def get_layer_description_from_canvas(self, layer, purpose):
"""Obtain the description of a canvas layer selected by user.
:param layer: The QGIS layer.
:type layer: QgsMapLayer
:param category: The category of the layer to get the description.
:type category: string
:returns: description of the selected layer.
:rtype: string
"""
if not layer:
return ""
try:
keywords = self.keyword_io.read_keywords(layer)
if 'layer_purpose' not in keywords:
keywords = None
except (HashNotFoundError,
OperationalError,
NoKeywordsFoundError,
KeywordNotFoundError,
InvalidParameterError,
UnsupportedProviderError):
keywords = None
# set the current layer (e.g. for the keyword creation sub-thread)
self.layer = layer
if purpose == 'hazard':
self.hazard_layer = layer
elif purpose == 'exposure':
self.exposure_layer = layer
else:
self.aggregation_layer = layer
# Check if the layer is keywordless
if keywords and 'keyword_version' in keywords:
kw_ver = str(keywords['keyword_version'])
self.is_selected_layer_keywordless = (
not is_keyword_version_supported(kw_ver))
else:
self.is_selected_layer_keywordless = True
desc = layer_description_html(layer, keywords)
return desc
def get_layer_description_from_canvas(self, layer, purpose):
"""Obtain the description of a canvas layer selected by user.
:param layer: The QGIS layer.
:type layer: QgsMapLayer
:param category: The category of the layer to get the description.
:type category: string
:returns: description of the selected layer.
:rtype: string
"""
if not layer:
return ""
try:
keywords = self.keyword_io.read_keywords(layer)
if 'layer_purpose' not in keywords:
keywords = None
except (HashNotFoundError, OperationalError, NoKeywordsFoundError,
KeywordNotFoundError, InvalidParameterError,
UnsupportedProviderError):
keywords = None
# set the current layer (e.g. for the keyword creation sub-thread)
self.layer = layer
if purpose == 'hazard':
self.hazard_layer = layer
elif purpose == 'exposure':
self.exposure_layer = layer
else:
self.aggregation_layer = layer
# Check if the layer is keywordless
if keywords and 'keyword_version' in keywords:
kw_ver = str(keywords['keyword_version'])
self.is_selected_layer_keywordless = (
not is_keyword_version_supported(kw_ver))
else:
self.is_selected_layer_keywordless = True
desc = layer_description_html(layer, keywords)
return desc
def get_layer_description_from_browser(self, category):
"""Obtain the description of the browser layer selected by user.
:param category: The category of the layer to get the description.
:type category: string
:returns: Tuple of boolean and string. Boolean is true if layer is
validated as compatible for current role (impact function and
category) and false otherwise. String contains a description
of the selected layer or an error message.
:rtype: tuple
"""
if category == 'hazard':
browser = self.tvBrowserHazard
elif category == 'exposure':
browser = self.tvBrowserExposure
elif category == 'aggregation':
browser = self.tvBrowserAggregation
else:
raise InaSAFEError
index = browser.selectionModel().currentIndex()
if not index:
return False, ''
# Map the proxy model index to the source model index
index = browser.model().mapToSource(index)
item = browser.model().sourceModel().dataItem(index)
if not item:
return False, ''
item_class_name = item.metaObject().className()
# if not itemClassName.endswith('LayerItem'):
if not item.type() == QgsDataItem.Layer:
if item_class_name == 'QgsPGRootItem' and not item.children():
return False, create_postGIS_connection_first
else:
return False, ''
if item_class_name not in [
'QgsOgrLayerItem', 'QgsGdalLayerItem', 'QgsPGLayerItem',
'QgsLayerItem', ]:
return False, ''
path = item.path()
if item_class_name in ['QgsOgrLayerItem', 'QgsGdalLayerItem',
'QgsLayerItem'] and not os.path.exists(path):
return False, ''
# try to create the layer
if item_class_name == 'QgsOgrLayerItem':
layer = QgsVectorLayer(path, '', 'ogr')
elif item_class_name == 'QgsPGLayerItem':
uri = self.pg_path_to_uri(path)
if uri:
layer = QgsVectorLayer(uri.uri(), uri.table(), 'postgres')
else:
layer = None
else:
layer = QgsRasterLayer(path, '', 'gdal')
if not layer or not layer.isValid():
return False, self.tr('Not a valid layer.')
try:
keywords = self.keyword_io.read_keywords(layer)
if ('layer_purpose' not in keywords and
'impact_summary' not in keywords):
keywords = None
except (HashNotFoundError,
OperationalError,
NoKeywordsFoundError,
KeywordNotFoundError,
InvalidParameterError,
UnsupportedProviderError,
MissingMetadata):
keywords = None
# set the layer name for further use in the step_fc_summary
if keywords:
layer.setLayerName(keywords.get('title'))
if not self.parent.is_layer_compatible(layer, category, keywords):
label_text = '%s<br/>%s' % (
self.tr(
'This layer\'s keywords or type are not suitable:'),
self.unsuitable_layer_description_html(
layer, category, keywords))
return False, label_text
# set the current layer (e.g. for the keyword creation sub-thread
# or for adding the layer to mapCanvas)
self.parent.layer = layer
if category == 'hazard':
self.parent.hazard_layer = layer
elif category == 'exposure':
self.parent.exposure_layer = layer
else:
self.parent.aggregation_layer = layer
# Check if the layer is keywordless
if keywords and 'keyword_version' in keywords:
kw_ver = str(keywords['keyword_version'])
self.parent.is_selected_layer_keywordless = (
not is_keyword_version_supported(kw_ver))
else:
self.parent.is_selected_layer_keywordless = True
desc = layer_description_html(layer, keywords)
return True, desc
