[Qgis-developer] Reliable way to determine a groupIndex in the legend tree

[Bernhard Ströbl]

Hi

Am 09.10.2013 08:12, schrieb Denis Rouzaud:
> Hi,
>
> I am not sure we should make any publicity to the legend API which is
> very bad.
>
> I hope these methods will deprecated soon ;)

I think any change making the handling of groups easier is appreciated.

Bernhard

>
> Cheers,
>
>
> Denis
>
>
> On 10/08/2013 04:08 PM, Andreas Neumann wrote:
>> Hi,
>>
>> Thank you Bernhard. This works better than my code with the
>> legend.groupLayerRelationship()
>>
>> We should add this to the Python Cookbook
>> (http://www.qgis.org/en/docs/pyqgis_developer_cookbook/) - Do you mind?
>> Or should I do a pull request?
>>
>> Do you have a clever strategy to make this same code available in
>> multiple QGIS plugins?
>>
>> But really this should go into the core QGIS API. It is annoying taking
>> care of such things.
>>
>> Andreas
>>
>> Am 08.10.2013 13:32, schrieb Bernhard Ströbl:
>>> Hi Andreas,
>>>
>>> this is how I do it:
>>>
>>> def getGroupIndex(self, groupName):
>>> '''Find the index for group groupName'''
>>> retValue = -1
>>> groups = self.iface.legendInterface().groups()
>>>
>>> for i in range(len(groups)):
>>> if groups[i] == groupName:
>>> retValue = i
>>> break
>>>
>>> return retValue
>>>
>>> def moveToGroup(self, layer, groupName):
>>> '''move layer into a group'''
>>>
>>> grpIdx = self.getGroupIndex(groupName)
>>>
>>> if grpIdx == -1:
>>> # add the group
>>> grpIdx = self.iface.legendInterface().addGroup(groupName)
>>>
>>> self.iface.legendInterface().moveLayer(layer, grpIdx)
>>>
>>> Bernhard
>>>
>>> Am 08.10.2013 15:17, schrieb Andreas Neumann:
>>>> Hi,
>>>>
>>>> In my python script I would like to append a filtered Postgis layer
>>>> into
>>>> a group with a given name.
>>>>
>>>> This works fine as long as the user did not activate a group already
>>>> interactively. If a group is already active, my method to find the
>>>> groupIndex fails. If not group is active, the script works fine.
>>>>
>>>> Here is my method:
>>>>
>>>> ---------------
>>>> #read the legend tree to find the index of the group defined in
>>>> groupName
>>>> groups = []
>>>> for group in self.legend.groupLayerRelationship():
>>>> groups.append(group[0])
>>>> groupIndex = groups.index(groupName)
>>>> if QGis.QGIS_VERSION[0:3] >= "1.9":
>>>> groupIndex -= 1
>>>>
>>>> #move new layer to existing group
>>>> self.legend.moveLayer(schulkreisLayer, groupIndex)
>>>> --------------
>>>>
>>>> Is there a more reliable way to find the groupIndex if the user
>>>> selected
>>>> a group already?
>>>>
>>>> Maybe there is some interference with the setting "New layers should be
>>>> added to chosen or current group" setting in "Settings" --> "Options"
>>>> --> "Map & Legend" --> "Layerlegend"?
>>>>
>>>> Thanks,
>>>> Andreas
>>>> _______________________________________________
>>>> Qgis-developer mailing list
>>>> Qgis-developer at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>>>
>>>>
>>>
>>>
>>> __________ Information from ESET Mail Security, version of virus
>>> signature database 8890 (20131008) __________
>>>
>>> The message was checked by ESET Mail Security.
>>> http://www.eset.com
>>>
>>>


__________ Information from ESET Mail Security, version of virus signature database 8893 (20131008) __________

The message was checked by ESET Mail Security.
http://www.eset.com