From john at nmt.edu  Thu Dec  6 23:07:35 2012
From: john at nmt.edu (John W. Shipman)
Date: Thu, 6 Dec 2012 15:07:35 -0700 (MST)
Subject: [Tkinter-discuss] Still don't understand ttk styling
Message-ID: <alpine.LFD.2.00.1212061452230.3421@rainbow.nmt.edu>

I've read and reread everything I can find about ttk, both in
the Tcl docs and the Python 2.7 library docs, and I still have
no idea how styling really works.

Just to focus the discussion, here's a very simple task: change
the font that appears on the tabs in the ttk.Notebook widget.

The only way I found to do this is to change the root style's
default like this:

     s = ttk.Style()
     s.configure('.', font=('Helvetica', 16, 'bold'))

Is this the only way I can style the tab font?  If not, can
someone please explain how you figure out where Notebook
gets its font, and how to change it?

I've used all the methods of ttk.Style that one uses to explore
the structure of a theme: .theme_names(), .element_names(),
.element_options(), .lookup(), .configure(), and .layout().
All this tells me is that a Notebook has only one element,
named Notebook.client.

I understand that any option not configured in Notebook.client
falls back to the "client" theme element.  However, both those
elements have only two attributes, 'background' and
'borderdwidth'.  Nothing about a font attribute.

Most grateful for any help that you might provide, I remain,
John Shipman (john at nmt.edu), Applications Specialist
New Mexico Tech Computer Center, Speare 146, Socorro, NM 87801
(575) 835-5735, http://www.nmt.edu/~john
   ``Let's go outside and commiserate with nature.''  --Dave Farber

P.S.  I'm well along on the ttk rewrite of our locally written
Tkinter manual.  The rest of what's left looks pretty
straightforward, but I won't be happy with this version unless it
can help people answer simple questions like the one posed here.
The draft is here if you don't mind big chunks still missing:

     http://www.nmt.edu/tcc/help/pubs/tkinter85

Once it's done I'll move this version to the URL that is
referenced several places around the web, which currently holds
the 8.4, non-ttk version:

     http://www.nmt.edu/tcc/help/pubs/tkinter85

From klappnase at web.de  Fri Dec  7 14:14:17 2012
From: klappnase at web.de (Michael Lange)
Date: Fri, 7 Dec 2012 14:14:17 +0100
Subject: [Tkinter-discuss] Still don't understand ttk styling
In-Reply-To: <alpine.LFD.2.00.1212061452230.3421@rainbow.nmt.edu>
References: <alpine.LFD.2.00.1212061452230.3421@rainbow.nmt.edu>
Message-ID: <20121207141417.2d8c2c52.klappnase@web.de>

Hi John,

On Thu, 6 Dec 2012 15:07:35 -0700 (MST)
"John W. Shipman" <john at nmt.edu> wrote:

> I've read and reread everything I can find about ttk, both in
> the Tcl docs and the Python 2.7 library docs, and I still have
> no idea how styling really works.
> 
> Just to focus the discussion, here's a very simple task: change
> the font that appears on the tabs in the ttk.Notebook widget.
> 
> The only way I found to do this is to change the root style's
> default like this:
> 
>      s = ttk.Style()
>      s.configure('.', font=('Helvetica', 16, 'bold'))
> 
> Is this the only way I can style the tab font?  If not, can
> someone please explain how you figure out where Notebook
> gets its font, and how to change it?

I often find it hard to figure out thing like these, too. I think the best
source is usually reading the .tcl files where widget and style defaults
are defined.

As far as I understand, ttk as well as standard tk uses the
set of tk standard fonts by default, as returned by tkFont.names () ,
here:

('TkCaptionFont', 'font4143566764', 'TkSmallCaptionFont',
'TkTooltipFont', 'TkFixedFont', 'TkHeadingFont', 'TkMenuFont',
'TkIconFont', 'TkTextFont', 'TkDefaultFont')

I don't have the tk source code at hand, I would guess these are
hard-coded there, so that Text uses kTextFont and so on.

It looks like ttk overrides these defaults in ttk/fonts.tcl first,
then defines which font to use for styles in ttk/defaults.tcl , the
relevant snippet here looks like:

	ttk::style configure "." \
	    -borderwidth 	1 \
	    -background 	$colors(-frame) \
	    -foreground 	black \
	    -troughcolor 	$colors(-darker) \
	    -font 		TkDefaultFont \
	(...)

This may be overridden then by corresponding snippets in any theme
definition.

Now since there seems to be no font defined for notebook it
apparently uses TkDefaultFont, so one method to change it might be to
change TkDefaultFont with something like

   somewidget.tk.call('font', 'configure', 'TkDefaultFont', '-size', '28')

Of course this changes the font for every other widget that uses
TkDefaulFont either (which might be intentional when using themes otoh).

If only the font on the ttk notebook tabs should be changed, one has to
define a new font for the TNotebook.Tab resource, as in

    >>> s=ttk.Style()
    >>> s.configure('TNotebook.Tab')
    {'padding': '4 2', 'background': '#c3c3c3'}
    >>> s.configure('TNotebook.Tab', font=('courier', 18))
or
    >>> s.configure('TNotebook.Tab', font='TkTextFont')
    >>> s.configure('TNotebook.Tab')
    {'padding': '4 2', 'font': 'TkTextFont', 'background': '#c3c3c3'}

This works, I am not sure if this is documented anywhere, though.
This does also not seem to be coherent with other ttk widgets, in the ttk
combobox for example the Listbox subwidget seems to share its defaults
with any other listbox widget. Maybe this is because they consider the
notebook tabs as something special, while e.g. the combobox is composed
from "standard" widgets.

To query the default notebook tab font one can do:

    >>> s=ttk.Style()
    >>> s.configure('TNotebook.Tab')
    {'padding': '4 2', 'background': '#c3c3c3'}
    >>> s.lookup('TNotebook.Tab', 'font')
    'TkDefaultFont'
    >>> 

> I've used all the methods of ttk.Style that one uses to explore
> the structure of a theme: .theme_names(), .element_names(),
> .element_options(), .lookup(), .configure(), and .layout().
> All this tells me is that a Notebook has only one element,
> named Notebook.client.

I see, it looks somewhat like one just has to *know* about the
'TNotebook.Tab' style, which is anything but obvious when it is not
documented.


> P.S.  I'm well along on the ttk rewrite of our locally written
> Tkinter manual.  The rest of what's left looks pretty
> straightforward, but I won't be happy with this version unless it
> can help people answer simple questions like the one posed here.
> The draft is here if you don't mind big chunks still missing:
> 
>      http://www.nmt.edu/tcc/help/pubs/tkinter85
> 

Great work, I appreciate it really quite a lot!

Regards

Michael


.-.. .. ...- .   .-.. --- -. --.   .- -. -..   .--. .-. --- ... .--. . .-.

A princess should not be afraid -- not with a brave knight to protect her.
		-- McCoy, "Shore Leave", stardate 3025.3

From john at nmt.edu  Mon Dec 10 22:46:50 2012
From: john at nmt.edu (John W. Shipman)
Date: Mon, 10 Dec 2012 14:46:50 -0700 (MST)
Subject: [Tkinter-discuss] Tkinter 8.5 reference updated
Message-ID: <alpine.LFD.2.00.1212101444040.6125@rainbow.nmt.edu>

We are pleased to announce the completion of the rewrite of our
Tkinter quick reference guide for version 8.5:

     http://www.nmt.edu/tcc/help/pubs/tkinter

Improvements include:

     - Coverage of the ttk themed widgets.

     - A new section on setting up validation within Entry
       widgets.

We welcome any and all comments and suggestions.  Send them to:

     tcc-doc at nmt.edu

Best regards,
John Shipman (john at nmt.edu), Applications Specialist
New Mexico Tech Computer Center, Speare 146, Socorro, NM 87801
(575) 835-5735, http://www.nmt.edu/~john
   ``Let's go outside and commiserate with nature.''  --Dave Farber

From michael.odonnell at uam.es  Tue Dec 11 08:38:34 2012
From: michael.odonnell at uam.es (Michael O'Donnell)
Date: Tue, 11 Dec 2012 08:38:34 +0100
Subject: [Tkinter-discuss] Tkinter 8.5 reference updated
In-Reply-To: <alpine.LFD.2.00.1212101444040.6125@rainbow.nmt.edu>
References: <alpine.LFD.2.00.1212101444040.6125@rainbow.nmt.edu>
Message-ID: <CABaQFFFjaCwp95+j02QeqfxG5uAqMG4+a19Y9Kk7aLGi1D6VrQ@mail.gmail.com>

Thanks John,

   I have been using your older version as my main tkinter reference.
Happy to see an update for tk8.5!

Mick

On Mon, Dec 10, 2012 at 10:46 PM, John W. Shipman <john at nmt.edu> wrote:
>
> We are pleased to announce the completion of the rewrite of our
> Tkinter quick reference guide for version 8.5:
>
>     http://www.nmt.edu/tcc/help/pubs/tkinter
>
> Improvements include:
>
>     - Coverage of the ttk themed widgets.
>
>     - A new section on setting up validation within Entry
>       widgets.
>
> We welcome any and all comments and suggestions.  Send them to:
>
>     tcc-doc at nmt.edu
>
> Best regards,
> John Shipman (john at nmt.edu), Applications Specialist
> New Mexico Tech Computer Center, Speare 146, Socorro, NM 87801
> (575) 835-5735, http://www.nmt.edu/~john
>   ``Let's go outside and commiserate with nature.''  --Dave Farber
> _______________________________________________
> Tkinter-discuss mailing list
> Tkinter-discuss at python.org
> http://mail.python.org/mailman/listinfo/tkinter-discuss



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