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...use URL highlighting in TRichEdit?
Autor: Mike Shkolnik
Homepage: http://www.scalabium.com
[ Print tip ]  

Tip Rating (3):  
     


{....}

  
protected
    procedure 
WndProc(var Message: TMessage); override;
    
{....}


uses Richedit, ShellApi;

{Today I want to show how to implement URL highlighting and URL navigation
without any third-party components. This functionality is implemented in
RichEdit from Microsoft (and MS Outlook use this feature, for example) and
only Borland's developers didn't publish it for us.}

procedure TForm1.FormCreate(Sender: TObject);
var
  
mask: Word;
begin
  
mask := SendMessage(RichEdit1.Handle, EM_GETEVENTMASK, 0, 0);
  SendMessage(RichEdit1.Handle, EM_SETEVENTMASK, 0, mask or ENM_LINK);
  SendMessage(RichEdit1.Handle, EM_AUTOURLDETECT, Integer(True), 0);

  //Some text in RichEdit
  
RichEdit1.Text := 'Scalabium Software'#13#10 +
    ' Site is located at www.scalabium.com. Welcome to our site.';
end;

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;

 

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