Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.basic.visual.misc > #510

Re: RichEdit control question

Show all headers | View raw

|
| I'll explain what I have. I have a large .rtf document interspersed with
| thousands of hidden strings of the form "<####>" where #### is a number.
| I hid the strings by doing a regex search for "<\d+>" and inserting the
| \v....\v0 rtf tags around them.
|
| So when the document loads into the RichTextBox, the strings are all
| hidden.
|
| Sending the WinAPI message: SendMessageAny(hRTB, EM_SETCHARFORMAT,
| SCF_ALL, CF2) with dw.mask set to CFM_HIDDEN (and dw.effects not set),
| almost instantaneously un-hides them. I doubt that it does this by
| individually searching for and deleting the thousands of \v...\v0 tags,
| but somehow makes them ignored, globally.
|
| So the question is, what message to send to get the tags to be
| recognized again, thus re-hiding the strings?
|

  I think I understand. You want to toggle the same strings
and hope that they're still marked somehow? Like maybe \v
gets changed to something like \v- rather than being removed?
I don't know, but I'd guess that once the strings are unhidden
they can no longer be identified in terms of RTF markers. There
wouldn't be any reason to leave a residual marker that IDs them
as "once-hidden", and there would be no way to read it. (In other
words, you can use EM_GETCHARFORMAT to find out if something
is hidden, but there's no way to test whether it's "formerly hidden.")

   Assuming that, you'd just have to find and hide them all
again -- either by processing the RTF string or by searching via
EM_* calls. I imagine the instant functionality that unhides
them all at once is simply due to the remarkable internal
efficiency of a RichEdit. (I use a RichEdit to color-code text
in the form of HTML, VBScript, etc. With a tokenizing routine
I can add the requisite RTF tags to a 100 KB file in under 1/4
second, which allows me to update the display on a regular
basis, transparently, by actually rewriting the whole file. But
my 1/4 second timing only works because the RichEdit is so
incredibly fast. It loads and displays the updated RTF string
almost instantaneously.) 

Back to comp.lang.basic.visual.misc | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-10 14:41 -0700
  Re: RichEdit control question "Nobody" <nobody@nobody.com> - 2011-10-11 00:53 -0400
  Re: RichEdit control question BTIS Jeff <btisjb@gmail.com> - 2011-10-11 08:17 -0700
    Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-11 14:17 -0700
      Re: RichEdit control question "Mike Williams" <Mike@WhiskyAndCoke.com> - 2011-10-11 22:27 +0100
        Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-11 14:59 -0700
          Re: RichEdit control question "Mike Williams" <Mike@WhiskyAndCoke.com> - 2011-10-12 08:00 +0100
            Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-12 16:18 -0700
              Re: RichEdit control question Deanna Earley <dee.earley@icode.co.uk> - 2011-10-13 08:45 +0100
              Re: RichEdit control question "Mike Williams" <Mike@WhiskyAndCoke.com> - 2011-10-13 10:24 +0100
              Re: RichEdit control question "Mike Williams" <Mike@WhiskyAndCoke.com> - 2011-10-13 11:41 +0100
              Re: RichEdit control question "Mike Williams" <Mike@WhiskyAndCoke.com> - 2011-10-13 13:30 +0100
  Re: RichEdit control question Eric Coleman <eric@strategon.com> - 2011-10-13 19:55 -0500
    Re: RichEdit control question "Mike Williams" <Mike@WhiskyAndCoke.com> - 2011-10-14 09:30 +0100
    Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-15 07:53 -0700
      Re: RichEdit control question "Mike Williams" <Mike@WhiskyAndCoke.com> - 2011-10-15 17:03 +0100
      Re: RichEdit control question ralph <nt_consulting64@yahoo.net> - 2011-10-15 12:25 -0500
        Re: RichEdit control question ralph <nt_consulting64@yahoo.net> - 2011-10-15 12:29 -0500
        Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-15 12:45 -0700
          Re: RichEdit control question ralph <nt_consulting64@yahoo.net> - 2011-10-15 15:24 -0500
          Re: RichEdit control question "Thorsten Albers" <gudea@gmx.de> - 2011-10-15 23:16 +0000
            Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-16 18:21 -0700
              Re: RichEdit control question "Mayayana" <mayayana@invalid.nospam> - 2011-10-16 23:15 -0400
              Re: RichEdit control question "Mayayana" <mayayana@invalid.nospam> - 2011-10-17 17:19 -0400
                Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-17 15:59 -0700
                Re: RichEdit control question "Mayayana" <mayayana@invalid.nospam> - 2011-10-17 19:59 -0400
                Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-17 17:34 -0700
                Re: RichEdit control question "Mayayana" <mayayana@invalid.nospam> - 2011-10-17 23:46 -0400
                Re: RichEdit control question Kalkidas <eat@joes.pub> - 2011-10-18 07:35 -0700
                Re: RichEdit control question "Thorsten Albers" <gudea@gmx.de> - 2011-10-18 15:17 +0000
                Re: RichEdit control question "Mayayana" <mayayana@invalid.nospam> - 2011-10-19 10:09 -0400
                Re: RichEdit control question "Mike Williams" <Mike@WhiskyAndCoke.com> - 2011-10-19 18:26 +0100
          Re: RichEdit control question "Mayayana" <mayayana@invalid.nospam> - 2011-10-15 19:53 -0400
            Re: RichEdit control question "Thorsten Albers" <gudea@gmx.de> - 2011-10-16 03:32 +0000
              Re: RichEdit control question "Mayayana" <mayayana@invalid.nospam> - 2011-10-16 12:02 -0400
                Re: RichEdit control question "Thorsten Albers" <gudea@gmx.de> - 2011-10-16 22:10 +0000
                Re: RichEdit control question "Mayayana" <mayayana@invalid.nospam> - 2011-10-16 19:17 -0400
                Re: RichEdit control question "Thorsten Albers" <gudea@gmx.de> - 2011-10-17 09:43 +0000

csiph-web