Re: edit box population in a dialog box

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On Wed, 20 Aug 2008 22:30:48 -0700 (PDT), "bwaichu@xxxxxxxxx" <bwaichu@xxxxxxxxx> wrote:

On Aug 20, 8:08 pm, Joseph M. Newcomer <newco...@xxxxxxxxxxxx> wrote:
Are you talking about assembly code?  Is there a meaningful purpose to this, or do you
just enjoy being miserable?

There is a cult about programming Windows in assembly code; it is precisely that, a cult.
Brainwashing is the only reason I've figured out that anyone would think that programming
in assembly code in 2008 could possibly make sense.

WM_COMMAND/EN_CHANGE tells you if the contents of an edit control have changed.  Whether
or not this change means it is "populated" is up to you.  WM_GETTEXT, strip leading and
trailing spaces, would be a good start.
                                        joe


Thanks. I got it to work. I still need to tweak the code some, but
it works. Here's my approach:

* wait for WM_COMMAND
* check for EN_CHANGE notification
* if EN_CHANGE notification, I check what caused it
* send a message to get the length (WM_GETTEXTLENGTH)
* if the length is greater or equal to one, I enable the button,
otherwise I disable it
****
So if I type a space, you enable the button, even though the contents may be nonsensical
because there is actually nothing there?
****

I have one problem though. Every time a change occurs to the edit
box, I check to
see the length of the item in the edit box. I wonder if there is a
more elegant way to
this.
*****
No. It is the only correct and possible way to do it. There is no need to look at the
control unless it tells you it changed.

I would use WM_GETTEXT and strip leading and trailing spaces off to make sure I had
content.
*****

Tweaking the bits was a challenge as well. I need to experiment with
some
better ways to test for EN_CHANGE.
*****
Have you considered writing in a modern language like C++/MFC? What, exactly, favors the
1950s model of programming?
joe
*****

Thanks again.
.

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