Re: Issue with 'unsigned char const *'

By default sip is expecting an int or int-compatible object for unsigned 
char values, and it doesn't know whether it should be a pointer to a single 
value or an array of values, so it just takes the safest choice. I can 
tweak some things in the wrappers to allow it to accept buffer-compatible 
objects, but in the meantime, is there any reason that MarkerDefineBitmap 
won't work for you?

-- 
Robin Dunn
Software Craftsman
http://wxPython.org



On Tuesday, January 30, 2018 at 6:41:29 AM UTC-8, [email protected] 
wrote:
>
> Hello,
>
> I'm trying to use StyledTextCtrl_MarkerDefineRGBAImage function,
> but I can't find out how the image must be passed.
>
> From scintilla documention I get that it is supposed to be 
>
> SCI_MARKERDEFINERGBAIMAGE(int markerNumber, const char *pixels)
>
> so I thought it should work by providing a string
>
> img = '\x00\x00\x00\x00'
> editor.RGBAImageSetWidth(14)
> editor.MarkerDefineRGBAImage(0,img)
>
>
>
> then I tried passing a list
>
> img = [0,0,0,0]
> editor.MarkerDefineRGBAImage(0,img)
>
>
>
> and finally I tried using ctypes with byte and ubyte
>
> import ctypes
> img = ctypes.c_ubyte*4
> img.from_buffer_copy('\x00\x00\x00\x00')
> <c_ubyte_Array_4 object at 0x7f9902a5c9e0>
> for i in img():
>     print i
>
> 0
> 0
> 0
> 0
>
> editor.MarkerDefineRGBAImage(0,img())
>
> editor.MarkerDefineRGBAImage(0,ctypes.byref(img()))
>
> editor.MarkerDefineRGBAImage(0,ctypes.pointer(img()))
>
> but all returned the same error
>
> Traceback (most recent call last):
>   File "<input>", line 1, in <module>
>   File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/stc.py", line 
> 6371, in MarkerDefineRGBAImage
>     return _stc.StyledTextCtrl_MarkerDefineRGBAImage(*args, **kwargs)
> *TypeError: in method 'StyledTextCtrl_MarkerDefineRGBAImage', expected 
> argument 3 of type 'unsigned char const *'*
>     
> So, how do I provide a 'unsigned char const *'?
>
> Thank you
> Claudia
>

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