I have a TRichEdit with some RTF in it (text with formatting only) and I want to know if all the content of the TRichEdit is selected. To do so, I do:
var AllSelectd: Boolean;
//...
AllSelectd := MyRichEdit.SelLength = MyRichEdit.GetTextLen;
which works fine, except when the content has three lines or more. With zero to two lines, everything is fine. As soon as I reach three lines in my TRichEdit, the code above no longer works ( MyRichEdit.SelLength < MyRichEdit.GetTextLen
). Each line is terminated with CRLF ( #13#10
).
Is this a bug? How can I reliably check if everything is selected in the TRichEdit?
I use Delphi 10.4, if it changes anything.
As mentioned in this topic , RichEdit 2.0 replaces CRLF pairs with CR internally, and retrieves LF's in some cases.
As workaround - calculate number of lines in selected range to make correction ( SelText
contains only CR's, GetTextLen
works with text with retrieved CRLF, so counts both CR's and LF's). Remy Lebeau proposal is used.
var
sel, getl, crcnt, i: integer;
tx: string;
begin
sel := RichEdit1.SelLength;
getl := RichEdit1.GetTextLen;
crcnt := SendMessage(Richedit1.Handle, EM_EXLINEFROMCHAR, 0, sel);
Memo1.Lines.Add(Format('%d %d',[sel, getl - crcnt + 1]));
end;
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