I made a little plugin in QGIS, and I got some strange results.
The program now mirrors the "Layers Panel". When I add or delete layers from the Panel the
QListWidget module get the names of layers.
I connected the function to the
legendLayersAdded and to
THE PROBLEM: The add part is ok, and if I remove ONE layer that's fine too. But if I remove multiple layers, the widget gets back the rest of layers' names multiple times (count of removed layers).
Community edit: For however many multiple layers are removed, the remaining layers appear in the list that many times. Ergo, if 3 layers are removed, and there is 1 remaining, that layer appears 3 times in the additional layer pane:
It's like the signal calls the function recursively!? I tried with the layerWasRemoved Signal and the result was the same I made a video of it because it is hard to explain.
Here is the code:
def ablak(self): layers =  self.dockwidget.telepules_kezelo.clear() layers = self.iface.legendInterface().layers() print "Befor" # Befor layer list print layers # Layer list "from Layers Panel" print "After" # After layer list i = 0 # Just a counter for debubing lista = self.dockwidget.telepules_kezelo for layer in layers: print layer.name() lista.addItem(layer.name()) i = i+1 print i # Counter for debuging layers =  QgsMapLayerRegistry.instance().legendLayersAdded.connect(self.ablak) QgsMapLayerRegistry.instance().layersRemoved.connect(self.ablak)
I fade out the problem with transfer the
self.dockwidget.telepules_kezelo.clear() line after the
Print After line. And it's working fine, but I am really frustrated with it.