Thanks Even,
Yes, deleting the spaces seems to get it working correctly. Is this expected?
Are spaces an illegal part of a style string?
The documentation includes spaces in the example .ofs file there, so I had
copied that format when creating my text file.
Cheers,
Nik.
On 3 Aug 2014, at 8:45 pm, Even Rouault <even.roua...@mines-paris.org> wrote:
> Le dimanche 03 août 2014 12:41:56, Nik Sands a écrit :
>> Sorry, my mistake... I had my logging in the wrong place. styleChars is
>> actually of the form (including the leading space):
>>
>> ' PEN(c:#A08080,w:2pt); LABEL(c:#000000,s:18pt,t:{title})'
>
> The issue must be the leading space before PEN, and potentially LABEL too.
>
>>
>> On 3 Aug 2014, at 8:35 pm, Nik Sands <nix...@nixanz.com> wrote:
>>> On one of the iterations through this code, styleChars is:
>>> 'vegetation_low: BRUSH(fc:#A0F0A0); LABEL(c:#004000,s:18pt,t:{title})'
>>>
>>> So perhaps the inclusion of the style name is the problem?
>>>
>>> This was read into a style table from a text file using
>>> 'OGR_STBL_LoadStyleTable()'. I had assumed that a similar format to
>>> .ofs was suitable. If this is not the case, how should I read a style
>>> table from a text file in such a way that I can distinguish the various
>>> styles by name?
>>>
>>> In guess my more general question is: What is the correct way to read
>>> styles from an arbitrary text file into a style table, and then use a
>>> style manager to get the various parts/tools?
>>>
>>> On 3 Aug 2014, at 8:26 pm, Even Rouault <even.roua...@mines-paris.org>
> wrote:
>>>> Le dimanche 03 août 2014 12:11:42, Nik Sands a écrit :
>>>>> I'm just starting out using the styles features of OGR (using the C
>>>>> API) but at struggling with a few elements of it.
>>>>>
>>>>> My code (copied below) fails to get any OGRStyleToolH. Ie, the "if (
>>>>> tool )" block never gets run, because 'tool' is always NULL at the
>>>>> point indicated by the comment. But the execution does reach that
>>>>> point in the code which indicates that the OGRStyleMrgH does in fact
>>>>> include at least one part (tool).
>>>>>
>>>>> I'd be grateful if somebody could point out what I'm doing wrong.
>>>>
>>>> Nothing strikes me as wrong. A potential explanation is that styleChars
>>>> doesn't contain a valid OGR Feature Style string.
>>>> GetPartCount() counts the number of ";" separating style parts, but it
>>>> doens't check that each style part actually begins by a recognized tool
>>>> name (PEN, BRUSH, SYMBOL, LABEL). OGR_SM_GetPart() does this check
>>>> however and if it cannot recognize it it returns a NULL tool.
>>>>
>>>>> Thanks,
>>>>> Nik.
>>>>>
>>>>>
>>>>> -------------------------------------------
>>>>>
>>>>> const char *styleChars = OGR_STBL_GetNextStyle(table) ) )
>>>>> NSString *styleName = [NSString
>>>>>
>>>>> stringWithUTF8String:OGR_STBL_GetLastStyleName(table)]; OGRStyleMgrH
>>>>> styleMgr = OGR_SM_Create(NULL);
>>>>>
>>>>> OGR_SM_InitStyleString(styleMgr, styleChars);
>>>>>
>>>>>
>>>>> for ( int i = 0; i < OGR_SM_GetPartCount(styleMgr, NULL); i++ )
>>>>> {
>>>>>
>>>>> OGRStyleToolH tool = OGR_SM_GetPart(styleMgr, i, NULL);
>>>>>
>>>>> if ( tool ) // 'tool' always NULL here
>>>>> {
>>>>>
>>>>> switch ( OGR_ST_GetType(tool) )
>>>>> {
>>>>>
>>>>> case OGRSTCPen:
>>>>> self.pen = tool;
>>>>> break;
>>>>>
>>>>> case OGRSTCBrush:
>>>>> self.brush = tool;
>>>>> break;
>>>>>
>>>>> case OGRSTCSymbol:
>>>>> self.symbol = tool;
>>>>> break;
>>>>>
>>>>> case OGRSTCLabel:
>>>>> self.label = tool;
>>>>> break;
>>>>>
>>>>> default:
>>>>> NSLog(@"Unknown style tool type!");
>>>>> break;
>>>>>
>>>>> }
>>>>>
>>>>> }
>>>>>
>>>>> }
>>>>>
>>>>> -------------------------------------------
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> gdal-dev mailing list
>>>>> gdal-dev@lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>
>>> _______________________________________________
>>> gdal-dev mailing list
>>> gdal-dev@lists.osgeo.org
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>
> --
> Geospatial professional services
> http://even.rouault.free.fr/services.html
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