[Qgis-developer] Passing pointer arrays in python

[Tim Sutton]

Hi

Many thanks Martin!

Regards

Tim

On 8/6/10, Martin Dobias <wonder.sk at gmail.com> wrote:
> Hi Tim
>
> On Fri, Aug 6, 2010 at 11:09 AM, Tim Sutton <lists at linfiniti.com> wrote:
>> Hi Martin & other pythonistas
>>
>> I'm trying to use
>>
>> void QgsRasterLayer::computeMinimumMaximumFromLastExtent        (
>> int
>> theBand, double *       theMinMax )
>>
>> Via python. However I can't seem to figure out how to pass the
>> arguments. I tried doing:
>>
>> void QgsRasterLayer::computeMinimumMaximumFromLastExtent        (
>> int
>> theBand,        double *        theMinMax )
>>
>>
>> Looking at the generated sip file:
>>
>> qgis/build/python/core/sipcoreQgsRasterLayer.cpp
>>
>> If doesnt seem to internally use a double* for the a1 var. (line 2167
>> below). Is this a bug with the sip file defs, or am I missing how to
>> use the method?
>
> Indeed the wrapper has not been generated correctly because it has
> quite specific semantics (sip expected that only one value is going to
> be returned). As a workaround, I've added another override in r14017
> which can be handled automatically by sip:
>
>>>> layer.computeMinimumMaximumFromLastExtent(1)
> (0.0, 255.0)
>
> Cheers
> Martin
>


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