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**Robert Wallace** · 6 Nov 2007, 02:59 AM

or do I have to[*] Original RTF codes to set things up[*] Text[*] Text --- Append as necessary[*] End RTF codes[/list]then get the text and
Original RTF codes to set things up
Text --- Original now becomes original plus what I added?
End RTF codes

does any of this make sense?

Yes

You would not be able to add because the original text should be bracketed
{.....} and as far as I know anything added would be ignored.

However, I always do it the way you have shown above.
Bob

**Ronald Zutz** · 6 Nov 2007, 05:58 AM

So far, all examples given (including my own) use "Streamin" (which is basically pointers to the data to pass to how its shown, or I think), but its all like you have a complete document and just showing. (Like a file Open, format, show)

What I am wondering is if I can "append" to a file already shown? or if I have to get all the text, and then reformat with the RTF commands to properly show? (AKA..if using a RichEdit, to show, do you have to get text, reformat with the unseen RTF commands? and then repost with what you added?, or can you just append what you need to the "Text part" along with the unseen RTF commands?")

The streaming functions can be used with valid RTF from a string (whether it came from an RTF file, another richedit control, a database, or you built it yourself).

Code:

SUB rt_AppendTextRTF(BYVAL dwRT AS DWORD, zText AS STRING)

    LOCAL tStream AS EDITSTREAM

    rt_zText = zText
    rt_lPos = 1

    tStream.pfnCallback = CODEPTR(rt_StreamStringIn)

    SendMessage dwRT, %EM_STREAMIN, %SF_RTF OR %SFF_SELECTION, VARPTR(tStream)

END SUB

The above routine inserts RTF text at the current selection. If you have selected the end of the current richedit, the RTF text will be appended.

rt_zText is a global string variable to hold the RTF text being inserted. rt_lPos is a global long variable holding the current position of the transfer; set to 1 to begin.

Code:

FUNCTION rt_StreamStringIn(BYVAL dwCookie AS DWORD, BYVAL pbBuffer AS BYTE PTR, BYVAL lBufferLen AS LONG, BYREF lBytes AS LONG) AS LONG

    ' copy smaller of: remaining text or buffer length

    lBytes = MIN&(lBufferLen, LEN(rt_zText) - (rt_lPos - 1))

    ' if text to process,
    '    copy to richedit buffer from position in text
    '    set new text position

    IF lBytes > 0 THEN
        POKE$ pbBuffer, MID$(rt_zText, rt_lPos, lBytes)
        rt_lPos = rt_lPos + lBytes
    END IF

END FUNCTION

The above StreamIn callback copies the number of bytes in the richedit control buffer can accept (or remaining bytes to be inserting, if fewer). After copying from the current string position to the richedit buffer, it increments rt_lPos (current position in string) by the number of bytes copied.

May the stream be with you.

Ron

**Robert Wallace** · 6 Nov 2007, 07:48 AM

I stand corrected (I will now have to change my code)

Many thanks

Bob

**Dave Biggs** · 7 Nov 2007, 10:09 AM

You can add /replace text in a RichEdit control by pasting from the clipboard and also by using the EM_REPLACESEL message...
'

Code:

#Include "WIN32API.INC"
#Include "RICHEDIT.INC"
'------------------/Includes
 
Function REStreamInCB(ByVal dwCookie As Dword, ByVal pbBuff As Byte Ptr, _
                      ByVal cb As Long, ByRef pcb As Long) As Long
 Local psBuffer As String Ptr
  psBuffer = dwCookie                                                       ' **
  pcb = Min(Len(@psBuffer), cb) 
  If pcb > 0 Then
    Poke$ pbBuff, Left$(@psBuffer, pcb)
    @psBuffer = Mid$(@psBuffer, pcb + 1)
  End If
End Function
'------------------/RESTReamInCB
 
Function REStreamIn(ByVal hEd As Dword, ByVal sBuffer As String, ByVal StrmFmt As Long) As Long
 Local ES As EDITSTREAM
  ES.dwCookie    = VarPtr(sBuffer)                                          ' ** 
  ES.pfnCallback = CodePtr(REStreamInCB)
 
 Function = SendMessage(hEd, %EM_STREAMIN, StrmFmt, VarPtr(ES))             ' %SF_RTF / %SF_TEXT
End Function                                                                ' OR %SFF_SELECTION
'------------------/REStreamIn
 
CallBack Function DIALOGProc()
 Local RichText As String 
 Static RTFHeader As String
 
  Select Case CbMsg
    Case %WM_INITDIALOG
      Dialog Post CbHndl, %WM_USER + 1000, 0, 0
 
    Case %WM_USER + 1000, 0, 0                                              ' RTF header starts with
      RTFHeader = "{"+ _                                                    ' Opening brace
        "\rtf1\ansi\ansicpg1252\deff0\deflang1033"+ _                       ' Version and Char set
        "{\fonttbl"+ _                                                      ' Font table
        "{\f0\froman\fcharset0\fprq2\fttruetype Times New Roman;}"+ _
        "{\f1\fswiss\fcharset0\fprq2\fttruetype Arial;}"+ _
        "{\f2\fnil\fprq2\fcharset2 Wingdings;}}"+ _
        "{\colortbl"+ _                                                     ' Colour table
        "\red0\green0\blue0;"+ _                                            ' black  \cf0
        "\red255\green0\blue0;}"                                            ' red    \cf1
 
      RichText = _
        " Rather than streaming the contents in (eg from a file) - or pasting from the "+ _
        "clipboard - you can use ""CONTROL SET TEXT"" to fill a RichEdit control. \par "+ _
        "You can also use ""%EM_REPLACESEL"" to insert / append new text. \par\par "+ _
        "Set the insertion point or select text to be replaced and click either button below. "+ _
        "\fs24 \f2 \cf1 J"
 
      RichText = RTFHeader + RichText + "}"                                 ' NB Closing brace
      Control Set Text CbHndl, 101, RichText                                ' load marked up text
 
    Case %WM_NCACTIVATE
      Static hWndSaveFocus As Dword
      If Isfalse CbWparam Then
        hWndSaveFocus = GetFocus()
      Elseif hWndSaveFocus Then
        SetFocus(hWndSaveFocus)
        hWndSaveFocus = 0
      End If
 
    Case %WM_COMMAND
      Select Case As Long CbCtl
        Case 110
          If CbCtlMsg = %BN_CLICKED Then 
            'RichText = "{ 'Streamed In' }"
            RichText = RTFHeader + " \cf1 \f1  'Streamed In' " + "}"
            ' need RTHeader if changing font, colour etc - otherwise inserted text takes on
            ' character formatting of the insertion point / text being replaced.
            REStreamIn GetDlgItem(CbHndl, 101), RichText, %SF_RTF OR %SFF_SELECTION 
          End If
        Case 120
          If CbCtlMsg = %BN_CLICKED Then 
            RichText = RTFHeader + " \cf1 \f1  'EM_Replaced' " + "}"
            Control Send CbHndl, 101, %EM_REPLACESEL, 0, StrPtr(RichText)
          End If
      End Select
 
  End Select
End Function
'------------------/DialogProc
 
Function PbMain()
 Local lRslt As Long, hDlg As Dword 
 LoadLibrary("RICHED32.DLL")
 
  Dialog New 0, "RichEdit insert / replace test", , , 300, 220, %WS_SYSMENU, %WS_EX_TOPMOST To hDlg
  Control Add "RichEdit", hDlg, 101, "", 10, 10, 275, 110, _
    %WS_CHILD Or %WS_VISIBLE Or %ES_MULTILINE Or %ES_WANTRETURN Or _ 
    %WS_VSCROLL Or %ES_DISABLENOSCROLL, %WS_EX_RIGHTSCROLLBAR
  Control Add Button, hDlg, 110, "Stream In", 55, 175, 50, 15
  Control Add Button, hDlg, 120, "ReplaceSel", 145, 175, 50, 15
 
  Dialog Show Modal hDlg, Call DIALOGProc
 
End Function
'------------------/PbMain
'

**Cliff Nichols** · 7 Nov 2007, 06:43 PM

Dave when you mentioned

RichText = _
" Rather than streaming the contents in (eg from a file) - or pasting from the "+ _
"clipboard - you can use ""CONTROL SET TEXT"" to fill a RichEdit control. \par "+ _
"You can also use ""%EM_REPLACESEL"" to insert / append new text. \par\par "+ _
"Set the insertion point or select text to be replaced and click either button below. "+ _
"\fs24 \f2 \cf1 J"

Kinda fell into place the way I have been doing it the last year or 2 (never had time to research how it all works, but as long as it worked was good for me)

Now that I am back to correcting "Mistakes of my past" (stuff I did not learn beyond "Just make it work", or stuff I misunderstood, but it worked, and now I know I made mistakes)...

My 1st attempts (using Richedit) I first tried "CONTROL SET TEXT" and I will admit at some point "CONTROL SET TEXT" would show all the text formatted (including \line, \fs24 and etc, but not show as a linefeed, font = 24 sort of thing which I believe was just because I had a mistake somewhere)

I will have to go back and work up a test example, but I suspect my suspicions are true

Taken as text, all is either text or formatting commands, escapes sequences, or what have you, and only what you post it to will either understand to parse and format, or show as it truly is (its a string...whether its css, xml, rtf, some other format
Richedit understands these formatting commands and shows just the text
If I sent to notepad, it shows all the string (Formatting commands and all) because it was not built to parse the string
Streamin vs "Control Set Text" time differences really would only be due to using pointers vs strings (not sure I phrased that right, but you know what I meant)

Either way, if properly split apart, appended, edited etc, when its all put back together, it should show the same way (whether streamin, or "Control Set Text") just because "Behind the scenes" the richedit knows what to do with what you sent it.

Somewhere in the past, I posted some source code to speed things up if reading large files, strings etc...but for the sake of learning the basics of "WHY" it worked, I am back to basics and do not care about speed since in this case I am not doing much more than 1 sentence to 1 paragraph.

up to this point, I think I get the basics of RTF commands (Still learning I have some concepts to re-think) but at least a sandbox concept.

I guess the next "Baby Step" would be how to include a picture in the midst of it (forgive my example, but maybe someone would know what
I am trying)

Code:

<Rtf Formatting><Text><Picture><Text><end of Rtf formatting>

I am sure somewhere in the forums there are simple examples, but I just do not know enough terminology on this idea to even do a correct search without all the examples being streamin and text only. (although I can understand why)

**Dave Biggs** · 8 Nov 2007, 08:11 AM

Cliff,

I guess the next "Baby Step" would be how to include a picture in the midst of it...

Not such a baby step

, that will entail the use of OLE/COM interfacing.

Börje's 'AboutBox' and 'RichEdit with OLE' code samples on http://www.reonis.com/POFFS/ are about as 'simple' as you will find (but beware, even with those, Börje warns that dizziness and nausea might ensue from studying their inner workings :sick

.

Using a text editor to look at a WordPad file that has an embedded picture, shows that manual formatting of data to be inserted by code into a RichEdit control, probably isn't practical. The <Picture> is just too large a block of data to be manageable.

BTW. Shannon Larratt once made a pretty good fist of explaining the workings of RTF markup here.. http://www.bmeworld.com/shannon/basic/rtfhelp.html
- I've made a local copy of his web page (against the day that the link no longer works) as I refer to it often. It covers the basic character formatting, colour etc. that you need to quickly throw together some text for display in a RichEdit control.

More detail on version 1.0 is available from http://latex2rtf.sourceforge.net/RTF-Spec-1.0.txt and more recent specs here.. www.wotsit.org.

Good luck.

**Cliff Nichols** · 8 Nov 2007, 05:36 PM

Thank you Dave, your links help verify a thought I had in the past and worked on, but could not complete, (well partially complete), and had to give up due to other ideas that took precedence at the time, but I would like to go back and finish a concept I started.

The links show what I figured, was its not as simple as <img></img> sort of idea, but more on the "Break the img into binary or hex values and stream them in" sort of like some examples I see using DATA and a bunch of hex codes (but I may be off there cause I have not researched that either yet)

well off to research deeper and see if I will get dizzy? or if I can make sense of code I do not use often so I got a bit of a wall to climb

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