def _parseLayers(self):
with change_directory(self.project_root):
# remove map layers
self.layerRegistry.removeMapLayers(
self.layerRegistry.mapLayers().keys()
)
for layer in self._iterateOverTagByName('maplayer'):
layer_type = self._getAttr(layer, 'type').value()
if layer_type == 'vector':
qgsLayer = QgsVectorLayer()
elif layer_type == 'raster':
qgsLayer = QgsRasterLayer()
# read layer from XML
if not(qgsLayer.readLayerXML(layer.toElement())):
raise RuntimeError(
'Layer is not readable: {}'.format(
layer.firstChildElement('id').text()
)
)
# get layer transparency
if layer_type == 'vector':
self.LAYERS_DATA[qgsLayer.id()].update({
'transparency': qgsLayer.layerTransparency()
})
elif layer_type == 'raster':
qgsRasterRender = qgsLayer.renderer()
self.LAYERS_DATA[qgsLayer.id()].update({
'transparency': (
int((1 - qgsRasterRender.opacity()) * 100)
)
})
del qgsRasterRender
# record layer type
self.LAYERS_DATA[qgsLayer.id()].update({
'type': layer_type
})
# add layer to the QgsMapLayerRegistry
if qgsLayer.isValid():
self.layerRegistry.addMapLayer(qgsLayer, False)
LOG.debug('Loaded layer: %s', qgsLayer.id())
