Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Designing a well behaved MFC dialog app

Posted on 2003-11-24
8
Medium Priority
?
254 Views
Last Modified: 2013-11-20
OK.  What am I doing wrong.  Why is it when I create an MFC app that is performing a process I cannot move the dialog box, repaint the screen when another app gets the focus and covers mine, or get the Cancel key to kill the app.  There must be some polling issue I'm missing and should implement.
0
Comment
Question by:johnsla
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
8 Comments
 
LVL 44

Accepted Solution

by:
Karl Heinz Kremer earned 252 total points
ID: 9814871
The article at http://www.codeguru.com/misc/lenop.html describes how to use create a multi-threaded application to solve your problem.
0
 
LVL 23

Assisted Solution

by:Roshan Davis
Roshan Davis earned 248 total points
ID: 9815750
If you are using a lengthy for loop, this will block windows messaging....So add this code in that loop

            MSG msg;

            while ( ::PeekMessage(&msg, NULL, NULL, NULL, PM_REMOVE) )
            {
                  ::TranslateMessage(&msg);
                  ::DispatchMessage(&msg);
            }

      The above code will process the message queue along with that heavy processing

Good Luck
0
 

Author Comment

by:johnsla
ID: 9819565
Nope.  Did not do the trick.  Regardless of where I put this code
0
 
LVL 44

Expert Comment

by:Karl Heinz Kremer
ID: 9820771
Assuming that the Peek/Translate/DispatchMessage construct does work, you have to put it inside your process, so that it gets executed every now and then (how often depends on how quickly the application should respond). So for example, if you are performing a lengthly calculation in a loop, you have to execute this code inside your processing loop:

while (!done)
{
   if (counter % 1000 == 0)
   {
      while (::PeekMessage((&msg, NULL, NULL, NULL, PM_REMOVE)
      {
         ::TranslateMessage(&msg);
         ::DispatchMessage(&msg);
      }
// do your calculation
...
   }
}

If this still does not work, take a look at the link that I posted earlier. The threaded approach should work regardless of what you do in your worker process.
0
 
LVL 44

Expert Comment

by:Karl Heinz Kremer
ID: 11848129
I provided at least part of the solution.
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Here is how to use MFC's automatic Radio Button handling in your dialog boxes and forms.  Beginner programmers usually start with a OnClick handler for each radio button and that's just not the right way to go.  MFC has a very cool system for handli…
Introduction: Hints for the grid button.  Nested classes, templated collections.  Squash that darned bug! Continuing from the sixth article about sudoku.   Open the project in visual studio. First we will finish with the SUD_SETVALUE messa…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Are you ready to place your question in front of subject-matter experts for more timely responses? With the release of Priority Question, Premium Members, Team Accounts and Qualified Experts can now identify the emergent level of their issue, signal…

604 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question