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Inserting Unicode chars in Entry widget

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  Inserting Unicode chars in Entry widget Alan Graham <alan.l.graham@gmail.com> - 2012-12-29 08:43 -0800
    Re: Inserting Unicode chars in Entry widget Chris Angelico <rosuav@gmail.com> - 2012-12-30 03:58 +1100
    Re: Inserting Unicode chars in Entry widget Irmen de Jong <irmen.NOSPAM@xs4all.nl> - 2012-12-29 18:11 +0100
      Re: Inserting Unicode chars in Entry widget Chris Angelico <rosuav@gmail.com> - 2012-12-30 04:23 +1100
        Re: Inserting Unicode chars in Entry widget Irmen de Jong <irmen.NOSPAM@xs4all.nl> - 2012-12-29 20:15 +0100

#35753 — Inserting Unicode chars in Entry widget

Hello Python experts,

I want to insert Unicode chars in an Entry widget by pushing on buttons;
one for each Unicode character I need. I have made the Unicode buttons.
I just need a simple function that will send the Unicode character to
the Entry widget.
Is there a better approach?

Alan

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#35755

On Sun, Dec 30, 2012 at 3:43 AM, Alan Graham <alan.l.graham@gmail.com> wrote:
> Hello Python experts,
>
> I want to insert Unicode chars in an Entry widget by pushing on buttons;
> one for each Unicode character I need. I have made the Unicode buttons.
> I just need a simple function that will send the Unicode character to
> the Entry widget.
> Is there a better approach?

What GUI toolkit are you using?

Whatever it is, there ought to be a simple method on the Entry widget
that inserts a character. Poke around with it and you'll probably find
it, though you may find it under a name you don't expect. (Happens a
lot. GTK calls something "sensitive" when the rest of the world calls
it "enabled".)

ChrisA

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#35758

On 29-12-2012 17:43, Alan Graham wrote:
> Hello Python experts,
> 
> I want to insert Unicode chars in an Entry widget by pushing on buttons;
> one for each Unicode character I need. I have made the Unicode buttons.
> I just need a simple function that will send the Unicode character to
> the Entry widget.
> Is there a better approach?
> 
> Alan
> 

Not sure what the question is. A better approach to doing what?

I assuming you're doing tkinter (it is helpful if you mention the toolkit when posting a
question). I'd create a function that you bind to all 'unicode buttons', and let the
function insert the correct character depending on which button triggered it.

A possible way to do that is to use a lambda with a different parameter for every
button, like this:

b1=Button(f, text='char1', command=lambda b=1: insert_char(b))
b2=Button(f, text='char2', command=lambda b=2: insert_char(b))
...etc..

def insert_char(b):
    if b==1:
        entrywidget.insert(0, u"\u20ac")   # inserts € in the entry widget e
    elif b==2:
        entrywidget.insert(0, ...some other char...)
    ...


Or simply define a different command function for every button, then you don't have to
use the lambda.

-irmen

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#35759

On Sun, Dec 30, 2012 at 4:11 AM, Irmen de Jong <irmen.NOSPAM@xs4all.nl> wrote:
> b1=Button(f, text='char1', command=lambda b=1: insert_char(b))
> b2=Button(f, text='char2', command=lambda b=2: insert_char(b))
> ...etc..
>
> def insert_char(b):
>     if b==1:
>         entrywidget.insert(0, u"\u20ac")   # inserts € in the entry widget e
>     elif b==2:
>         entrywidget.insert(0, ...some other char...)
>     ...

I'm not familiar with tkinter syntax, but why not:

b1=Button(f, text='char1', command=lambda: insert_char(1))
b2=Button(f, text='char2', command=lambda: insert_char(2))

or even:

b1=Button(f, text='char1', command=lambda: insert_char(u"\u20ac"))
b2=Button(f, text='char2', command=lambda: insert_char("... some other
char..."))

Seems weird to multiplex like that, but if there's a good reason for
it, sure. I'm more of a GTK person than tkinter, and more of a
command-line guy than either of the above.

ChrisA

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#35766

On 29-12-2012 18:23, Chris Angelico wrote:
> On Sun, Dec 30, 2012 at 4:11 AM, Irmen de Jong <irmen.NOSPAM@xs4all.nl> wrote:
>> b1=Button(f, text='char1', command=lambda b=1: insert_char(b))
>> b2=Button(f, text='char2', command=lambda b=2: insert_char(b))
>> ...etc..
>>
>> def insert_char(b):
>>     if b==1:
>>         entrywidget.insert(0, u"\u20ac")   # inserts € in the entry widget e
>>     elif b==2:
>>         entrywidget.insert(0, ...some other char...)
>>     ...
> 
> I'm not familiar with tkinter syntax, but why not:
> 
> b1=Button(f, text='char1', command=lambda: insert_char(1))
> b2=Button(f, text='char2', command=lambda: insert_char(2))
> 
> or even:
> 
> b1=Button(f, text='char1', command=lambda: insert_char(u"\u20ac"))
> b2=Button(f, text='char2', command=lambda: insert_char("... some other
> char..."))
> 
> Seems weird to multiplex like that, but if there's a good reason for
> it, sure. I'm more of a GTK person than tkinter, and more of a
> command-line guy than either of the above.
> 
> ChrisA
> 

You're right there's nothing special about tkinter there, I was copying some existing
code a bit too literally. Simplify the lambdas as needed. :)

Irmen

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