CODEWITHSUNDEEP
delphiunicodecomponentsdelphi-xe2
Vijesh V.Nair
Vijesh V.Nair

Reputation: 175

Add Unicode support to TreeNT component

I am using TreeNT Component in my application. I am working on migrating the application to XE2. I have recompiled the component in XE2. When running its not showing the node caption in the window.

Can you give me some tips to manually migrate a third party component to XE2?

Upvotes: 0

Views: 268

Answers (1)

Arioch 'The
Arioch 'The

Reputation: 16045

There are a lot of articles about Unicode in Delphi Porting of components is no different from porting applications. Find and read them. Really do.

You'd be hit by PChar -> PAnsiChar/PWideChar ambuiguity, especially if you work in {$T-} mode. Check that your pointers are typed when compiling.

You'd be hit if you did not multiply on Sizeof(char) when allocating buffers or moving raw data my move procedure.

You'd better to search for ambiguous types - char, pchar, string - and remove them, explicitly substituting them by WideChar/PWideChar/UnicodeString or AnsiChar/PAnsiChar/AnsiString depending on context. Thus you would both learn where type transitions may occur and perhaps make compiler so type-checking for you. ShortStirng type (string[255] used bye TreeNT) is non-Unicode by definition. Take care everyplace when you access it.

You'd be hit if you make direct imports from Windows DLLs and specified "A" at the Windows functions name. That can easily result in ANSI function getting unexpected UTF-16 data.

Try to search if someone already did it. For example http://code.google.com/p/keynote-nf/source/browse/trunk/3rd_party/treent/TreeNT.pas - but this ended in 2007, before Unicode in Delphi RTL.

Upvotes: 1

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