setting the charset on a TrzRichEdit at runtime

[Steve Black]

Delphi 7.0 / Win 10 / Raise 5.51
I need to change the character set on some controls from the default into chinese at runtime.  I use the following proc to do it:

procedure UT_Set_Charset(TheCtrl: TObject);
// *****************************************************************************
// this proc will set the correct charset based on users lcid
// *****************************************************************************
var DecVal: Integer; // LCID decimal value as integer
HexVal: String; // LCID hex value as string
begin

DecVal := GetSystemDefaultLCID; // get LCID as decimal
HexVal := IntToHex(DecVal,4); // save LCID as hex

if HexVal = '0404' then // if taiwan chinese
begin
if (TheCtrl is TEdit) then // if a edit
with (TheCtrl as TEdit) do begin
SelectAll;
Font.Charset := CHINESEBIG5_CHARSET;
exit;
end;
if (TheCtrl is TRzEdit) then // if a rzedit
with (TheCtrl as TRzEdit) do begin
SelectAll;
Font.Charset := CHINESEBIG5_CHARSET;
exit;
end;
if (TheCtrl is TMemo) then // if a memo
with (TheCtrl as TMemo) do begin
SelectAll;
Font.Charset := CHINESEBIG5_CHARSET;
exit;
end;
if (TheCtrl is TRzMemo) then // if a rzmemo
with (TheCtrl as TRzMemo) do begin
SelectAll;
Font.Charset := CHINESEBIG5_CHARSET;
exit;
end;
if (TheCtrl is TRichEdit) then // if a RichEdit
with (TheCtrl as TRichEdit) do begin
SelectAll;
Font.Charset := CHINESEBIG5_CHARSET;
SelAttributes.Charset := CHINESEBIG5_CHARSET;
exit;
end;
if (TheCtrl is TRzRichEdit) then // if a rzRichEdit
with (TheCtrl as TRzRichEdit) do begin
SelectAll;
Font.Charset := CHINESEBIG5_CHARSET;
SelAttributes.Charset := CHINESEBIG5_CHARSET;
exit;
end;
end;

end; // of UT_Set_Charset

This works for the edits and the memos but not for the RichEdits. I had to do this because while other controls like stringgrids seem to automatically know to use the CHINESEBIG5_CHARSET if the LCID is 0404.

I know this is not a Raize problem because the base delphi 7 RichEdit has the same issue.

Any idea what I am doing wrong.

Steve…

• This topic was modified 10 months ago by Steve Black.

[Ray Konopka]

Hi Steve,

Oh wow. I haven’t really had to think about charsets in quite some time–at least not since Delphi shifted to Unicode support in Delphi 2009. As you noted, the root cause of the issue is in the TRichEdit base control (and perhaps in the underlying Windows Rich Edit control). As such, I would suggest posting a question about this in the Delphi Developer Facebook Group. Perhaps someone there will have some better insight into this.

Ray

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