Finding the column and row of the cursor in a TRichEdit
By Corbin Dunn
Delphi Developer Support
You may have come across the problem of trying to find out the current column and row position of the cursor in a rich edit. This is pretty easy to do, and the best time to do it is in the Application.OnIdle event:
procedure TForm1.ApplicationEvents1Idle(Sender: TObject;
var Done: Boolean);
var
Row, Col: Integer;
begin
// Find out what line we are on, based on the current selection's
// end (start + length).
Row := SendMessage(Richedit1.Handle, EM_EXLINEFROMCHAR, 0,
RichEdit1.SelStart + RichEdit1.SelLength);
// Find the column, from the selection end, minus the char we are on
Col := RichEdit1.SelStart + RichEdit1.SelLength -
SendMessage(Richedit1.Handle, EM_LINEINDEX, -1, 0);
// Display it in a status bar
Statusbar1.SimpleText := IntToStr(Row+1)+ ' ' + IntToStr(Col+1)
+ ' ' + DateTimeToStr(Now);
end;Download the complete source from Borland CodeCentral
Last Modified: 27-APR-01