def accept(self):
"""Process the layer and field and generate a new layer.
.. note:: This is called on OK click.
"""
# run minimum needs calculator
try:
success, self.result_layer = (
self.minimum_needs(self.layer.currentLayer()))
if not success:
return
except Exception as e:
error_name, traceback = humanise_exception(e)
message = (
'Problem(s) occured. \n%s \nDiagnosis: \n%s' % (
error_name, traceback))
display_critical_message_box(
title=self.tr('Error while calculating minimum needs'),
message=message)
return
# remove monkey patching keywords
del self.result_layer.keywords
# write memory layer to file system
settings = QSettings()
default_user_directory = settings.value(
'inasafe/defaultUserDirectory', defaultValue='')
if default_user_directory:
output_directory = os.path.join(
default_user_directory, 'minimum_needs_calculator')
if not os.path.exists(output_directory):
os.makedirs(output_directory)
else:
output_directory = temp_dir(sub_dir='minimum_needs_calculator')
output_layer_name = os.path.split(self.result_layer.name())[1]
# If normal filename doesn't exist, then use normal filename
random_string_length = len(output_layer_name.split('_')[-1])
normal_filename = output_layer_name[:-(random_string_length + 1)]
if not os.path.exists(os.path.join(output_directory, normal_filename)):
output_layer_name = normal_filename
data_store = Folder(output_directory)
data_store.default_vector_format = 'geojson'
data_store.add_layer(self.result_layer, output_layer_name)
self.result_layer = data_store.layer(output_layer_name)
# noinspection PyArgumentList
QgsMapLayerRegistry.instance().addMapLayers(
[data_store.layer(self.result_layer.name())])
self.done(QtGui.QDialog.Accepted)
def accept(self):
"""Process the layer and field and generate a new layer.
.. note:: This is called on OK click.
"""
# run minimum needs calculator
try:
success, self.result_layer = (
self.minimum_needs(self.layer.currentLayer()))
if not success:
return
except Exception as e:
error_name, traceback = humanise_exception(e)
message = (
'Problem(s) occured. \n%s \nDiagnosis: \n%s' % (
error_name, traceback))
display_critical_message_box(
title=self.tr('Error while calculating minimum needs'),
message=message)
return
# remove monkey patching keywords
del self.result_layer.keywords
# write memory layer to file system
settings = QSettings()
default_user_directory = settings.value(
'inasafe/defaultUserDirectory', defaultValue='')
if default_user_directory:
output_directory = os.path.join(
default_user_directory, 'minimum_needs_calculator')
if not os.path.exists(output_directory):
os.makedirs(output_directory)
else:
output_directory = temp_dir(sub_dir='minimum_needs_calculator')
output_layer_name = os.path.split(self.result_layer.name())[1]
# If normal filename doesn't exist, then use normal filename
random_string_length = len(output_layer_name.split('_')[-1])
normal_filename = output_layer_name[:-(random_string_length + 1)]
if not os.path.exists(os.path.join(output_directory, normal_filename)):
output_layer_name = normal_filename
data_store = Folder(output_directory)
data_store.default_vector_format = 'geojson'
data_store.add_layer(self.result_layer, output_layer_name)
self.result_layer = data_store.layer(output_layer_name)
# noinspection PyArgumentList
QgsProject.instance().addMapLayers(
[data_store.layer(self.result_layer.name())])
self.done(QtWidgets.QDialog.Accepted)
def accept(self):
"""Process the layer and field and generate a new layer.
.. note:: This is called on OK click.
"""
# run minimum needs calculator
try:
success, self.result_layer = (
self.minimum_needs(self.layer.currentLayer()))
if not success:
return
except Exception as e:
error_name, traceback = humanise_exception(e)
message = (
'Problem(s) occured. \n%s \nDiagnosis: \n%s' % (
error_name, traceback))
display_critical_message_box(
title=self.tr('Error while calculating minimum needs'),
message=message)
return
# remove monkey patching keywords
del self.result_layer.keywords
# write memory layer to file system
settings = QSettings()
default_user_directory = settings.value(
'inasafe/defaultUserDirectory', defaultValue='')
if default_user_directory:
path = os.path.join(
default_user_directory, self.result_layer.name())
if not os.path.exists(path):
os.makedirs(path)
data_store = Folder(path)
else:
data_store = Folder(temp_dir(sub_dir=self.result_layer.name()))
data_store.default_vector_format = 'geojson'
data_store.add_layer(self.result_layer, self.result_layer.name())
self.result_layer = data_store.layer(self.result_layer.name())
# noinspection PyArgumentList
QgsMapLayerRegistry.instance().addMapLayers(
[data_store.layer(self.result_layer.name())])
self.done(QtGui.QDialog.Accepted)
def test_empty_layer(self):
"""Test if we import an empty layer."""
layer = create_memory_layer(
'test', QgsWkbTypes.PolygonGeometry,
QgsCoordinateReferenceSystem(3857), [
QgsField('my_field_1', QVariant.Int),
QgsField('my_field_2', QVariant.Double),
QgsField('my_field_3', QVariant.String)
])
self.assertTrue(layer.isValid())
self.assertEqual(len(layer.fields()), 3)
# These following tests doesn't work if we add 'geosjon' in the formats
# list. https://issues.qgis.org/issues/18370
formats = ['shp']
for extension in formats:
path = QDir(mkdtemp())
data_store = Folder(path)
data_store.default_vector_format = extension
name = 'test'
result, message = data_store.add_layer(layer, name)
self.assertTrue(result, message)
# Fetch the layer
imported_layer = data_store.layer(name)
self.assertTrue(imported_layer.isValid())
self.assertListEqual([f.name() for f in imported_layer.fields()],
['my_field_1', 'my_field_2', 'my_field_3'])
def rasterize_vector_layer(layer, width, height, extent):
"""Rasterize a vector layer to the grid given by extent and width/height.
:param layer: The vector layer.
:type layer: QgsVectorLayer
:param width: The width of the output.
:type width: int
:param height: The height of the output.
:type height: int
:param extent: The extent to use.
:type extent: QgsRectangle
:return: The new raster layer.
:rtype: QgsRasterLayer
"""
name = rasterize_steps['gdal_layer_name']
output_filename = unique_filename(prefix=name, suffix='.tif')
extent_str = '%f,%f,%f,%f' % (extent.xMinimum(), extent.xMaximum(),
extent.yMinimum(), extent.yMaximum())
keywords = dict(layer.keywords)
# The layer is in memory, we need to save it to a file for Processing.
data_store = Folder(mkdtemp())
data_store.default_vector_format = 'geojson'
result = data_store.add_layer(layer, 'vector_layer')
layer = data_store.layer(result[1])
assert layer.isValid()
field = layer.keywords['inasafe_fields'][aggregation_id_field['key']]
# ET 21/02/17. I got some issues using rasterize algorithm from Processing.
# I keep it in case of we need it later. Let's use gdal command line.
use_gdal_command_line = True
if use_gdal_command_line:
startupinfo = None
if sys.platform == 'win32':
# On windows, we don't want to display the bash shell.
# https://github.com/inasafe/inasafe/issues/3980
startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
commands = [which('gdal_rasterize')[0]]
commands += ['-a', field]
commands += ['-ts', str(width), str(height)]
commands += ['-ot', 'Int16']
commands += ['-a_nodata', "'-1'"]
commands += [layer.source(), output_filename]
LOGGER.info(' '.join(commands))
result = subprocess.check_call(commands, startupinfo=startupinfo)
LOGGER.info('Result : %s' % result)
else:
parameters = dict()
parameters['INPUT'] = layer
parameters['FIELD'] = field
parameters['DIMENSIONS'] = 0 # output size is given in pixels
parameters['WIDTH'] = width
parameters['HEIGHT'] = height
parameters['RASTER_EXT'] = extent_str
parameters['TFW'] = False # force generation of ESRI TFW
parameters['RTYPE'] = 1 # raster type: Int16
parameters['NO_DATA'] = '-1' # nodata value
parameters['COMPRESS'] = 4 # GeoTIFF compression: DEFLATE
parameters['JPEGCOMPRESSION'] = 75 # JPEG compression level: 75
parameters['ZLEVEL'] = 6 # DEFLATE compression level
parameters['PREDICTOR'] = 1 # predictor for JPEG/DEFLATE
parameters['TILED'] = False # Tiled GeoTIFF?
parameters['BIGTIFF'] = 0 # whether to make big TIFF
parameters['EXTRA'] = '' # additional creation parameters
parameters['OUTPUT'] = output_filename
result = runalg('gdalogr:rasterize', parameters)
if result is None:
# Let's try be removing a new parameter added between 2.14 and 2.16
del parameters['RASTER_EXT']
result = runalg('gdalogr:rasterize', parameters)
assert result is not None
layer_aligned = QgsRasterLayer(output_filename, name, 'gdal')
assert layer_aligned.isValid()
layer_aligned.keywords = keywords
layer_aligned.keywords['title'] = (rasterize_steps['output_layer_name'] %
'aggregation')
layer_aligned.keywords['layer_purpose'] = (
layer_purpose_aggregation_summary['key'])
del layer_aligned.keywords['inasafe_fields']
check_layer(layer_aligned)
return layer_aligned
class MultiBufferDialog(QtWidgets.QDialog, FORM_CLASS):
"""Dialog implementation class for the InaSAFE multi buffer tool."""
def __init__(self, parent=None, iface=None, dock_widget=None):
"""Constructor for the multi buffer dialog.
:param parent: Parent widget of this dialog.
:type parent: QWidget
"""
QtWidgets.QDialog.__init__(self, parent)
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE Multi Buffer Tool'))
icon = resources_path('img', 'icons', 'show-multi-buffer.svg')
self.setWindowIcon(QtGui.QIcon(icon))
self.parent = parent
self.iface = iface
self.dock_widget = dock_widget
self.keyword_wizard = None
# output file properties initialisation
self.data_store = None
self.output_directory = None
self.output_filename = None
self.output_extension = None
self.output_layer = None
self.classification = []
# set icon
self.add_class_button.setIcon(
QIcon(resources_path('img', 'icons', 'add.svg')))
self.remove_class_button.setIcon(
QIcon(resources_path('img', 'icons', 'remove.svg')))
# prepare dialog initialisation
self.layer.setFilters(QgsMapLayerProxyModel.VectorLayer)
self.directory_button_status()
self.add_class_button_status()
self.ok_button_status()
self.output_form.setPlaceholderText(
self.tr('[Create a temporary layer]'))
self.keyword_wizard_checkbox.setChecked(True)
# set signal
self.layer.layerChanged.connect(self.directory_button_status)
self.layer.layerChanged.connect(self.ok_button_status)
self.output_form.textChanged.connect(self.ok_button_status)
self.directory_button.clicked.connect(
self.on_directory_button_tool_clicked)
self.radius_form.valueChanged.connect(self.add_class_button_status)
self.class_form.textChanged.connect(self.add_class_button_status)
self.add_class_button.clicked.connect(
self.populate_hazard_classification)
self.add_class_button.clicked.connect(self.ok_button_status)
self.remove_class_button.clicked.connect(
self.remove_selected_classification)
self.remove_class_button.clicked.connect(self.ok_button_status)
# Set up things for context help
self.help_button = self.button_box.button(
QtWidgets.QDialogButtonBox.Help)
# Allow toggling the help button
self.help_button.setCheckable(True)
self.help_button.toggled.connect(self.help_toggled)
self.main_stacked_widget.setCurrentIndex(1)
# Fix for issue 1699 - cancel button does nothing
cancel_button = self.button_box.button(
QtWidgets.QDialogButtonBox.Cancel)
cancel_button.clicked.connect(self.reject)
# Fix ends
ok_button = self.button_box.button(QtWidgets.QDialogButtonBox.Ok)
ok_button.clicked.connect(self.accept)
def accept(self):
"""Process the layer for multi buffering and generate a new layer.
.. note:: This is called on OK click.
"""
# set parameter from dialog
input_layer = self.layer.currentLayer()
output_path = self.output_form.text()
radius = self.get_classification()
# monkey patch keywords so layer works on multi buffering function
input_layer.keywords = {'inasafe_fields': {}}
# run multi buffering
self.output_layer = multi_buffering(input_layer, radius)
# save output layer to data store and check whether user
# provide the output path.
if output_path:
self.output_directory, self.output_filename = (
os.path.split(output_path))
self.output_filename, self.output_extension = (os.path.splitext(
self.output_filename))
# if user do not provide the output path, create a temporary file.
else:
self.output_directory = temp_dir(sub_dir='work')
self.output_filename = (unique_filename(prefix='hazard_layer',
suffix='.geojson',
dir=self.output_directory))
self.output_filename = os.path.split(self.output_filename)[1]
self.output_filename, self.output_extension = (os.path.splitext(
self.output_filename))
self.data_store = Folder(self.output_directory)
if self.output_extension == '.shp':
self.data_store.default_vector_format = 'shp'
elif self.output_extension == '.geojson':
self.data_store.default_vector_format = 'geojson'
self.data_store.add_layer(self.output_layer, self.output_filename)
# add output layer to map canvas
self.output_layer = self.data_store.layer(self.output_filename)
QgsProject.instance().addMapLayers([self.output_layer])
self.iface.setActiveLayer(self.output_layer)
self.iface.zoomToActiveLayer()
self.done(QtWidgets.QDialog.Accepted)
if self.keyword_wizard_checkbox.isChecked():
self.launch_keyword_wizard()
@pyqtSlot() # prevents actions being handled twice
def on_directory_button_tool_clicked(self):
"""Autoconnect slot activated when directory button is clicked."""
# noinspection PyCallByClass,PyTypeChecker
# set up parameter from dialog
input_path = self.layer.currentLayer().source()
input_directory, self.output_filename = os.path.split(input_path)
file_extension = os.path.splitext(self.output_filename)[1]
self.output_filename = os.path.splitext(self.output_filename)[0]
# show Qt file directory dialog
output_path, __ = QtWidgets.QFileDialog.getSaveFileName(
self, self.tr('Output file'), '%s_multi_buffer%s' % (os.path.join(
input_directory, self.output_filename), file_extension),
'GeoJSON (*.geojson);;Shapefile (*.shp)')
# set selected path to the dialog
self.output_form.setText(output_path)
def get_output_from_input(self):
"""Populate output form with default output path based on input layer.
"""
input_path = self.layer.currentLayer().source()
output_path = (os.path.splitext(input_path)[0] + '_multi_buffer' +
os.path.splitext(input_path)[1])
self.output_form.setText(output_path)
def populate_hazard_classification(self):
"""Populate hazard classification on hazard class form."""
new_class = {
'value': self.radius_form.value(),
'name': self.class_form.text()
}
self.classification.append(new_class)
self.classification = sorted(self.classification,
key=itemgetter('value'))
self.hazard_class_form.clear()
for item in self.classification:
new_item = '{value} - {name}'.format(value=item['value'],
name=item['name'])
self.hazard_class_form.addItem(new_item)
self.radius_form.setValue(0)
self.class_form.clear()
self.ok_button_status()
def remove_selected_classification(self):
"""Remove selected item on hazard class form."""
removed_classes = self.hazard_class_form.selectedItems()
current_item = self.hazard_class_form.currentItem()
removed_index = self.hazard_class_form.indexFromItem(current_item)
del self.classification[removed_index.row()]
for item in removed_classes:
self.hazard_class_form.takeItem(self.hazard_class_form.row(item))
def get_classification(self):
"""Get all hazard class created by user.
:return: Hazard class definition created by user.
:rtype: OrderedDict
"""
classification_dictionary = {}
for item in self.classification:
classification_dictionary[item['value']] = item['name']
classification_dictionary = OrderedDict(
sorted(classification_dictionary.items()))
return classification_dictionary
def directory_button_status(self):
"""Function to enable or disable directory button."""
if self.layer.currentLayer():
self.directory_button.setEnabled(True)
else:
self.directory_button.setEnabled(False)
def add_class_button_status(self):
"""Function to enable or disable add class button."""
if self.class_form.text() and self.radius_form.value() >= 0:
self.add_class_button.setEnabled(True)
else:
self.add_class_button.setEnabled(False)
def ok_button_status(self):
"""Function to enable or disable OK button."""
if not self.layer.currentLayer():
self.button_box.button(
QtWidgets.QDialogButtonBox.Ok).setEnabled(False)
elif (self.hazard_class_form.count() > 0
and self.layer.currentLayer().name()
and len(self.output_form.text()) >= 0):
self.button_box.button(
QtWidgets.QDialogButtonBox.Ok).setEnabled(True)
else:
self.button_box.button(
QtWidgets.QDialogButtonBox.Ok).setEnabled(False)
@pyqtSlot(bool) # prevents actions being handled twice
def help_toggled(self, flag):
"""Show or hide the help tab in the stacked widget.
:param flag: Flag indicating whether help should be shown or hidden.
:type flag: bool
"""
if flag:
self.help_button.setText(self.tr('Hide Help'))
self.show_help()
else:
self.help_button.setText(self.tr('Show Help'))
self.hide_help()
def hide_help(self):
"""Hide the usage info from the user."""
self.main_stacked_widget.setCurrentIndex(1)
def show_help(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
self.main_stacked_widget.setCurrentIndex(0)
header = html_header()
footer = html_footer()
string = header
message = multi_buffer_help()
string += message.to_html()
string += footer
self.help_web_view.setHtml(string)
def launch_keyword_wizard(self):
"""Launch keyword creation wizard."""
# make sure selected layer is the output layer
if self.iface.activeLayer() != self.output_layer:
return
# launch wizard dialog
self.keyword_wizard = WizardDialog(self.iface.mainWindow(), self.iface,
self.dock_widget)
self.keyword_wizard.set_keywords_creation_mode(self.output_layer)
self.keyword_wizard.exec_() # modal
class MultiBufferDialog(QtGui.QDialog, FORM_CLASS):
"""Dialog implementation class for the InaSAFE multi buffer tool."""
def __init__(self, parent=None, iface=None, dock_widget=None):
"""Constructor for the multi buffer dialog.
:param parent: Parent widget of this dialog.
:type parent: QWidget
"""
QtGui.QDialog.__init__(self, parent)
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE Multi Buffer Tool'))
self.parent = parent
self.iface = iface
self.dock_widget = dock_widget
self.keyword_wizard = None
# output file properties initialisation
self.data_store = None
self.output_directory = None
self.output_filename = None
self.output_extension = None
self.output_layer = None
self.classification = []
# set icon
self.add_class_button.setIcon(
QIcon(resources_path('img', 'icons', 'add.svg')))
self.remove_class_button.setIcon(
QIcon(resources_path('img', 'icons', 'remove.svg')))
# prepare dialog initialisation
self.layer.setFilters(QgsMapLayerProxyModel.VectorLayer)
self.directory_button_status()
self.add_class_button_status()
self.ok_button_status()
self.output_form.setPlaceholderText(
self.tr('[Create a temporary layer]'))
self.keyword_wizard_checkbox.setChecked(True)
# set signal
self.layer.layerChanged.connect(self.directory_button_status)
self.layer.layerChanged.connect(self.ok_button_status)
self.output_form.textChanged.connect(self.ok_button_status)
self.directory_button.clicked.connect(
self.on_directory_button_tool_clicked)
self.radius_form.valueChanged.connect(self.add_class_button_status)
self.class_form.textChanged.connect(self.add_class_button_status)
self.add_class_button.clicked.connect(
self.populate_hazard_classification)
self.add_class_button.clicked.connect(self.ok_button_status)
self.remove_class_button.clicked.connect(
self.remove_selected_classification)
self.remove_class_button.clicked.connect(self.ok_button_status)
# Set up things for context help
self.help_button = self.button_box.button(QtGui.QDialogButtonBox.Help)
# Allow toggling the help button
self.help_button.setCheckable(True)
self.help_button.toggled.connect(self.help_toggled)
self.main_stacked_widget.setCurrentIndex(1)
# Fix for issue 1699 - cancel button does nothing
cancel_button = self.button_box.button(QtGui.QDialogButtonBox.Cancel)
cancel_button.clicked.connect(self.reject)
# Fix ends
ok_button = self.button_box.button(QtGui.QDialogButtonBox.Ok)
ok_button.clicked.connect(self.accept)
def accept(self):
"""Process the layer for multi buffering and generate a new layer.
.. note:: This is called on OK click.
"""
# set parameter from dialog
input_layer = self.layer.currentLayer()
output_path = self.output_form.text()
radius = self.get_classification()
# monkey patch keywords so layer works on multi buffering function
input_layer.keywords = {'inasafe_fields': {}}
# run multi buffering
self.output_layer = multi_buffering(input_layer, radius)
# save output layer to data store and check whether user
# provide the output path.
if output_path:
self.output_directory, self.output_filename = (
os.path.split(output_path))
self.output_filename, self.output_extension = (
os.path.splitext(self.output_filename))
# if user do not provide the output path, create a temporary file.
else:
self.output_directory = temp_dir(sub_dir='work')
self.output_filename = (
unique_filename(
prefix='hazard_layer',
suffix='.geojson',
dir=self.output_directory))
self.output_filename = os.path.split(self.output_filename)[1]
self.output_filename, self.output_extension = (
os.path.splitext(self.output_filename))
self.data_store = Folder(self.output_directory)
if self.output_extension == '.shp':
self.data_store.default_vector_format = 'shp'
elif self.output_extension == '.geojson':
self.data_store.default_vector_format = 'geojson'
self.data_store.add_layer(self.output_layer, self.output_filename)
# add output layer to map canvas
self.output_layer = self.data_store.layer(self.output_filename)
QgsMapLayerRegistry.instance().addMapLayers(
[self.output_layer])
self.iface.setActiveLayer(self.output_layer)
self.iface.zoomToActiveLayer()
self.done(QtGui.QDialog.Accepted)
if self.keyword_wizard_checkbox.isChecked():
self.launch_keyword_wizard()
@pyqtSignature('') # prevents actions being handled twice
def on_directory_button_tool_clicked(self):
"""Autoconnect slot activated when directory button is clicked."""
# noinspection PyCallByClass,PyTypeChecker
# set up parameter from dialog
input_path = self.layer.currentLayer().source()
input_directory, self.output_filename = os.path.split(input_path)
file_extension = os.path.splitext(self.output_filename)[1]
self.output_filename = os.path.splitext(self.output_filename)[0]
# show Qt file directory dialog
output_path = QFileDialog.getSaveFileName(
self,
self.tr('Output file'),
'%s_multi_buffer%s' % (
os.path.join(input_directory, self.output_filename),
file_extension),
'GeoJSON (*.geojson);;Shapefile (*.shp)')
# set selected path to the dialog
self.output_form.setText(output_path)
def get_output_from_input(self):
"""Populate output form with default output path based on input layer.
"""
input_path = self.layer.currentLayer().source()
output_path = (
os.path.splitext(input_path)[0] + '_multi_buffer' +
os.path.splitext(input_path)[1])
self.output_form.setText(output_path)
def populate_hazard_classification(self):
"""Populate hazard classification on hazard class form."""
new_class = {
'value': self.radius_form.value(),
'name': self.class_form.text()}
self.classification.append(new_class)
self.classification = sorted(
self.classification, key=itemgetter('value'))
self.hazard_class_form.clear()
for item in self.classification:
new_item = '{value} - {name}'.format(
value=item['value'], name=item['name'])
self.hazard_class_form.addItem(new_item)
self.radius_form.setValue(0)
self.class_form.clear()
self.ok_button_status()
def remove_selected_classification(self):
"""Remove selected item on hazard class form."""
removed_classes = self.hazard_class_form.selectedItems()
current_item = self.hazard_class_form.currentItem()
removed_index = self.hazard_class_form.indexFromItem(current_item)
del self.classification[removed_index.row()]
for item in removed_classes:
self.hazard_class_form.takeItem(
self.hazard_class_form.row(item))
def get_classification(self):
"""Get all hazard class created by user.
:return: Hazard class definition created by user.
:rtype: OrderedDict
"""
classification_dictionary = {}
for item in self.classification:
classification_dictionary[item['value']] = item['name']
classification_dictionary = OrderedDict(
sorted(classification_dictionary.items()))
return classification_dictionary
def directory_button_status(self):
"""Function to enable or disable directory button."""
if self.layer.currentLayer():
self.directory_button.setEnabled(True)
else:
self.directory_button.setEnabled(False)
def add_class_button_status(self):
"""Function to enable or disable add class button."""
if self.class_form.text() and self.radius_form >= 0:
self.add_class_button.setEnabled(True)
else:
self.add_class_button.setEnabled(False)
def ok_button_status(self):
"""Function to enable or disable OK button."""
if not self.layer.currentLayer():
self.button_box.button(QtGui.QDialogButtonBox.Ok).setEnabled(False)
elif (self.hazard_class_form.count() > 0 and
self.layer.currentLayer().name() and
len(self.output_form.text()) >= 0):
self.button_box.button(QtGui.QDialogButtonBox.Ok).setEnabled(True)
else:
self.button_box.button(QtGui.QDialogButtonBox.Ok).setEnabled(False)
@pyqtSlot()
@pyqtSignature('bool') # prevents actions being handled twice
def help_toggled(self, flag):
"""Show or hide the help tab in the stacked widget.
:param flag: Flag indicating whether help should be shown or hidden.
:type flag: bool
"""
if flag:
self.help_button.setText(self.tr('Hide Help'))
self.show_help()
else:
self.help_button.setText(self.tr('Show Help'))
self.hide_help()
def hide_help(self):
"""Hide the usage info from the user."""
self.main_stacked_widget.setCurrentIndex(1)
def show_help(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
self.main_stacked_widget.setCurrentIndex(0)
header = html_header()
footer = html_footer()
string = header
message = multi_buffer_help()
string += message.to_html()
string += footer
self.help_web_view.setHtml(string)
def launch_keyword_wizard(self):
"""Launch keyword creation wizard."""
# make sure selected layer is the output layer
if self.iface.activeLayer() != self.output_layer:
return
# launch wizard dialog
self.keyword_wizard = WizardDialog(
self.iface.mainWindow(),
self.iface,
self.dock_widget)
self.keyword_wizard.set_keywords_creation_mode(self.output_layer)
self.keyword_wizard.exec_() # modal
def rasterize_vector_layer(layer, width, height, extent):
"""Rasterize a vector layer to the grid given by extent and width/height.
:param layer: The vector layer.
:type layer: QgsVectorLayer
:param width: The width of the output.
:type width: int
:param height: The height of the output.
:type height: int
:param extent: The extent to use.
:type extent: QgsRectangle
:return: The new raster layer.
:rtype: QgsRasterLayer
"""
name = rasterize_steps['gdal_layer_name']
output_filename = unique_filename(prefix=name, suffix='.tif')
extent_str = '%f,%f,%f,%f' % (
extent.xMinimum(),
extent.xMaximum(),
extent.yMinimum(),
extent.yMaximum())
keywords = dict(layer.keywords)
# The layer is in memory, we need to save it to a file for Processing.
data_store = Folder(mkdtemp())
data_store.default_vector_format = 'geojson'
result = data_store.add_layer(layer, 'vector_layer')
layer = data_store.layer(result[1])
assert layer.isValid()
field = layer.keywords['inasafe_fields'][aggregation_id_field['key']]
# ET 21/02/17. I got some issues using rasterize algorithm from Processing.
# I keep it in case of we need it later. Let's use gdal command line.
use_gdal_command_line = True
if use_gdal_command_line:
startupinfo = None
if sys.platform == 'win32':
# On windows, we don't want to display the bash shell.
# https://github.com/inasafe/inasafe/issues/3980
startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
commands = [which('gdal_rasterize')[0]]
commands += ['-a', field]
commands += ['-ts', str(width), str(height)]
commands += ['-ot', 'Int16']
commands += ['-a_nodata', "'-1'"]
commands += [layer.source(), output_filename]
LOGGER.info(' '.join(commands))
result = subprocess.check_call(commands, startupinfo=startupinfo)
LOGGER.info('Result : %s' % result)
else:
parameters = dict()
parameters['INPUT'] = layer
parameters['FIELD'] = field
parameters['DIMENSIONS'] = 0 # output size is given in pixels
parameters['WIDTH'] = width
parameters['HEIGHT'] = height
parameters['RASTER_EXT'] = extent_str
parameters['TFW'] = False # force generation of ESRI TFW
parameters['RTYPE'] = 1 # raster type: Int16
parameters['NO_DATA'] = '-1' # nodata value
parameters['COMPRESS'] = 4 # GeoTIFF compression: DEFLATE
parameters['JPEGCOMPRESSION'] = 75 # JPEG compression level: 75
parameters['ZLEVEL'] = 6 # DEFLATE compression level
parameters['PREDICTOR'] = 1 # predictor for JPEG/DEFLATE
parameters['TILED'] = False # Tiled GeoTIFF?
parameters['BIGTIFF'] = 0 # whether to make big TIFF
parameters['EXTRA'] = '' # additional creation parameters
parameters['OUTPUT'] = output_filename
result = runalg('gdalogr:rasterize', parameters)
if result is None:
# Let's try be removing a new parameter added between 2.14 and 2.16
del parameters['RASTER_EXT']
result = runalg('gdalogr:rasterize', parameters)
assert result is not None
layer_aligned = QgsRasterLayer(output_filename, name, 'gdal')
assert layer_aligned.isValid()
layer_aligned.keywords = keywords
layer_aligned.keywords['title'] = (
rasterize_steps['output_layer_name'] % 'aggregation')
layer_aligned.keywords['layer_purpose'] = (
layer_purpose_aggregation_summary['key'])
del layer_aligned.keywords['inasafe_fields']
check_layer(layer_aligned)
return layer_aligned