Does the TEXTBOX (edit control) have a 1024 maximum line length before it wraps?

[Terry Webb]

It appears that I may have bumped into a TEXTBOX control limitation.

I used DDT to create a multi-line, read-only TEXTBOX with both vertical and horizontal scroll bars. I load records from the data area of a DBF file for visual comparison. It works great as long as the record length is less than 1025 bytes; if the record is more than 1024 characters long it wraps to the next line.

So, is 1024 an EDIT control limit? Can I increase it?


------------------

[Borje Hagsten]

Seems to be the limit, yes. Don't know how to increase it, sorry.
Probably not possible, since it must have something to do with the
buffers it uses. Maybe a Rich edit control can handle this better?


------------------

[Fred Oxenby]

Is this a way to handle the situation?

EditWordBreakProc
The EditWordBreakProc function is an application-defined callback function used with the 
EM_SETWORDBREAKPROC message. A multiline edit control or a rich edit control calls an 
EditWordBreakProc function to break a line of text.
The EDITWORDBREAKPROC type defines a pointer to this callback function. 
EditWordBreakProc is a placeholder for the application-defined function name.

------------------
Fred
mailto:[email protected][email protected]</A>
http://www.oxenby.se

[Terry Webb]

Borje,

Hmmm. I haven't investigated RichEdit, I don't know if it has the same limit. Looks like I'll have to add some code to break the long records into smaller pieces--not what I want, but better than wrapped lines. Thanks for your thoughts.

Terry


------------------

[Terry Webb]

Fred,

A multiline edit control or a rich edit control calls an EditWordBreakProc function to break a line of text.

I'm not sure if that could be used to NOT break a line, or to increase the 1024 character limit. Thanks for the suggestion.

Terry


------------------

[Borje Hagsten]

Yes, Richedit seems to be the way to go. Following works:

'¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
' Template
'¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
#COMPILE EXE
#INCLUDE "WIN32API.INC"
%ID_TEXT     = 20
%ID_RICHEDIT = 30
 
'¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
' Create dialog and controls, etc
'¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
FUNCTION PBMAIN () AS LONG
  LOCAL hDlg AS LONG, hRichEd AS LONG, txt AS STRING
  txt = REPEAT$(1000, "OK ")              '<- 3000 byte line..
  hRichEd = LoadLibrary("RICHED32.DLL")
 
  DIALOG NEW 0, "Template",,, 200, 130, %WS_SYSMENU, 0 TO hDlg
  CONTROL ADD TEXTBOX, hDlg, %ID_TEXT, txt + $CRLF + "Textbox wraps long lines", _
                      4, 4, 188, 50, %WS_CHILD OR %ES_MULTILINE OR %ES_READONLY OR _
                       %WS_HSCROLL OR %ES_AUTOHSCROLL, %WS_EX_CLIENTEDGE
 
  CONTROL ADD "RichEdit", hDlg, %ID_RICHEDIT, txt + $CRLF + "Richedit don't", _
              4, 60, 188, 50, %WS_CHILD OR %WS_VISIBLE OR %ES_MULTILINE OR _
              %ES_READONLY OR %WS_HSCROLL OR %ES_AUTOHSCROLL, %WS_EX_CLIENTEDGE
 
  CONTROL SET FOCUS hDlg, %ID_RICHEDIT
  DIALOG SHOW MODAL hDlg
  FreeLibrary hRichEd
END FUNCTION

------------------

[Terry Webb]

Borje, that works, thanks!

------------------

[Terry Webb]

Just for the record: it appears that RichEdit (Windows 98) has a limit of 4095 characters before it wraps the line. For my purposes that's good enough.


------------------