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From: JCO on 21 May 2010 15:25
I had to write a subclass for the CEdit control because I wanted it to
handle floating point numbers only. The code below is what I've done
however, it allows for multiple '.' (points). Therefore, 1...25 ends up
being valid. How can I ensure the decimal is only done one time? The issue
is that I validate each input but I can't validate the entire value to see
if the decimal was already used. Is the only way to do this ... to create a
local variable in this class so I can track the total amount? I have 30 of
these CEditNum (EditBox) in my application.

Code Below:
void CEditNum::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
//Allowed inputs are passed on to the base class
if( (nChar >= '0' && nChar <= '9') || nChar == '.' || nChar == VK_BACK )
{
CEdit::OnChar(nChar, nRepCnt, nFlags);
}
}

From: Seetharam on 21 May 2010 15:37
In your OnChar(), you can get the text previously entered by calling
GetWindowText().

-Seetharam
From: JCO on 21 May 2010 18:12
WOW!..
That was to easy. I will try to come up with a harder question next time.
Ha.
Thanks

"Seetharam" <smisro(a)gmail.com> wrote in message
news:b3cb6117-66d0-4bfd-91a9-b3ff5bca72d5(a)z17g2000vbd.googlegroups.com...
> In your OnChar(), you can get the text previously entered by calling
> GetWindowText().
>
> -Seetharam

From: David Lowndes on 21 May 2010 19:00
>I had to write a subclass for the CEdit control because I wanted it to
>handle floating point numbers only. The code below is what I've done
>however, it allows for multiple '.' (points).

Don't forget that some locale's use the comma rather than '.'

Dave
From: Joseph M. Newcomer on 22 May 2010 05:40
Use my control from my MVP Tips site! It already handles this.
joe

On Fri, 21 May 2010 14:25:27 -0500, "JCO" <someone(a)somewhere.com> wrote:

>I had to write a subclass for the CEdit control because I wanted it to
>handle floating point numbers only. The code below is what I've done
>however, it allows for multiple '.' (points). Therefore, 1...25 ends up
>being valid. How can I ensure the decimal is only done one time? The issue
>is that I validate each input but I can't validate the entire value to see
>if the decimal was already used. Is the only way to do this ... to create a
>local variable in this class so I can track the total amount? I have 30 of
>these CEditNum (EditBox) in my application.
>
>Code Below:
>void CEditNum::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
>{
> //Allowed inputs are passed on to the base class
> if( (nChar >= '0' && nChar <= '9') || nChar == '.' || nChar == VK_BACK )
> {
> CEdit::OnChar(nChar, nRepCnt, nFlags);
> }
>}
Joseph M. Newcomer [MVP]
email: newcomer(a)flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm
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