[Qgis-developer] Syntax for using QList<QgsMapLayer *> signal in python

[Tim Sutton]

Hi

On Thu, Apr 19, 2012 at 7:12 PM, Larry Shaffer <larrys at dakotacarto.com> wrote:
> Sorry for extending the confusion. I now understand you were referring to
> the layersAdded signal.
>

Thanks for the ideas - I got it working using the @pyqtslot decorator
instead of the older @pyqtsignature decorator.

Regards

Tim

> Larry
>
>
>
>
> On Thu, Apr 19, 2012 at 11:03 AM, Larry Shaffer <larrys at dakotacarto.com>
> wrote:
>>
>> Hi Tim,
>>
>> On Thu, Apr 19, 2012 at 3:33 AM, Tim Sutton <lists at linfiniti.com> wrote:
>>>
>>> Hi
>>>
>>> On Thu, Apr 19, 2012 at 11:28 AM, Tim Sutton <lists at linfiniti.com> wrote:
>>> > Hi
>>> >
>>> > On Thu, Apr 19, 2012 at 11:14 AM, Denis Rouzaud
>>> > <denis.rouzaud at gmail.com> wrote:
>>> >> I would try
>>> >> SIGNAL("layersWillBeRemoved(QStringList)")
>>> >>
>>> >
>>> > Oh but its not a string list that the signal is emitting but rather a
>>> > QList of pointers to map layers?
>>> >
>>>
>>> Oh sorry I see I was the source of confusion with my python snippet -
>>> yes it is the added slot I am interested in.
>>
>>
>> I noticed that signal is already defined in the API:
>>
>> void QgsMapLayerRegistry::layersWillBeRemoved (QStringList  theLayerIds)
>>
>> Are you replacing or overloading it?
>>
>> If you're overloading it, could PyQt be getting confused by seeing both
>> signals as returning a list?
>>
>>
>>>
>>> >> On 04/19/2012 11:09 AM, Tim Sutton wrote:
>>> >>
>>> >> Hi All
>>> >>
>>> >> Does anyone know the appropriate way to connect to the new
>>> >> QgsMapLayerRegistry signal I added in python:
>>> >>
>>> >> void layersAdded( QList<QgsMapLayer *> theMapLayers );
>>> >>
>>> >> I tried:
>>> >>
>>> >>             QtCore.QObject.connect(QgsMapLayerRegistry.instance(),
>>> >>
>>> >> QtCore.SIGNAL('layersWillBeRemoved(QList<QgsMapLayer*>)'),
>>> >>                     self.getLayers)
>>> >>
>>> >> But that doesnt seem to be hitting my slot.
>>>
>>
>
>
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Tim Sutton - QGIS Project Steering Committee Member (Release  Manager)
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