From klappnase at web.de  Thu Feb  1 11:39:41 2007
From: klappnase at web.de (Michael Lange)
Date: Thu, 1 Feb 2007 11:39:41 +0100
Subject: [Tkinter-discuss] ImageTk.PhotoImage and semi-transparent images
Message-ID: <20070201113941.48803dee.klappnase@web.de>

Hello,

I noticed that some images do not display correctly when using
an ImageTk.PhotoImage . It seems like this only affects images
containing semi-transparent pixels (?); I have uploaded an example
of what I mean to <http://klappnase.zexxo.net/Tkimg_vs_PIL.html>.

Does anyone know if there is anything I missed to avoid this effect?
I ask because in my app I currently use Tkimg to display icons and PIL
for resizing and I would like to get rid of Tkimg, if possible.

Thanks in advance

Michael

From minadeh at yahoo.ca  Thu Feb 15 06:48:53 2007
From: minadeh at yahoo.ca (mina dehghan)
Date: Thu, 15 Feb 2007 12:48:53 +0700 (ICT)
Subject: [Tkinter-discuss] calling B1-Motion and Leave events symontaneously?
Message-ID: <728848.93156.qm@web62302.mail.re1.yahoo.com>

Hi,
 
I am trying to implement lasso  selection technique to select a set of rectangles on a canvas. When the usr leaves a rectangle while B1 is down the current rectangle is either selected or reselected. So I need to use two events:
<B1-motion> bound to the canvas  and <Leave> bound to rectangles. But only B1-motion event is called.  Does anyone know what the problem is and how 
to call B1-motion and  Leave  symontaneously?
 
Thanks,
Mina

__________________________________________________
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From busquets at silver.udg.es  Thu Feb 15 16:47:05 2007
From: busquets at silver.udg.es (=?ISO-8859-1?Q?D=EDdac_Busquets?=)
Date: Thu, 15 Feb 2007 16:47:05 +0100
Subject: [Tkinter-discuss] Problems with lambda functions in callbacks
Message-ID: <45D48079.1050506@eia.udg.es>

Hello,

I'm trying to create a set of buttons to which I assign a callback that 
is the same for all of them, except for the parameter (to do this I use 
a lambda function). I want to get the buttons numbered from 0 to 4, so 
that when I click on any of them, it prints out its number (that is, 
button 0 prints 0, button 1 prints 1, etc). The code I wrote is the 
following:

from Tkinter import *

root = Tk();

def cb(x):
    print x;
   
for i in range(5):
    b = Button(root,text=i,command=lambda:cb(i));
    b.pack();

root.mainloop();


This doesn't work, and for any button I click, I only get "4" printed 
(which is the last value of variable 'i').

Any idea about what is going on?

Thanks a lot,

    D?dac

-- 
------------------------------------------------------------------------
*D?dac Busquets i Font*

Investigador Ram?n y Cajal
Universitat de Girona
Dept. d'Electr?nica, Inform?tica i Autom?tica
Institut d'Inform?tica i Aplicacions
Edifici P-IV, Despatx 128
Campus Montilivi
17071 Girona

Tel. (+34) 972.41.81.79
Fax. (+34) 972.41.80.98
e-mail: busquets at eia.udg.es
web: http://eia.udg.es/~busquets

------------------------------------------------------------------------
Abans d'imprimir aquest correu electr?nic pensa si ?s necessari fer-ho: 
el medi ambient ?s cosa de tots.

------------------------------------------------------------------------

From stewart at midwinter.ca  Thu Feb 15 18:26:20 2007
From: stewart at midwinter.ca (Stewart Midwinter)
Date: Thu, 15 Feb 2007 10:26:20 -0700
Subject: [Tkinter-discuss] Problems with lambda functions in callbacks
In-Reply-To: <45D48079.1050506@eia.udg.es>
References: <45D48079.1050506@eia.udg.es>
Message-ID: <d4c0d4800702150926k6e508727sebf935cb32a11eb1@mail.gmail.com>

D?dac, aquest ?s un problem molt interessant.

Your code doesn't work because you didn't pass in a reference to i in your
lambda.  The correct code appears below. BTW, if you set up your application
with classes and methods, you will need to pass in a reference to self in
the same way: self=self.

from Tkinter import *

root = Tk();

def cb(x):
   print x;

for i in range(5):
   b = Button(root,text=i,command=lambda i=i:cb(i));
   b.pack();

root.mainloop();


cheers
Stewart
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From bob at passcal.nmt.edu  Thu Feb 15 18:37:56 2007
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Thu, 15 Feb 2007 10:37:56 -0700
Subject: [Tkinter-discuss] Problems with lambda functions in callbacks
In-Reply-To: <45D48079.1050506@eia.udg.es>
References: <45D48079.1050506@eia.udg.es>
Message-ID: <01EFF586-A03E-4EEC-ACD2-FA3C008E1723@passcal.nmt.edu>


On Feb 15, 2007, at 08:47, D?dac Busquets wrote:

> Hello,
>
> I'm trying to create a set of buttons to which I assign a callback  
> that
> is the same for all of them, except for the parameter (to do this I  
> use
> a lambda function). I want to get the buttons numbered from 0 to 4, so
> that when I click on any of them, it prints out its number (that is,
> button 0 prints 0, button 1 prints 1, etc). The code I wrote is the
> following:
>
> from Tkinter import *
>
> root = Tk();
>
> def cb(x):
>     print x;
>
> for i in range(5):
>     b = Button(root,text=i,command=lambda:cb(i));
>     b.pack();
>
> root.mainloop();
>
>
> This doesn't work, and for any button I click, I only get "4" printed
> (which is the last value of variable 'i').
>
> Any idea about what is going on?
>
> Thanks a lot,
>
>     D?dac

I've never used a lambda.


from Tkinter import *


######################
# BEGIN: class Command
# Pass arguments to functions from button presses and menu  
selections! Nice!
# In your declaration:  ...command = Command(func, args,...)
# Also use in bind() statements
#     x.bind("<blah>", Command(func, args...))
class Command:
     def __init__(self, func, *args, **kw):
         self.func = func
         self.args = args
         self.kw = kw
     def __call__(self, *args, **kw):
         args = self.args+args
         kw.update(self.kw)
         apply(self.func, args, kw)
# END: class Command


root = Tk()


def cb(x):
     print x
     return


for i in range(5):
     b = Button(root, text=i, command = Command(cb, i))
     b.pack()

root.mainloop()


What were all of the extra semi-colons?

Bob


From mkieverpy at tlink.de  Fri Feb 16 17:37:42 2007
From: mkieverpy at tlink.de (mkieverpy at tlink.de)
Date: Fri, 16 Feb 2007 16:37:42 -0000
Subject: [Tkinter-discuss] Problems with lambda functions in callbacks
Message-ID: <20070216153813.E7D3CB8D5@mail.terralink.de>


Hello D?dac,

just to add an explanation, why your code doesn't work:

>from Tkinter import *
>
>root = Tk();
>
>def cb(x):
>    print x;
   
>for i in range(5):
>    b = Button(root,text=i,command=lambda:cb(i));

The part "lambda:cb(i)" is a function which gets evaluated
(called) when a button is clicked. It is evaluated
in the scope where it is defined. In this scope (the global scope)
the for-loop has finished running long ago.
Thus 'i' is always evaluated to '4' regardless which
button is pressed because this is the value of 'i'
after the end of the loop.

Stewart's code:
   b = Button(root,text=i,command=lambda i=i:cb(i));
This code works because it turns the loop variable 'i'
into a default value for the parameter 'i' of the lambda function.
And default values are evaluated when the function is defined,
i.e. while the loop is running.

>    b.pack();
>
>root.mainloop();

Hope this helps to demystify this behaviour,

Matthias Kievernagel
(mkiever/at/web/dot/de)

From busquets at silver.udg.es  Fri Feb 16 18:04:24 2007
From: busquets at silver.udg.es (=?UTF-8?B?RMOtZGFjIEJ1c3F1ZXRz?=)
Date: Fri, 16 Feb 2007 18:04:24 +0100
Subject: [Tkinter-discuss] Problems with lambda functions in callbacks
In-Reply-To: <20070216153813.E7D3CB8D5@mail.terralink.de>
References: <20070216153813.E7D3CB8D5@mail.terralink.de>
Message-ID: <45D5E418.7020802@eia.udg.es>

Hi,

Thank you all for you responses. With Stewart's answer I could get it 
working. Those were my first lines in python (that is why I had so many 
semi-colons - I'm so used to C and C++).

And also thanks for the explanation. One really needs to know how the 
programming language works when writing a program.

Cheers,

    D?dac

mkieverpy at tlink.de wrote:
> Hello D?dac,
>
> just to add an explanation, why your code doesn't work:
>
> >from Tkinter import *
>   
>> root = Tk();
>>
>> def cb(x):
>>    print x;
>>     
>    
>   
>> for i in range(5):
>>    b = Button(root,text=i,command=lambda:cb(i));
>>     
>
> The part "lambda:cb(i)" is a function which gets evaluated
> (called) when a button is clicked. It is evaluated
> in the scope where it is defined. In this scope (the global scope)
> the for-loop has finished running long ago.
> Thus 'i' is always evaluated to '4' regardless which
> button is pressed because this is the value of 'i'
> after the end of the loop.
>
> Stewart's code:
>    b = Button(root,text=i,command=lambda i=i:cb(i));
> This code works because it turns the loop variable 'i'
> into a default value for the parameter 'i' of the lambda function.
> And default values are evaluated when the function is defined,
> i.e. while the loop is running.
>
>   
>>    b.pack();
>>
>> root.mainloop();
>>     
>
> Hope this helps to demystify this behaviour,
>
> Matthias Kievernagel
> (mkiever/at/web/dot/de)
> _______________________________________________
> Tkinter-discuss mailing list
> Tkinter-discuss at python.org
> http://mail.python.org/mailman/listinfo/tkinter-discuss
>
>
>   

-- 
------------------------------------------------------------------------
*D?dac Busquets i Font*

Investigador Ram?n y Cajal
Universitat de Girona
Dept. d'Electr?nica, Inform?tica i Autom?tica
Institut d'Inform?tica i Aplicacions
Edifici P-IV, Despatx 128
Campus Montilivi
17071 Girona

Tel. (+34) 972.41.81.79
Fax. (+34) 972.41.80.98
e-mail: busquets at eia.udg.es
web: http://eia.udg.es/~busquets

------------------------------------------------------------------------
Abans d'imprimir aquest correu electr?nic pensa si ?s necessari fer-ho: 
el medi ambient ?s cosa de tots.

------------------------------------------------------------------------

From jstradli at nmt.edu  Fri Feb 16 17:56:26 2007
From: jstradli at nmt.edu (jstradli at nmt.edu)
Date: Fri, 16 Feb 2007 09:56:26 -0700 (MST)
Subject: [Tkinter-discuss] Installing Tk.framework to directory other than
	system directories
Message-ID: <52782.129.138.26.20.1171644986.squirrel@webmail.nmt.edu>

Hello,

Platform: Mac OS X 10.4

I'm trying to install the Tk.framework to a directory other than
/Library/Frameworks or /System/Library/Frameworks or ~/Library/Frameworks
.  I'm wanting to do this so I can create Mac packages with a custom build
of Python, Tkinter and some additional modules that can be installed in a
completely self contained custom directory.  I don't want Tk.framework to
be installed to the system directories because it may inadvertently
clobber a users Tk.framework ;-).

Here is what I have done
1) Built tcl with framework enabled and custom prefix.
   Then I changed the path the framework was to be
   installed to in the Makefile
   (namely /opt/<somename>/Library/Frameworks)

2) I then repeated the above for tk

3) I configured python with a custom prefix,
   then I edited setup.py and added to the
   beginning of the list variable "framework_dirs"
   the path to my tk and tcl frameworks
   (/opt/<somename>/Library/Frameworks)
   I than ran make and make install

After testing this I noticed that it was still linking to the
MAC OS default Tk.framework in /System/Library/Frameworks not
my newly installed framework?

Sorry for the long-windedness I wanted to make it clear what
I have done and my end goal.

Regards,
Joe



From sxn02 at yahoo.com  Tue Feb 20 00:23:29 2007
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Mon, 19 Feb 2007 15:23:29 -0800 (PST)
Subject: [Tkinter-discuss] Who maintains the Wiki?
Message-ID: <832310.68454.qm@web56011.mail.re3.yahoo.com>

Hi All,

I just noticed at the bottom of
http://tkinter.unpythonic.net/wiki/FrontPage
a collection of links that don't belong there.

Now, I know that there are porn-loving people, but I'm
one who thinks that it doesn't belong to this wiki.

Does anybody know how to contact the person(s) who
maintain this wiki?

Thanks,
Sorin


 
____________________________________________________________________________________
Don't pick lemons.
See all the new 2007 cars at Yahoo! Autos.
http://autos.yahoo.com/new_cars.html 

From Vasilis.Vlachoudis at cern.ch  Tue Feb 20 12:04:17 2007
From: Vasilis.Vlachoudis at cern.ch (Vasilis Vlachoudis)
Date: Tue, 20 Feb 2007 12:04:17 +0100
Subject: [Tkinter-discuss] Multipage Postscript printing from canvas
Message-ID: <2AACD4EB2F123248A064A23843B3A173020C21@cernxchg47.cern.ch>

Hi all,

 

In my application I am creating an editor using a scrollable canvas as
the main widget. I want to provide a print option for the canvas,
creating a multi-page A4/letter format postscript. I made the following
method to split the content of the canvas into many postscript files,
which will be later send to the printer or joined together to a single
file, but I have many problems.

1.	How do I create an A4 or letter format page?
2.	What is the conversion between pixels in the Canvas and points
in the postscript?
3.	What is the best way to split the pages?
4.	How do I merge everything into a multi-page postscript?

 

class InputCanvas(Canvas):

            ...

            def printer(self,filename):

                        bbox =
map(int,self.canvas.cget("scrollregion").split())

                        if bbox is None: return

                        (x,y,w,h) = bbox

                        height = 1000                # For the moment
arbitrarily chosen!

                        for y in range(0,h,height):

                                    self.canvas.postscript(

                                                file=filename+str(y),

                                                colormode="color",

                                                y=y)

                                                #pageheight=12*96)

 

 

Vasilis

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From mkieverpy at tlink.de  Tue Feb 20 15:05:15 2007
From: mkieverpy at tlink.de (mkieverpy at tlink.de)
Date: Tue, 20 Feb 2007 14:05:15 -0000
Subject: [Tkinter-discuss] Multipage Postscript printing from canvas
Message-ID: <20070220130500.0EDFFB825@mail.terralink.de>


Hello Vasilis,

the options to the postscript function are quite extensively
explained in the tk canvas man-page (man n canvas).
(Beware! I never used this :-)
What I have seen from a cursory glance:
 Use pagewidth or pageheight options for scaling to A4/Letter size
 Use x, y, height and width options to select a part of the canvas

Remember also: there is no size information in canvas coordinates.
  Scaling of the output is completely up to you.

(A4 is 20.99 x 29.70 (says gimp); so for the upper left part 
 of the canvas you might use:
 c.postscript(... pageheight="29.70c",x="0",y="0",height="297",width="209.9")

As I have said, I never used this, this is just what the man-page
says (just tried the line above).
It says also, that it generates encapsulated postscript,
so (with postscript hacking know-how) you could embed all generated
parts into a single postscript template file which just references the parts.
You might even do this in python, if you don't use the
file option.

Greetings,
Matthias Kievernagel
(mkiever/at/web/dot/de)

From gerardo at computo-industrial.com.mx  Tue Feb 20 17:41:38 2007
From: gerardo at computo-industrial.com.mx (Gerardo Juarez)
Date: Tue, 20 Feb 2007 11:41:38 -0500 (EST)
Subject: [Tkinter-discuss] Error in TopLevel Window
In-Reply-To: <20070220130500.0EDFFB825@mail.terralink.de>
Message-ID: <Pine.LNX.4.44.0702201117360.5704-100000@computo-industrial.com.mx>


Hi,

I am having a problem with one application that is proving very difficult
to pinpoint. The application downloads its own upgrades from a server and
notifies the user that this has been so with a Toplevel window, suggesting
to restart the application whenever possible to make changes effective.
Everything seems to be normal on Linux, but on Windows 9x, the very first
time after a reboot that this upgrade takes place, it is done
successfully, but the toplevel window opens blank with a large number as
its title (like "1127987922") -which has nothing to do with the title I am
using for it- and the application freezes. After killing and restarting
it, any further upgrades are uneventful, including the toplevel window
message. The problem occurs irrespective of what other applications are
running. I have received no reports of this problem on WinXP.

Do you know of any conditions under which something like could 
happen? Have you seen this behaviour before? 

Any guesses or speculations will be greatly appreciated...

Gerardo Juarez




From jepler at unpythonic.net  Tue Feb 20 18:16:04 2007
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 20 Feb 2007 11:16:04 -0600
Subject: [Tkinter-discuss] Who maintains the Wiki?
In-Reply-To: <832310.68454.qm@web56011.mail.re3.yahoo.com>
References: <832310.68454.qm@web56011.mail.re3.yahoo.com>
Message-ID: <20070220171602.GA25527@unpythonic.net>

I am responsible for the machine where the wiki resides, but it's
everyone's job to fix vandalism.  Don't complain, but log in and revert
the page.

Jeff

From mannslists at invigorated.org  Tue Feb 20 19:08:17 2007
From: mannslists at invigorated.org (Mannequin*)
Date: Tue, 20 Feb 2007 18:08:17 +0000
Subject: [Tkinter-discuss] Who maintains the Wiki?
In-Reply-To: <832310.68454.qm@web56011.mail.re3.yahoo.com>
References: <832310.68454.qm@web56011.mail.re3.yahoo.com>
Message-ID: <45DB3911.9030106@invigorated.org>

I accidentally sent this directly to Sorin... :P

Sorin Schwimmer wrote:
 > Hi All,
 >
 > I just noticed at the bottom of
 > http://tkinter.unpythonic.net/wiki/FrontPage
 > a collection of links that don't belong there.
 >
 > Now, I know that there are porn-loving people, but I'm
 > one who thinks that it doesn't belong to this wiki.
 >
 > Does anybody know how to contact the person(s) who
 > maintain this wiki?

I'm not a maintainer, but I'm in the process of removing the SPAM. The 
SPAMmer also hit the "WikiCourse/BasicIntroduction/091 Tips on the 
Editor", "PythonLanguage", and "WikiWikiWebb".

-M.


From rowen at cesmail.net  Tue Feb 20 20:36:27 2007
From: rowen at cesmail.net (Russell E. Owen)
Date: Tue, 20 Feb 2007 11:36:27 -0800
Subject: [Tkinter-discuss] Installing Tk.framework to directory other
	than system directories
References: <52782.129.138.26.20.1171644986.squirrel@webmail.nmt.edu>
Message-ID: <rowen-C72090.11362620022007@sea.gmane.org>

In article <52782.129.138.26.20.1171644986.squirrel at webmail.nmt.edu>,
 jstradli at nmt.edu wrote:

> Hello,
> 
> Platform: Mac OS X 10.4
> 
> I'm trying to install the Tk.framework to a directory other than
> /Library/Frameworks or /System/Library/Frameworks or ~/Library/Frameworks
> .  I'm wanting to do this so I can create Mac packages with a custom build
> of Python, Tkinter and some additional modules that can be installed in a
> completely self contained custom directory.  I don't want Tk.framework to
> be installed to the system directories because it may inadvertently
> clobber a users Tk.framework ;-).
> 
> Here is what I have done
> 1) Built tcl with framework enabled and custom prefix.
>    Then I changed the path the framework was to be
>    installed to in the Makefile
>    (namely /opt/<somename>/Library/Frameworks)
> 
> 2) I then repeated the above for tk
> 
> 3) I configured python with a custom prefix,
>    then I edited setup.py and added to the
>    beginning of the list variable "framework_dirs"
>    the path to my tk and tcl frameworks
>    (/opt/<somename>/Library/Frameworks)
>    I than ran make and make install
> 
> After testing this I noticed that it was still linking to the
> MAC OS default Tk.framework in /System/Library/Frameworks not
> my newly installed framework?
> 
> Sorry for the long-windedness I wanted to make it clear what
> I have done and my end goal.

Could you just use py2app to package your application? It handles all 
this for you. Your own special Python, Tcl and Tk will be included in 
the resulting application (making it rather large) and the user's own 
Python, Tcl and Tk will be ignored -- but just for that one application.

-- Russell