RichEdit not scrolling without focus ?

[Ari Savola]

Hi folks,

I tried to search an answer for this, but without any luck, so if you could give me some tips with this, please.

I'm trying to use RichEdit box as an (optional) extra data display, which will receive text as the main program proceeds (kind of debug and/or log window). I selected RichEdit tech, because it seems to handle more text. The problem I have with this is, that I just can't get the RichEdit to scroll automatically to the last line without receiving focus first.

This version demoed here will scroll to the end after you click on it. Or set the focus there programmatically. Usage: click on "Show extra data window", after that click on "Generate some text" to fill it. The last line (no.50) should be visible without activating/focusing the RichEdit box.

What should I try?

 
#PBFORMS CREATED V1.51
#COMPILE EXE
#DIM ALL
#DEBUG ERROR ON
#TOOLS OFF
___________________________________________________________________________________________________
 
#PBFORMS BEGIN INCLUDES
#IF NOT %DEF(%WINAPI)
  #INCLUDE "WIN32API.INC"
#ENDIF
#IF NOT %DEF(%RICHEDIT_INC)
  #INCLUDE "RICHEDIT.INC"
#ENDIF
#INCLUDE "PBForms.INC"
#PBFORMS END INCLUDES
___________________________________________________________________________________________________
 
#PBFORMS BEGIN CONSTANTS
%IDD_dlgMAIN          =  101
%IDD_dlgEXTRADATA     =  102
%IDC_btnSHOWEXTRADATA = 4020
%IDC_redEXTRADATA     = 4300
%IDC_btnSUMTEXT       = 4301
#PBFORMS END CONSTANTS
___________________________________________________________________________________________________
 
DECLARE CALLBACK FUNCTION ShowMAINProc()
DECLARE FUNCTION ShowMAIN(BYVAL hParent AS DWORD) AS LONG
DECLARE CALLBACK FUNCTION ShowEXTRADATAProc()
DECLARE FUNCTION ShowEXTRADATA(BYVAL hDlg AS DWORD) AS LONG
#PBFORMS DECLARATIONS
DECLARE FUNCTION TEXTLOG(txt$) AS LONG
___________________________________________________________________________________________________
 
GLOBAL gMainHDLG, gExtraDataHDLG AS LONG
___________________________________________________________________________________________________
___________________________________________________________________________________________________
 
FUNCTION PBMAIN()
  PBFormsRichEdit ()      ' Load RichEdit
  ShowMAIN %HWND_DESKTOP
  PBFormsRichEdit (%TRUE) ' Unload RichEdit
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________
 
CALLBACK FUNCTION ShowMAINProc()
  LOCAL i AS LONG
  SELECT CASE AS LONG CB.MSG
    CASE %WM_INITDIALOG
      '-------------------------------------------------------------------
      '-------------------------------------------------------------------
    CASE %WM_DESTROY
      '-------------------------------------------------------------------
      IF ISTRUE(gExtraDataHDLG) THEN
        DIALOG SEND gExtraDataHDLG, %WM_SYSCOMMAND, %SC_CLOSE, 0
      END IF
      '-------------------------------------------------------------------
    CASE %WM_NCACTIVATE
      STATIC hWndSaveFocus AS DWORD
      '-------------------------------------------------------------------
      IF ISFALSE CB.WPARAM THEN
        ' Save control focus
        hWndSaveFocus = GetFocus()
      ELSEIF hWndSaveFocus THEN
        ' Restore control focus
        SetFocus(hWndSaveFocus)
        hWndSaveFocus = 0
      END IF
      '-------------------------------------------------------------------
    CASE %WM_COMMAND
      '-------------------------------------------------------------------
      SELECT CASE AS LONG CB.CTL
        CASE %IDC_btnSHOWEXTRADATA
          '---------------------------------------------------------------
          IF CB.CTLMSG = %BN_CLICKED OR CB.CTLMSG = 1 THEN
            IF gExtraDataHDLG=0 THEN
              CALL ShowEXTRADATA(CB.HNDL)
            END IF
          END IF
          '---------------------------------------------------------------
        CASE %IDC_btnSUMTEXT
          '---------------------------------------------------------------
          IF CB.CTLMSG = %BN_CLICKED OR CB.CTLMSG = 1 THEN
            IF ISTRUE(gExtraDataHDLG) THEN
              FOR i=1 TO 50
                TEXTLOG("The last line (and caret) should be visible without setting focus here " & FORMAT$(i) & $CRLF)
              NEXT
            END IF
          END IF
          '---------------------------------------------------------------
      END SELECT
      '-------------------------------------------------------------------
  END SELECT
END FUNCTION
___________________________________________________________________________________________________
 
FUNCTION ShowMAIN(BYVAL hParent AS DWORD) AS LONG
  LOCAL lRslt AS LONG
#PBFORMS BEGIN DIALOG %IDD_dlgMAIN->->
  LOCAL hDlg  AS DWORD
  DIALOG NEW hParent, "MainDialog", 58, 62, 211, 73, %WS_POPUP OR %WS_BORDER _
    OR %WS_DLGFRAME OR %WS_SYSMENU OR %WS_CLIPSIBLINGS OR %WS_VISIBLE OR _
    %DS_MODALFRAME OR %DS_3DLOOK OR %DS_NOFAILCREATE OR %DS_SETFONT, _
    %WS_EX_CONTROLPARENT OR %WS_EX_LEFT OR %WS_EX_LTRREADING OR _
    %WS_EX_RIGHTSCROLLBAR, TO hDlg
  CONTROL ADD BUTTON, hDlg, %IDC_btnSHOWEXTRADATA, "Show extra data window", _
    15, 25, 75, 25, %WS_CHILD OR %WS_VISIBLE OR %WS_TABSTOP OR %BS_TEXT OR _
    %BS_MULTILINE OR %BS_PUSHBUTTON OR %BS_CENTER OR %BS_VCENTER, _
    %WS_EX_LEFT OR %WS_EX_LTRREADING
  CONTROL ADD BUTTON, hDlg, %IDC_btnSUMTEXT, "Generate some text", 120, 25, _
    75, 25
#PBFORMS END DIALOG
  gMainHDLG = hDlg
  DIALOG SHOW MODAL hDlg, CALL ShowMAINProc TO lRslt
#PBFORMS BEGIN CLEANUP %IDD_dlgMAIN
#PBFORMS END CLEANUP
  FUNCTION = lRslt
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________
 
CALLBACK FUNCTION ShowEXTRADATAProc()
  STATIC gRTFtop, gRTFbottom, gRTFleft, gRTFright AS LONG
  LOCAL tmpDlgSizex, tmpDlgSizey, tmpsizex, tmpsizey AS LONG
  SELECT CASE AS LONG CB.MSG
    CASE %WM_INITDIALOG
      '-------------------------------------------------------------------
      DIALOG GET CLIENT CB.HNDL TO tmpDlgSizex, tmpDlgSizey
      ' ensin RTF boxi dialogin kokoiseksi
      CONTROL SET LOC CB.HNDL, %IDC_redEXTRADATA, 0,0
      CONTROL SET SIZE CB.HNDL, %IDC_redEXTRADATA, tmpDlgSizex, tmpDlgSizey
      ' richedit, levitys pystyyn ja vaakaan
      CONTROL GET LOC CB.HNDL, %IDC_redEXTRADATA TO gRTFleft, gRTFtop
      CONTROL GET SIZE CB.HNDL, %IDC_redEXTRADATA TO tmpsizex, tmpsizey
      gRTFright = tmpDlgSizex-gRTFleft-tmpsizex
      gRTFbottom = tmpDlgSizey-gRTFtop-tmpsizey
      '-------------------------------------------------------------------
    CASE %WM_SIZE
      '-------------------------------------------------------------
      IF CB.WPARAM <> %SIZE_MINIMIZED THEN
        DIALOG GET CLIENT CB.HNDL TO tmpDlgSizex, tmpDlgSizey
        CONTROL SET SIZE CB.HNDL, %IDC_redEXTRADATA, tmpDlgSizex-gRTFleft-gRTFright, tmpDlgSizey-gRTFtop-gRTFbottom
      END IF
      '-------------------------------------------------------------
    CASE %WM_DESTROY
      '-------------------------------------------------------------
      gExtraDataHDLG = 0
      '-------------------------------------------------------------
    CASE %WM_NCACTIVATE
      STATIC hWndSaveFocus AS DWORD
      '-------------------------------------------------------------
      IF ISFALSE CB.WPARAM THEN
        ' Save control focus
        hWndSaveFocus = GetFocus()
      ELSEIF hWndSaveFocus THEN
        ' Restore control focus
        SetFocus(hWndSaveFocus)
        hWndSaveFocus = 0
      END IF
      '-------------------------------------------------------------
    CASE %WM_COMMAND
      '-------------------------------------------------------------
      SELECT CASE AS LONG CB.CTL
        CASE %IDCANCEL
            DIALOG END CB.HNDL
            FUNCTION = 1
      END SELECT
      '-------------------------------------------------------------
  END SELECT
END FUNCTION
___________________________________________________________________________________________________
 
FUNCTION ShowEXTRADATA(BYVAL hParent AS DWORD) AS LONG
  LOCAL lRslt AS LONG
#PBFORMS BEGIN DIALOG %IDD_dlgEXTRADATA->->
  LOCAL hDlg  AS DWORD
  DIALOG NEW %HWND_DESKTOP, "Extra data", 53, 58, 325, 234, %WS_OVERLAPPED OR _
    %WS_THICKFRAME OR %WS_CAPTION OR %WS_SYSMENU OR %WS_VISIBLE OR _
    %DS_3DLOOK OR %DS_NOFAILCREATE OR %DS_SETFONT, %WS_EX_WINDOWEDGE OR _
    %WS_EX_LEFT OR %WS_EX_LTRREADING OR %WS_EX_RIGHTSCROLLBAR, TO hDlg
  CONTROL ADD PBFormsRichEdit(), hDlg, %IDC_redEXTRADATA, "", 0, 0, 325, 235, _
    %WS_CHILD OR %WS_VISIBLE OR %WS_TABSTOP OR %WS_HSCROLL OR %WS_VSCROLL OR _
    %ES_LEFT OR %ES_MULTILINE OR %ES_AUTOHSCROLL OR %ES_AUTOVSCROLL OR _
    %ES_READONLY OR %ES_SAVESEL OR %ES_NOOLEDRAGDROP, %WS_EX_CLIENTEDGE OR _
    %WS_EX_LEFT OR %WS_EX_LTRREADING OR %WS_EX_RIGHTSCROLLBAR
#PBFORMS END DIALOG
  gExtraDataHDLG = hDlg
  DIALOG SHOW MODELESS hDlg, CALL ShowEXTRADATAProc TO lRslt
#PBFORMS BEGIN CLEANUP %IDD_dlgEXTRADATA
#PBFORMS END CLEANUP
  FUNCTION = lRslt
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________
 
FUNCTION TEXTLOG(txt$) AS LONG
  IF ISTRUE(gExtraDataHDLG) THEN
    ' no selections (the first -1), go to the end (the second -1)
    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_SETSEL, -1, -1
    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_REPLACESEL, %FALSE, STRPTR(txt$)
    'CONTROL SET FOCUS gExtraDataHDLG,%IDC_redEXTRADATA
  END IF
END FUNCTION

Thank You.

cheers.. aSa C[_]

[Michael Mattias]

Debugging/logging message display? Automatically scrolls to "last" entry?

Use Listview control as a console. September 13 2003.

[Ari Savola]

As I'm a lazy and stupid "coder", I like the Textbox's/RichEdit's ability to allow easy transfer of variable sized data directly to the clipboard. Also other "built in" functionality that RichEdit has, might get handy (IF I learn how to use it effectively ).

Anyway your example seems a good starting point for a listview use, thank you. I'll have it saved for other times/purposes.

cheers.. aSa C[_]

[Dave Biggs]

This will insert new data at the top of the richedit box

 
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_SETSEL, 0, 0

[Michael Mattias]

As I'm a lazy and stupid "coder", I like the Textbox's/RichEdit's ability to allow easy transfer of variable sized data directly to the clipboard

I'm sure you or someone else can port this to store on the clipboard instead of in a disk file...

' ------------------------------------------------------------------
'              Save All entries in Listview control to a file
' HWnd          = Handle to listview control
' szFileName    = Where to saveText to be printed.
' returns:        0 = success else error
' to do?? Add startrow, endrow as parameters?
' note: listview_getItem cannot return "how much text" is there.. you have to allocate
' in this function anyway
' ------------------------------------------------------------------
FUNCTION SaveConsoleLogToFile (BYVAL hWnd AS LONG, szFile AS ASCIIZ ) AS LONG
  LOCAL hF AS LONG, nRow AS LONG, Z AS LONG


  LOCAL szText  AS ASCIIZ * 4096
  LOCAL w AS STRING
  LOCAL szProgramName AS ASCIIZ * %MAX_PATH, sPRogramName AS STRING

  ' get program name to put on report header
  GetModuleFileName  BYVAL %NULL, szProgramName, SIZEOF(szPRogramName)
  sPRogramName = MID$ (szProgramName, INSTR (-1, szPRogramName, "\") + 1)


  nRow= ListView_GetItemCount (hWnd)
  IF nRow > 0& THEN

      hF    = FREEFILE
      OPEN    szFile FOR OUTPUT AS hF
      IF ERR THEN
          FUNCTION = ERR
          EXIT FUNCTION
      END IF


      PRINT #hF, sProgramName  & SPACE$(12) & "CONSOLE LOG" & SPACE$(24) & DATE$ & " " & TIME$
      PRINT #hF,

      PRINT #hF, "Date and Time           Message"
      PRINT #hF, "------------------      -------------------------------------------------------"

      FOR Z = 0 TO nRow -1

          ' get col zero text, the date and time
          Listview_GetItemText hWnd, Z, 0, szText, SIZEOF(szText)
          w        = LSET$(szText, 24)
          PRINT #hF, w;
          ' get col 1, the message text
          Listview_GetItemText hWnd, Z, 1, szText, SIZEOF(szText)
          W        = szText
          PRINT #hF, W
      NEXT
      PRINT #hF,
      PRINT #hF, " *** END OF REPORT ***"
      CLOSE hF

   END IF     ' if there was any data to print

   FUNCTION = 0

END FUNCTION

MCM

[Cliff Nichols]

How about this???
(I know you wanted without losing focus, but this is so fast that I never notice it)

#PBFORMS CREATED V1.51
#COMPILE EXE
#DIM ALL
#DEBUG ERROR ON
#TOOLS OFF
___________________________________________________________________________________________________

#PBFORMS BEGIN INCLUDES
#IF NOT %DEF(%WINAPI)
  #INCLUDE "WIN32API.INC"
#ENDIF
#IF NOT %DEF(%RICHEDIT_INC)
  #INCLUDE "RICHEDIT.INC"
#ENDIF
#INCLUDE "PBForms.INC"
#PBFORMS END INCLUDES
___________________________________________________________________________________________________

#PBFORMS BEGIN CONSTANTS
%IDD_dlgMAIN          =  101
%IDD_dlgEXTRADATA     =  102
%IDC_btnSHOWEXTRADATA = 4020
%IDC_redEXTRADATA     = 4300
%IDC_btnSUMTEXT       = 4301
#PBFORMS END CONSTANTS
___________________________________________________________________________________________________

DECLARE CALLBACK FUNCTION ShowMAINProc()
DECLARE FUNCTION ShowMAIN(BYVAL hParent AS DWORD) AS LONG
DECLARE CALLBACK FUNCTION ShowEXTRADATAProc()
DECLARE FUNCTION ShowEXTRADATA(BYVAL hDlg AS DWORD) AS LONG
#PBFORMS DECLARATIONS
DECLARE FUNCTION TEXTLOG(txt$) AS LONG
___________________________________________________________________________________________________

GLOBAL gMainHDLG, gExtraDataHDLG AS LONG
GLOBAL hDlg  AS DWORD         '<--- Had to make global...but you were using globals anyways
___________________________________________________________________________________________________
___________________________________________________________________________________________________

FUNCTION PBMAIN()
  PBFormsRichEdit ()      ' Load RichEdit
  ShowMAIN %HWND_DESKTOP
  PBFormsRichEdit (%TRUE) ' Unload RichEdit
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________

CALLBACK FUNCTION ShowMAINProc()
  LOCAL i AS LONG
  SELECT CASE AS LONG CB.MSG
    CASE %WM_INITDIALOG
      '-------------------------------------------------------------------
      '-------------------------------------------------------------------
    CASE %WM_DESTROY
      '-------------------------------------------------------------------
      IF ISTRUE(gExtraDataHDLG) THEN
        DIALOG SEND gExtraDataHDLG, %WM_SYSCOMMAND, %SC_CLOSE, 0
      END IF
      '-------------------------------------------------------------------
    CASE %WM_NCACTIVATE
      STATIC hWndSaveFocus AS DWORD
      '-------------------------------------------------------------------
      IF ISFALSE CB.WPARAM THEN
        ' Save control focus
        hWndSaveFocus = GetFocus()
      ELSEIF hWndSaveFocus THEN
        ' Restore control focus
        SetFocus(hWndSaveFocus)
        hWndSaveFocus = 0
      END IF
      '-------------------------------------------------------------------
    CASE %WM_COMMAND
      '-------------------------------------------------------------------
      SELECT CASE AS LONG CB.CTL
        CASE %IDC_btnSHOWEXTRADATA
          '---------------------------------------------------------------
          IF CB.CTLMSG = %BN_CLICKED OR CB.CTLMSG = 1 THEN
            IF gExtraDataHDLG=0 THEN
              CALL ShowEXTRADATA(CB.HNDL)
            END IF
          END IF
          '---------------------------------------------------------------
        CASE %IDC_btnSUMTEXT
          '---------------------------------------------------------------
          IF CB.CTLMSG = %BN_CLICKED OR CB.CTLMSG = 1 THEN
            IF ISTRUE(gExtraDataHDLG) THEN
              FOR i=1 TO 50
                TEXTLOG("The last line (and caret) should be visible without setting focus here " & FORMAT$(i) & $CRLF)
              NEXT
            END IF
          END IF
          '---------------------------------------------------------------
'*** WORKS BETTER HERE!!!!!!!!!!!!!!
'*** Works
    SetFocus GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA)
    SetFocus hDlg
'*** Does not work
'     InvalidateRect GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA) , BYVAL %NULL, 0
'     UpdateWindow GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA)
      END SELECT
      '-------------------------------------------------------------------
  END SELECT
END FUNCTION
___________________________________________________________________________________________________

FUNCTION ShowMAIN(BYVAL hParent AS DWORD) AS LONG
  LOCAL lRslt AS LONG
#PBFORMS BEGIN DIALOG %IDD_dlgMAIN->->
  DIALOG NEW hParent, "MainDialog", 58, 62, 211, 73, %WS_POPUP OR %WS_BORDER _
    OR %WS_DLGFRAME OR %WS_SYSMENU OR %WS_CLIPSIBLINGS OR %WS_VISIBLE OR _
    %DS_MODALFRAME OR %DS_3DLOOK OR %DS_NOFAILCREATE OR %DS_SETFONT, _
    %WS_EX_CONTROLPARENT OR %WS_EX_LEFT OR %WS_EX_LTRREADING OR _
    %WS_EX_RIGHTSCROLLBAR, TO hDlg
  CONTROL ADD BUTTON, hDlg, %IDC_btnSHOWEXTRADATA, "Show extra data window", _
    15, 25, 75, 25, %WS_CHILD OR %WS_VISIBLE OR %WS_TABSTOP OR %BS_TEXT OR _
    %BS_MULTILINE OR %BS_PUSHBUTTON OR %BS_CENTER OR %BS_VCENTER, _
    %WS_EX_LEFT OR %WS_EX_LTRREADING
  CONTROL ADD BUTTON, hDlg, %IDC_btnSUMTEXT, "Generate some text", 120, 25, _
    75, 25
#PBFORMS END DIALOG
  gMainHDLG = hDlg
  DIALOG SHOW MODAL hDlg, CALL ShowMAINProc TO lRslt
#PBFORMS BEGIN CLEANUP %IDD_dlgMAIN
#PBFORMS END CLEANUP
  FUNCTION = lRslt
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________

CALLBACK FUNCTION ShowEXTRADATAProc()
  STATIC gRTFtop, gRTFbottom, gRTFleft, gRTFright AS LONG
  LOCAL tmpDlgSizex, tmpDlgSizey, tmpsizex, tmpsizey AS LONG
  SELECT CASE AS LONG CB.MSG
    CASE %WM_INITDIALOG
      '-------------------------------------------------------------------
      DIALOG GET CLIENT CB.HNDL TO tmpDlgSizex, tmpDlgSizey
      ' ensin RTF boxi dialogin kokoiseksi
      CONTROL SET LOC CB.HNDL, %IDC_redEXTRADATA, 0,0
      CONTROL SET SIZE CB.HNDL, %IDC_redEXTRADATA, tmpDlgSizex, tmpDlgSizey
      ' richedit, levitys pystyyn ja vaakaan
      CONTROL GET LOC CB.HNDL, %IDC_redEXTRADATA TO gRTFleft, gRTFtop
      CONTROL GET SIZE CB.HNDL, %IDC_redEXTRADATA TO tmpsizex, tmpsizey
      gRTFright = tmpDlgSizex-gRTFleft-tmpsizex
      gRTFbottom = tmpDlgSizey-gRTFtop-tmpsizey
      '-------------------------------------------------------------------
    CASE %WM_SIZE
      '-------------------------------------------------------------
      IF CB.WPARAM <> %SIZE_MINIMIZED THEN
        DIALOG GET CLIENT CB.HNDL TO tmpDlgSizex, tmpDlgSizey
        CONTROL SET SIZE CB.HNDL, %IDC_redEXTRADATA, tmpDlgSizex-gRTFleft-gRTFright, tmpDlgSizey-gRTFtop-gRTFbottom
      END IF
      '-------------------------------------------------------------
    CASE %WM_DESTROY
      '-------------------------------------------------------------
      gExtraDataHDLG = 0
      '-------------------------------------------------------------
    CASE %WM_NCACTIVATE
      STATIC hWndSaveFocus AS DWORD
      '-------------------------------------------------------------
      IF ISFALSE CB.WPARAM THEN
        ' Save control focus
        hWndSaveFocus = GetFocus()
      ELSEIF hWndSaveFocus THEN
        ' Restore control focus
        SetFocus(hWndSaveFocus)
        hWndSaveFocus = 0
      END IF
      '-------------------------------------------------------------


    CASE %WM_COMMAND
      '-------------------------------------------------------------
      SELECT CASE AS LONG CB.CTL
        CASE %IDCANCEL
            DIALOG END CB.HNDL
            FUNCTION = 1
      END SELECT
      '-------------------------------------------------------------
  END SELECT
END FUNCTION
___________________________________________________________________________________________________

FUNCTION ShowEXTRADATA(BYVAL hParent AS DWORD) AS LONG
  LOCAL lRslt AS LONG
#PBFORMS BEGIN DIALOG %IDD_dlgEXTRADATA->->
  LOCAL hDlg  AS DWORD
  DIALOG NEW %HWND_DESKTOP, "Extra data", 53, 58, 325, 234, %WS_OVERLAPPED OR _
    %WS_THICKFRAME OR %WS_CAPTION OR %WS_SYSMENU OR %WS_VISIBLE OR _
    %DS_3DLOOK OR %DS_NOFAILCREATE OR %DS_SETFONT, %WS_EX_WINDOWEDGE OR _
    %WS_EX_LEFT OR %WS_EX_LTRREADING OR %WS_EX_RIGHTSCROLLBAR, TO hDlg
  CONTROL ADD PBFormsRichEdit(), hDlg, %IDC_redEXTRADATA, "", 0, 0, 325, 235, _
    %WS_CHILD OR %WS_VISIBLE OR %WS_TABSTOP OR %WS_HSCROLL OR %WS_VSCROLL OR _
    %ES_LEFT OR %ES_MULTILINE OR %ES_AUTOHSCROLL OR %ES_AUTOVSCROLL OR _
    %ES_READONLY OR %ES_SAVESEL OR %ES_NOOLEDRAGDROP, %WS_EX_CLIENTEDGE OR _
    %WS_EX_LEFT OR %WS_EX_LTRREADING OR %WS_EX_RIGHTSCROLLBAR
#PBFORMS END DIALOG
  gExtraDataHDLG = hDlg
  DIALOG SHOW MODELESS hDlg, CALL ShowEXTRADATAProc TO lRslt
#PBFORMS BEGIN CLEANUP %IDD_dlgEXTRADATA
#PBFORMS END CLEANUP
  FUNCTION = lRslt
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________

FUNCTION TEXTLOG(txt$) AS LONG
  IF ISTRUE(gExtraDataHDLG) THEN
    ' no selections (the first -1), go to the end (the second -1)
    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_SETSEL, -1, -1
    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_REPLACESEL, %FALSE, STRPTR(txt$)
    'CONTROL SET FOCUS gExtraDataHDLG,%IDC_redEXTRADATA
     LOCAL TempText AS STRING
    CONTROL GET TEXT gExtraDataHDLG,%IDC_redEXTRADATA TO TempText
    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_SETSEL,LEN(TempText), LEN(TempText)
'*** Works better if in the callback proc
''*** Works
'    SetFocus GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA)
'    SetFocus hDlg
''*** Does not work
''     InvalidateRect GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA) , BYVAL %NULL, 0
''     UpdateWindow GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA)
  END IF
END FUNCTION

[Ari Savola]

Thank You, Cliff. You were the first really trying to solve this particular case. But I have to say, I AM interested to know the other ways too you have been pushing here. They won't stay unnoted.

I had some thoughts that this kind of focus trick could be one way *around* this, but postponed it, because I don't know how I could retain currently focused controls, except with a "last_focused" global : P (if you click repeatedly the generator button, you'll notice it will receive focus only every second press). In THIS example I could force that button to be focused every time, but in the real program there is no such a button to be focused.

I also have tried using forced scrolling features, but something went slightly wrong, as I wasn't very happy with the result.

Tried scrolling was something like these lines:

' retrieves either the line number of the current line (the line containing the caret)
' or, if there is a selection, the line number of the line containing the beginning of the selection
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_LINEFROMCHAR, -1, 0 TO x1
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_GETFIRSTVISIBLELINE, 0, 0 TO x2
x1 = x1-x2-5  ' why needs a 5 here? without it scrolls too much!
 
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%WM_SETREDRAW, 0, 0         '<- turn off redraw
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%EM_LINESCROLL, 0, x1       '<- scroll
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%EM_SETSEL, -1, -1          '<- set selection
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%WM_SETREDRAW, 1, 0         '<- turn on redraw

Or even:

 
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%EM_LINESCROLL, 0, 9999

If I could at least enquire somehow, what is the current visible line count in the RichEdit control..?? (note: resizable RichEdit => visible line count is not a constant)

cheers.. aSa C[_]

[Michael Mattias]

EM_SETSCROLLPOS Message
--------------------------------------------------------------------------------
An application sends an EM_SETSCROLLPOS message to tell the rich edit control to scroll to a particular point.

EM_SCROLL Message
--------------------------------------------------------------------------------
The EM_SCROLL message scrolls the text vertically in a multiline edit control. This message is equivalent to sending a WM_VSCROLL message to the edit control. You can send this message to either an edit control or a rich edit control.

MCM

[Cliff Nichols]

Maybe this will spark someone's mind (I can not think of it at the moment)

At some point in the past, I did have something (not sure if it was a work-around, or something real), that would on notification of loosing focus, and then before loosing focus, count the lines, and the current cursor position. That way you could put the cursor back where you wanted.

I will look around and see if I can find it (or even if I had the idea right, but went about it wrong), but maybe this sparks an idea for someone else :wavey:

[Michael Mattias]

You know, keyboard focus is not really part of this problem... the application shown is modifying the contents of a display control (the richedit) when a button is clicked.

The way I'd do that is

   When Button_clicked or other event 
        add/change delete text of display control 
        scroll control if desired to ensure latest data are visible 
        force repaint of scroll control 
   END WHEN

Call me old-fashioned but I like to believe tinkering with the keyboard focus is for ... tinkering with the keyboard interface.

[Ari Savola]

keyboard focus is not really part of this problem...

Probably very true. But "keyboard" focus (for the richedit control) produces the result I would like to see. I also tried dialog and control redraw for it, but it didn't help. Perhaps I didn't do it the right way?

The cursor position is in the end, but it just doesn't scroll down there without being focused (this is the problem).

Using "%EM_LINESCROLL,0,x" works somewhat, but I need to figure out what is the current (not constant) visible line count of the richedit control to make it nice. Also it scrolled too many lines which I had to compensate (-5 to make the caret stay at the same line. Where does that come from?).

"%EM_SCROLLCARET,0,0" didn't work, probably I just don't know how to use it correctly. Or is this just for horizontal scrolling ?

cheers.. aSa C[_]

[Michael Mattias]

Changing the focus "works" because when you gain the focus Windows does other stuff automatically if needed... the stuff you DIDN'T do when you added the text.

CONTROL/DIALOG REDRAW DID work... it redrew the control. What it doesn't do is what you should have done ... moved the scroll position.

MCM

[Cliff Nichols]

MCM has a point (if I got it right)

#PBFORMS CREATED V1.51
#COMPILE EXE
#DIM ALL
#DEBUG ERROR ON
#TOOLS OFF
___________________________________________________________________________________________________

#PBFORMS BEGIN INCLUDES
#IF NOT %DEF(%WINAPI)
  #INCLUDE "WIN32API.INC"
#ENDIF
#IF NOT %DEF(%RICHEDIT_INC)
  #INCLUDE "RICHEDIT.INC"
#ENDIF
#INCLUDE "PBForms.INC"
#PBFORMS END INCLUDES
___________________________________________________________________________________________________

#PBFORMS BEGIN CONSTANTS
%IDD_dlgMAIN          =  101
%IDD_dlgEXTRADATA     =  102
%IDC_btnSHOWEXTRADATA = 4020
%IDC_redEXTRADATA     = 4300
%IDC_btnSUMTEXT       = 4301
#PBFORMS END CONSTANTS
___________________________________________________________________________________________________

DECLARE CALLBACK FUNCTION ShowMAINProc()
DECLARE FUNCTION ShowMAIN(BYVAL hParent AS DWORD) AS LONG
DECLARE CALLBACK FUNCTION ShowEXTRADATAProc()
DECLARE FUNCTION ShowEXTRADATA(BYVAL hDlg AS DWORD) AS LONG
#PBFORMS DECLARATIONS
DECLARE FUNCTION TEXTLOG(txt$) AS LONG
___________________________________________________________________________________________________

GLOBAL gMainHDLG, gExtraDataHDLG AS LONG
GLOBAL hDlg  AS DWORD         '<--- Had to make global...but you were using globals anyways
___________________________________________________________________________________________________
___________________________________________________________________________________________________

FUNCTION PBMAIN()
  PBFormsRichEdit ()      ' Load RichEdit
  ShowMAIN %HWND_DESKTOP
  PBFormsRichEdit (%TRUE) ' Unload RichEdit
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________

CALLBACK FUNCTION ShowMAINProc()
  LOCAL i AS LONG
  SELECT CASE AS LONG CB.MSG
    CASE %WM_INITDIALOG
      '-------------------------------------------------------------------
      '-------------------------------------------------------------------
    CASE %WM_DESTROY
      '-------------------------------------------------------------------
      IF ISTRUE(gExtraDataHDLG) THEN
        DIALOG SEND gExtraDataHDLG, %WM_SYSCOMMAND, %SC_CLOSE, 0
      END IF
      '-------------------------------------------------------------------
    CASE %WM_NCACTIVATE
      STATIC hWndSaveFocus AS DWORD
      '-------------------------------------------------------------------
      IF ISFALSE CB.WPARAM THEN
        ' Save control focus
        hWndSaveFocus = GetFocus()
      ELSEIF hWndSaveFocus THEN
        ' Restore control focus
        SetFocus(hWndSaveFocus)
        hWndSaveFocus = 0
      END IF
      '-------------------------------------------------------------------
    CASE %WM_COMMAND
      '-------------------------------------------------------------------
      SELECT CASE AS LONG CB.CTL
        CASE %IDC_btnSHOWEXTRADATA
          '---------------------------------------------------------------
          IF CB.CTLMSG = %BN_CLICKED OR CB.CTLMSG = 1 THEN
            IF gExtraDataHDLG=0 THEN
              CALL ShowEXTRADATA(CB.HNDL)
            END IF
          END IF
          '---------------------------------------------------------------
        CASE %IDC_btnSUMTEXT
          '---------------------------------------------------------------
          IF CB.CTLMSG = %BN_CLICKED OR CB.CTLMSG = 1 THEN
            IF ISTRUE(gExtraDataHDLG) THEN
              FOR i=1 TO 50
                TEXTLOG("The last line (and caret) should be visible without setting focus here " & FORMAT$(i) & $CRLF)
              NEXT

'&&&&&& Added here just in case                        '<---MCM was right, either no set focus, or one passed for me CCN 9-15-08
     LOCAL TempText AS STRING
    CONTROL GET TEXT gExtraDataHDLG,%IDC_redEXTRADATA TO TempText
    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_SETSEL,LEN(TempText), LEN(TempText)
'&&&&&&&&& Yep it works !!!!

              
            END IF
          END IF
          '---------------------------------------------------------------
'*** WORKS BETTER HERE!!!!!!!!!!!!!!
'*** Works
    SetFocus GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA)
    SetFocus hDlg
'*** Does not work
'     InvalidateRect GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA) , BYVAL %NULL, 0
'     UpdateWindow GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA)
      END SELECT
      '-------------------------------------------------------------------
  END SELECT
END FUNCTION
___________________________________________________________________________________________________

FUNCTION ShowMAIN(BYVAL hParent AS DWORD) AS LONG
  LOCAL lRslt AS LONG
#PBFORMS BEGIN DIALOG %IDD_dlgMAIN->->
  DIALOG NEW hParent, "MainDialog", 58, 62, 211, 73, %WS_POPUP OR %WS_BORDER _
    OR %WS_DLGFRAME OR %WS_SYSMENU OR %WS_CLIPSIBLINGS OR %WS_VISIBLE OR _
    %DS_MODALFRAME OR %DS_3DLOOK OR %DS_NOFAILCREATE OR %DS_SETFONT, _
    %WS_EX_CONTROLPARENT OR %WS_EX_LEFT OR %WS_EX_LTRREADING OR _
    %WS_EX_RIGHTSCROLLBAR, TO hDlg
  CONTROL ADD BUTTON, hDlg, %IDC_btnSHOWEXTRADATA, "Show extra data window", _
    15, 25, 75, 25, %WS_CHILD OR %WS_VISIBLE OR %WS_TABSTOP OR %BS_TEXT OR _
    %BS_MULTILINE OR %BS_PUSHBUTTON OR %BS_CENTER OR %BS_VCENTER, _
    %WS_EX_LEFT OR %WS_EX_LTRREADING
  CONTROL ADD BUTTON, hDlg, %IDC_btnSUMTEXT, "Generate some text", 120, 25, _
    75, 25
#PBFORMS END DIALOG
  gMainHDLG = hDlg
  DIALOG SHOW MODAL hDlg, CALL ShowMAINProc TO lRslt
#PBFORMS BEGIN CLEANUP %IDD_dlgMAIN
#PBFORMS END CLEANUP
  FUNCTION = lRslt
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________

CALLBACK FUNCTION ShowEXTRADATAProc()
  STATIC gRTFtop, gRTFbottom, gRTFleft, gRTFright AS LONG
  LOCAL tmpDlgSizex, tmpDlgSizey, tmpsizex, tmpsizey AS LONG
  SELECT CASE AS LONG CB.MSG
    CASE %WM_INITDIALOG
      '-------------------------------------------------------------------
      DIALOG GET CLIENT CB.HNDL TO tmpDlgSizex, tmpDlgSizey
      ' ensin RTF boxi dialogin kokoiseksi
      CONTROL SET LOC CB.HNDL, %IDC_redEXTRADATA, 0,0
      CONTROL SET SIZE CB.HNDL, %IDC_redEXTRADATA, tmpDlgSizex, tmpDlgSizey
      ' richedit, levitys pystyyn ja vaakaan
      CONTROL GET LOC CB.HNDL, %IDC_redEXTRADATA TO gRTFleft, gRTFtop
      CONTROL GET SIZE CB.HNDL, %IDC_redEXTRADATA TO tmpsizex, tmpsizey
      gRTFright = tmpDlgSizex-gRTFleft-tmpsizex
      gRTFbottom = tmpDlgSizey-gRTFtop-tmpsizey
      '-------------------------------------------------------------------
    CASE %WM_SIZE
      '-------------------------------------------------------------
      IF CB.WPARAM <> %SIZE_MINIMIZED THEN
        DIALOG GET CLIENT CB.HNDL TO tmpDlgSizex, tmpDlgSizey
        CONTROL SET SIZE CB.HNDL, %IDC_redEXTRADATA, tmpDlgSizex-gRTFleft-gRTFright, tmpDlgSizey-gRTFtop-gRTFbottom
      END IF
      '-------------------------------------------------------------
    CASE %WM_DESTROY
      '-------------------------------------------------------------
      gExtraDataHDLG = 0
      '-------------------------------------------------------------
    CASE %WM_NCACTIVATE
      STATIC hWndSaveFocus AS DWORD
      '-------------------------------------------------------------
      IF ISFALSE CB.WPARAM THEN
        ' Save control focus
        hWndSaveFocus = GetFocus()
      ELSEIF hWndSaveFocus THEN
        ' Restore control focus
        SetFocus(hWndSaveFocus)
        hWndSaveFocus = 0
      END IF
      '-------------------------------------------------------------


    CASE %WM_COMMAND
      '-------------------------------------------------------------
      SELECT CASE AS LONG CB.CTL
        CASE %IDCANCEL
            DIALOG END CB.HNDL
            FUNCTION = 1
      END SELECT
      '-------------------------------------------------------------
  END SELECT
END FUNCTION
___________________________________________________________________________________________________

FUNCTION ShowEXTRADATA(BYVAL hParent AS DWORD) AS LONG
  LOCAL lRslt AS LONG
#PBFORMS BEGIN DIALOG %IDD_dlgEXTRADATA->->
  LOCAL hDlg  AS DWORD
  DIALOG NEW %HWND_DESKTOP, "Extra data", 53, 58, 325, 234, %WS_OVERLAPPED OR _
    %WS_THICKFRAME OR %WS_CAPTION OR %WS_SYSMENU OR %WS_VISIBLE OR _
    %DS_3DLOOK OR %DS_NOFAILCREATE OR %DS_SETFONT, %WS_EX_WINDOWEDGE OR _
    %WS_EX_LEFT OR %WS_EX_LTRREADING OR %WS_EX_RIGHTSCROLLBAR, TO hDlg
  CONTROL ADD PBFormsRichEdit(), hDlg, %IDC_redEXTRADATA, "", 0, 0, 325, 235, _
    %WS_CHILD OR %WS_VISIBLE OR %WS_TABSTOP OR %WS_HSCROLL OR %WS_VSCROLL OR _
    %ES_LEFT OR %ES_MULTILINE OR %ES_AUTOHSCROLL OR %ES_AUTOVSCROLL OR _
    %ES_READONLY OR %ES_SAVESEL OR %ES_NOOLEDRAGDROP, %WS_EX_CLIENTEDGE OR _
    %WS_EX_LEFT OR %WS_EX_LTRREADING OR %WS_EX_RIGHTSCROLLBAR
#PBFORMS END DIALOG
  gExtraDataHDLG = hDlg
  DIALOG SHOW MODELESS hDlg, CALL ShowEXTRADATAProc TO lRslt
#PBFORMS BEGIN CLEANUP %IDD_dlgEXTRADATA
#PBFORMS END CLEANUP
  FUNCTION = lRslt
END FUNCTION
___________________________________________________________________________________________________
___________________________________________________________________________________________________

FUNCTION TEXTLOG(txt$) AS LONG
  IF ISTRUE(gExtraDataHDLG) THEN
    ' no selections (the first -1), go to the end (the second -1)
    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_SETSEL, -1, -1
    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_REPLACESEL, %FALSE, STRPTR(txt$)
'    'CONTROL SET FOCUS gExtraDataHDLG,%IDC_redEXTRADATA
'     LOCAL TempText AS STRING
'    CONTROL GET TEXT gExtraDataHDLG,%IDC_redEXTRADATA TO TempText
'    CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_SETSEL,LEN(TempText), LEN(TempText)
''*** Works better if in the callback proc
'''*** Works
''    SetFocus GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA)
''    SetFocus hDlg
'''*** Does not work
'''     InvalidateRect GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA) , BYVAL %NULL, 0
'''     UpdateWindow GetDlgItem(gExtraDataHDLG,%IDC_redEXTRADATA)
  END IF
END FUNCTION

(latest changes marked with &&&&&)

[Ari Savola]

Changing the focus "works" because when you gain the focus Windows does other stuff automatically if needed... the stuff you DIDN'T do when you added the text.

Yes, I understand this. I just don't know what the missing bit of code is and I'm trying to fish it here as I have noticed there's a lot of knowledge among the users here.

CONTROL/DIALOG REDRAW DID work... it redrew the control. What it doesn't do is what you should have done ... moved the scroll position.

Hmm.. I have managed to scroll "forcefully", but even that had something I didn't understand. Learning is a slow and painfull process for me..

I had something like this added when I tried:

 
LOCAL x1, x2 AS LONG
' retrieves either the line number of the current line (the line containing the caret)
' or, if there is a selection, the line number of the line containing the beginning of the selection
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_LINEFROMCHAR, -1, 0 to x1   'the caret is/should be already at the end and without a selection!
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA, %EM_GETFIRSTVISIBLELINE, 0, 0 to x2
x1 = x1-x2-5
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%WM_SETREDRAW, 0, 0         '<- turn off redraw
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%EM_LINESCROLL, 0, x1     '<- scroll
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%EM_SETSEL, -1, -1          '<- set selection
CONTROL SEND gExtraDataHDLG,%IDC_redEXTRADATA,%WM_SETREDRAW, 1, 0         '<- turn on redraw

The problems I had with this were:

1. if I wanted the cursor place/caret to stop at the last visible line in the richedit control, I would need to know how many lines there are currently. As I prefer resizable richedit, it will change..
2. where did that -5 come from ? Why do I need it to not to scroll over ? (if wanting to stop the cursor position at the same visible line as it were before scroll)

cheers.. aSa C[_]

[Michael Mattias]

I need to figure out what is the current (not constant) visible line count of the richedit control to make it nice.

Lots of tools to do this kind of thing....

EM_GETFIRSTVISIBLELINE
EM_GETLINECOUNT
EM_GETSCROLLPOS
EM_LINEFROMCHAR


>Learning is a slow and painfull process for me

It's slow for everyone at first; no pain = no gain!


MCM

[Ari Savola]

EM_GETFIRSTVISIBLELINE

Gets the zero-based index of the uppermost visible line.

EM_GETLINECOUNT

Retrieves the total number of text lines, not just the number of lines that are currently visible.

EM_GETSCROLLPOS

Gets the current scroll position.

EM_LINEFROMCHAR

Gets the index of the line that contains the specified character index.


I'm sorry for being so stupid again, maybe I'm doing too many things at once. How do I get the visible line COUNT with these ?

I guess I'm starting to bug you, as this seems quite impossible for me to do at the moment (without focus transfer). And I'm quite picky sometimes..

One last question: How it would be possible to get the control id of the currently focused control in a dialog? "DIALOG GET FOCUSEDCONTROL" or something with API would save me from another global


cheers.. aSa C[_]

[Michael Mattias]

Since you have found the descriptions and know these are window messages, you should be able to use them. Using messages is fundamental to Windows programming.

Unless of course, you are a refugee from some pointy-clicky-dragee-dropee-touchy-feely language product, in which case you probably never learned the fundamentals.

[Rodney Hicks]

Since you have found the descriptions and know these are window messages, you should be able to use them. Using messages is fundamental to Windows programming.

And fundamental to learning PB is searching the fora for the terms that you need. A search on any one of those terms will lead to examples, and other opportunities.
Don't be surprised to see a familiar name.

[Dave Biggs]

GetFocus(BYVAL %NULL) - handle of window that has keyboard focus.
Note.. %ID_Control=GetDlgCtrlID(GetFocus())


FYI: Sources of info..

POFFS offline search engine for PB Forums - download here: http://www.reonis.com/POFFS/index.htm

MSDN Library online: http://msdn2.microsoft.com/en-us/Library

Download Windows 32-bit API help file: http://www.powerbasic.com/files/pub/mstools/Win32.zip

(That's an old reference but still usable while your waiting for..
Microsoft Platform SDK CD (low cost) - order here: http://www.qmedia.ca/launch/psdk.htm
(Funky order form asks for a 10 digit phone number whatever your country! Use 123-456-7890 if you are not in the US )

[Ari Savola]

Since you have found the descriptions and know these are window messages, you should be able to use them. Using messages is fundamental to Windows programming.

As I'm not a Windows programmer.. (u'know there are still ppl alive who have never been educated with Windows stuff, real relics) I just try to make these little exercises to happen, for a learning process of mine. If I only had a personal teacher who would be always watching over my shoulders.. Btw. I have tried those messages, I didn't see any light there, yet. I think I might be missing something (maybe very fundamental?), but how would I know I feel sorry I dragged you all in to this little swamp of mine.

Unless of course, you are a refugee from some pointy-clicky-dragee-dropee-touchy-feely language product, in which case you probably never learned the fundamentals.

Exactly. Well not so much about "pointy-clicky.." as my bible in the past has been Ralf Brown's excellent list. You can call me an old Dos hacker Windows is not my bag.


Dave, thank you. I thought I had seen something like that somewhere.

cheers.. aSa C[_]