Solved

Refreshing the dialog's appearance

Posted on 2002-07-19
3
226 Views
Last Modified: 2013-11-20
I have a very standard dialog box.  The InitDialog posts a WM_USER +1 message before returning, the WM_USER +1 message is handled bya function that goes around in a loop, at the end of which CDialog::OnCancel is called to dispose the dialog box altogether.

During each cycle of the loop I want the dialog box to refresh its look (i.e. process WM_PAINT properly), I can't get this to happen, though.

Any suggestions?

0
Comment
Question by:trabar
[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
  • 2
3 Comments
 
LVL 8

Expert Comment

by:fl0yd
ID: 7166111
Think about what's happening here:
* the dialog is created and initialized
* WM_USER + 1 -msg is posted
* WM_USER + 1 -msg is handled in function fxn
* fxn runs in a loop before
* destroying the dialog
Even if you called InvalidateRect( NULL, FALSE ); and thus posted WM_PAINT-messages to the dialog message queue you are unable to handle them until fxn has returned. When it does, though, the dialog has already been destroyed.

You have two solutions: Either use multithreading which I would discourage in this case or redesign this awkward approach. Whenever something seems too complex it is probably wrong. Without knowing too much about this specific situation I would assume that your approach isn't exactly what I'd call feasable.
0
 
LVL 4

Accepted Solution

by:
mblat earned 100 total points
ID: 7166126
Or as an alternative you can try to force-process messages inside you loop.

put something like this here

while(bMyBeryLongLoop)
{
     MSG rMsg;
     while (::PeekMessage(&rMsg,0,0,0,PM_NOREMOVE)){
        AfxGetApp()->PumpMessage();
   
     // and do you stuff here....
  }
}

I don't really like this type of coding, but it works...
Hope it helps...
0
 
LVL 4

Expert Comment

by:mblat
ID: 7167192
Just wondering why did you grade this B?
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Introduction: Dynamic window placements and drawing on a form, simple usage of windows registry as a storage place for information. Continuing from the first article about sudoku.  There we have designed the application and put a lot of user int…
If you use Adobe Reader X it is possible you can't open OLE PDF documents in the standard. The reason is the 'save box mode' in adobe reader X. Many people think the protected Mode of adobe reader x is only to stop the write access. But this fe…
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.
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…

717 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