def exposure_value_attribute(self, value):
# self.exposure is from IF base class.
exposure_layer = self.exposure.qgis_vector_layer()
if (exposure_layer and check_attribute_exist(exposure_layer, value)):
self._exposure_value_attribute = value
else:
message = ('The attribute "%s" does not exist in the hazard '
'layer.') % value
raise NoAttributeInLayerError(message)
# finding minima and maxima in a layer
if exposure_layer:
attr_index = exposure_layer.dataProvider().\
fieldNameIndex(value)
min_val = sys.maxint
max_val = -sys.maxint - 1
for feature in exposure_layer.getFeatures():
try:
feature_value = feature.attributes()[attr_index]
feature_value = float(feature_value)
if feature_value < min_val:
min_val = feature_value
if feature_value > max_val:
max_val = feature_value
except (ValueError, TypeError):
pass
self.exposure_min_value = min_val
self.exposure_max_value = max_val
def exposure_value_attribute(self, value):
# self.exposure is from IF base class.
exposure_layer = self.exposure.qgis_vector_layer()
if (exposure_layer and
check_attribute_exist(exposure_layer, value)):
self._exposure_value_attribute = value
else:
message = ('The attribute "%s" does not exist in the hazard '
'layer.') % value
raise NoAttributeInLayerError(message)
# finding minima and maxima in a layer
if exposure_layer:
attr_index = exposure_layer.dataProvider().\
fieldNameIndex(value)
min_val = sys.maxint
max_val = -sys.maxint - 1
for feature in exposure_layer.getFeatures():
try:
feature_value = feature.attributes()[attr_index]
feature_value = float(feature_value)
if feature_value < min_val:
min_val = feature_value
if feature_value > max_val:
max_val = feature_value
except (ValueError, TypeError):
pass
self.exposure_min_value = min_val
self.exposure_max_value = max_val
def hazard_class_attribute(self, value):
# self.hazard is from IF base class.
hazard_layer = self.hazard.qgis_vector_layer()
if hazard_layer and check_attribute_exist(hazard_layer, value):
self._hazard_class_attribute = value
else:
message = ('The attribute "%s" does not exist in the hazard '
'layer.') % value
raise NoAttributeInLayerError(message)
def hazard_class_attribute(self, value):
# self.hazard is from IF base class.
hazard_layer = self.hazard.qgis_vector_layer()
if hazard_layer and check_attribute_exist(hazard_layer, value):
self._hazard_class_attribute = value
else:
message = ('The attribute "%s" does not exist in the hazard '
'layer.') % value
raise NoAttributeInLayerError(message)
def exposure_class_attribute(self, value):
# self.exposure is from base IF.
exposure_layer = self.exposure.qgis_vector_layer()
if (exposure_layer and
check_attribute_exist(exposure_layer, value)):
self._exposure_class_attribute = value
else:
message = ('The attribute "%s" does not exist in the exposure '
'layer.') % value
raise NoAttributeInLayerError(message)
# finding unique values in layer
if exposure_layer:
attr_index = exposure_layer.dataProvider().\
fieldNameIndex(value)
unique_list = list()
for feature in exposure_layer.getFeatures():
feature_value = feature.attributes()[attr_index]
if feature_value not in unique_list:
unique_list.append(feature_value)
self.exposure_unique_values = unique_list