| Q :--在RichEdit如何定位光标位置? Re: 如题,如何将光标定位在x行y列? 仔细看看下面的代码,希望给你以启示... // 指定输入游标的位置 procedure SetCaret(RTF: TRichEdit; var Row, Col: word); var i, iStopLine, iSelStart: integer; begin if (RTF = nil) then Exit; if Row = 0 then Row := 1; if Col = 0 then Col := 1; // 到第 Row 列, Col 行共几个字元 iStopLine := Row - 1; iSelStart := 0; for i := 0 to RTF.Lines.Count - 1 do begin if i = iStopLine then begin if Length(RTF.Lines[i]) >= Col then Inc(iSelStart, Col) else Inc(iSelStart, Length(RTF.Lines[i]) + 2); Break; end; Inc(iSelStart, Length(RTF.Lines[i]) + 2); end; if iSelStart > 0 then Dec(iSelStart); // 以设定标记的方式指定游标位置 SendMessage(RTF.Handle, EM_SETSEL, iSelStart, iSelStart); // 再次侦测游标位置 Row := SendMessage(RTF.Handle, EM_LINEFROMCHAR, RTF.SelStart, 0); Col := RTF.SelStart - SendMessage(RTF.Handle, EM_LINEINDEX, Row, 0); // 卷到游标所在位置 SendMessage(RTF.Handle, EM_SCROLLCARET, 0, 0); end; procedure TForm1.Button1Click(Sender: TObject); var iRow, iCol: word; begin iRow := 17; iCol := 3; SetCaret(RichEdit1, iRow, iCol); RichEdit1.SetFocus; end; |