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CEdit Log Screen

Posted on 2001-07-17
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Last Modified: 2013-11-20
I would like to create a message log that displays error messages to a user during the execution of a program.  The following code will send an error message to a CEdit control (m_Messages) in red, blink the text, and then turn the text black:



                int nBegin, nEnd;

               m_TextColor = RGBRED;
          for (int i = 0; i< 2; i++)
          {
          int nBegin, nEnd;
          if ((nBegin=m_Messages.LineIndex(LineNumber)) != -1)
          {
                nEnd = nBegin + m_Messages.LineLength(LineNumber);
               m_Messages.SetSel(nBegin, nEnd);
               m_Messages.ReplaceSel(L"");

               m_Messages.UpdateWindow();
               Sleep(500);
               m_Messages.SetSel(nBegin, nEnd);
               m_ErrorMessages.ReplaceSel(L"Enter in Data");
               m_Messages.UpdateWindow();
               Sleep(500);

          }
          }
               m_Messages.SetSel(nBegin, nEnd);
               m_ErrorMessages.ReplaceSel(L"\r\n");
               m_TextColor = RGBBLACK;
               m_Messages.Invalidate();
          LineNumber++;

I was wondering if there was a way to only make the newly added text red and to keep the rest of the text black.  Also, I'm not sure how the Edit control will react when it reaches the last line of the control.  How can I test to see if the last line has been reached?


Thanks so much!
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Question by:cneaton
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8 Comments
 

Accepted Solution

by:
_ov earned 50 total points
ID: 6290087
You should use richedit instead. Simple edit-box is not supports the partially text decoration.

And you can use SetSel() method or something like this to set the cursor to the bottom of the editbox. Usually this method (SetSel) contains a flag like "bool bScroll" that tells the control to scroll the text to show the currently selected text.
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LVL 32

Assisted Solution

by:jhance
jhance earned 50 total points
ID: 6290274
What's with the Sleep(500) calls in your code??  You really DON'T want to do this in your Windows app.  During the 500 mS your thread is blocked and no other Windows messages can be processed.  That includes updating the controls in your window.
0
 

Author Comment

by:cneaton
ID: 6290355
I have to have sleep(500) in the code or the text will not appear to blink.  I tried to thread they system, but I only ran into more problems.
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Author Comment

by:cneaton
ID: 6290357
I have to have sleep(500) in the code or the text will not appear to blink.  I tried to thread the system, but I only ran into more problems.
0
 

Expert Comment

by:_ov
ID: 6292574
A correct way is to remove Sleep(500) and call SetTimer(hWnd, timerId, 500, NULL) (or like this);
Than, in WM_TIMER you should place KillTimer(hWnd, timerId);

If you need two pauses you can use a variable to count them.
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LVL 12

Expert Comment

by:migel
ID: 6292672
Hi!
IMHO you choose wrong control to this task.
look at www.codeguru.com misc. controls section for Logging window article.
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LVL 1

Expert Comment

by:Moondancer
ID: 6956539
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by:Roshan Davis
ID: 9490537
No comment has been added lately, so it's time to clean up this TA.
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Answered by : jhance, _ov (points to be split)

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