Numeric Keyboard Layout

[Rich E]

Hi,

I found the NumericKeybardLayout() in the example script ui_widgets_composed_vkeyboard_numerical.py and it is really nice for a numbox widget I am making.  A couple questions now: 

Any reason it isn't included in vkeyboard.py?  I did see one thing I had to change, the big comma is only useful in making number strings, but I would think if you wanted that then you could just insert it into the label automatically with every three digits (or is this a European versus American thing? :)  I changed it to a decimal point in order to make floating point values.

The thing is that I would like to only allow number characters and discard all other input.  I tried doing this in my child class:

    def on_text_change(self, text):

        ''' Make sure text is only a valid number

            and assign it to our value.

        '''

        try:

            val = float(text)

        except ValueError:

            print('value error:', text)

            if text == '':

                self.value = 0

                self.label = str(0)

            else:

                self.label = self.value

        else:

            self.value = val

But the non-number characters are still staying in there.  Any suggestions on how to limit the text to numbers, and possibly - or .?

cheers,

Rich

[Mathieu Virbel]

It's just not yet included, an issue is already open for that :
http://code.google.com/p/pymt/issues/detail?id=256

It should be available as another layout like AZERTY / QUERTY / US
NUMERIC / FR NUMERIC...

And if you want to remove all other characters, you could do:
re.sub('[^0-9\.\-]*', '', your_text_var).

It's not enough to be really usable and cover all cases, but it's a start :)

Mathieu

2010/8/17 Rich E <reaki...@gmail.com>:

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[Rich E]

Thanks for the help,

On Wed, Aug 18, 2010 at 12:18 AM, Mathieu Virbel <txp...@gmail.com> wrote:

It's just not yet included, an issue is already open for that :
http://code.google.com/p/pymt/issues/detail?id=256

It should be available as another layout like AZERTY / QUERTY / US
NUMERIC / FR NUMERIC...

I put my star in :)  I suppose it is getting taken care of, as the example I found was only just added.

 

And if you want to remove all other characters, you could do:
re.sub('[^0-9\.\-]*', '', your_text_var).

Hm.. that does the trick, the same as try: float(var) along with a catch, and is probably more bug proof (and I still need to convert the result to a float). But, my problem is that I can't overwrite the label in MTTextInput (I have subclassed it in my MTNumBox class) when I find a non-digit character.  So, the next time on_text_change() gets fired, the old character is still in the handed text variable, once again needing to be removed.  This creates a problem with the backspace and arrow (not implemented yet) functionality.  

I tried just overwriting MTTextInput's label (I am a little confused about .label versus .value for this class) but it is storing the string somewhere else, then giving it back to me with non-digit characters again.  Do you know how I can overwrite this?

Rich

[Mathieu Virbel]

This should do the trick. However, a nicer fix is required for inclusion :)

---
from pymt import *
import re

m = MTTextInput()
m.old_value = ''
@m.event
def on_text_change(value):
try:
if value != '':
float(value)
m.old_value = value
except ValueError:
m.keyboard.text = m.value = m.old_value

runTouchApp(m)
---

2010/8/18 Rich E <rich....@gmail.com>: