Re: How to preserve CListbox contents between dialogs

From:
"AliR \(VC++ MVP\)" <AliR@online.nospam>
Newsgroups:
microsoft.public.vc.mfc,microsoft.public.pocketpc.developer
Date:
Tue, 01 May 2007 15:24:16 GMT
Message-ID:
<AYIZh.2128$RX.917@newssvr11.news.prodigy.net>
I can't recommend a global listbox, because you will be chasing bugs
forever.
But I would recommend a virual list control. It fills in a second so you can
actually have 3 different list controls without the preformance hit.

Here are some examples: (both by the same guy)
http://www.codeproject.com/listctrl/virtuallist.asp
http://www.codeproject.com/listctrl/quicklist.asp

AliR.

"Henryk Birecki" <soaringpilot@sbcglobal.net> wrote in message
news:suke33hn6dt53ecdj0ma6shprv3vho5b82@4ax.com...

In my MFC based application that shares code between PC and PocketPC I
have three CListBox type objects that I want to be able to share
between different Dialogs that are invoked with DoModal at different
times. CListBox contents are pretty much static, but it takes a long
time (especially on older PocketPCs) to initialize them with
information. I wanted to Create global CListBox windows and then share
them between dialogs as needed. So in InitDialog I create listboxes
(WS_CHILD|LBS_NOTIFY...) if they are not windows yet and fill them
with their content. Otherwise I just set the dialog as their parent
with SetDialog. In the dialog OnDestroy I set listbox parent to NULL
so it is not destroyed with the dialog. This almost works. The problem
is that depending on what is happening between dialog invocations,
second time a dialog is opened message mapping between dialog and
listbox is lost so for instance ON_LBN_SELCHANGE(IDC_ListBox1,
OnSelchangeList) in the dialog code has no effect (dialog never
receives notification), and the listbox does not get re-painted
properly (no erase of background).

Can someone point me to proper way of preserving listbox contents
between dialog invocations? Using a long lived nonmodal dialog will
not work for me as I need different ones at different times.

Thanks in advance,

Henryk Birecki

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