[PATCH 2/2] user32/listbox: Update the size in SetColumnWidth unconditionally

Gabriel Iv─âncescu gabrielopcode at gmail.com
Tue Aug 21 15:16:30 CDT 2018

Now I had some time to think about this (was tracking another bug ;)
)... I think if I go with this idea, I'll have to revamp the patch and
not check that within UpdateSize itself, since UpdatePage may have to
be called even if width & height don't change. To avoid calling
GetClientRect twice, I thought of factoring it like this:

First, take out the GetClientRect from UpdateSize (and add two
parameters to it, the width & height). Of course, at WM_SIZE do the
GetClientRect portion and pass that to UpdateSize, so it will be
identical to before (in behavior).

Second, in SetColumnWidth, use GetClientRect and check if width &
height changed at all; if they did, set the column_width and call
UpdateSize. If they did not, then check if column_width changed and
call UpdatePage (i.e. the original code's behavior).

Would that be better? Or am I overcomplicating it and the current
patch is fine here?

On Tue, Aug 21, 2018 at 5:09 PM, Gabriel Iv─âncescu
<gabrielopcode at gmail.com> wrote:
> Actually, I thought of something else: why not just add a check in
> LISTBOX_UpdateSize itself to see if width and height have changed at
> all? And if they haven't, just return early?
> This should alleviate any issues since in this case, calling
> UpdateSize from SetColumnWidth when the size itself hasn't changed
> shouldn't do a thing (it will return early from it and not invalidate
> anything).
> If that's ok, I will prepare a patch for that. (obviously, it will be
> a separate patch, this one is still valid in this case)

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