Подсветить ссылки в TRichEdit

Материал из DRKB

Подсветить ссылки в TRichEdit[править | править код]

{ 
  So what we need: 
  1. drop on your form a RichEdit component from win32 page of component 
  palette 
  2. in OnCreate event of your form write the next code: 
}

procedure TForm1.FormCreate(Sender: TObject);
var
  mask: Word;
begin
  mask := SendMessage(Handle, EM_GETEVENTMASK, 0, 0);
  SendMessage(RichEdit1.Handle, EM_SETEVENTMASK, 0, mask or ENM_LINK);
  SendMessage(RichEdit1.Handle, EM_AUTOURLDETECT, Integer(True), 0);
  RichEdit1.Text := 'SwissDelphiCenter.com: '#13#10 +
    ' Site is located at www.SwissDelphiCenter.com';
end;

 { 
  After that your Richedit will convert automatically any URLs in highlighted 
  (blue color and underlined). Even if you'll start to enter any text directly 
  in Richedit, any begings for URL will be converted too (not only existing 
  text string but new too) 
}

// 3. now we must detect mouse clicks in URL range. For this task we must 
//    override WndProc method of our form: 
type
  TForm1 = class(TForm)
  protected
    procedure WndProc(var Message: TMessage); override;
  end;

// 4. the implementation looks like this: 

procedure TForm1.WndProc(var Message: TMessage);
var
  p: TENLink;
  strURL: string;
begin
  if (Message.Msg = WM_NOTIFY) then
  begin
    if (PNMHDR(Message.lParam).code = EN_LINK) then
    begin
      p := TENLink(Pointer(TWMNotify(Message).NMHdr)^);
      if (p.Msg = WM_LBUTTONDOWN) then
      begin
        SendMessage(RichEdit1.Handle, EM_EXSETSEL, 0, Longint(@(p.chrg)));
        strURL := RichEdit1.SelText;
        ShellExecute(Handle, 'open', PChar(strURL), 0, 0, SW_SHOWNORMAL);
      end
    end
  end;

  inherited;
end;

{ 
 5. Now you can compile your project (don't forget to include Richedit and 
 ShellAPI units in uses clause). 
}


Language: en
Source: Взято с сайта: http://www.swissdelphicenter.ch
ID: 01015