[Lazarus] FontCanUTF8(Font: HFont)

Hans-Peter Diettrich DrDiettrich1 at aol.com
Sat Nov 26 10:27:02 CET 2011

Felipe Monteiro de Carvalho schrieb:
> You have to read the implementations to see what the routines do, and
> in this case it looks pretty clear that it is a legacy introduced
> because LCL-gtk1 needed it.
> It probably can be deprecated.

Reading the implementation doesn't help much, as can be seen with your 

> function TGTKWidgetSet.FontCanUTF8(Font: HFont): boolean;
> begin
>   Result:=IsValidGDIObject(Font)
>     {$IFDEF Gtk1}
>     and FontIsDoubleByteCharsFont(PGdiObject(Font)^.GDIFontObject)
>     {$ENDIF}
>     ;
> end;

What does *FontIsDoubleByteCharsFont* mean? This *might* mean UTF-16, 
but then the name *FontCanUTF8* already is wrong.

IMO a usable software should *not* require the user to guess, what 
various implementations *might* do. Instead the *implementors*, who 
*know* what to implement, should leave at least a small note on the 
purpose of every procedure or method. That's little work for the Lazarus 
team, which saves many months to the documentation writers :-]

Not to forget possibly or definitely wrong descriptions, as found in 
many places in the documentation :-(


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