Re: Showing status of a long process

From:
DDD <1983ddd@gmail.com>
Newsgroups:
microsoft.public.vc.language
Date:
Fri, 21 Jan 2011 06:43:24 -0800 (PST)
Message-ID:
<919c664e-3793-4d0e-836e-31ea3c762fdc@r40g2000prh.googlegroups.com>
wang ha escrito:

On 21 Jan., 04:35, DDD <1983...@gmail.com> wrote:

There is one possible question. How do you arrange your "file
processing"?

While(...) {

processFile

showStatus

}

Is that so?

If so , the now phenomenon is right. Because the while loop will
occupy CPU until it out. And the main process
while (GetMessage(&msg, NULL, 0, 0))
        {
                if (!TranslateAccelerator(msg.hwnd, hAc=

celTable, &msg))

                {
                        TranslateMessage(&msg);
                        DispatchMessage(&msg);
                }
        }

can not dispatchMessage to WndProc function of the Dialog.

You can put your codes in a thread to achieve your destination.

Hi all gurus,
I've written a dialogue program in Visual C++ which processes many
files and might last long. I want to show the status of the process,
for example, "just processing the file abc.txt", on the GUI, where I
have put a static control with the variable m_strMsg for showing such
messages. During the processing the program changes m_strMsg if a new
file being processed is opened, and I haven't forgotten to write
"UpdateData(FALSE);" after changing m_strMsg. But the message on the
GUI does not change until the end of the program. What must be done t=

o

synchronize the GUI message and the process status? Or should I use
other architecture (for example, SDI) instead of dialogue program?
Many thanks in advance!

k.w.wang- Zitierten Text ausblenden -


- Zitierten Text anzeigen -


Yes, you are right. My code looks like:

while (there is file unprocessed) {
    process_the_next_file;
    showMsg;
}
I've read in "VC++ in 21 Days" about Multitasking. 4 kinds of
multitasking are introduced there: critical sections, mutexes,
semaphores und events. What kind of multitasking should be used for my
purpose? Thanks!


A simple solution is

void ThreadFunction()
{
process_the_next_file;
showMsg;
}

createThread(...ThreadFunction, ...);

k.w.wang

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