Re: Validator support for text, integer and floating-point variants

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On Sunday, May 26, 2019 at 11:18:48 AM UTC-7, ABC wrote:
>
> https://docs.wxpython.org/wx.Validator.html
> mentions subclasses of text, integer and floating point validators, but I 
> get a "no attribute" error when I try to use them.
>

They excluded on purpose, IIRC because they rely on being able to have 
access to C++ types in other classes by address, which is not a good fit 
for the Python way of doing things, and especially when dealing with 
wrapped C++ classes. The main purpose for using the validators in that way 
is for data transfer from the widget to/from the value's storage place, not 
just for validation.

OTOH, implementing type-specific validators in Python is super easy and so 
having special classes for it is not a necessity. Check in the demo for a 
couple examples. 

--
Robin

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<div dir=3D"ltr">On Sunday, May 26, 2019 at 11:18:48 AM UTC-7, ABC wrote:<b=
lockquote class=3D"gmail_quote" style=3D"margin: 0;margin-left: 0.8ex;borde=
r-left: 1px #ccc solid;padding-left: 1ex;"><div dir=3D"ltr"><div><a href=3D=
"https://docs.wxpython.org/wx.Validator.html" target=3D"_blank" rel=3D"nofo=
llow" onmousedown=3D"this.href=3D&#39;https://www.google.com/url?q\x3dhttps=
%3A%2F%2Fdocs.wxpython.org%2Fwx.Validator.html\x26sa\x3dD\x26sntz\x3d1\x26u=
sg\x3dAFQjCNFVLU-gVkjAJyi5Zyf8fon7r3cHTg&#39;;return true;" onclick=3D"this=
.href=3D&#39;https://www.google.com/url?q\x3dhttps%3A%2F%2Fdocs.wxpython.or=
g%2Fwx.Validator.html\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNFVLU-gVkjAJyi=
5Zyf8fon7r3cHTg&#39;;return true;">https://docs.wxpython.org/wx.<wbr>Valida=
tor.html</a><br></div><div>mentions subclasses of text, integer and floatin=
g point validators, but I get a &quot;no attribute&quot; error when I try t=
o use them.</div></div></blockquote><div><br></div><div>They excluded on pu=
rpose, IIRC because they rely on being able to have access to C++ types in =
other classes by address, which is not a good fit for the Python way of doi=
ng things, and especially when dealing with wrapped C++ classes. The main p=
urpose for using the validators in that way is for data transfer from the w=
idget to/from the value&#39;s storage place, not just for validation.</div>=
<div><br></div><div>OTOH, implementing type-specific validators in Python i=
s super easy and so having special classes for it is not a necessity. Check=
 in the demo for a couple examples.=C2=A0</div><div><br></div><div>--</div>=
<div>Robin</div></div>

<p></p>

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