[DUG] Unicode help in D7

[Stefan Mueller]

The problem with storing Unicode in utf8 is that the caller always needs to
know whether a string contains ansi or utf8 and that can get messy/buggy
real quick if you have a big project

 

I am sure you have thought about it and you have your own reason. But as far
as I am concerned, if you go down that road to slowly Unicode enable your
application (including later on maybe Form captions, labels, edits,
listboxes, etc) then using widestring and something like TNT library on
delphi7 is the easiest way (or upgrade to >delphi2009)

 


Kind Regards,
Stefan Mueller 
_______________________
R&D Manager
ORCL Toolbox LLP, Japan
 <http://www.orcl-toolbox.com/> http://www.orcl-toolbox.com

 

 

From: delphi-bounces at listserver.123.net.nz
[mailto:delphi-bounces at listserver.123.net.nz] On Behalf Of Ross Levis
Sent: Tuesday, October 02, 2012 7:25 PM
To: 'NZ Borland Developers Group - Delphi List'
Subject: Re: [DUG] Unicode help in D7

 

I've hit a snag.

 

D7 defines IShellLinkW like this.

 

  IShellLinkW = interface(IUnknown) { sl }

    [SID_IShellLinkW]

    function GetPath(pszFile: PWideChar; cchMaxPath: Integer;

      var pfd: TWin32FindData; fFlags: DWORD): HResult; stdcall;

 

I think the TWin32FindData should be TWin32FindDataW.  I take it this is a
bug, and I'll define my own one.

 

Ross.

 

From: delphi-bounces at listserver.123.net.nz
[mailto:delphi-bounces at listserver.123.net.nz] On Behalf Of Ross Levis
Sent: Tuesday, 2 October 2012 10:58 p.m.
To: 'NZ Borland Developers Group - Delphi List'
Subject: Re: [DUG] Unicode help in D7

 

Thanks for that.  I did download some free 3rd party components and pas
files I found which include a TOpenDialogW, WideFindFirst, WideFileExists,
etc.  They should be all I need.

 

I'll actually be storing everything in UTF8 and converting backwards and
forwards to full unicode as required for the Windows API.  That way I can
keep most of my code using the default AnsiString, standard TStringLists,
etc.

 

For me it would be useful if someone had created a set of UTF8 components.
I find it so much easier to work with.  I've created a UTF8FileExists
function, for example.  I suppose later Delphi versions to the conversions
automatically.

 

Cheers,

Ross.

 

From: delphi-bounces at listserver.123.net.nz
[mailto:delphi-bounces at listserver.123.net.nz] On Behalf Of Stefan Mueller
Sent: Tuesday, 2 October 2012 9:22 p.m.
To: 'NZ Borland Developers Group - Delphi List'
Subject: Re: [DUG] Unicode help in D7

 

The buffer has to be WideChar if you use the IShellLinkW interface.

 

I also had my software unicodified with delphi7. I used the TNT components
(last free version is here: http://www.axolot.com/TNT/ - it got bought out
by TMS software: http://www.tmssoftware.com/site/tmsuni.asp ) and that made
things very easy.

 

The TNT component pack adds Unicode enabled VCL-controls as well as Unicode
Windows-API support for many functions(FileOpen,FileCreate,etc) and
classes(WideStringList, etc). The library makes it easy to be dealing with
Unicode. 

 


Kind Regards,
Stefan Mueller 
_______________________
R&D Manager
ORCL Toolbox LLP, Japan
 <http://www.orcl-toolbox.com/> http://www.orcl-toolbox.com

 

 

From: delphi-bounces at listserver.123.net.nz
[mailto:delphi-bounces at listserver.123.net.nz] On Behalf Of Ross Levis
Sent: Tuesday, October 02, 2012 5:00 PM
To: 'NZ Borland Developers Group - Delphi List'
Subject: [DUG] Unicode help in D7

 

I'm adding a small amount of Unicode support in my D7 app to enable opening
files where the filenames are in foreign languages.  Currently my app can't
even open these files.  I've installed an OpenFile dialog which provides
WideString results.

 

One thing I need is to resolve shortcuts.  I have converted the following
function which I had for ANSI filenames into Unicode.  Just IShellLinkW and
TWin32FindDataW changed.

 

function ResolveShortcut(const LinkPath: WideString): WideString;

var

ShellLink: IShellLinkW

  FindData: TWin32FindDataW;

  buff: Array [0..Max_Path-1] of Char;

begin

  ShellLink := CreateComObject(CLSID_ShellLink) as IShellLinkW;

 PersistFile := ShellLink as IPersistFile;

  if (PersistFile.Load(PWideChar(LinkPath),STGM_READ) = S_OK) and

   (ShellLink.Resolve(Application.Handle, SLR_NO_UI) = NOERROR) and

   (ShellLink.GetPath(buff,MAX_PATH,FindData,SLGP_UNCPRIORITY)= NOERROR)
then

    Result := buff

  else Result := ''

end;

 

But I'm not sure if the buff array should be of WideChar or left as Char.

 

Does MAX_PATH assume wide characters?

 

Thanks,

Ross.

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