Desaströse Performance von TRichedit

[Uwe Raabe]

Zitat von himitsu:

TextDateien ohne Formatierung ... warum überhaupt in ein RichEdit anstatt in ein Memo?

Na ja, weil:

Zitat von Maekkelrajter:

Aber einige optische Gimmicks wie mehrfarbiger Text sind eben mit einem TMemo nicht zu realisieren.

[himitsu]

Zitat von Uwe Raabe:

Zitat von himitsu:

TextDateien ohne Formatierung ... warum überhaupt in ein RichEdit anstatt in ein Memo?

Na ja, weil:

Zitat von Maekkelrajter:

Aber einige optische Gimmicks wie mehrfarbiger Text sind eben mit einem TMemo nicht zu realisieren.

ups.

SynEdit/SynMemo oder dergleichen?
oder das neue Direct2D-RichEdit ... müsste man doch bestimmt gut im FireMokey einbinden können.
(der Start von dem Geraffel dauert zwar ewig, aber danach scheint es schnell zu sein)

[Kas Ob.]

What about this

Delphi-Quellcode:

var
  Stream: TMemoryStream;
begin
  Stream := TMemoryStream.Create;
  try
    Stream.LoadFromFile(FILE_NAME);
    SendMessage(RichEdit1.Handle, WM_SETTEXT, LPARAM(0), WPARAM(Stream.Memory)); // better to add to the stream another byte with 0 or double bytes with 0, but for testing now
    //Stream.Position := 0;
    //RichEdit1.Lines.LoadFromStream(Stream);
  finally
    Stream.Free;
  end;
end;

[himitsu]

Zitat von Kas Ob.:

What about this

And this is supposed to work in a Delphi since 2009?

SendMessage = SendMessageW = Unicode
Is your file also Unicode?

[Kas Ob.]

Zitat von himitsu:

Zitat von Kas Ob.:

What about this

And this is supposed to work in a Delphi since 2009?

SendMessage = SendMessageW = Unicode
Is your file also Unicode?

It should !

Notice by sending the stream in full as it in the file, meaning the header included U+FEFF BOM header, yet the Window class recognized it, and handle it right, this even should work with Delphi 5.

But was it faster ?

[Uwe Raabe]

Zitat von himitsu:

Is your file also Unicode?

At least the example files posted above are.

Anyway, the TMemoryStream approach is quite similar to setting the Text or SelText with a string. It doesn't affect the performance, though.

[Kas Ob.]

Zitat von himitsu:

Zitat von Kas Ob.:

What about this

And this is supposed to work in a Delphi since 2009?

SendMessage = SendMessageW = Unicode
Is your file also Unicode?

Yes after re-reading more, i think WM_SETTEXT with Delphi 5 or may be even Delphi 7 might not work, as it will fail to handle the BOM marker for UTF16, as the used RichEdit class is version 1.0 and it is

Zitat:

ANSI (single-byte character set (SBCS) and multibyte character set (MBCS)) editing

So will work if the class changed to version 2.0, yet i might be wrong though, all in all this need more digging.