pythoncard-users

[Pythoncard-users] Text field widgets

[Liam C. <cy...@gm...>]

Kia ora, 

I'm playing around with text fields, and I'm trying to control what a
user can type.
So, I've used the following - 

    def on_TextField1_keyPress(self, event):
        print 'foo'

to test my theory. Now, I can press a key, and 'foo' will be printed
to my console all day long, but the text isn't entered in the text
field, so obviously I've overridden the default key press behaviour.

My problem is, I can't find  the default key press behaviour for a
text field widget.
I've looked in model.py, event.py, and widget.py, and if it's there,
I've missed it. (which is highly likely, I ran out of coffee
yesterday.)

Is anyone able to point me at the right module?

It would be much appreciated.

Regards, 

Liam Clarke
-- 
'There is only one basic human right, and that is to do as you damn well please.
And with it comes the only basic human duty, to take the consequences.

Re: [Pythoncard-users] Text field widgets

[Kevin A. <al...@se...>]

On Feb 26, 2005, at 4:45 AM, Liam Clarke wrote:

> Kia ora,
>
> I'm playing around with text fields, and I'm trying to control what a
> user can type.
> So, I've used the following -
>
>     def on_TextField1_keyPress(self, event):
>         print 'foo'
>
> to test my theory. Now, I can press a key, and 'foo' will be printed
> to my console all day long, but the text isn't entered in the text
> field, so obviously I've overridden the default key press behaviour.
>
> My problem is, I can't find  the default key press behaviour for a
> text field widget.
> I've looked in model.py, event.py, and widget.py, and if it's there,
> I've missed it. (which is highly likely, I ran out of coffee
> yesterday.)
>
> Is anyone able to point me at the right module?
>
> It would be much appreciated.
>
> Regards,
>
> Liam Clarke
> -- 
> 'There is only one basic human right, and that is to do as you damn 
> well please.
> And with it comes the only basic human duty, to take the consequences.
>

If you want the text to appear you need to add

event.skip()

on the line after your print statement. There are number of samples and 
tools that use keyDown, keyUp, and keyPress handlers, so you the 
findfiles tool to search for more examples that look at the keyCode...

ka

RE: [Pythoncard-users] Text field widgets

[Brian D. <deb...@ho...>]

Hi there,

I was working on my text length limited widget, also I worked on a text 
field that only accepts numbers, and this is my code, hope it helps.


def on_initialize(self, event):
        self.type = True

def on_txtText_keyPress(self, event):
        keyCode = event.keyCode
        if keyCode in range(48,58) or keyCode in 
[8,316,317,318,319,127,314,315]:
                event.Skip()

def on_txtText_keyPress(self, event):
        keyCode = event.keyCode
        if len(self.components.txtText.text) == 10:
            if keyCode in [8,316,317,318,319,127,314,315]:
                self.type = True
            else:
                self.type = False
        else:
            self.type = True
        if self.type:
            event.Skip()
        else:
            self.type = True


Any suggestions or ideas on how to optmize this code, specially the text 
leght validation, are more than welcome.

Regards,

Brian

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RE: [Pythoncard-users] Text field widgets

[Brian D. <deb...@ho...>]

Hi there,

I was working on my text length limited widget, also I worked on a text 
field that only accepts numbers, and this is my code, hope it helps.


def on_initialize(self, event):
        self.type = True

def on_txtText_keyPress(self, event):
        keyCode = event.keyCode
        if keyCode in range(48,58) or keyCode in 
[8,316,317,318,319,127,314,315]:
                event.Skip()

def on_txtText_keyPress(self, event):
        keyCode = event.keyCode
        if len(self.components.txtText.text) == 10:
            if keyCode in [8,316,317,318,319,127,314,315]:
                self.type = True
            else:
                self.type = False
        else:
            self.type = True
        if self.type:
            event.Skip()
        else:
            self.type = True


Any suggestions or ideas on how to optmize this code, specially the text 
leght validation, are more than welcome.

Regards,

Brian

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Re: [Pythoncard-users] Text field widgets

[Alex T. <al...@tw...>]

Brian Debuire wrote:

> Hi there,
>
> I was working on my text length limited widget, also I worked on a 
> text field that only accepts numbers, and this is my code, hope it helps.
>
>
> def on_initialize(self, event):
>        self.type = True

Unnecessary (at least in the code shown here) - every path through 
on_txtText_keyPress sets it before using it.
Is it used elsewhere ?

>
> def on_txtText_keyPress(self, event):
>        keyCode = event.keyCode
>        if len(self.components.txtText.text) == 10:
>            if keyCode in [8,316,317,318,319,127,314,315]:
>                self.type = True
>            else:
>                self.type = False
>        else:
>            self.type = True
>        if self.type:
>            event.Skip()
>        else:
>            self.type = True
>
>
> Any suggestions or ideas on how to optmize this code, specially the 
> text leght validation, are more than welcome.

I may be missing some subtlety - but why not simply

> def on_txtText_keyPress(self, event):
>        if len(self.components.txtText.text) < 10 or event.keyCode in 
> [8,316,317,318,319,127,314,315]:
>                event.Skip()

btw - I don't think this will be significantly more efficient - but I 
find it easier to read

-- 
Alex Tweedly       http://www.tweedly.net



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Re: [Pythoncard-users] Text field widgets

[Brian D. <deb...@ho...>]

Hi there,

Thanks Alex the code works fine and it really is easier to read.

But requesting more help how do I mix the text length and the numbers only 
validation???

Thanks in advance.

Brian

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Re: [Pythoncard-users] Text field widgets

[Alex T. <al...@tw...>]

Brian Debuire wrote:

> Hi there,
>
> Thanks Alex the code works fine and it really is easier to read.
>
> But requesting more help how do I mix the text length and the numbers 
> only validation???
>

def on_txtText_keyPress(self, event):
       if ( len(self.components.txtText.text) < 10 and event.keyCode in 
[45-58] )  or \
            event.keyCode in [8,316,317,318,319,127,314,315]:
               event.Skip()

Not quite so readable unfortunately.

-- 
Alex Tweedly       http://www.tweedly.net



-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.300 / Virus Database: 266.5.1 - Release Date: 27/02/2005

Re: [Pythoncard-users] Text field widgets

[Brian D. <deb...@ho...>]

Hi there,

Thanks Alex the code works fine and it really is easier to read.

But requesting more help how do I mix the text length and the numbers only 
validation???

Thanks in advance.

Brian

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

Re: [Pythoncard-users] Text field widgets

[Aaron H. <arc...@gm...>]

On Mon, 2005-02-28 at 14:25 +0000, Alex Tweedly wrote:
> > def on_txtText_keyPress(self, event):
> >        if len(self.components.txtText.text) < 10 or event.keyCode
> in=20
> > [8,316,317,318,319,127,314,315]:
> >                event.Skip()

Here's what I do:

1. create a class module to handle keypress tests
2. in it, define some lists and functions like this:

    __digit_keys__ =3D [48, 49, 50, 51, 52, 53, 54, 55, 56, 57,
wx.WXK_NUMPAD0, wx.WXK_NUMPAD1, wx.WXK_NUMPAD2, wx.WXK_NUMPAD3,
wx.WXK_NUMPAD4, wx.WXK_NUMPAD5, wx.WXK_NUMPAD6, wx.WXK_NUMPAD7,
wx.WXK_NUMPAD8, wx.WXK_NUMPAD9]

    __money_keys__ =3D [36, 44, 46]

    __ctrl_keys__ =3D [wx.WXK_NUMLOCK, wx.WXK_CAPITAL, wx.WXK_SCROLL]

    __nav_keys__ =3D [wx.WXK_DELETE, wx.WXK_BACK, wx.WXK_TAB,
wx.WXK_RETURN, wx.WXK_LEFT, wx.WXK_RIGHT]

    __date_keys__ =3D [wx.WXK_DIVIDE, wx.WXK_SUBTRACT, 45, 47]
    __zip_keys__ =3D [wx.WXK_SUBTRACT, 45]
    __phone_keys__ =3D [32, 40, 41, 45, 120, wx.WXK_SUBTRACT]

    __valid_date_keycodes__ =3D __digit_keys__ + __date_keys__ +
__ctrl_keys__
    __valid_money_keycodes__ =3D __digit_keys__ + __money_keys__ +
__ctrl_keys__
    __valid_zipcode_keycodes__ =3D __digit_keys__ + __zip_keys__ +
__ctrl_keys__
    __valid_phone_keycodes__ =3D __digit_keys__ + __phone_keys__ +
__ctrl_keys__
    __valid_integer_keycodes__ =3D __digit_keys__ + __ctrl_keys__

    def isNavKey(self, keyCode):
        """ Tells whether a key pressed was a navigational key (like
tab, delete, etc.) """
        return keyCode in self.__nav_keys__

    def validkey_date(self, keyCode):
        return self.isNavKey(keyCode) or keyCode in
self.__valid_date_keycodes__

    def validkey_zip(self, keyCode):
        return self.isNavKey(keyCode) or keyCode in
self.__valid_zipcode_keycodes__

    def validkey_money(self, keyCode):
        return self.isNavKey(keyCode) or keyCode in
self.__valid_money_keycodes__

    def validkey_phone(self, keyCode):
        return self.isNavKey(keyCode) or keyCode in
self.__valid_phone_keycodes__

    def validkey_integer(self, keyCode):
        return self.isNavKey(keyCode) or keyCode in
self.__valid_integer_keycodes__

3. in my app's init attribute/method:
   import keyCodeTests
   kct =3D keyCodeTests.keyCodeTests()

4. in keyPress events, something like this:

    def on_MyIntegerField_keyPress(self, event):
        if kct.isNavKey(event.keyCode) or (kct.validkey_integer
(event.keyCode) and len(event.target.text) <
self.__MyIntegerField_MAXLEN__):
            event.skip()

FWIW, you should probably set things like max acceptable field length,
max acceptable values, etc., for your fields in a config file and then
write code to read the config first thing (during init).  That way you
easily change stuff without having to re-write code.

Hope this helps.

-Aaron

Re: [Pythoncard-users] Text field widgets

[Liam C. <cy...@gm...>]

Sheesh. What I've come up with is this - 

store each textfield/area's restrictions on init - 

from Pythoncard import model
import re

def on_initialize(self, event):
    self.limits = {'text1':{'length':20, 'phone':True}} #complete for
each limited widget
    self.PhoneRE = re.compile('[0-9\(\)\-\\b]')



def on_keyPress(self, event):
      eventSource = event.target
       sourceClass = str(event.target.__class__) 
       if not (sourceClass.endswith(" Textfield>\' ") or
sourceClass.endswith(" Textarea>\' "):
             #Could just check hasattr('editable') and then if
editable is set to Treu
             event.skip()
             return
       length = self.limits[eventSource.name]['length']
       isPhoneNumber = self.limits[eventSource.name]['phone']
       if len(eventSource.text) < length or keyCode == 8 #(backspace):
              If isPhoneNumber:
                 if not self.PhoneRE.search(chr(event.keyCode)): return
              event.skip()
       return


This is rough code, but basically it checks the length to make sure
the new char won't exceed it, (unless it's backspace, I'll probably
have to check for enter/tab as well.)
And then it runs it through a RE if needed, in this case just a simple one
[0-9\(\)\-\\b]
which sould limit valid keystrokes to 
0123456789()- and backspace

Which should be enough to write a phone number. So, I just plan to
write a minimalist child window with this method and subclass whenever
I need to validate text.

That said, I was recently made aware of the fact that I have, in
effect, just re-invented the wheel, on account of wxPython's
validators. But, they look scary in the demo, so I'm happy.


But thanks for the info, I like the __nav_keys__ stuff.

Regards, 

Liam Clarke
On Mon, 28 Feb 2005 10:25:21 -0500, Aaron Howard <arc...@gm...> wrote:
> On Mon, 2005-02-28 at 14:25 +0000, Alex Tweedly wrote:
> > > def on_txtText_keyPress(self, event):
> > >        if len(self.components.txtText.text) < 10 or event.keyCode
> > in
> > > [8,316,317,318,319,127,314,315]:
> > >                event.Skip()
> 
> Here's what I do:
> 
> 1. create a class module to handle keypress tests
> 2. in it, define some lists and functions like this:
> 
>     __digit_keys__ = [48, 49, 50, 51, 52, 53, 54, 55, 56, 57,
> wx.WXK_NUMPAD0, wx.WXK_NUMPAD1, wx.WXK_NUMPAD2, wx.WXK_NUMPAD3,
> wx.WXK_NUMPAD4, wx.WXK_NUMPAD5, wx.WXK_NUMPAD6, wx.WXK_NUMPAD7,
> wx.WXK_NUMPAD8, wx.WXK_NUMPAD9]
> 
>     __money_keys__ = [36, 44, 46]
> 
>     __ctrl_keys__ = [wx.WXK_NUMLOCK, wx.WXK_CAPITAL, wx.WXK_SCROLL]
> 
>     __nav_keys__ = [wx.WXK_DELETE, wx.WXK_BACK, wx.WXK_TAB,
> wx.WXK_RETURN, wx.WXK_LEFT, wx.WXK_RIGHT]
> 
>     __date_keys__ = [wx.WXK_DIVIDE, wx.WXK_SUBTRACT, 45, 47]
>     __zip_keys__ = [wx.WXK_SUBTRACT, 45]
>     __phone_keys__ = [32, 40, 41, 45, 120, wx.WXK_SUBTRACT]
> 
>     __valid_date_keycodes__ = __digit_keys__ + __date_keys__ +
> __ctrl_keys__
>     __valid_money_keycodes__ = __digit_keys__ + __money_keys__ +
> __ctrl_keys__
>     __valid_zipcode_keycodes__ = __digit_keys__ + __zip_keys__ +
> __ctrl_keys__
>     __valid_phone_keycodes__ = __digit_keys__ + __phone_keys__ +
> __ctrl_keys__
>     __valid_integer_keycodes__ = __digit_keys__ + __ctrl_keys__
> 
>     def isNavKey(self, keyCode):
>         """ Tells whether a key pressed was a navigational key (like
> tab, delete, etc.) """
>         return keyCode in self.__nav_keys__
> 
>     def validkey_date(self, keyCode):
>         return self.isNavKey(keyCode) or keyCode in
> self.__valid_date_keycodes__
> 
>     def validkey_zip(self, keyCode):
>         return self.isNavKey(keyCode) or keyCode in
> self.__valid_zipcode_keycodes__
> 
>     def validkey_money(self, keyCode):
>         return self.isNavKey(keyCode) or keyCode in
> self.__valid_money_keycodes__
> 
>     def validkey_phone(self, keyCode):
>         return self.isNavKey(keyCode) or keyCode in
> self.__valid_phone_keycodes__
> 
>     def validkey_integer(self, keyCode):
>         return self.isNavKey(keyCode) or keyCode in
> self.__valid_integer_keycodes__
> 
> 3. in my app's init attribute/method:
>    import keyCodeTests
>    kct = keyCodeTests.keyCodeTests()
> 
> 4. in keyPress events, something like this:
> 
>     def on_MyIntegerField_keyPress(self, event):
>         if kct.isNavKey(event.keyCode) or (kct.validkey_integer
> (event.keyCode) and len(event.target.text) <
> self.__MyIntegerField_MAXLEN__):
>             event.skip()
> 
> FWIW, you should probably set things like max acceptable field length,
> max acceptable values, etc., for your fields in a config file and then
> write code to read the config first thing (during init).  That way you
> easily change stuff without having to re-write code.
> 
> Hope this helps.
> 
> -Aaron
> 
> 
> 


-- 
'There is only one basic human right, and that is to do as you damn well please.
And with it comes the only basic human duty, to take the consequences.