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
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