[vtkusers] Show Chinese Character on qvtkwidget

[Simon ESNEAULT]

Hi Lee,

I think this is error shows up because you are converting the string to
local 8 bit when calling the function .toStdString() *
The string must be encoded in Utf8 ** to be rendered properly in VTK.

Try to replace the lines :
----------------------------------------------
std::string str = temp.toStdString();
const char* ch = str.c_str();
m_textActor->SetInput(ch);
----------------------------------------------
by
----------------------------------------------
m_textActor->SetInput( temp.toUtf8().constData() );
----------------------------------------------
Also make sure you save your source file in Utf8

Good luck

Simon

* http://doc.qt.io/qt-4.8/qstring.html#toStdString
** http://en.wikipedia.org/wiki/UTF-8


2015-04-28 3:54 GMT+02:00 lee <lihouxing at yeah.net>:

> Hi,
>      Thanks for your method, but it only works for English character, when
> the string contains Chinese characters, errors come up as follow:
>
> *Generic Warning: In ..\..\..\VTK-6.1.0\Common\Core\vtkUnicodeString.cxx,
> line 183
> vtkUnicodeString::from_utf8(): not a valid UTF-8 string.
>
> Generic Warning: In ..\..\..\VTK-6.1.0\Common\Core\vtkUnicodeString.cxx,
> line 183
> vtkUnicodeString::from_utf8(): not a valid UTF-8 string.
>
> ERROR: In ..\..\..\VTK-6.1.0\Rendering\FreeType\vtkTextActor.cxx, line 803
> vtkScaledTextActor (00D01410): Cannot compute bounding box.
> *
>
>
>
>
>
> --
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Simon Esneault
Rennes, France
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