
statement, None is returned, and None is assigned to command.
Obviously, that is not what you want to do.
What you want to do is assign a function reference to command so
that python can execute the function sometime later when you click on
the button. A function reference is just the function name without
the '()' after it. So you would write:
command = self.Display
But writing it like that doesn't allow *you* to pass any arguments to
Display(). In addition, *tkinter* does not pass any arguments to
Display when tkinter calls Display in response to a button click. As
a result, there is no way to pass an argument to Display.
However, there is another way to cause a function to execute when an
event, like a button click, occurs on a widget: you use the widget's
bind() function:
my_button.bind('Button-1', someFunc)
The first argument tells tkinter
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
On 5 Apr, 05:26, 7stud [EMAIL PROTECTED] wrote: On Apr 4, 7:06 pm, [EMAIL PROTECTED] wrote: 1st question: when i run this program 1 will be printed into the interpreter when i run it BUT without me clicking the actual button. when i then click the button 1, nothing happens. obv i dont want any output when i dont push the button but i want it when i do. what am i doing wrong here? 2nd question: i want all the buttons to have the same size. i thought i should use row/columnspan but i dont get that to work. how should i do? [code] #! /usr/bin/env python from Tkinter import * import tkMessageBox class GUIFramework(Frame): This is the GUI def __init__(self,master=None): Initialize yourself Initialise the base class Frame.__init__(self,master) Set the Window Title self.master.title(Calculator) Display the main window with a little bit of padding self.grid(padx=10,pady=10) self.CreateWidgets() def CreateWidgets(self): self.enText = Entry(self) self.enText.grid(row=0, column=0, columnspan=8, padx=5, pady=5) self.enText = Entry(self) self.enText.grid(row=1, column=0, columnspan=8, padx=5, pady=5) self.btnDisplay = Button(self, text=1, command=self.Display(1)) self.btnDisplay.grid(row=3, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=2, default=ACTIVE) self.btnDisplay.grid(row=3, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=3, default=ACTIVE) self.btnDisplay.grid(row=3, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=+, default=ACTIVE) self.btnDisplay.grid(row=3, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=4, default=ACTIVE) self.btnDisplay.grid(row=4, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=5, default=ACTIVE) self.btnDisplay.grid(row=4, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=6, default=ACTIVE) self.btnDisplay.grid(row=4, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=-, default=ACTIVE) self.btnDisplay.grid(row=4, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=7, default=ACTIVE) self.btnDisplay.grid(row=5, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=8, default=ACTIVE) self.btnDisplay.grid(row=5, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=9, default=ACTIVE) self.btnDisplay.grid(row=5, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=*, default=ACTIVE) self.btnDisplay.grid(row=5, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=0, default=ACTIVE) self.btnDisplay.grid(row=6, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=C, default=ACTIVE) self.btnDisplay.grid(row=6, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=r, default=ACTIVE) self.btnDisplay.grid(row=6, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=/, default=ACTIVE) self.btnDisplay.grid(row=6, column=3, padx=5, pady=5) def Display(self, xbtn): if xbtn==1: print 1 if __name__ == __main__: guiFrame = GUIFramework() guiFrame.mainloop() [/code] If you have this function: def f(): print 1 return 10 and you write: result = f() The '()' is the function execution operator; it tells python to execute the function. In this case, the function executes, and then the return value of the function is assigned to the variable result. If a function does not have a return statement, then the function returns None by default. The same thing is happening in this portion of your code: command = self.Display(1) That code tells python to execute the Display function and assign the function's return value to the variable command. As a result Display executes and 1 is displayed. Then since Dispay does not have a return statement, None is returned, and None is assigned to command. Obviously, that is not what you want to do. What you want to do is assign a function reference to command so that python can execute the function sometime later when you click on the button. A function reference is just the function name without the '()' after it. So you would write: command = self.Display But writing it like that doesn't allow *you* to pass any arguments to Display(). In addition, *tkinter* does not pass any arguments to Display when tkinter calls Display in response to a button click. As a result, there is no way to pass an argument to Display. However, there is another way to cause a function to execute when an
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
On 5 Apr, 05:57, [EMAIL PROTECTED] wrote: On 5 Apr, 05:26, 7stud [EMAIL PROTECTED] wrote: On Apr 4, 7:06 pm, [EMAIL PROTECTED] wrote: 1st question: when i run this program 1 will be printed into the interpreter when i run it BUT without me clicking the actual button. when i then click the button 1, nothing happens. obv i dont want any output when i dont push the button but i want it when i do. what am i doing wrong here? 2nd question: i want all the buttons to have the same size. i thought i should use row/columnspan but i dont get that to work. how should i do? [code] #! /usr/bin/env python from Tkinter import * import tkMessageBox class GUIFramework(Frame): This is the GUI def __init__(self,master=None): Initialize yourself Initialise the base class Frame.__init__(self,master) Set the Window Title self.master.title(Calculator) Display the main window with a little bit of padding self.grid(padx=10,pady=10) self.CreateWidgets() def CreateWidgets(self): self.enText = Entry(self) self.enText.grid(row=0, column=0, columnspan=8, padx=5, pady=5) self.enText = Entry(self) self.enText.grid(row=1, column=0, columnspan=8, padx=5, pady=5) self.btnDisplay = Button(self, text=1, command=self.Display(1)) self.btnDisplay.grid(row=3, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=2, default=ACTIVE) self.btnDisplay.grid(row=3, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=3, default=ACTIVE) self.btnDisplay.grid(row=3, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=+, default=ACTIVE) self.btnDisplay.grid(row=3, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=4, default=ACTIVE) self.btnDisplay.grid(row=4, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=5, default=ACTIVE) self.btnDisplay.grid(row=4, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=6, default=ACTIVE) self.btnDisplay.grid(row=4, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=-, default=ACTIVE) self.btnDisplay.grid(row=4, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=7, default=ACTIVE) self.btnDisplay.grid(row=5, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=8, default=ACTIVE) self.btnDisplay.grid(row=5, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=9, default=ACTIVE) self.btnDisplay.grid(row=5, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=*, default=ACTIVE) self.btnDisplay.grid(row=5, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=0, default=ACTIVE) self.btnDisplay.grid(row=6, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=C, default=ACTIVE) self.btnDisplay.grid(row=6, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=r, default=ACTIVE) self.btnDisplay.grid(row=6, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=/, default=ACTIVE) self.btnDisplay.grid(row=6, column=3, padx=5, pady=5) def Display(self, xbtn): if xbtn==1: print 1 if __name__ == __main__: guiFrame = GUIFramework() guiFrame.mainloop() [/code] If you have this function: def f(): print 1 return 10 and you write: result = f() The '()' is the function execution operator; it tells python to execute the function. In this case, the function executes, and then the return value of the function is assigned to the variable result. If a function does not have a return statement, then the function returns None by default. The same thing is happening in this portion of your code: command = self.Display(1) That code tells python to execute the Display function and assign the function's return value to the variable command. As a result Display executes and 1 is displayed. Then since Dispay does not have a return statement, None is returned, and None is assigned to command. Obviously, that is not what you want to do. What you want to do is assign a function reference to command so that python can execute the function sometime later when you click on the button. A function reference is just the function name without the '()' after it. So you would write: command = self.Display But writing it like that doesn't allow *you* to pass any arguments to Display(). In addition, *tkinter* does not pass any arguments to Display when tkinter calls Display in response to a button
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
On 5 Apr, 07:02, [EMAIL PROTECTED] wrote: On 5 Apr, 05:57, [EMAIL PROTECTED] wrote: On 5 Apr, 05:26, 7stud [EMAIL PROTECTED] wrote: On Apr 4, 7:06 pm, [EMAIL PROTECTED] wrote: 1st question: when i run this program 1 will be printed into the interpreter when i run it BUT without me clicking the actual button. when i then click the button 1, nothing happens. obv i dont want any output when i dont push the button but i want it when i do. what am i doing wrong here? 2nd question: i want all the buttons to have the same size. i thought i should use row/columnspan but i dont get that to work. how should i do? [code] #! /usr/bin/env python from Tkinter import * import tkMessageBox class GUIFramework(Frame): This is the GUI def __init__(self,master=None): Initialize yourself Initialise the base class Frame.__init__(self,master) Set the Window Title self.master.title(Calculator) Display the main window with a little bit of padding self.grid(padx=10,pady=10) self.CreateWidgets() def CreateWidgets(self): self.enText = Entry(self) self.enText.grid(row=0, column=0, columnspan=8, padx=5, pady=5) self.enText = Entry(self) self.enText.grid(row=1, column=0, columnspan=8, padx=5, pady=5) self.btnDisplay = Button(self, text=1, command=self.Display(1)) self.btnDisplay.grid(row=3, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=2, default=ACTIVE) self.btnDisplay.grid(row=3, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=3, default=ACTIVE) self.btnDisplay.grid(row=3, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=+, default=ACTIVE) self.btnDisplay.grid(row=3, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=4, default=ACTIVE) self.btnDisplay.grid(row=4, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=5, default=ACTIVE) self.btnDisplay.grid(row=4, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=6, default=ACTIVE) self.btnDisplay.grid(row=4, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=-, default=ACTIVE) self.btnDisplay.grid(row=4, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=7, default=ACTIVE) self.btnDisplay.grid(row=5, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=8, default=ACTIVE) self.btnDisplay.grid(row=5, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=9, default=ACTIVE) self.btnDisplay.grid(row=5, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=*, default=ACTIVE) self.btnDisplay.grid(row=5, column=3, padx=5, pady=5) self.btnDisplay = Button(self, text=0, default=ACTIVE) self.btnDisplay.grid(row=6, column=0, padx=5, pady=5) self.btnDisplay = Button(self, text=C, default=ACTIVE) self.btnDisplay.grid(row=6, column=1, padx=5, pady=5) self.btnDisplay = Button(self, text=r, default=ACTIVE) self.btnDisplay.grid(row=6, column=2, padx=5, pady=5) self.btnDisplay = Button(self, text=/, default=ACTIVE) self.btnDisplay.grid(row=6, column=3, padx=5, pady=5) def Display(self, xbtn): if xbtn==1: print 1 if __name__ == __main__: guiFrame = GUIFramework() guiFrame.mainloop() [/code] If you have this function: def f(): print 1 return 10 and you write: result = f() The '()' is the function execution operator; it tells python to execute the function. In this case, the function executes, and then the return value of the function is assigned to the variable result. If a function does not have a return statement, then the function returns None by default. The same thing is happening in this portion of your code: command = self.Display(1) That code tells python to execute the Display function and assign the function's return value to the variable command. As a result Display executes and 1 is displayed. Then since Dispay does not have a return statement, None is returned, and None is assigned to command. Obviously, that is not what you want to do. What you want to do is assign a function reference to command so that python can execute the function sometime later when you click on the button. A function reference is just the function name without the '()' after it. So you would write: command = self.Display But writing it like that doesn't allow *you* to pass any
Re: TKinter, buttonwidget response problem(1) and all btns the same size(2)!
En Sat, 05 Apr 2008 02:02:45 -0300, [EMAIL PROTECTED] escribió: one thing i dont rally get, i ahve to add my_button.bind() somewhere? i changed the stuff u said though and i get this error(the program executes though and i can press the buttons): Either use command, or bind. command requires a function with no parameters (or a bound method with self alone). bind uses a function with a single parameter, the event (or a bound method with self and event parameters). See the Tkinter book: http://www.effbot.org/tkinterbook/tkinter-events-and-bindings.htm http://www.effbot.org/tkinterbook/button.htm -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
