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rich edit text colors

Posted on 2000-03-06

Delphi

1 solution

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Last Modified: 2010-04-04

I wanted to have multiple colors on each line of my rich edit, how do i do this?

example.

'Hi there everyone!'
- I want 'Hi' to appear as blue and 'everyone' to appear in red.
How do i do this?

Comment

Question by:jchua

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8 Comments

LVL 10

Expert Comment

by:Lischke

ID: 25868012000-03-06

Select the text with:

RichEdit1.SelStart := 100;
RichEdit1.SelLenght := 100;

and then set the text attributes of the selected text like:

RichEdit1.SelAttributes.Color := clRed;

Ciao, Mike

LVL 2

Expert Comment

by:PeterLarsen

ID: 25868082000-03-06

I dont think it's possible to change the background color in TRichedit.
Take a look into the demos : "...borland\delphiX\demos\richedit".
Peter

Author Comment

by:jchua

ID: 25868652000-03-06

Lischke,

it doesnt seem to work, di u have any other suggestion?
thanks!

LVL 2

Expert Comment

by:PeterLarsen

ID: 25869252000-03-06

Mike's sample change the foreground color - and except from the spelling - it will change the foreground color.. :-)

"RichEdit1.SelLength := 100;"

Peter

LVL 10

Expert Comment

by:Lischke

ID: 25869562000-03-06

Peter,

yes, the forground color is changed with my code (despite the spelling error of "...Length"), but the question does not state about foreground or background colors. Just colors.

jchua,

WHAT does not work? Does the code start your browser or does the text line appear in green, although you specified red, or what else?

Ciao, Mike

LVL 27

Expert Comment

by:kretzschmar

ID: 25870042000-03-06

hi all,

an easy sample

procedure TForm1.Button1Click(Sender: TObject);
begin
richedit1.Selstart := 0;
Richedit1.SelAttributes.Color := clred;
Richedit1.SetSelTextBuf('Hi');
richedit1.Selstart := Length(Richedit1.Lines[0]);
Richedit1.SelAttributes.Color := clBlack;
Richedit1.SetSelTextBuf(' there ');
richedit1.Selstart := Length(Richedit1.Lines[0]);
Richedit1.SelAttributes.Color := clBlue;
Richedit1.SetSelTextBuf('everyone');

end;

meikl

LVL 27

Expert Comment

by:kretzschmar

ID: 25870412000-03-06

just the same sample
except the colororder is now correct and now using the seltext-property instead of the setseltextbuf-method

procedure TForm1.Button1Click(Sender: TObject);
begin
richedit1.Lines.Clear;
richedit1.Selstart := 0;
Richedit1.SelAttributes.Color := clBlue;
Richedit1.SelText := 'Hi';
richedit1.Selstart := Length(Richedit1.Text);
Richedit1.SelAttributes.Color := clBlack;
Richedit1.SelText := ' there ';
richedit1.Selstart := Length(Richedit1.Text);
Richedit1.SelAttributes.Color := clred;
Richedit1.SelText := 'everyone';
end;

meikl

LVL 1

Accepted Solution

by:halser

halser earned 50 total points

ID: 26759112000-04-01

The TRichEdit class in Delphi (D2 thru 5) implements a Richedit version 1 and this control does not support different background colors.

If you want to set the BACKGROUND color of the text in a richedit, you need at least a Richedit version 2 (the latest - version 3 - comes with W2K or Office2000). The DLL name of both - Richedit version 2 and version 3 is "Riched20.dll" and must be located in your \system directory.

That's the DLL part. Further you must implement the new functionality in Delphi. Luckily, there are already freeware implementations available.

Freeware implementation of Riched20.DLL (version 2): "Richedit98" from Alexander Obukhov. To download it, go to http://www.delphipages.com and search for "Richedit98".

Freeware implementation of Riched20.DLL (version 3): this is rather a tutorial by Robert Dunn. His home page is
http://home.att.net/~robertdunn/Yacs.html#RichEditPapers

Alex

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