Disable image paste on richedit and VSCROLL

[AntoninoP]

Hello,
I created a program using TRichEdit and I have 2 question about it:
I see that if I have an image on the clipboard it will be pasted on the control... because my program allow to edit ini files, how I can disable it?
I would like to intercept EN_VSCROLL, is it possible?
Thanks,
Antonino

[Antonio Linares]

Antonino,

Could you please provide a small and self contained example PRG to test here ? thanks

[AntoninoP]

Hello,
now I can not test, but the first is a common problem:
https://social.msdn.microsoft.com/Forums/en-US/0f762cb8-7383-4937-8ee8-f8df5d3a9852/disable-image-paste-in-richtextbox

I am follow this sample https://www.codeproject.com/Articles/13581/Fast-HTML-syntax-highlighting-with-the-Rich-Edit-c and it highlight only the visible part intercepting the VScroll command.

[cnavarro]

Antonino, now I understand your first question

Please try

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//----------------------------------------------------------------------------//

METHOD Paste() CLASS TRichEdit5

   if GetClipContentFormat( 13, 1, 7, 15 ) > 0
   ::SendMsg( WM_PASTE )
   ::PostMsg( FM_CHANGE )
   endif

return nil

//----------------------------------------------------------------------------//

 

For second question, ( EN_VSCROLL ), please wait
I have tried to capture the message without success yet
https://msdn.microsoft.com/en-us/librar ... 89(v=vs.85).aspx

[AntoninoP]

The first problem looks ok, I already derived the TRichEdit so I added the Paste method.
The second problem looks like http://forums.fivetechsupport.com/viewtopic.php?f=3&t=34982&p=208642 because TDIalog:Command filter the commands... In this case microsoft should use WM_VSCROLL but we can not change the operation system

[cnavarro]

Antonino, for next version

New DATA

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   DATA   aFmtsClpPaste INIT {}
 

and Paste METHOD modified

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METHOD Paste() CLASS TRichEdit5

   local lSw   := .F.

   if !Empty( ::aFmtsClpPaste )
      if GetClipContentFormat( ::aFmtsClpPaste ) > 0
         lSw   := .T.
      endif
   else
      lSw   := .T.
   endif
   if lSw
      if ::CanPaste()
         ::SendMsg( WM_PASTE )
         ::PostMsg( FM_CHANGE )
      else
         MsgInfo( "Format Data in clipboard or ReadOnly Document", "Not Allowed Paste" )
      endif
   else
      MsgInfo( "Format Data in clipboard or ReadOnly Document", "Not Allowed Paste" )
   endif

return lSw
 

[cnavarro]

The second problem looks like http://forums.fivetechsupport.com/viewtopic.php?f=3&t=34982&p=208642 because TDIalog:Command filter the commands... In this case microsoft should use WM_VSCROLL but we can not change the operation system

I Know this, but I think that is not just the problem
Please wait

[AntoninoP]

In My Humble Opinion the WM_COMMAND management should be different, put on TWindow and/or TDialog something like:

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METHOD Command( nWParam, nLParam )
   local nNotifyCode, nID, hWndCtl, oCtrl
   nNotifyCode = nHiWord( nWParam )
   nID         = nLoWord( nWParam )
   hWndCtl     = nLParam
   do case
      case ::oPopup != nil
           ::oPopup:Command( nID )

      case hWndCtl == 0 .and. ::oMenu != nil .and. ;
            nNotifyCode == BN_CLICKED .and. nID != IDCANCEL
           ::oMenu:Command( nID )

      case (oCtrl := oWndFromHwnd( hWndCtl )) != nil .and. oCtrl:isKindOf("TCONTROL")
            oCtrl:Command( nWParam, nLParam )

   endcase
return nil

add an empty implementation on TControl, and move other case on respective classes, for example BN_CLICKED is only on button, CBN_SELCHANGE is only on ComboBox...

[Antonio Linares]

Antonino,

You are totally right

We are going to modify it, many thanks

[AntoninoP]

wow, this answer is unexpected
I glad to help

[Antonio Linares]

Antonino,

Maybe I answered you too fast

I am testing it and I am not sure that it may work properly...

Sometimes notifications are sent to the container of the control. In example, a BN_... notification is not sent to a button but to its container.

So it is the container the responsable for properly routing the message.