Re: Separate thread for updating virtual listview
On Mon, 1 Oct 2007 09:33:08 +0200, "Petter" <petter@nospam.nospam> wrote:
I have a CFormView based SDI application that can use a long time to collect
data that is shown in a virtual listview. Today the application is "frozen"
util all data is collected.
I think the solution can be to have a separate data-collection thread to
fill the list view gradually as data are collected, and it is important that
the data-collection thread can be terminated whenever I want (fo example if
the user switches to another form).
Is there a good example on how to do this the right way?
See:
http://members.cox.net/doug_web/threads.htm
Because you are using a virtual listview, you are storing the data in your
own data structure, perhaps a std::vector. Therefore, your data collection
thread won't be passing data to the primary thread. It might simply notify
the primary thread that new data is available with PostMessage, or the
primary thread might poll the data structure for new data on a regular
basis, say, once a second. I've found the latter to work well for file
searching operations. Either way, you will have to synchronize access to
the data structure while the collection is ongoing to ensure the threads
don't step on each other's toes.
--
Doug Harrison
Visual C++ MVP
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