Congratulations man! I have ran the example, it looks VERY nice.

Just some details, I can't avoid to see them.

In the SFML version: a white line.

In the Allegro version: some overlapping

All versions: It went to far

In Allegro version: Less looking cool gradient
{"name":"604968","src":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/6\/9\/69f542d9fb046fe068150bbc91d035f7.png","w":454,"h":277,"tn":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/6\/9\/69f542d9fb046fe068150bbc91d035f7"}

Hi there, it's me again...

I think you did this GUI just in time to use it in one of my projects. I need to create some binary files, the console would be enough the problem but I need UTF-8 support, and I don't get it working properly.

Anyway I tried to compile your library, but I got this error:

..\..\..\include\Gwen\Controls\Base.h|288|error: 'Gwen::Utility' has not been declared|

So I added #include "Gwen/Utility.h" to Base.h

Started compiling again, but then this:

..\gwen\src\Utility.cpp|23|error: invalid conversion from 'unsigned int' to 'const wchar_t*'|

In this part:

UnicodeString Gwen::Utility::Format( const wchar_t* fmt, ... )
{
  wchar_t strOut[ 4096 ];

  va_list s;
  va_start( s, fmt ); 
  vswprintf( strOut, sizeof(strOut), fmt, s );
  va_end(s);

  UnicodeString str = strOut;
  return str;
}

I have being reading, but besides vswprintf() is deprecated for security reasons I couldn't find anything.

---
MinGW 4.5.2
Code::Blocks
Allegro 5.0.4