Question

How to color a specific word in a string and show it in a memo or a richtext?

Asked by: mis82

i have this

 string:= " jone:   how are you?"

i want to click a button to display that string like this

in memo or rich text:


jone: (in red)
how are you?(in blue)

thanks all

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Asked On
2004-05-14 at 02:07:49ID20989217
Tags

memo

,

word

Topic

Delphi Programming

Participating Experts
3
Points
250
Comments
13

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Answers

 

by: esoftbgPosted on 2004-05-14 at 02:14:33ID: 11066481

You can do that using TRichEdit

 

by: kretzschmarPosted on 2004-05-14 at 03:06:29ID: 11066684

a sample

procedure TForm1.Button3Click(Sender: TObject);
var s : String;
begin
  s := 'jone:   how are you?';
  richedit1.Lines.add(''); //new Line
  richedit1.SelStart := length(richedit1.Text); //to end of text
  richedit1.SelAttributes.Color := clred;
  richedit1.SelText := copy(s,1,pos(':',s));
  richedit1.SelStart := length(richedit1.Text); //to end of text
  richedit1.SelAttributes.Color := clblue;
  richedit1.SelText := copy(s,pos(':',s)+1,maxLongInt);
  richedit1.SelStart := length(richedit1.Text); //to end of text
  richedit1.selattributes := Richedit1.DefAttributes; //reset selAttributes
end;

meikl ;-)

 

by: esoftbgPosted on 2004-05-14 at 04:11:17ID: 11067037

procedure TForm1.Button1Click(Sender: TObject);
var
  P:      Integer;
  L:      Integer;
  S:      string;
  T:      string;
begin
  S := 'jone:   how are you?';
  T := Richedit1.Text;
  Richedit1.SelStart := 1;
  Richedit1.SelLength := Length(T);
  Richedit1.SelAttributes.Color := clblue;
  L := Length('jone:');
  P := Pos('jone:', T);
  while (P>0) do
  begin
    Richedit1.SelStart := P;
    Richedit1.SelLength := L;
    Richedit1.SelAttributes.Color := clRed;
    P := PosEx('jone:', T, P+5);
  end;
  Richedit1.SelLength := 0;
end;

 

by: esoftbgPosted on 2004-05-14 at 04:15:25ID: 11067067

ooops:
  while (P>0) do
  begin
    Richedit1.SelStart := P-1;
    //..............

 

by: esoftbgPosted on 2004-05-15 at 03:14:51ID: 11074719

procedure TForm1.Button1Click(Sender: TObject);
var
  P:      Integer;
  L:      Integer;
  S:      string;
  T:      string;
begin
  S := 'jone:';
  T := Richedit1.Text;
  Richedit1.SelStart := 1;
  Richedit1.SelLength := Length(T);
  Richedit1.SelAttributes.Color := clblue;
  L := Length(S);
  P := Pos(S, T);
  while (P>0) do
  begin
    Richedit1.SelStart := P-1;
    Richedit1.SelLength := L;
    Richedit1.SelAttributes.Color := clRed;
    P := PosEx(S, T, P+5);
  end;
  Richedit1.SelLength := 0;
end;

 

by: mnasmanPosted on 2004-05-16 at 03:26:39ID: 11080470

Hello
You can't do that using Memo, but you can do that using RichEdit, Read this article for implement that
Syntax Highlighting With RichEdit
http://www.thedelphimagazine.com/samples/1465/1465.htm

also there's free component which could highlight the text, it's support many languages keywords and you could build your own one
http://synedit.sourceforge.net/

 

by: esoftbgPosted on 2004-05-19 at 03:21:48ID: 11106540

aove example could be downloaded an application from
site:        http://www.geocities.com/esoftbg/
link:        Q_20992763.zip

 

by: esoftbgPosted on 2004-05-19 at 03:22:51ID: 11106542

excuse me,
link:        Q_20989217

 

by: esoftbgPosted on 2004-05-19 at 03:23:40ID: 11106547

unit Unit_Q_20989217;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ComCtrls, StrUtils;

type
  TForm1 = class(TForm)
    RichEdit1: TRichEdit;
    ButtonColor: TButton;
    ButtonBlack: TButton;
    procedure ButtonColorClick(Sender: TObject);
    procedure ButtonBlackClick(Sender: TObject);
  private   { Private declarations }
  public    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.ButtonColorClick(Sender: TObject);
var
  P:      Integer;
  L:      Integer;
  S:      string;
  T:      string;
begin
  S := 'jone:';
  T := RichEdit1.Text;
  RichEdit1.SelStart := 0;
  RichEdit1.SelLength := Length(T);
  RichEdit1.SelAttributes.Color := clblue;
  L := Length(S);
  P := Pos(S, T);
  while (P>0) do
  begin
    RichEdit1.SelStart := P-1;
    RichEdit1.SelLength := L;
    RichEdit1.SelAttributes.Color := clRed;
    P := PosEx(S, T, P+L);
  end;
  RichEdit1.SelLength := 0;
end;

procedure TForm1.ButtonBlackClick(Sender: TObject);
var
  T:      string;
begin
  T := RichEdit1.Text;
  RichEdit1.SelStart := 0;
  RichEdit1.SelLength := Length(T);
  RichEdit1.SelAttributes.Color := clBlack;
  RichEdit1.SelLength := 0;
end;

end.

 

by: esoftbgPosted on 2004-05-19 at 03:24:41ID: 11106550

object Form1: TForm1
  Left = 215
  Top = 114
  Width = 696
  Height = 480
  Caption = 'Q_20989217'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object RichEdit1: TRichEdit
    Left = 0
    Top = 38
    Width = 688
    Height = 408
    Align = alBottom
    Lines.Strings = (
     
        'jone: how are you? jone: how are you? jone: how are you? jone: h' +
        'ow are you?'
      'jone: how are you?'
      'jone: how are you?'
      'jone: how are you?')
    TabOrder = 0
  end
  object ButtonColor: TButton
    Left = 8
    Top = 8
    Width = 80
    Height = 25
    Caption = 'color'
    TabOrder = 1
    OnClick = ButtonColorClick
  end
  object ButtonBlack: TButton
    Left = 96
    Top = 8
    Width = 80
    Height = 25
    Caption = 'black'
    TabOrder = 2
    OnClick = ButtonBlackClick
  end
end

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