Title: save/load a font information in INI/text-file
Question: How can I save/restore the TFont-object in INI and/or text file?
Answer:
Sometimes you need to save/to load a font information in INI-file, Registry or some text file.
Now I desribe the some different methods.
1. very easy but not result isn't compact and effective (by data storage)
procedure SaveFont(FStream: TIniFile; Section: string; smFont: TFont);
begin
FStream.WriteString(Section, Ident + 'Name', smFont.Name);
FStream.WriteInteger(Section, Ident + 'CharSet', smFont.CharSet);
FStream.WriteInteger(Section, Ident + 'Color', smFont.Color);
FStream.WriteInteger(Section, Ident + 'Size', smFont.Size);
FStream.WriteInteger(Section, Ident + 'Style', Byte(smFont.Style));
end;
procedure LoadFont(FStream: TIniFile; Section: string; smFont: TFont);
begin
smFont.Name := FStream.ReadString(Section, Ident + 'Name', smFont.Name);
smFont.CharSet := TFontCharSet(FStream.ReadInteger(Section, Ident + 'CharSet', smFont.CharSet));
smFont.Color := TColor(FStream.ReadInteger(Section, Ident + 'Color', smFont.Color));
smFont.Size := FStream.ReadInteger(Section, Ident + 'Size', smFont.Size);
smFont.Style := TFontStyles(Byte(FStream.ReadInteger(Section, Ident + 'Style', Byte(smFont.Style))));
end;
2. more hardly than first method, but result is compact. I use this method in all own apps.
procedure SaveFont(FStream: TIniFile; Section: string; smFont: TFont);
begin
FStream.WriteString(Section, 'Font', smFont.Name + ',' +
IntToStr(smFont.CharSet) + ',' +
IntToStr(smFont.Color) + ',' +
IntToStr(smFont.Size) + ',' +
IntToStr(Byte(smFont.Style)));
end;
procedure LoadFont(FStream: TIniFile; Section: string; smFont: TFont);
var s, Data: string;
i: Integer;
begin
s := FStream.ReadString(Section, 'Font', ',,,,');
try
i := Pos(',', s);
if i 0 then
begin
{Name}
Data := Trim(Copy(s, 1, i-1));
if Data '' then
smFont.Name := Data;
Delete(s, 1, i);
i := Pos(',', s);
if i 0 then
begin
{CharSet}
Data := Trim(Copy(s, 1, i-1));
if Data '' then
smFont.Charset := TFontCharSet(StrToIntDef(Data, smFont.Charset));
Delete(s, 1, i);
i := Pos(',', s);
if i 0 then
begin
{Color}
Data := Trim(Copy(s, 1, i-1));
if Data '' then
smFont.Color := TColor(StrToIntDef(Data, smFont.Color));
Delete(s, 1, i);
i := Pos(',', s);
if i 0 then
begin
{Size}
Data := Trim(Copy(s, 1, i-1));
if Data '' then
smFont.Size := StrToIntDef(Data, smFont.Size);
Delete(s, 1, i);
{Style}
Data := Trim(s);
if Data '' then
smFont.Style := TFontStyles(Byte(StrToIntDef(Data,
Byte(smFont.Style))));
end
end
end
end;
except
end;
end;
3. as alternative for 1&2 methods I can offer the third - you can create a temporary stream, save the wished font component in this stream (Stream.SaveComponent) and then you can navigate the byte-by-byte in stream, to convert each byte into hex (or some other radix) and save into your text file as string. Each byte is a two symbols for hex radix. For font reading - on the contrary...
PS: personally I not used this method:)))