def process(self):
self.count = 0
if not os.path.exists(self.outputDir):
qm = QtGui.QMessageBox
ret = qm.question(self,'Create Directory?', "Output directory does not exist. Create?", qm.Yes | qm.No)
if ret == qm.Yes:
os.makedirs(self.outputDir)
total2Proc = 100
progress = QProgressDialog("Generating Adaptive Light Source Vectors. This can take approx. 5-15 mins.", "Abort", 0, total2Proc, self);
progress.setWindowTitle("Generate AdaptiveLSV")
progress.setWindowModality(QtCore.Qt.WindowModal);
progress.show()
QtGui.QApplication.processEvents()
time.sleep(0.1)
try:
LSAdaptedi, LSAdapted, fname = self.genAdaptiveLSVectors(progress)
progress.setValue(total2Proc);
progress.cancel()
qm = QtGui.QMessageBox
qm.information(self,'Completed', 'Results can be found in {}\\{}.'.format(self.outputDir, fname))
except Exception as e:
progress.cancel()
qm = QtGui.QMessageBox
qm.information(self,'Error', '{}'.format(e))
raise e
def process(self):
startFolder = os.path.normpath(
os.path.join(self.rootDir, str(self.startDir)))
endFolder = os.path.normpath(
os.path.join(self.rootDir, str(self.endDir)))
d = glob.glob(os.path.join(self.rootDir, self.getLSType()))
d.sort()
d = [os.path.normpath(p) for p in d]
if startFolder:
startIdx = d.index(startFolder)
endIdx = d.index(endFolder)
d = d[startIdx:endIdx + 1]
total2Proc = len(d)
progress = QProgressDialog("Generating results...", "Abort", 0,
total2Proc, self)
progress.setWindowTitle("Batch Process")
progress.setWindowModality(QtCore.Qt.WindowModal)
try:
if self.useAdaptivePS:
pth2AdaptiveLSi = self.adaptiveLSVFile
self.psNSourceAdaptiveBatch(
d,
pth2AdaptiveLSi,
self.getLSType(),
overrideLightingMode=self.getOverrideLSType(),
progressBar=progress)
progress.setValue(total2Proc)
qm = QtGui.QMessageBox
qm.information(
self, 'Completed',
'SNZShadowImAndAlbedo_adaptiveLS.npz files created.')
else:
self.psNSourceBatch(d, progressBar=progress)
progress.setValue(total2Proc)
qm = QtGui.QMessageBox
qm.information(self, 'Completed',
'SNZShadowImAndAlbedo.npz files created.')
except Exception as e:
progress.cancel()
qm = QtGui.QMessageBox
qm.information(self, 'Error', '{}'.format(e))
raise e
def process(self):
dirs = sorted(glob.glob(self.rootDir + '\\*_mask*'))
total2Proc = 100
progress = QProgressDialog("Tracking leaves...", "Abort", 0,
total2Proc, self)
progress.setWindowTitle("Batch Process")
progress.setWindowModality(QtCore.Qt.WindowModal)
try:
self.particleTracker(dirs, progressBar=progress)
progress.setValue(total2Proc)
qm = QtGui.QMessageBox
qm.information(self, 'Completed', 'Leaf labels were changed.')
except Exception as e:
progress.cancel()
qm = QtGui.QMessageBox
qm.information(self, 'Error', '{}'.format(e))
raise e
class OsmDownloaderDialog(QDialog, FORM_CLASS):
"""Downloader for OSM data."""
def __init__(self, parent=None, iface=None):
"""Constructor for import dialog.
:param parent: Optional widget to use as parent
:type parent: QWidget
:param iface: An instance of QGisInterface
:type iface: QGisInterface
"""
QDialog.__init__(self, parent)
self.parent = parent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = iface
self.buildings_url = 'http://osm.linfiniti.com/buildings-shp'
self.building_points_url = \
'http://osm.linfiniti.com/building-points-shp'
self.roads_url = 'http://osm.linfiniti.com/roads-shp'
self.help_context = 'openstreetmap_downloader'
# creating progress dialog for download
self.progress_dialog = QProgressDialog(self)
self.progress_dialog.setAutoClose(False)
title = self.tr('InaSAFE OpenStreetMap Downloader')
self.progress_dialog.setWindowTitle(title)
# Set up context help
help_button = self.button_box.button(QtGui.QDialogButtonBox.Help)
help_button.clicked.connect(self.show_help)
self.show_info()
# set up the validator for the file name prefix
expression = QRegExp('^[A-Za-z0-9-_]*$')
validator = QRegExpValidator(expression, self.filename_prefix)
self.filename_prefix.setValidator(validator)
# Set Proxy in webpage
proxy = get_proxy()
self.network_manager = QNetworkAccessManager(self)
if proxy is not None:
self.network_manager.setProxy(proxy)
self.restore_state()
# Setup the rectangle map tool
self.canvas = iface.mapCanvas()
self.rectangle_map_tool = \
RectangleMapTool(self.canvas)
self.rectangle_map_tool.rectangle_created.connect(
self.update_extent_from_rectangle)
self.button_extent_rectangle.clicked.connect(
self.drag_rectangle_on_map_canvas)
# Setup pan tool
self.pan_tool = QgsMapToolPan(self.canvas)
self.canvas.setMapTool(self.pan_tool)
self.update_extent_from_map_canvas()
def show_info(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
header = html_header()
footer = html_footer()
string = header
heading = m.Heading(self.tr('OSM Downloader'), **INFO_STYLE)
body = self.tr(
'This tool will fetch building (\'structure\') or road ('
'\'highway\') data from the OpenStreetMap project for you. '
'The downloaded data will have InaSAFE keywords defined and a '
'default QGIS style applied. To use this tool effectively:'
)
tips = m.BulletedList()
tips.add(self.tr(
'Your current extent, when opening this window, will be used to '
'determine the area for which you want data to be retrieved.'
'You can interactively select the area by using the '
'\'select on map\' button - which will temporarily hide this '
'window and allow you to drag a rectangle on the map. After you '
'have finished dragging the rectangle, this window will '
'reappear.'))
tips.add(self.tr(
'Check the output directory is correct. Note that the saved '
'dataset will be called either roads.shp or buildings.shp (and '
'associated files).'
))
tips.add(self.tr(
'By default simple file names will be used (e.g. roads.shp, '
'buildings.shp). If you wish you can specify a prefix to '
'add in front of this default name. For example using a prefix '
'of \'padang-\' will cause the downloaded files to be saved as '
'\'padang-roads.shp\' and \'padang-buildings.shp\'. Note that '
'the only allowed prefix characters are A-Z, a-z, 0-9 and the '
'characters \'-\' and \'_\'. You can leave this blank if you '
'prefer.'
))
tips.add(self.tr(
'If a dataset already exists in the output directory it will be '
'overwritten.'
))
tips.add(self.tr(
'This tool requires a working internet connection and fetching '
'buildings or roads will consume your bandwidth.'))
tips.add(m.Link(
'http://www.openstreetmap.org/copyright',
text=self.tr(
'Downloaded data is copyright OpenStreetMap contributors'
' (click for more info).')
))
message = m.Message()
message.add(heading)
message.add(body)
message.add(tips)
string += message.to_html()
string += footer
self.web_view.setHtml(string)
def restore_state(self):
""" Read last state of GUI from configuration file."""
settings = QSettings()
try:
last_path = settings.value('directory', type=str)
except TypeError:
last_path = ''
self.output_directory.setText(last_path)
def save_state(self):
""" Store current state of GUI to configuration file """
settings = QSettings()
settings.setValue('directory', self.output_directory.text())
def show_help(self):
"""Load the help text for the dialog."""
show_context_help(self.help_context)
def update_extent(self, extent):
"""Update extent value in GUI based from an extent.
:param extent: A list in the form [xmin, ymin, xmax, ymax] where all
coordinates provided are in Geographic / EPSG:4326.
:type extent: list
"""
self.min_longitude.setText(str(extent[0]))
self.min_latitude.setText(str(extent[1]))
self.max_longitude.setText(str(extent[2]))
self.max_latitude.setText(str(extent[3]))
def update_extent_from_map_canvas(self):
"""Update extent value in GUI based from value in map.
.. note:: Delegates to update_extent()
"""
self.groupBox.setTitle(self.tr('Bounding box from the map canvas'))
# Get the extent as [xmin, ymin, xmax, ymax]
extent = viewport_geo_array(self.iface.mapCanvas())
self.update_extent(extent)
def update_extent_from_rectangle(self):
"""Update extent value in GUI based from the QgsMapTool rectangle.
.. note:: Delegates to update_extent()
"""
self.show()
self.canvas.unsetMapTool(self.rectangle_map_tool)
self.canvas.setMapTool(self.pan_tool)
rectangle = self.rectangle_map_tool.rectangle()
if rectangle:
self.groupBox.setTitle(self.tr('Bounding box from rectangle'))
extent = rectangle_geo_array(rectangle, self.iface.mapCanvas())
self.update_extent(extent)
def validate_extent(self):
"""Validate the bounding box before user click OK to download.
:return: True if the bounding box is valid, otherwise False
:rtype: bool
"""
min_latitude = float(str(self.min_latitude.text()))
max_latitude = float(str(self.max_latitude.text()))
min_longitude = float(str(self.min_longitude.text()))
max_longitude = float(str(self.max_longitude.text()))
# min_latitude < max_latitude
if min_latitude >= max_latitude:
return False
# min_longitude < max_longitude
if min_longitude >= max_longitude:
return False
# -90 <= latitude <= 90
if min_latitude < -90 or min_latitude > 90:
return False
if max_latitude < -90 or max_latitude > 90:
return False
# -180 <= longitude <= 180
if min_longitude < -180 or min_longitude > 180:
return False
if max_longitude < -180 or max_longitude > 180:
return False
return True
@pyqtSignature('') # prevents actions being handled twice
def on_directory_button_clicked(self):
"""Show a dialog to choose directory."""
# noinspection PyCallByClass,PyTypeChecker
self.output_directory.setText(QFileDialog.getExistingDirectory(
self, self.tr('Select download directory')))
def drag_rectangle_on_map_canvas(self):
"""Hide the dialog and allow the user to draw a rectangle."""
self.hide()
self.rectangle_map_tool.reset()
self.canvas.unsetMapTool(self.pan_tool)
self.canvas.setMapTool(self.rectangle_map_tool)
def accept(self):
"""Do osm download and display it in QGIS."""
error_dialog_title = self.tr('InaSAFE OpenStreetMap Downloader Error')
# Lock the groupbox
self.groupBox.setDisabled(True)
# Validate extent
valid_flag = self.validate_extent()
if not valid_flag:
message = self.tr(
'The bounding box is not valid. Please make sure it is '
'valid or check your projection!')
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(self, error_dialog_title, message)
# Unlock the groupbox
self.groupBox.setEnabled(True)
return
# Get all the feature types
index = self.feature_type.currentIndex()
if index == 0:
feature_types = ['buildings', 'roads', 'building-points']
elif index == 1:
feature_types = ['buildings']
elif index == 2:
feature_types = ['building-points']
else:
feature_types = ['roads']
try:
self.save_state()
self.require_directory()
for feature_type in feature_types:
output_directory = self.output_directory.text()
output_prefix = self.filename_prefix.text()
overwrite = self.overwrite_checkBox.isChecked()
output_base_file_path = self.get_output_base_path(
output_directory, output_prefix, feature_type, overwrite)
self.download(feature_type, output_base_file_path)
try:
self.load_shapefile(feature_type, output_base_file_path)
except FileMissingError as exception:
display_warning_message_box(
self,
error_dialog_title,
exception.message)
self.done(QDialog.Accepted)
self.rectangle_map_tool.reset()
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as exception: # pylint: disable=broad-except
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(
self, error_dialog_title, exception.message)
self.progress_dialog.cancel()
finally:
# Unlock the groupbox
self.groupBox.setEnabled(True)
def get_output_base_path(
self,
output_directory,
output_prefix,
feature_type,
overwrite):
"""Get a full base name path to save the shapefile.
:param output_directory: The directory where to put results.
:type output_directory: str
:param output_prefix: The prefix to add for the shapefile.
:type output_prefix: str
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param overwrite: Boolean to know if we can overwrite existing files.
:type overwrite: bool
:return: The base path.
:rtype: str
"""
path = os.path.join(
output_directory, '%s%s' % (output_prefix, feature_type))
if overwrite:
# If a shapefile exists, we must remove it (only the .shp)
shp = '%s.shp' % path
if os.path.isfile(shp):
os.remove(shp)
else:
separator = '-'
suffix = self.get_unique_file_path_suffix(
'%s.shp' % path, separator)
if suffix:
path = os.path.join(output_directory, '%s%s%s%s' % (
output_prefix, feature_type, separator, suffix))
return path
@staticmethod
def get_unique_file_path_suffix(file_path, separator='-', i=0):
"""Return the minimum number to suffix the file to not overwrite one.
Example : /tmp/a.txt exists.
- With file_path='/tmp/b.txt' will return 0.
- With file_path='/tmp/a.txt' will return 1 (/tmp/a-1.txt)
:param file_path: The file to check.
:type file_path: str
:param separator: The separator to add before the prefix.
:type separator: str
:param i: The minimum prefix to check.
:type i: int
:return: The minimum prefix you should add to not overwrite a file.
:rtype: int
"""
basename = os.path.splitext(file_path)
if i != 0:
file_path_test = os.path.join(
'%s%s%s%s' % (basename[0], separator, i, basename[1]))
else:
file_path_test = file_path
if os.path.isfile(file_path_test):
return OsmDownloaderDialog.get_unique_file_path_suffix(
file_path, separator, i + 1)
else:
return i
def require_directory(self):
"""Ensure directory path entered in dialog exist.
When the path does not exist, this function will ask the user if he
want to create it or not.
:raises: CanceledImportDialogError - when user choose 'No' in
the question dialog for creating directory.
"""
path = self.output_directory.text()
if os.path.exists(path):
return
title = self.tr('Directory %s not exist') % path
question = self.tr(
'Directory %s not exist. Do you want to create it?') % path
# noinspection PyCallByClass,PyTypeChecker
answer = QMessageBox.question(
self, title, question, QMessageBox.Yes | QMessageBox.No)
if answer == QMessageBox.Yes:
if len(path) != 0:
os.makedirs(path)
else:
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(
self,
self.tr('InaSAFE error'),
self.tr('Output directory can not be empty.'))
raise CanceledImportDialogError()
else:
raise CanceledImportDialogError()
def download(self, feature_type, output_base_path):
"""Download shapefiles from Kartoza server.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param output_base_path: The base path of the shape file.
:type output_base_path: str
:raises: ImportDialogError, CanceledImportDialogError
"""
# preparing necessary data
min_longitude = str(self.min_longitude.text())
min_latitude = str(self.min_latitude.text())
max_longitude = str(self.max_longitude.text())
max_latitude = str(self.max_latitude.text())
box = (
'{min_longitude},{min_latitude},{max_longitude},'
'{max_latitude}').format(
min_longitude=min_longitude,
min_latitude=min_latitude,
max_longitude=max_longitude,
max_latitude=max_latitude
)
if feature_type == 'buildings':
url = '{url}?bbox={box}&qgis_version=2'.format(
url=self.buildings_url, box=box)
elif feature_type == 'building-points':
url = '{url}?bbox={box}&qgis_version=2'.format(
url=self.building_points_url, box=box)
else:
url = '{url}?bbox={box}&qgis_version=2'.format(
url=self.roads_url, box=box)
if 'LANG' in os.environ:
env_lang = os.environ['LANG']
url += '&lang=%s' % env_lang
path = tempfile.mktemp('.shp.zip')
# download and extract it
self.fetch_zip(url, path, feature_type)
self.extract_zip(path, output_base_path)
self.progress_dialog.done(QDialog.Accepted)
def fetch_zip(self, url, output_path, feature_type):
"""Download zip containing shp file and write to output_path.
:param url: URL of the zip bundle.
:type url: str
:param output_path: Path of output file,
:type output_path: str
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:raises: ImportDialogError - when network error occurred
"""
LOGGER.debug('Downloading file from URL: %s' % url)
LOGGER.debug('Downloading to: %s' % output_path)
self.progress_dialog.show()
# Infinite progress bar when the server is fetching data.
# The progress bar will be updated with the file size later.
self.progress_dialog.setMaximum(0)
self.progress_dialog.setMinimum(0)
self.progress_dialog.setValue(0)
# Get a pretty label from feature_type, but not translatable
label_feature_type = feature_type.replace('-', ' ')
label_text = self.tr('Fetching %s' % label_feature_type)
self.progress_dialog.setLabelText(label_text)
# Download Process
downloader = FileDownloader(
self.network_manager, url, output_path, self.progress_dialog)
try:
result = downloader.download()
except IOError as ex:
raise IOError(ex)
if result[0] is not True:
_, error_message = result
if result[0] == QNetworkReply.OperationCanceledError:
raise CanceledImportDialogError(error_message)
else:
raise DownloadError(error_message)
@staticmethod
def extract_zip(zip_path, destination_base_path):
"""Extract different extensions to the destination base path.
Example : test.zip contains a.shp, a.dbf, a.prj
and destination_base_path = '/tmp/CT-buildings
Expected result :
- /tmp/CT-buildings.shp
- /tmp/CT-buildings.dbf
- /tmp/CT-buildings.prj
If two files in the zip with the same extension, only one will be
copied.
:param zip_path: The path of the .zip file
:type zip_path: str
:param destination_base_path: The destination base path where the shp
will be written to.
:type destination_base_path: str
:raises: IOError - when not able to open path or output_dir does not
exist.
"""
import zipfile
handle = open(zip_path, 'rb')
zip_file = zipfile.ZipFile(handle)
for name in zip_file.namelist():
extension = os.path.splitext(name)[1]
output_final_path = u'%s%s' % (destination_base_path, extension)
output_file = open(output_final_path, 'wb')
output_file.write(zip_file.read(name))
output_file.close()
handle.close()
def load_shapefile(self, feature_type, base_path):
"""Load downloaded shape file to QGIS Main Window.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param base_path: The base path of the shape file (without extension).
:type base_path: str
:raises: FileMissingError - when buildings.shp not exist
"""
path = '%s.shp' % base_path
if not os.path.exists(path):
message = self.tr(
'%s does not exist. The server does not have any data for '
'this extent.' % path)
raise FileMissingError(message)
self.iface.addVectorLayer(path, feature_type, 'ogr')
canvas_srid = self.canvas.mapRenderer().destinationCrs().srsid()
on_the_fly_projection = self.canvas.hasCrsTransformEnabled()
if canvas_srid != 4326 and not on_the_fly_projection:
if QGis.QGIS_VERSION_INT >= 20400:
self.canvas.setCrsTransformEnabled(True)
else:
display_warning_message_bar(
self.tr('Enable \'on the fly\''),
self.tr(
'Your current projection is different than EPSG:4326. '
'You should enable \'on the fly\' to display '
'correctly your layers')
)
def reject(self):
"""Redefinition of the reject() method
to remove the rectangle selection tool.
It will call the super method.
"""
self.canvas.unsetMapTool(self.rectangle_map_tool)
self.rectangle_map_tool.reset()
super(OsmDownloaderDialog, self).reject()
class OsmDownloaderDialog(QDialog, FORM_CLASS):
"""Downloader for OSM data."""
def __init__(self, parent=None, iface=None):
"""Constructor for import dialog.
:param parent: Optional widget to use as parent
:type parent: QWidget
:param iface: An instance of QGisInterface
:type iface: QGisInterface
"""
QDialog.__init__(self, parent)
self.parent = parent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = iface
self.help_context = 'openstreetmap_downloader'
# creating progress dialog for download
self.progress_dialog = QProgressDialog(self)
self.progress_dialog.setAutoClose(False)
title = self.tr('InaSAFE OpenStreetMap Downloader')
self.progress_dialog.setWindowTitle(title)
# 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)
# Disable boundaries group box until boundary checkbox is ticked
self.boundary_group.setEnabled(False)
# set up the validator for the file name prefix
expression = QRegExp('^[A-Za-z0-9-_]*$')
validator = QRegExpValidator(expression, self.filename_prefix)
self.filename_prefix.setValidator(validator)
self.restore_state()
# Setup the rectangle map tool
self.canvas = iface.mapCanvas()
self.rectangle_map_tool = \
RectangleMapTool(self.canvas)
self.rectangle_map_tool.rectangle_created.connect(
self.update_extent_from_rectangle)
self.capture_button.clicked.connect(self.drag_rectangle_on_map_canvas)
# Setup pan tool
self.pan_tool = QgsMapToolPan(self.canvas)
self.canvas.setMapTool(self.pan_tool)
# Setup helper for admin_level
json_file_path = resources_path('osm', 'admin_level_per_country.json')
if os.path.isfile(json_file_path):
self.countries = json.load(open(json_file_path))
self.bbox_countries = None
self.populate_countries()
# connect
self.country_comboBox.currentIndexChanged.connect(
self.update_helper_political_level)
self.admin_level_comboBox.currentIndexChanged.connect(
self.update_helper_political_level)
self.update_extent_from_map_canvas()
def update_helper_political_level(self):
"""To update the helper about the country and the admin_level."""
current_country = self.country_comboBox.currentText()
index = self.admin_level_comboBox.currentIndex()
current_level = self.admin_level_comboBox.itemData(index)
content = None
try:
content = \
self.countries[current_country]['levels'][str(current_level)]
if content == 'N/A' or content == 'fixme' or content == '':
raise KeyError
except KeyError:
content = self.tr('undefined')
finally:
text = self.tr('which represents %s in') % content
self.boundary_helper.setText(text)
def populate_countries(self):
"""Populate the combobox about countries and levels."""
for i in range(1, 12):
self.admin_level_comboBox.addItem(self.tr('Level %s') % i, i)
# Set current index to admin_level 8, the most common one
self.admin_level_comboBox.setCurrentIndex(7)
list_countries = [
self.tr(country) for country in self.countries.keys()
]
list_countries.sort()
for country in list_countries:
self.country_comboBox.addItem(country)
self.bbox_countries = {}
for country in list_countries:
multipolygons = self.countries[country]['bbox']
self.bbox_countries[country] = []
for coords in multipolygons:
bbox = QgsRectangle(coords[0], coords[3], coords[2], coords[1])
self.bbox_countries[country].append(bbox)
self.update_helper_political_level()
@pyqtSlot()
@pyqtSignature('bool') # prevents actions being handled twice
def help_toggled(self, flag):
"""Show or hide the help tab in the stacked widget.
.. versionadded: 3.2
: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.
.. versionadded:: 3.2
"""
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 = osm_downloader_help()
string += message.to_html()
string += footer
self.help_web_view.setHtml(string)
def restore_state(self):
""" Read last state of GUI from configuration file."""
settings = QSettings()
try:
last_path = settings.value('directory', type=str)
except TypeError:
last_path = ''
self.output_directory.setText(last_path)
def save_state(self):
""" Store current state of GUI to configuration file """
settings = QSettings()
settings.setValue('directory', self.output_directory.text())
def update_extent(self, extent):
"""Update extent value in GUI based from an extent.
:param extent: A list in the form [xmin, ymin, xmax, ymax] where all
coordinates provided are in Geographic / EPSG:4326.
:type extent: list
"""
self.x_minimum.setValue(extent[0])
self.y_minimum.setValue(extent[1])
self.x_maximum.setValue(extent[2])
self.y_maximum.setValue(extent[3])
# Updating the country if possible.
rectangle = QgsRectangle(extent[0], extent[1], extent[2], extent[3])
center = rectangle.center()
for country in self.bbox_countries:
for polygon in self.bbox_countries[country]:
if polygon.contains(center):
index = self.country_comboBox.findText(country)
self.country_comboBox.setCurrentIndex(index)
break
else:
# Continue if the inner loop wasn't broken.
continue
# Inner loop was broken, break the outer.
break
else:
self.country_comboBox.setCurrentIndex(0)
def update_extent_from_map_canvas(self):
"""Update extent value in GUI based from value in map.
.. note:: Delegates to update_extent()
"""
self.bounding_box_group.setTitle(
self.tr('Bounding box from the map canvas'))
# Get the extent as [xmin, ymin, xmax, ymax]
extent = viewport_geo_array(self.iface.mapCanvas())
self.update_extent(extent)
def update_extent_from_rectangle(self):
"""Update extent value in GUI based from the QgsMapTool rectangle.
.. note:: Delegates to update_extent()
"""
self.show()
self.canvas.unsetMapTool(self.rectangle_map_tool)
self.canvas.setMapTool(self.pan_tool)
rectangle = self.rectangle_map_tool.rectangle()
if rectangle:
self.bounding_box_group.setTitle(
self.tr('Bounding box from rectangle'))
extent = rectangle_geo_array(rectangle, self.iface.mapCanvas())
self.update_extent(extent)
@pyqtSignature('') # prevents actions being handled twice
def on_directory_button_clicked(self):
"""Show a dialog to choose directory."""
# noinspection PyCallByClass,PyTypeChecker
self.output_directory.setText(
QFileDialog.getExistingDirectory(
self, self.tr('Select download directory')))
def drag_rectangle_on_map_canvas(self):
"""Hide the dialog and allow the user to draw a rectangle."""
self.hide()
self.rectangle_map_tool.reset()
self.canvas.unsetMapTool(self.pan_tool)
self.canvas.setMapTool(self.rectangle_map_tool)
def get_checked_features(self):
"""Create a tab with all checked features.
:return A list with all features which are checked in the UI.
:rtype list
"""
feature_types = []
if self.roads_flag.isChecked():
feature_types.append('roads')
if self.buildings_flag.isChecked():
feature_types.append('buildings')
if self.building_points_flag.isChecked():
feature_types.append('building-points')
if self.flood_prone_flag.isChecked():
feature_types.append('flood-prone')
if self.evacuation_centers_flag.isChecked():
feature_types.append('evacuation-centers')
if self.boundary_flag.isChecked():
level = self.admin_level_comboBox.currentIndex() + 1
feature_types.append('boundary-%s' % level)
return feature_types
def accept(self):
"""Do osm download and display it in QGIS."""
error_dialog_title = self.tr('InaSAFE OpenStreetMap Downloader Error')
# Lock the bounding_box_group
self.bounding_box_group.setDisabled(True)
# Get the extent
y_minimum = self.y_minimum.value()
y_maximum = self.y_maximum.value()
x_minimum = self.x_minimum.value()
x_maximum = self.x_maximum.value()
extent = [x_minimum, y_minimum, x_maximum, y_maximum]
# Validate extent
valid_flag = validate_geo_array(extent)
if not valid_flag:
message = self.tr(
'The bounding box is not valid. Please make sure it is '
'valid or check your projection!')
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(self, error_dialog_title, message)
# Unlock the bounding_box_group
self.bounding_box_group.setEnabled(True)
return
# Validate features
feature_types = self.get_checked_features()
if len(feature_types) < 1:
message = self.tr('No feature selected. '
'Please make sure you have checked one feature.')
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(self, error_dialog_title, message)
# Unlock the bounding_box_group
self.bounding_box_group.setEnabled(True)
return
try:
self.save_state()
self.require_directory()
for feature_type in feature_types:
output_directory = self.output_directory.text()
output_prefix = self.filename_prefix.text()
overwrite = self.overwrite_flag.isChecked()
output_base_file_path = self.get_output_base_path(
output_directory, output_prefix, feature_type, overwrite)
# noinspection PyTypeChecker
download(feature_type, output_base_file_path, extent,
self.progress_dialog)
try:
self.load_shapefile(feature_type, output_base_file_path)
except FileMissingError as exception:
display_warning_message_box(self, error_dialog_title,
exception.message)
self.done(QDialog.Accepted)
self.rectangle_map_tool.reset()
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as exception: # pylint: disable=broad-except
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(self, error_dialog_title,
exception.message)
self.progress_dialog.cancel()
finally:
# Unlock the bounding_box_group
self.bounding_box_group.setEnabled(True)
def get_output_base_path(self, output_directory, output_prefix,
feature_type, overwrite):
"""Get a full base name path to save the shapefile.
:param output_directory: The directory where to put results.
:type output_directory: str
:param output_prefix: The prefix to add for the shapefile.
:type output_prefix: str
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param overwrite: Boolean to know if we can overwrite existing files.
:type overwrite: bool
:return: The base path.
:rtype: str
"""
path = os.path.join(output_directory,
'%s%s' % (output_prefix, feature_type))
if overwrite:
# If a shapefile exists, we must remove it (only the .shp)
shp = '%s.shp' % path
if os.path.isfile(shp):
os.remove(shp)
else:
separator = '-'
suffix = self.get_unique_file_path_suffix('%s.shp' % path,
separator)
if suffix:
path = os.path.join(
output_directory, '%s%s%s%s' %
(output_prefix, feature_type, separator, suffix))
return path
@staticmethod
def get_unique_file_path_suffix(file_path, separator='-', i=0):
"""Return the minimum number to suffix the file to not overwrite one.
Example : /tmp/a.txt exists.
- With file_path='/tmp/b.txt' will return 0.
- With file_path='/tmp/a.txt' will return 1 (/tmp/a-1.txt)
:param file_path: The file to check.
:type file_path: str
:param separator: The separator to add before the prefix.
:type separator: str
:param i: The minimum prefix to check.
:type i: int
:return: The minimum prefix you should add to not overwrite a file.
:rtype: int
"""
basename = os.path.splitext(file_path)
if i != 0:
file_path_test = os.path.join(
'%s%s%s%s' % (basename[0], separator, i, basename[1]))
else:
file_path_test = file_path
if os.path.isfile(file_path_test):
return OsmDownloaderDialog.get_unique_file_path_suffix(
file_path, separator, i + 1)
else:
return i
def require_directory(self):
"""Ensure directory path entered in dialog exist.
When the path does not exist, this function will ask the user if he
want to create it or not.
:raises: CanceledImportDialogError - when user choose 'No' in
the question dialog for creating directory.
"""
path = self.output_directory.text()
if os.path.exists(path):
return
title = self.tr('Directory %s not exist') % path
question = self.tr(
'Directory %s not exist. Do you want to create it?') % path
# noinspection PyCallByClass,PyTypeChecker
answer = QMessageBox.question(self, title, question,
QMessageBox.Yes | QMessageBox.No)
if answer == QMessageBox.Yes:
if len(path) != 0:
os.makedirs(path)
else:
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(
self, self.tr('InaSAFE error'),
self.tr('Output directory can not be empty.'))
raise CanceledImportDialogError()
else:
raise CanceledImportDialogError()
def load_shapefile(self, feature_type, base_path):
"""Load downloaded shape file to QGIS Main Window.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param base_path: The base path of the shape file (without extension).
:type base_path: str
:raises: FileMissingError - when buildings.shp not exist
"""
path = '%s.shp' % base_path
if not os.path.exists(path):
message = self.tr(
'%s does not exist. The server does not have any data for '
'this extent.' % path)
raise FileMissingError(message)
layer = self.iface.addVectorLayer(path, feature_type, 'ogr')
# Check if it's a building layer and if it's QGIS 2.14 about the 2.5D
if qgis_version() >= 21400 and feature_type == 'buildings':
layer_scope = QgsExpressionContextUtils.layerScope(layer)
if not layer_scope.variable('qgis_25d_height'):
QgsExpressionContextUtils.setLayerVariable(
layer, 'qgis_25d_height', 0.0002)
if not layer_scope.variable('qgis_25d_angle'):
QgsExpressionContextUtils.setLayerVariable(
layer, 'qgis_25d_angle', 70)
canvas_srid = self.canvas.mapSettings().destinationCrs().srsid()
on_the_fly_projection = self.canvas.hasCrsTransformEnabled()
if canvas_srid != 4326 and not on_the_fly_projection:
if QGis.QGIS_VERSION_INT >= 20400:
self.canvas.setCrsTransformEnabled(True)
else:
display_warning_message_bar(
self.iface, self.tr('Enable \'on the fly\''),
self.tr(
'Your current projection is different than EPSG:4326. '
'You should enable \'on the fly\' to display '
'correctly your layers'))
def reject(self):
"""Redefinition of the method to remove the rectangle selection tool.
It will call the super method.
"""
self.canvas.unsetMapTool(self.rectangle_map_tool)
self.rectangle_map_tool.reset()
super(OsmDownloaderDialog, self).reject()
def process(self):
now = datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
if not os.path.exists(self.outputDir):
qm = QtGui.QMessageBox
ret = qm.question(
self, 'Create Directory?',
"Output results directory does not exist. Create?",
qm.Yes | qm.No)
if ret == qm.Yes:
os.makedirs(self.outputDir)
plantNos = [int(i) for i in self.edtPlants.text().split(',')]
if not plantNos:
qm.information(
self, 'Error',
'Please enter the plants to process separated by commas')
startFolder = os.path.normpath(
os.path.join(self.rootDir, str(self.startDir)))
endFolder = os.path.normpath(
os.path.join(self.rootDir, str(self.endDir)))
d = glob.glob(os.path.join(self.rootDir, self.getLSType()))
d.sort()
d = [os.path.normpath(p) for p in d]
if startFolder:
startIdx = d.index(startFolder)
endIdx = d.index(endFolder)
d = d[startIdx:endIdx + 1]
total2Proc = len(d) * len(plantNos)
progress = QProgressDialog("Generating results...", "Abort", 0,
total2Proc, self)
progress.setWindowTitle("Results Generator")
progress.setWindowModality(QtCore.Qt.WindowModal)
if self.cbOverride.isChecked():
sensorSize = [float(s) for s in self.sensorSize.split('x')]
lens = ps.Lens(int(self.focalLength), sensorSize)
camHeight = float(self.camHeight) * 10
else:
psconfig = PSConfig.fromPropertiesFile(
os.path.join(d[0], 'psconfig.properties'))
lens = ps.PGLens(int(psconfig.lens))
camHeight = psconfig.LS_VIS[0][2] * 10
imsz = cv2.imread(os.path.join(d[0], 'im0.bmp'),
cv2.IMREAD_GRAYSCALE).shape
h, v = LensSensorPixelCalc(lens.focalLen, lens.sensorSize, camHeight,
imsz)
flag = 0
try:
labelsDicts = {}
plantRegionProps = dict()
for i, p in enumerate(plantNos):
labels = dict()
if progress.wasCanceled():
break
raAll = []
leafStatsAll = []
for n, pth in enumerate(d):
progress.setValue(i * len(d) + n)
if progress.wasCanceled():
break
print('Processing Plant: {}, {}'.format(p, pth))
A, z, snIm, shadowIm = loadPlant(pth, p, self.roiFile)
session = os.path.basename(pth)
maskFname = os.path.join(
self.maskDir, '{}_{}_mask.png'.format(p, session))
mask = cv2.imread(maskFname)
if mask is None:
raise Exception(
'Mask file {} not found.'.format(maskFname))
if len(np.unique(mask)) == 2:
mask = cv2.cvtColor(mask, cv2.COLOR_RGB2GRAY)
mask = mask.astype(bool)
flag = 1
else:
labelMask = cv2.imread(maskFname)
im = Image.fromarray(labelMask)
labelMask = im.convert(mode="P",
palette=Image.ADAPTIVE)
if p not in labelsDicts.keys():
labelsDicts[p] = {}
labelMask, labelsDicts[p] = self.convert2IndexedLabels(
labelMask, labelsDicts[p])
labels.update({p: labelMask})
self.dumpMaskLabelImage(session, p, labelMask)
leaves, leafMasks, bladeMasks, stemMasks, processedLeafLabels = self.getLeafNormals(
snIm, labels[p])
plantLeavesStats = self.getStats(
leaves, leafMasks, bladeMasks, stemMasks,
processedLeafLabels, h, v)
leafStatsAll.append(
[os.path.basename(pth), plantLeavesStats])
mask = cv2.cvtColor(mask, cv2.COLOR_RGB2GRAY)
mask = mask.astype(bool)
Nx = snIm[:, :, 0]
Ny = snIm[:, :, 1]
Nz = snIm[:, :, 2]
area2D, areaNz, h, v = self.estimateRosetteArea(
mask, Nz, camHeight, lens.focalLen)
print('2D area: {:.2f}, 3D area: {:.2f}'.format(
area2D, areaNz))
if flag:
tmp = copy.deepcopy(mask)
tmp[mask == True] = 1
tmp[mask == False] = 0
tmp = tmp.astype(int)
props = regionprops(tmp)[0]
else:
label_img = label(mask)
props = regionprops(label_img)[0]
p_rw = props.perimeter * h
circ = (4 * math.pi * props.area) / (props.perimeter *
props.perimeter)
comp = props.solidity
coords = find_contours(mask, .5)[0]
D = pdist(coords)
D = squareform(D)
N, [I_row, I_col] = np.nanmax(D) * h, np.unravel_index(
np.argmax(D), D.shape)
az, elev, r = ps.cart2sph2(Nx, Ny, Nz)
elev = (90 - np.degrees(elev.copy()))
elev[mask == False] = np.nan
meanElev = np.nanmean(elev)
raAll.append([
area2D, areaNz, p_rw, circ, comp, N, meanElev,
os.path.basename(pth)
])
self.dumpRA2CSV(
raAll,
os.path.join(
self.outputDir, '{}_{}_{}_{}_{}_rosette'.format(
now, p, os.path.basename(self.rootDir),
os.path.basename(startFolder),
os.path.basename(endFolder))))
if len(leafStatsAll):
self.dumpLeaves2CSV(
leafStatsAll,
os.path.join(
self.outputDir, '{}_{}_{}_{}_{}_leaves'.format(
now, p, os.path.basename(self.rootDir),
os.path.basename(startFolder),
os.path.basename(endFolder))))
progress.setValue(total2Proc)
qm = QtGui.QMessageBox
qm.information(
self, 'Completed',
'Results can be found in {}.'.format(self.outputDir))
except Exception as e:
progress.cancel()
qm = QtGui.QMessageBox
qm.information(self, 'Error', '{}'.format(e))
raise e
def onPlotButton(self):
""" Batch plots selected geometry items using the selected template and scale.
"""
# check if one layer is selected
if self.ui.LayersComboBox.currentIndex() == -1:
QMessageBox.warning(self, tr("Warning"), tr("Select a layer!"))
self.ui.LayersComboBox.setFocus()
return
# check if one composition template is selected
if self.ui.TemplateList.selectedItems() == []:
QMessageBox.warning(self, tr("Warning"), tr("Select a composer template!"))
self.ui.TemplateList.setFocus()
return
template_filename = QDir(self.templatepath).absoluteFilePath(
self.ui.TemplateList.currentItem().text())
# get the scale
if self.ui.ScaleCombo.currentText()=="<extent>":
scale = -1
else:
try:
scale = int(self.ui.ScaleCombo.currentText())
except (ValueError):
QMessageBox.warning(self, tr("Warning"), tr("Scale must be a positive integer value!"))
self.ui.ScaleCombo.setFocus()
return
if scale<=0:
QMessageBox.warning(self, tr("Warning"), tr("Scale must be a positive integer value!"))
self.ui.ScaleCombo.setFocus()
return
# get composer name
composer_name = self.ui.ComposerEdit.text()
#check if there are selected items on polygon layers
if self.batch_plotting:
selected_layer = self.ui.LayersComboBox.itemData(self.ui.LayersComboBox.currentIndex())
selected_polygons = get_features(selected_layer.name(),QGis.Polygon,True)
if selected_polygons is None:
QMessageBox.warning(self, tr("Warning"),
tr("Select at least one polygon on layer '%s'!"%selected_layer.name()))
return
# check output setting
if self.ui.OutputTab.currentIndex() == 0: # to PDF
if not self.ui.SingleFileCheckbox.checkState():
if len( self.ui.OutputPDFEdit.text() ) == 0:
res = QMessageBox.warning(self, tr("Warning"),
tr("The filename pattern is empty. A default one will be used."),
QMessageBox.Ok | QMessageBox.Cancel, QMessageBox.Ok)
if res == QMessageBox.Cancel:
return
self.ui.OutputPDFEdit.setText( QgsAtlasComposition(None).filenamePattern() )
elif self.ui.OutputTab.currentIndex() == 1: # to Printer
# no need for checking
pass
elif self.ui.OutputTab.currentIndex() == 2: # to Composer View
# no need for checking yet
pass
# get map renderer of map canvas
renderer = self.iface.mapCanvas().mapRenderer()
self.composition = QgsComposition(renderer)
# if plot to Composer View the composition must be set
# before loading the template
# otherwise composer's item properties doesn't appear
if self.ui.OutputTab.currentIndex() == 2: # to Composer View
if len(composer_name)==0:
composer = self.iface.createNewComposer()
else:
composer = self.iface.createNewComposer(composer_name)
composer.setComposition(self.composition)
# read template file and add to composition
template_file = QFile( template_filename )
template_file.open(QIODevice.ReadOnly | QIODevice.Text)
template_content = template_file.readAll()
template_file.close()
document = QDomDocument()
document.setContent(template_content)
self.composition.loadFromTemplate(document)
# if batch_plotting is True create an atlas composition
if self.batch_plotting:
# get composer map item and set new scale and the grid
cmap = self.composition.getComposerMapById(0)
cmap.setNewScale(scale)
cmap.setGridIntervalX(scale/10)
cmap.setGridIntervalY(scale/10)
cmap.setAtlasDriven(True)
cmap.setAtlasScalingMode( QgsComposerMap.Fixed )
# set atlas composition parameters
atlas = self.composition.atlasComposition()
atlas.setEnabled(True)
atlas.setCoverageLayer( selected_layer )
atlas.setHideCoverage(False)
atlas.setFilenamePattern( self.ui.OutputPDFEdit.text() )
atlas.setSingleFile( self.ui.SingleFileCheckbox.checkState() )
atlas.setSortFeatures(False)
atlas.setFilterFeatures(True)
selected_ids = [f.id() for f in selected_layer.selectedFeatures()]
filter_id_string = ','.join([str(sid) for sid in selected_ids])
atlas.setFeatureFilter("$id in (" + filter_id_string + ")")
# print the complete atlas composition
if self.ui.OutputTab.currentIndex() == 0: # to PDF
self.composition.setAtlasMode( QgsComposition.ExportAtlas )
if self.pdfpath=="":
self.pdfpath = QgsProject.instance().homePath().encode(sys.getfilesystemencoding())
if self.ui.SingleFileCheckbox.checkState():
#print to single pdf (multi-page)
outputFileName = QDir(self.pdfpath).absoluteFilePath("qgis.pdf")
outputFileName = QFileDialog.getSaveFileName(self,
tr( "Choose a file name to save the map as" ),
outputFileName,
tr( "PDF Format" ) + " (*.pdf *.PDF)" )
if not outputFileName:
return
if not outputFileName.lower().endswith(".pdf"):
outputFileName += ".pdf"
self.pdfpath = QDir(outputFileName).absolutePath()
else:
#print to more pdf
outputDir = QFileDialog.getExistingDirectory( self,
tr( "Directory where to save PDF files" ),
self.pdfpath,
QFileDialog.ShowDirsOnly )
if not outputDir:
return
# test directory (if it exists and is writable)
if not QDir(outputDir).exists() or not QFileInfo(outputDir).isWritable():
QMessageBox.warning( self, tr( "Unable to write into the directory" ),
tr( "The given output directory is not writable. Cancelling." ) )
return
self.pdfpath = outputDir
printer = QPrinter()
painter = QPainter()
if not len(atlas.featureFilterErrorString()) == 0:
QMessageBox.warning( self, tr( "Atlas processing error" ),
tr( "Feature filter parser error: %s" % atlas.featureFilterErrorString() ) )
return
atlas.beginRender()
if self.ui.SingleFileCheckbox.checkState():
#prepare for first feature, so that we know paper size to begin with
atlas.prepareForFeature(0)
self.composition.beginPrintAsPDF(printer, outputFileName)
# set the correct resolution
self.composition.beginPrint(printer)
printReady = painter.begin(printer)
if not printReady:
QMessageBox.warning( self, tr( "Atlas processing error" ),
tr( "Error creating %s." % outputFileName ) )
return
progress = QProgressDialog( tr( "Rendering maps..." ), tr( "Abort" ), 0, atlas.numFeatures(), self )
QApplication.setOverrideCursor( Qt.BusyCursor )
for featureI in range(0, atlas.numFeatures()):
progress.setValue( featureI+1 )
# process input events in order to allow aborting
QCoreApplication.processEvents()
if progress.wasCanceled():
atlas.endRender()
break
if not atlas.prepareForFeature( featureI ):
QMessageBox.warning( self, tr( "Atlas processing error" ),
tr( "Atlas processing error" ) )
progress.cancel()
QApplication.restoreOverrideCursor()
return
if not self.ui.SingleFileCheckbox.checkState():
multiFilePrinter = QPrinter()
outputFileName = QDir( outputDir ).filePath( atlas.currentFilename() ) + ".pdf"
self.composition.beginPrintAsPDF( multiFilePrinter, outputFileName )
# set the correct resolution
self.composition.beginPrint( multiFilePrinter )
printReady = painter.begin( multiFilePrinter )
if not printReady:
QMessageBox.warning( self, tr( "Atlas processing error" ),
tr( "Error creating %s." % outputFileName ) )
progress.cancel()
QApplication.restoreOverrideCursor()
return
self.composition.doPrint( multiFilePrinter, painter )
painter.end()
else:
# start print on a new page if we're not on the first feature
if featureI > 0:
printer.newPage()
self.composition.doPrint( printer, painter )
atlas.endRender()
if self.ui.SingleFileCheckbox.checkState():
painter.end()
QApplication.restoreOverrideCursor()
elif self.ui.OutputTab.currentIndex() == 1: # to Printer
# if To Printer is selected set the printer
# setting up printer
if self.printer is None:
self.printer = QPrinter()
self.printer.setFullPage(True)
self.printer.setColorMode(QPrinter.Color)
# open printer setting dialog
pdlg = QPrintDialog(self.printer,self)
pdlg.setModal(True)
pdlg.setOptions(QAbstractPrintDialog.None)
if not pdlg.exec_() == QDialog.Accepted:
return
QApplication.setOverrideCursor(Qt.BusyCursor)
#prepare for first feature, so that we know paper size to begin with
self.composition.setAtlasMode( QgsComposition.ExportAtlas )
atlas.prepareForFeature(0)
# set orientation
if self.composition.paperWidth() > self.composition.paperHeight():
self.printer.setOrientation(QPrinter.Landscape)
self.printer.setPaperSize(
QSizeF(self.composition.paperHeight(), self.composition.paperWidth()),
QPrinter.Millimeter)
else:
self.printer.setOrientation(QPrinter.Portrait)
self.printer.setPaperSize(
QSizeF(self.composition.paperWidth(), self.composition.paperHeight()),
QPrinter.Millimeter)
self.printer.setResolution(self.composition.printResolution())
self.composition.beginPrint( self.printer )
painter = QPainter(self.printer)
if not len(atlas.featureFilterErrorString()) == 0:
QMessageBox.warning( self, tr( "Atlas processing error" ),
tr( "Feature filter parser error: %s" % atlas.featureFilterErrorString() ) )
QApplication.restoreOverrideCursor()
return
atlas.beginRender()
progress = QProgressDialog( tr( "Rendering maps..." ), tr( "Abort" ), 0, atlas.numFeatures(), self )
for featureI in range(0, atlas.numFeatures()):
progress.setValue( featureI+1 )
# process input events in order to allow cancelling
QCoreApplication.processEvents()
if progress.wasCanceled():
atlas.endRender()
break
if not atlas.prepareForFeature( featureI ):
QMessageBox.warning( self, tr( "Atlas processing error" ),
tr( "Atlas processing error" ) )
progress.cancel()
QApplication.restoreOverrideCursor()
return
# start print on a new page if we're not on the first feature
if featureI > 0:
self.printer.newPage()
self.composition.doPrint( self.printer, painter )
atlas.endRender()
painter.end()
QApplication.restoreOverrideCursor()
elif self.ui.OutputTab.currentIndex() == 2: # to Composer View
# create new composer
self.composition.setAtlasMode( QgsComposition.PreviewAtlas )
composer.composerWindow().on_mActionAtlasPreview_triggered(True)
atlas.parameterChanged.emit()
# Increase the reference count of the composer object
# for not being garbage collected.
# If not doing this composer would lost reference and qgis would crash
# when referring to this composer object or at quit.
ctypes.c_long.from_address( id(composer) ).value += 1
else:
# if batch_plotting is False open a QgsComposerView with current map canvas
cmap = self.composition.getComposerMapById(0)
# set the new extent of composer map item
newextent = self.iface.mapCanvas().mapRenderer().extent()
currentextent = cmap.extent()
canvas_ratio = newextent.width()/newextent.height()
map_ratio = currentextent.width()/currentextent.height()
if map_ratio < canvas_ratio:
dh = newextent.width() / map_ratio - newextent.height()
newextent.setYMinimum( newextent.yMinimum() - dh / 2 )
newextent.setYMaximum( newextent.yMaximum() + dh / 2 )
else:
dw = map_ratio * newextent.height() - newextent.width()
newextent.setXMinimum( newextent.xMinimum() - dw / 2 )
newextent.setXMaximum( newextent.xMaximum() + dw / 2 )
cmap.setNewExtent(newextent)
# set the new scale of composer map item
if scale>0:
cmap.setNewScale(scale)
sc = cmap.scale()
# set the grid interval according to the scale
cmap.setGridIntervalX(sc/10)
cmap.setGridIntervalY(sc/10)
# Increase the reference count of the composer object
# for not being garbage collected.
# If not doing this composer would lost reference and qgis would crash
# when referring to this composer object or at quit.
ctypes.c_long.from_address( id(composer) ).value += 1
self.accept()
class OsmDownloader(QDialog, Ui_OsmDownloaderBase):
"""Downloader for OSM data."""
def __init__(self, parent=None, iface=None):
"""Constructor for import dialog.
:param parent: Optional widget to use as parent
:type parent: QWidget
:param iface: An instance of QGisInterface
:type iface: QGisInterface
"""
QDialog.__init__(self, parent)
self.parent = parent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = iface
self.url = "http://osm.linfiniti.com/buildings-shp"
# creating progress dialog for download
self.progressDialog = QProgressDialog(self)
self.progressDialog.setAutoClose(False)
myTitle = self.tr("InaSAFE OpenStreetMap Downloader")
self.progressDialog.setWindowTitle(myTitle)
# Set up context help
helpButton = self.buttonBox.button(QtGui.QDialogButtonBox.Help)
QtCore.QObject.connect(helpButton, QtCore.SIGNAL('clicked()'),
self.show_help)
self.show_info()
self.network_manager = QNetworkAccessManager(self)
self.restore_state()
self.update_extent()
def show_info(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
header = html_header()
footer = html_footer()
string = header
heading = m.Heading(self.tr('OSM Downloader'), **INFO_STYLE)
body = self.tr(
'This tool will fetch building (\'structure\') data from the '
'OpenStreetMap project for you. The downloaded data will have '
'InaSAFE keywords defined and a default QGIS style applied. To '
'use this tool effectively:'
)
tips = m.BulletedList()
tips.add(self.tr(
'Use QGIS to zoom in to the area for which you want building data '
'to be retrieved.'))
tips.add(self.tr(
'Check the output directory is correct. Note that the saved '
'dataset will be called buildings.shp (and its associated files).'
))
tips.add(self.tr(
'If a dataset already exists in the output directory it will be '
'overwritten.'
))
tips.add(self.tr(
'This tool requires a working internet connection and fetching '
'buildings will consume your bandwidth.'))
tips.add(m.Link(
'http://www.openstreetmap.org/copyright',
text=self.tr(
'Downloaded data is copyright OpenStreetMap contributors'
' (click for more info).')
))
message = m.Message()
message.add(heading)
message.add(body)
message.add(tips)
string += message.to_html()
string += footer
self.webView.setHtml(string)
def restore_state(self):
""" Read last state of GUI from configuration file."""
mySetting = QSettings()
self.outDir.setText(mySetting.value('directory'))
def save_state(self):
""" Store current state of GUI to configuration file """
mySetting = QSettings()
mySetting.setValue('directory', self.outDir.text())
def show_help(self):
"""Load the help text for the dialog."""
show_context_help('openstreetmap_downloader')
def update_extent(self):
""" Update extent value in GUI based from value in map."""
myExtent = self.iface.mapCanvas().extent()
self.minLongitude.setText(str(myExtent.xMinimum()))
self.minLatitude.setText(str(myExtent.yMinimum()))
self.maxLongitude.setText(str(myExtent.xMaximum()))
self.maxLatitude.setText(str(myExtent.yMaximum()))
@pyqtSignature('') # prevents actions being handled twice
def on_pBtnDir_clicked(self):
""" Show a dialog to choose directory """
# noinspection PyCallByClass,PyTypeChecker
self.outDir.setText(QFileDialog.getExistingDirectory(
self, self.tr("Select download directory")))
def accept(self):
"""Do osm download and display it in QGIS."""
try:
self.save_state()
self.require_directory()
self.download()
self.load_shapefile()
self.done(QDialog.Accepted)
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as myEx:
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
QMessageBox.warning(
self,
self.tr("InaSAFE OpenStreetMap downloader error"),
str(myEx))
self.progressDialog.cancel()
def require_directory(self):
"""Ensure directory path entered in dialog exist.
When the path does not exist, this function will ask the user if he
want to create it or not.
:raises: CanceledImportDialogError - when user choose 'No' in
the question dialog for creating directory.
"""
myDir = str(self.outDir.text())
if os.path.exists(myDir):
return
myTitle = self.tr("Directory %s not exist") % myDir
myQuestion = self.tr(
"Directory %s not exist. Do you want to create it?"
) % myDir
# noinspection PyCallByClass,PyTypeChecker
myAnswer = QMessageBox.question(
self, myTitle,
myQuestion, QMessageBox.Yes | QMessageBox.No)
if myAnswer == QMessageBox.Yes:
os.makedirs(myDir)
else:
raise CanceledImportDialogError()
def download(self):
"""Download shapefiles from Linfinti server.
:raises: ImportDialogError, CanceledImportDialogError
"""
## preparing necessary data
myMinLng = str(self.minLongitude.text())
myMinLat = str(self.minLatitude.text())
myMaxLng = str(self.maxLongitude.text())
myMaxLat = str(self.maxLatitude.text())
myCoordinate = "{myMinLng},{myMinLat},{myMaxLng},{myMaxLat}".format(
myMinLng=myMinLng,
myMinLat=myMinLat,
myMaxLng=myMaxLng,
myMaxLat=myMaxLat
)
myShapeUrl = "{url}?bbox={myCoordinate}".format(
url=self.url,
myCoordinate=myCoordinate
)
myFilePath = tempfile.mktemp('.shp.zip')
# download and extract it
self.fetch_zip(myShapeUrl, myFilePath)
print myFilePath
print str(self.outDir.text())
self.extract_zip(myFilePath, str(self.outDir.text()))
self.progressDialog.done(QDialog.Accepted)
def fetch_zip(self, url, output_path):
"""Download zip containing shp file and write to output_path.
:param url: URL of the zip bundle.
:type url: str
:param output_path: Path of output file,
:type output_path: str
:raises: ImportDialogError - when network error occurred
"""
self.progressDialog.show()
self.progressDialog.setMaximum(100)
self.progressDialog.setValue(0)
# myLabelText = "Begin downloading shapefile from " \
# + "%s ..."
# self.progressDialog.setLabelText(self.tr(myLabelText) % (url))
myLabelText = self.tr("Downloading shapefile")
self.progressDialog.setLabelText(myLabelText)
myResult = download_url(
self.network_manager, url, output_path,
self.progressDialog)
if myResult is not True:
_, myErrorMessage = myResult
raise ImportDialogError(myErrorMessage)
def extract_zip(self, path, output_dir):
"""Extract all content of a .zip file from path to output_dir.
:param path: The path of the .zip file
:type path: str
:param output_dir: Output directory where the shp will be written to.
:type output_dir: str
:raises: IOError - when not able to open path or output_dir does not
exist.
"""
import zipfile
# extract all files...
myHandle = open(path, 'rb')
myZip = zipfile.ZipFile(myHandle)
for myName in myZip.namelist():
myOutPath = os.path.join(output_dir, myName)
myOutFile = open(myOutPath, 'wb')
myOutFile.write(myZip.read(myName))
myOutFile.close()
myHandle.close()
def load_shapefile(self):
"""
Load downloaded shape file to QGIS Main Window.
:raises: ImportDialogError - when buildings.shp not exist
"""
myDir = str(self.outDir.text())
myPath = os.path.join(myDir, 'buildings.shp')
if not os.path.exists(myPath):
myMessage = self.tr(
"%s don't exist. The server don't have buildings data."
)
raise ImportDialogError(myMessage)
self.iface.addVectorLayer(myPath, 'buildings', 'ogr')
class OsmDownloader(QDialog, Ui_OsmDownloaderBase):
"""Downloader for OSM data."""
def __init__(self, parent=None, iface=None):
"""Constructor for import dialog.
:param parent: Optional widget to use as parent
:type parent: QWidget
:param iface: An instance of QGisInterface
:type iface: QGisInterface
"""
QDialog.__init__(self, parent)
self.parent = parent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = iface
self.buildings_url = "http://osm.linfiniti.com/buildings-shp"
self.roads_url = "http://osm.linfiniti.com/roads-shp"
self.help_context = 'openstreetmap_downloader'
# creating progress dialog for download
self.progress_dialog = QProgressDialog(self)
self.progress_dialog.setAutoClose(False)
title = self.tr("InaSAFE OpenStreetMap Downloader")
self.progress_dialog.setWindowTitle(title)
# Set up context help
help_button = self.button_box.button(QtGui.QDialogButtonBox.Help)
help_button.clicked.connect(self.show_help)
self.show_info()
# set up the validator for the file name prefix
expression = QRegExp('^[A-Za-z0-9-_]*$')
validator = QRegExpValidator(expression)
self.filename_prefix.setValidator(validator)
# Set Proxy in webpage
proxy = get_proxy()
self.network_manager = QNetworkAccessManager(self)
if not proxy is None:
self.network_manager.setProxy(proxy)
self.restore_state()
self.update_extent()
def show_info(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
header = html_header()
footer = html_footer()
string = header
heading = m.Heading(self.tr('OSM Downloader'), **INFO_STYLE)
body = self.tr(
'This tool will fetch building (\'structure\') or road ('
'\'highway\') data from the OpenStreetMap project for you. '
'The downloaded data will have InaSAFE keywords defined and a '
'default QGIS style applied. To use this tool effectively:'
)
tips = m.BulletedList()
tips.add(self.tr(
'Your current extent will be used to determine the area for which '
'you want data to be retrieved. You can adjust it manually using '
'the bounding box options below.'))
tips.add(self.tr(
'Check the output directory is correct. Note that the saved '
'dataset will be called either roads.shp or buildings.shp (and '
'associated files).'
))
tips.add(self.tr(
'By default simple file names will be used (e.g. roads.shp, '
'buildings.shp). If you wish you can specify a prefix to '
'add in front of this default name. For example using a prefix '
'of \'padang-\' will cause the downloaded files to be saved as '
'\'padang-roads.shp\' and \'padang-buildings.shp\'. Note that '
'the only allowed prefix characters are A-Z, a-z, 0-9 and the '
'characters \'-\' and \'_\'. You can leave this blank if you '
'prefer.'
))
tips.add(self.tr(
'If a dataset already exists in the output directory it will be '
'overwritten.'
))
tips.add(self.tr(
'This tool requires a working internet connection and fetching '
'buildings or roads will consume your bandwidth.'))
tips.add(m.Link(
'http://www.openstreetmap.org/copyright',
text=self.tr(
'Downloaded data is copyright OpenStreetMap contributors'
' (click for more info).')
))
message = m.Message()
message.add(heading)
message.add(body)
message.add(tips)
string += message.to_html()
string += footer
self.web_view.setHtml(string)
def restore_state(self):
""" Read last state of GUI from configuration file."""
settings = QSettings()
try:
last_path = settings.value('directory', type=str)
except TypeError:
last_path = ''
self.output_directory.setText(last_path)
def save_state(self):
""" Store current state of GUI to configuration file """
settings = QSettings()
settings.setValue('directory', self.output_directory.text())
def show_help(self):
"""Load the help text for the dialog."""
show_context_help(self.help_context)
def update_extent(self):
""" Update extent value in GUI based from value in map."""
# Get the extent as [xmin, ymin, xmax, ymax]
extent = viewport_geo_array(self.iface.mapCanvas())
self.min_longitude.setText(str(extent[0]))
self.min_latitude.setText(str(extent[1]))
self.max_longitude.setText(str(extent[2]))
self.max_latitude.setText(str(extent[3]))
@pyqtSignature('') # prevents actions being handled twice
def on_directory_button_clicked(self):
""" Show a dialog to choose directory """
# noinspection PyCallByClass,PyTypeChecker
self.output_directory.setText(QFileDialog.getExistingDirectory(
self, self.tr("Select download directory")))
def accept(self):
"""Do osm download and display it in QGIS."""
index = self.feature_type.currentIndex()
if index == 0:
feature_types = ['buildings', 'roads']
elif index == 1:
feature_types = ['buildings']
else:
feature_types = ['roads']
try:
self.save_state()
self.require_directory()
for feature_type in feature_types:
self.download(feature_type)
self.load_shapefile(feature_type)
self.done(QDialog.Accepted)
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as myEx:
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
QMessageBox.warning(
self,
self.tr("InaSAFE OpenStreetMap downloader error"),
str(myEx))
self.progress_dialog.cancel()
def require_directory(self):
"""Ensure directory path entered in dialog exist.
When the path does not exist, this function will ask the user if he
want to create it or not.
:raises: CanceledImportDialogError - when user choose 'No' in
the question dialog for creating directory.
"""
path = str(self.output_directory.text())
if os.path.exists(path):
return
title = self.tr("Directory %s not exist") % path
question = self.tr(
"Directory %s not exist. Do you want to create it?"
) % path
# noinspection PyCallByClass,PyTypeChecker
answer = QMessageBox.question(
self, title,
question, QMessageBox.Yes | QMessageBox.No)
if answer == QMessageBox.Yes:
if len(path) != 0:
os.makedirs(path)
else:
# noinspection PyCallByClass,PyTypeChecker, PyArgumentList
QMessageBox.warning(
self,
self.tr('InaSAFE error'),
self.tr('Output directory can not be empty.'))
raise CanceledImportDialogError()
else:
raise CanceledImportDialogError()
def download(self, feature_type):
"""Download shapefiles from Linfinti server.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings' or 'roads' are supported.
:type feature_type: str
:raises: ImportDialogError, CanceledImportDialogError
"""
## preparing necessary data
min_longitude = str(self.min_longitude.text())
min_latitude = str(self.min_latitude.text())
max_longitude = str(self.max_longitude.text())
max_latitude = str(self.max_latitude.text())
box = (
'{min_longitude},{min_latitude},{max_longitude},'
'{max_latitude}').format(
min_longitude=min_longitude,
min_latitude=min_latitude,
max_longitude=max_longitude,
max_latitude=max_latitude
)
output_prefix = self.filename_prefix.text()
if feature_type == 'buildings':
url = "{url}?bbox={box}&qgis_version=2".format(
url=self.buildings_url, box=box)
else:
url = "{url}?bbox={box}&qgis_version=2".format(
url=self.roads_url, box=box)
if output_prefix is not None:
url += '&output_prefix=%s' % output_prefix
path = tempfile.mktemp('.shp.zip')
# download and extract it
self.fetch_zip(url, path)
#print path
#print str(self.output_directory.text())
self.extract_zip(path, str(self.output_directory.text()))
self.progress_dialog.done(QDialog.Accepted)
def fetch_zip(self, url, output_path):
"""Download zip containing shp file and write to output_path.
:param url: URL of the zip bundle.
:type url: str
:param output_path: Path of output file,
:type output_path: str
:raises: ImportDialogError - when network error occurred
"""
LOGGER.debug('Downloading file from URL: %s' % url)
LOGGER.debug('Downloading to: %s' % output_path)
self.progress_dialog.show()
self.progress_dialog.setMaximum(100)
self.progress_dialog.setValue(0)
# label_text = "Begin downloading shapefile from " \
# + "%s ..."
# self.progress_dialog.setLabelText(self.tr(label_text) % (url))
label_text = self.tr("Downloading shapefile")
self.progress_dialog.setLabelText(label_text)
result = download_url(
self.network_manager, url, output_path,
self.progress_dialog)
if result[0] is not True:
_, error_message = result
raise ImportDialogError(error_message)
@staticmethod
def extract_zip(path, output_dir):
"""Extract all content of a .zip file from path to output_dir.
:param path: The path of the .zip file
:type path: str
:param output_dir: Output directory where the shp will be written to.
:type output_dir: str
:raises: IOError - when not able to open path or output_dir does not
exist.
"""
import zipfile
# extract all files...
handle = open(path, 'rb')
zip_file = zipfile.ZipFile(handle)
for name in zip_file.namelist():
output_path = os.path.join(output_dir, name)
output_file = open(output_path, 'wb')
output_file.write(zip_file.read(name))
output_file.close()
handle.close()
def load_shapefile(self, feature_type):
"""
Load downloaded shape file to QGIS Main Window.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings' or 'roads' are supported.
:type feature_type: str
:raises: ImportDialogError - when buildings.shp not exist
"""
output_prefix = self.filename_prefix.text()
path = str(self.output_directory.text())
path = os.path.join(path, '%s%s.shp' % (output_prefix, feature_type))
if not os.path.exists(path):
message = self.tr(
"%s don't exist. The server doesn't have any data."
)
raise ImportDialogError(message)
self.iface.addVectorLayer(path, feature_type, 'ogr')
def onPlotButton(self):
""" Batch plots selected geometry items using the selected template and scale.
"""
# check if one layer is selected
if self.ui.LayersComboBox.currentIndex() == -1:
QMessageBox.warning(self, tr("Warning"), tr("Select a layer!"))
self.ui.LayersComboBox.setFocus()
return
# check if one composition template is selected
if self.ui.TemplateList.selectedItems() == []:
QMessageBox.warning(self, tr("Warning"),
tr("Select a composer template!"))
self.ui.TemplateList.setFocus()
return
template_filename = QDir(self.templatepath).absoluteFilePath(
self.ui.TemplateList.currentItem().text())
# get the scale
if self.ui.ScaleCombo.currentText() == "<extent>":
scale = -1
else:
try:
scale = int(self.ui.ScaleCombo.currentText())
except (ValueError):
QMessageBox.warning(
self, tr("Warning"),
tr("Scale must be a positive integer value!"))
self.ui.ScaleCombo.setFocus()
return
if scale <= 0:
QMessageBox.warning(
self, tr("Warning"),
tr("Scale must be a positive integer value!"))
self.ui.ScaleCombo.setFocus()
return
# get composer name
composer_name = self.ui.ComposerEdit.text()
#check if there are selected items on polygon layers
if self.batch_plotting:
selected_layer = self.ui.LayersComboBox.itemData(
self.ui.LayersComboBox.currentIndex())
selected_polygons = get_features(selected_layer.name(),
QGis.Polygon, True)
if selected_polygons is None:
QMessageBox.warning(
self, tr("Warning"),
tr("Select at least one polygon on layer '%s'!" %
selected_layer.name()))
return
# check output setting
if self.ui.OutputTab.currentIndex() == 0: # to PDF
if not self.ui.SingleFileCheckbox.checkState():
if len(self.ui.OutputPDFEdit.text()) == 0:
res = QMessageBox.warning(
self, tr("Warning"),
tr("The filename pattern is empty. A default one will be used."
), QMessageBox.Ok | QMessageBox.Cancel,
QMessageBox.Ok)
if res == QMessageBox.Cancel:
return
self.ui.OutputPDFEdit.setText(
QgsAtlasComposition(None).filenamePattern())
elif self.ui.OutputTab.currentIndex() == 1: # to Printer
# no need for checking
pass
elif self.ui.OutputTab.currentIndex() == 2: # to Composer View
# no need for checking yet
pass
# get map renderer of map canvas
renderer = self.iface.mapCanvas().mapRenderer()
self.composition = QgsComposition(renderer)
# if plot to Composer View the composition must be set
# before loading the template
# otherwise composer's item properties doesn't appear
if self.ui.OutputTab.currentIndex() == 2: # to Composer View
if len(composer_name) == 0:
composer = self.iface.createNewComposer()
else:
composer = self.iface.createNewComposer(composer_name)
composer.setComposition(self.composition)
# read template file and add to composition
template_file = QFile(template_filename)
template_file.open(QIODevice.ReadOnly | QIODevice.Text)
template_content = template_file.readAll()
template_file.close()
document = QDomDocument()
document.setContent(template_content)
self.composition.loadFromTemplate(document)
# if batch_plotting is True create an atlas composition
if self.batch_plotting:
# get composer map item and set new scale and the grid
cmap = self.composition.getComposerMapById(0)
cmap.setNewScale(scale)
cmap.setGridIntervalX(scale / 10)
cmap.setGridIntervalY(scale / 10)
cmap.setAtlasDriven(True)
cmap.setAtlasScalingMode(QgsComposerMap.Fixed)
# set atlas composition parameters
atlas = self.composition.atlasComposition()
atlas.setEnabled(True)
atlas.setCoverageLayer(selected_layer)
atlas.setHideCoverage(False)
atlas.setFilenamePattern(self.ui.OutputPDFEdit.text())
atlas.setSingleFile(self.ui.SingleFileCheckbox.checkState())
atlas.setSortFeatures(False)
atlas.setFilterFeatures(True)
selected_ids = [f.id() for f in selected_layer.selectedFeatures()]
filter_id_string = ','.join([str(sid) for sid in selected_ids])
atlas.setFeatureFilter("$id in (" + filter_id_string + ")")
# print the complete atlas composition
if self.ui.OutputTab.currentIndex() == 0: # to PDF
self.composition.setAtlasMode(QgsComposition.ExportAtlas)
if self.pdfpath == "":
self.pdfpath = QgsProject.instance().homePath().encode(
sys.getfilesystemencoding())
if self.ui.SingleFileCheckbox.checkState():
#print to single pdf (multi-page)
outputFileName = QDir(
self.pdfpath).absoluteFilePath("qgis.pdf")
outputFileName = QFileDialog.getSaveFileName(
self, tr("Choose a file name to save the map as"),
outputFileName,
tr("PDF Format") + " (*.pdf *.PDF)")
if not outputFileName:
return
if not outputFileName.lower().endswith(".pdf"):
outputFileName += ".pdf"
self.pdfpath = QDir(outputFileName).absolutePath()
else:
#print to more pdf
outputDir = QFileDialog.getExistingDirectory(
self, tr("Directory where to save PDF files"),
self.pdfpath, QFileDialog.ShowDirsOnly)
if not outputDir:
return
# test directory (if it exists and is writable)
if not QDir(outputDir).exists() or not QFileInfo(
outputDir).isWritable():
QMessageBox.warning(
self, tr("Unable to write into the directory"),
tr("The given output directory is not writable. Cancelling."
))
return
self.pdfpath = outputDir
printer = QPrinter()
painter = QPainter()
if not len(atlas.featureFilterErrorString()) == 0:
QMessageBox.warning(
self, tr("Atlas processing error"),
tr("Feature filter parser error: %s" %
atlas.featureFilterErrorString()))
return
atlas.beginRender()
if self.ui.SingleFileCheckbox.checkState():
#prepare for first feature, so that we know paper size to begin with
atlas.prepareForFeature(0)
self.composition.beginPrintAsPDF(printer, outputFileName)
# set the correct resolution
self.composition.beginPrint(printer)
printReady = painter.begin(printer)
if not printReady:
QMessageBox.warning(
self, tr("Atlas processing error"),
tr("Error creating %s." % outputFileName))
return
progress = QProgressDialog(tr("Rendering maps..."),
tr("Abort"), 0, atlas.numFeatures(),
self)
QApplication.setOverrideCursor(Qt.BusyCursor)
for featureI in range(0, atlas.numFeatures()):
progress.setValue(featureI + 1)
# process input events in order to allow aborting
QCoreApplication.processEvents()
if progress.wasCanceled():
atlas.endRender()
break
if not atlas.prepareForFeature(featureI):
QMessageBox.warning(self, tr("Atlas processing error"),
tr("Atlas processing error"))
progress.cancel()
QApplication.restoreOverrideCursor()
return
if not self.ui.SingleFileCheckbox.checkState():
multiFilePrinter = QPrinter()
outputFileName = QDir(outputDir).filePath(
atlas.currentFilename()) + ".pdf"
self.composition.beginPrintAsPDF(
multiFilePrinter, outputFileName)
# set the correct resolution
self.composition.beginPrint(multiFilePrinter)
printReady = painter.begin(multiFilePrinter)
if not printReady:
QMessageBox.warning(
self, tr("Atlas processing error"),
tr("Error creating %s." % outputFileName))
progress.cancel()
QApplication.restoreOverrideCursor()
return
self.composition.doPrint(multiFilePrinter, painter)
painter.end()
else:
# start print on a new page if we're not on the first feature
if featureI > 0:
printer.newPage()
self.composition.doPrint(printer, painter)
atlas.endRender()
if self.ui.SingleFileCheckbox.checkState():
painter.end()
QApplication.restoreOverrideCursor()
elif self.ui.OutputTab.currentIndex() == 1: # to Printer
# if To Printer is selected set the printer
# setting up printer
if self.printer is None:
self.printer = QPrinter()
self.printer.setFullPage(True)
self.printer.setColorMode(QPrinter.Color)
# open printer setting dialog
pdlg = QPrintDialog(self.printer, self)
pdlg.setModal(True)
pdlg.setOptions(QAbstractPrintDialog.None)
if not pdlg.exec_() == QDialog.Accepted:
return
QApplication.setOverrideCursor(Qt.BusyCursor)
#prepare for first feature, so that we know paper size to begin with
self.composition.setAtlasMode(QgsComposition.ExportAtlas)
atlas.prepareForFeature(0)
# set orientation
if self.composition.paperWidth(
) > self.composition.paperHeight():
self.printer.setOrientation(QPrinter.Landscape)
self.printer.setPaperSize(
QSizeF(self.composition.paperHeight(),
self.composition.paperWidth()),
QPrinter.Millimeter)
else:
self.printer.setOrientation(QPrinter.Portrait)
self.printer.setPaperSize(
QSizeF(self.composition.paperWidth(),
self.composition.paperHeight()),
QPrinter.Millimeter)
self.printer.setResolution(self.composition.printResolution())
self.composition.beginPrint(self.printer)
painter = QPainter(self.printer)
if not len(atlas.featureFilterErrorString()) == 0:
QMessageBox.warning(
self, tr("Atlas processing error"),
tr("Feature filter parser error: %s" %
atlas.featureFilterErrorString()))
QApplication.restoreOverrideCursor()
return
atlas.beginRender()
progress = QProgressDialog(tr("Rendering maps..."),
tr("Abort"), 0, atlas.numFeatures(),
self)
for featureI in range(0, atlas.numFeatures()):
progress.setValue(featureI + 1)
# process input events in order to allow cancelling
QCoreApplication.processEvents()
if progress.wasCanceled():
atlas.endRender()
break
if not atlas.prepareForFeature(featureI):
QMessageBox.warning(self, tr("Atlas processing error"),
tr("Atlas processing error"))
progress.cancel()
QApplication.restoreOverrideCursor()
return
# start print on a new page if we're not on the first feature
if featureI > 0:
self.printer.newPage()
self.composition.doPrint(self.printer, painter)
atlas.endRender()
painter.end()
QApplication.restoreOverrideCursor()
elif self.ui.OutputTab.currentIndex() == 2: # to Composer View
# create new composer
self.composition.setAtlasMode(QgsComposition.PreviewAtlas)
composer.composerWindow().on_mActionAtlasPreview_triggered(
True)
atlas.parameterChanged.emit()
# Increase the reference count of the composer object
# for not being garbage collected.
# If not doing this composer would lost reference and qgis would crash
# when referring to this composer object or at quit.
ctypes.c_long.from_address(id(composer)).value += 1
else:
# if batch_plotting is False open a QgsComposerView with current map canvas
cmap = self.composition.getComposerMapById(0)
# set the new extent of composer map item
newextent = self.iface.mapCanvas().mapRenderer().extent()
currentextent = cmap.extent()
canvas_ratio = newextent.width() / newextent.height()
map_ratio = currentextent.width() / currentextent.height()
if map_ratio < canvas_ratio:
dh = newextent.width() / map_ratio - newextent.height()
newextent.setYMinimum(newextent.yMinimum() - dh / 2)
newextent.setYMaximum(newextent.yMaximum() + dh / 2)
else:
dw = map_ratio * newextent.height() - newextent.width()
newextent.setXMinimum(newextent.xMinimum() - dw / 2)
newextent.setXMaximum(newextent.xMaximum() + dw / 2)
cmap.setNewExtent(newextent)
# set the new scale of composer map item
if scale > 0:
cmap.setNewScale(scale)
sc = cmap.scale()
# set the grid interval according to the scale
cmap.setGridIntervalX(sc / 10)
cmap.setGridIntervalY(sc / 10)
# Increase the reference count of the composer object
# for not being garbage collected.
# If not doing this composer would lost reference and qgis would crash
# when referring to this composer object or at quit.
ctypes.c_long.from_address(id(composer)).value += 1
self.accept()
class OsmDownloaderDialog(QDialog, FORM_CLASS):
"""Downloader for OSM data."""
def __init__(self, parent=None, iface=None):
"""Constructor for import dialog.
:param parent: Optional widget to use as parent
:type parent: QWidget
:param iface: An instance of QGisInterface
:type iface: QGisInterface
"""
QDialog.__init__(self, parent)
self.parent = parent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = iface
self.buildings_url = "http://osm.linfiniti.com/buildings-shp"
self.roads_url = "http://osm.linfiniti.com/roads-shp"
self.help_context = 'openstreetmap_downloader'
# creating progress dialog for download
self.progress_dialog = QProgressDialog(self)
self.progress_dialog.setAutoClose(False)
title = self.tr("InaSAFE OpenStreetMap Downloader")
self.progress_dialog.setWindowTitle(title)
# Set up context help
help_button = self.button_box.button(QtGui.QDialogButtonBox.Help)
help_button.clicked.connect(self.show_help)
self.show_info()
# set up the validator for the file name prefix
expression = QRegExp('^[A-Za-z0-9-_]*$')
validator = QRegExpValidator(expression, self.filename_prefix)
self.filename_prefix.setValidator(validator)
# Set Proxy in webpage
proxy = get_proxy()
self.network_manager = QNetworkAccessManager(self)
if proxy is not None:
self.network_manager.setProxy(proxy)
self.restore_state()
self.update_extent()
def show_info(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
header = html_header()
footer = html_footer()
string = header
heading = m.Heading(self.tr('OSM Downloader'), **INFO_STYLE)
body = self.tr(
'This tool will fetch building (\'structure\') or road ('
'\'highway\') data from the OpenStreetMap project for you. '
'The downloaded data will have InaSAFE keywords defined and a '
'default QGIS style applied. To use this tool effectively:'
)
tips = m.BulletedList()
tips.add(self.tr(
'Your current extent will be used to determine the area for which '
'you want data to be retrieved. You can adjust it manually using '
'the bounding box options below.'))
tips.add(self.tr(
'Check the output directory is correct. Note that the saved '
'dataset will be called either roads.shp or buildings.shp (and '
'associated files).'
))
tips.add(self.tr(
'By default simple file names will be used (e.g. roads.shp, '
'buildings.shp). If you wish you can specify a prefix to '
'add in front of this default name. For example using a prefix '
'of \'padang-\' will cause the downloaded files to be saved as '
'\'padang-roads.shp\' and \'padang-buildings.shp\'. Note that '
'the only allowed prefix characters are A-Z, a-z, 0-9 and the '
'characters \'-\' and \'_\'. You can leave this blank if you '
'prefer.'
))
tips.add(self.tr(
'If a dataset already exists in the output directory it will be '
'overwritten.'
))
tips.add(self.tr(
'This tool requires a working internet connection and fetching '
'buildings or roads will consume your bandwidth.'))
tips.add(m.Link(
'http://www.openstreetmap.org/copyright',
text=self.tr(
'Downloaded data is copyright OpenStreetMap contributors'
' (click for more info).')
))
message = m.Message()
message.add(heading)
message.add(body)
message.add(tips)
string += message.to_html()
string += footer
self.web_view.setHtml(string)
def restore_state(self):
""" Read last state of GUI from configuration file."""
settings = QSettings()
try:
last_path = settings.value('directory', type=str)
except TypeError:
last_path = ''
self.output_directory.setText(last_path)
def save_state(self):
""" Store current state of GUI to configuration file """
settings = QSettings()
settings.setValue('directory', self.output_directory.text())
def show_help(self):
"""Load the help text for the dialog."""
show_context_help(self.help_context)
def update_extent(self):
""" Update extent value in GUI based from value in map."""
# Get the extent as [xmin, ymin, xmax, ymax]
extent = viewport_geo_array(self.iface.mapCanvas())
self.min_longitude.setText(str(extent[0]))
self.min_latitude.setText(str(extent[1]))
self.max_longitude.setText(str(extent[2]))
self.max_latitude.setText(str(extent[3]))
def validate_extent(self):
"""Validate the bounding box before user click OK to download.
:return: True if the bounding box is valid, otherwise False
:rtype: bool
"""
min_latitude = float(str(self.min_latitude.text()))
max_latitude = float(str(self.max_latitude.text()))
min_longitude = float(str(self.min_longitude.text()))
max_longitude = float(str(self.max_longitude.text()))
# min_latitude < max_latitude
if min_latitude >= max_latitude:
return False
# min_longitude < max_longitude
if min_longitude >= max_longitude:
return False
# -90 <= latitude <= 90
if min_latitude < -90 or min_latitude > 90:
return False
if max_latitude < -90 or max_latitude > 90:
return False
# -180 <= longitude <= 180
if min_longitude < -180 or min_longitude > 180:
return False
if max_longitude < -180 or max_longitude > 180:
return False
return True
@pyqtSignature('') # prevents actions being handled twice
def on_directory_button_clicked(self):
""" Show a dialog to choose directory """
# noinspection PyCallByClass,PyTypeChecker
self.output_directory.setText(QFileDialog.getExistingDirectory(
self, self.tr("Select download directory")))
def accept(self):
"""Do osm download and display it in QGIS."""
error_dialog_title = self.tr('InaSAFE OpenStreetMap Downloader Error')
# Validate extent
valid_flag = self.validate_extent()
if not valid_flag:
message = self.tr(
'The bounding box is not valid. Please make sure it is '
'valid or check your projection!')
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
QMessageBox.warning(self, error_dialog_title, message)
return
# Get all the feature types
index = self.feature_type.currentIndex()
if index == 0:
feature_types = ['buildings', 'roads']
elif index == 1:
feature_types = ['buildings']
else:
feature_types = ['roads']
try:
self.save_state()
self.require_directory()
for feature_type in feature_types:
self.download(feature_type)
self.load_shapefile(feature_type)
self.done(QDialog.Accepted)
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as exception: # pylint: disable=broad-except
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
QMessageBox.warning(self, error_dialog_title, str(exception))
self.progress_dialog.cancel()
def require_directory(self):
"""Ensure directory path entered in dialog exist.
When the path does not exist, this function will ask the user if he
want to create it or not.
:raises: CanceledImportDialogError - when user choose 'No' in
the question dialog for creating directory.
"""
path = str(self.output_directory.text())
if os.path.exists(path):
return
title = self.tr("Directory %s not exist") % path
question = self.tr(
"Directory %s not exist. Do you want to create it?") % path
# noinspection PyCallByClass,PyTypeChecker
answer = QMessageBox.question(
self, title, question, QMessageBox.Yes | QMessageBox.No)
if answer == QMessageBox.Yes:
if len(path) != 0:
os.makedirs(path)
else:
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
QMessageBox.warning(
self,
self.tr('InaSAFE error'),
self.tr('Output directory can not be empty.'))
raise CanceledImportDialogError()
else:
raise CanceledImportDialogError()
def download(self, feature_type):
"""Download shapefiles from Linfiniti server.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings' or 'roads' are supported.
:type feature_type: str
:raises: ImportDialogError, CanceledImportDialogError
"""
# preparing necessary data
min_longitude = str(self.min_longitude.text())
min_latitude = str(self.min_latitude.text())
max_longitude = str(self.max_longitude.text())
max_latitude = str(self.max_latitude.text())
box = (
'{min_longitude},{min_latitude},{max_longitude},'
'{max_latitude}').format(
min_longitude=min_longitude,
min_latitude=min_latitude,
max_longitude=max_longitude,
max_latitude=max_latitude
)
output_prefix = self.filename_prefix.text()
if feature_type == 'buildings':
url = "{url}?bbox={box}&qgis_version=2".format(
url=self.buildings_url, box=box)
else:
url = "{url}?bbox={box}&qgis_version=2".format(
url=self.roads_url, box=box)
if output_prefix is not None:
url += '&output_prefix=%s' % output_prefix
path = tempfile.mktemp('.shp.zip')
# download and extract it
self.fetch_zip(url, path)
self.extract_zip(path, str(self.output_directory.text()))
self.progress_dialog.done(QDialog.Accepted)
def fetch_zip(self, url, output_path):
"""Download zip containing shp file and write to output_path.
:param url: URL of the zip bundle.
:type url: str
:param output_path: Path of output file,
:type output_path: str
:raises: ImportDialogError - when network error occurred
"""
LOGGER.debug('Downloading file from URL: %s' % url)
LOGGER.debug('Downloading to: %s' % output_path)
self.progress_dialog.show()
self.progress_dialog.setMaximum(100)
self.progress_dialog.setValue(0)
label_text = self.tr("Downloading shapefile")
self.progress_dialog.setLabelText(label_text)
# Download Process
downloader = FileDownloader(
self.network_manager, url, output_path, self.progress_dialog)
try:
result = downloader.download()
except IOError as ex:
raise IOError(ex)
if result[0] is not True:
_, error_message = result
raise DownloadError(error_message)
@staticmethod
def extract_zip(path, output_dir):
"""Extract all content of a .zip file from path to output_dir.
:param path: The path of the .zip file
:type path: str
:param output_dir: Output directory where the shp will be written to.
:type output_dir: str
:raises: IOError - when not able to open path or output_dir does not
exist.
"""
import zipfile
# extract all files...
handle = open(path, 'rb')
zip_file = zipfile.ZipFile(handle)
for name in zip_file.namelist():
output_path = os.path.join(output_dir, name)
output_file = open(output_path, 'wb')
output_file.write(zip_file.read(name))
output_file.close()
handle.close()
def load_shapefile(self, feature_type):
"""Load downloaded shape file to QGIS Main Window.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings' or 'roads' are supported.
:type feature_type: str
:raises: ImportDialogError - when buildings.shp not exist
"""
output_prefix = self.filename_prefix.text()
path = str(self.output_directory.text())
path = os.path.join(path, '%s%s.shp' % (output_prefix, feature_type))
if not os.path.exists(path):
message = self.tr(
"%s don't exist. The server doesn't have any data.")
raise ImportDialogError(message)
self.iface.addVectorLayer(path, feature_type, 'ogr')
class OsmDownloaderDialog(QDialog, FORM_CLASS):
"""Downloader for OSM data."""
def __init__(self, parent=None, iface=None):
"""Constructor for import dialog.
:param parent: Optional widget to use as parent
:type parent: QWidget
:param iface: An instance of QGisInterface
:type iface: QGisInterface
"""
QDialog.__init__(self, parent)
self.parent = parent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = iface
self.buildings_url = 'http://osm.linfiniti.com/buildings-shp'
self.building_points_url = \
'http://osm.linfiniti.com/building-points-shp'
self.roads_url = 'http://osm.linfiniti.com/roads-shp'
self.help_context = 'openstreetmap_downloader'
# creating progress dialog for download
self.progress_dialog = QProgressDialog(self)
self.progress_dialog.setAutoClose(False)
title = self.tr('InaSAFE OpenStreetMap Downloader')
self.progress_dialog.setWindowTitle(title)
# Set up context help
help_button = self.button_box.button(QtGui.QDialogButtonBox.Help)
help_button.clicked.connect(self.show_help)
self.show_info()
# set up the validator for the file name prefix
expression = QRegExp('^[A-Za-z0-9-_]*$')
validator = QRegExpValidator(expression, self.filename_prefix)
self.filename_prefix.setValidator(validator)
# Set Proxy in webpage
proxy = get_proxy()
self.network_manager = QNetworkAccessManager(self)
if proxy is not None:
self.network_manager.setProxy(proxy)
self.restore_state()
# Setup the rectangle map tool
self.canvas = iface.mapCanvas()
self.rectangle_map_tool = \
RectangleMapTool(self.canvas)
self.rectangle_map_tool.rectangle_created.connect(
self.update_extent_from_rectangle)
self.button_extent_rectangle.clicked.connect(
self.drag_rectangle_on_map_canvas)
# Setup pan tool
self.pan_tool = QgsMapToolPan(self.canvas)
self.canvas.setMapTool(self.pan_tool)
self.update_extent_from_map_canvas()
def show_info(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
header = html_header()
footer = html_footer()
string = header
heading = m.Heading(self.tr('OSM Downloader'), **INFO_STYLE)
body = self.tr(
'This tool will fetch building (\'structure\') or road ('
'\'highway\') data from the OpenStreetMap project for you. '
'The downloaded data will have InaSAFE keywords defined and a '
'default QGIS style applied. To use this tool effectively:')
tips = m.BulletedList()
tips.add(
self.
tr('Your current extent, when opening this window, will be used to '
'determine the area for which you want data to be retrieved.'
'You can interactively select the area by using the '
'\'select on map\' button - which will temporarily hide this '
'window and allow you to drag a rectangle on the map. After you '
'have finished dragging the rectangle, this window will '
'reappear.'))
tips.add(
self.
tr('Check the output directory is correct. Note that the saved '
'dataset will be called either roads.shp or buildings.shp (and '
'associated files).'))
tips.add(
self.
tr('By default simple file names will be used (e.g. roads.shp, '
'buildings.shp). If you wish you can specify a prefix to '
'add in front of this default name. For example using a prefix '
'of \'padang-\' will cause the downloaded files to be saved as '
'\'padang-roads.shp\' and \'padang-buildings.shp\'. Note that '
'the only allowed prefix characters are A-Z, a-z, 0-9 and the '
'characters \'-\' and \'_\'. You can leave this blank if you '
'prefer.'))
tips.add(
self.
tr('If a dataset already exists in the output directory it will be '
'overwritten.'))
tips.add(
self.
tr('This tool requires a working internet connection and fetching '
'buildings or roads will consume your bandwidth.'))
tips.add(
m.Link(
'http://www.openstreetmap.org/copyright',
text=self.tr(
'Downloaded data is copyright OpenStreetMap contributors'
' (click for more info).')))
message = m.Message()
message.add(heading)
message.add(body)
message.add(tips)
string += message.to_html()
string += footer
self.web_view.setHtml(string)
def restore_state(self):
""" Read last state of GUI from configuration file."""
settings = QSettings()
try:
last_path = settings.value('directory', type=str)
except TypeError:
last_path = ''
self.output_directory.setText(last_path)
def save_state(self):
""" Store current state of GUI to configuration file """
settings = QSettings()
settings.setValue('directory', self.output_directory.text())
def show_help(self):
"""Load the help text for the dialog."""
show_context_help(self.help_context)
def update_extent(self, extent):
"""Update extent value in GUI based from an extent.
:param extent: A list in the form [xmin, ymin, xmax, ymax] where all
coordinates provided are in Geographic / EPSG:4326.
:type extent: list
"""
self.min_longitude.setText(str(extent[0]))
self.min_latitude.setText(str(extent[1]))
self.max_longitude.setText(str(extent[2]))
self.max_latitude.setText(str(extent[3]))
def update_extent_from_map_canvas(self):
"""Update extent value in GUI based from value in map.
.. note:: Delegates to update_extent()
"""
self.groupBox.setTitle(self.tr('Bounding box from the map canvas'))
# Get the extent as [xmin, ymin, xmax, ymax]
extent = viewport_geo_array(self.iface.mapCanvas())
self.update_extent(extent)
def update_extent_from_rectangle(self):
"""Update extent value in GUI based from the QgsMapTool rectangle.
.. note:: Delegates to update_extent()
"""
self.show()
self.canvas.unsetMapTool(self.rectangle_map_tool)
self.canvas.setMapTool(self.pan_tool)
rectangle = self.rectangle_map_tool.rectangle()
if rectangle:
self.groupBox.setTitle(self.tr('Bounding box from rectangle'))
extent = rectangle_geo_array(rectangle, self.iface.mapCanvas())
self.update_extent(extent)
def validate_extent(self):
"""Validate the bounding box before user click OK to download.
:return: True if the bounding box is valid, otherwise False
:rtype: bool
"""
min_latitude = float(str(self.min_latitude.text()))
max_latitude = float(str(self.max_latitude.text()))
min_longitude = float(str(self.min_longitude.text()))
max_longitude = float(str(self.max_longitude.text()))
# min_latitude < max_latitude
if min_latitude >= max_latitude:
return False
# min_longitude < max_longitude
if min_longitude >= max_longitude:
return False
# -90 <= latitude <= 90
if min_latitude < -90 or min_latitude > 90:
return False
if max_latitude < -90 or max_latitude > 90:
return False
# -180 <= longitude <= 180
if min_longitude < -180 or min_longitude > 180:
return False
if max_longitude < -180 or max_longitude > 180:
return False
return True
@pyqtSignature('') # prevents actions being handled twice
def on_directory_button_clicked(self):
"""Show a dialog to choose directory."""
# noinspection PyCallByClass,PyTypeChecker
self.output_directory.setText(
QFileDialog.getExistingDirectory(
self, self.tr('Select download directory')))
def drag_rectangle_on_map_canvas(self):
"""Hide the dialog and allow the user to draw a rectangle."""
self.hide()
self.rectangle_map_tool.reset()
self.canvas.unsetMapTool(self.pan_tool)
self.canvas.setMapTool(self.rectangle_map_tool)
def accept(self):
"""Do osm download and display it in QGIS."""
error_dialog_title = self.tr('InaSAFE OpenStreetMap Downloader Error')
# Lock the groupbox
self.groupBox.setDisabled(True)
# Validate extent
valid_flag = self.validate_extent()
if not valid_flag:
message = self.tr(
'The bounding box is not valid. Please make sure it is '
'valid or check your projection!')
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(self, error_dialog_title, message)
# Unlock the groupbox
self.groupBox.setEnabled(True)
return
# Get all the feature types
index = self.feature_type.currentIndex()
if index == 0:
feature_types = ['buildings', 'roads', 'building-points']
elif index == 1:
feature_types = ['buildings']
elif index == 2:
feature_types = ['building-points']
else:
feature_types = ['roads']
try:
self.save_state()
self.require_directory()
for feature_type in feature_types:
output_directory = self.output_directory.text()
output_prefix = self.filename_prefix.text()
overwrite = self.overwrite_checkBox.isChecked()
output_base_file_path = self.get_output_base_path(
output_directory, output_prefix, feature_type, overwrite)
self.download(feature_type, output_base_file_path)
try:
self.load_shapefile(feature_type, output_base_file_path)
except FileMissingError as exception:
display_warning_message_box(self, error_dialog_title,
exception.message)
self.done(QDialog.Accepted)
self.rectangle_map_tool.reset()
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as exception: # pylint: disable=broad-except
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(self, error_dialog_title,
exception.message)
self.progress_dialog.cancel()
finally:
# Unlock the groupbox
self.groupBox.setEnabled(True)
def get_output_base_path(self, output_directory, output_prefix,
feature_type, overwrite):
"""Get a full base name path to save the shapefile.
:param output_directory: The directory where to put results.
:type output_directory: str
:param output_prefix: The prefix to add for the shapefile.
:type output_prefix: str
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param overwrite: Boolean to know if we can overwrite existing files.
:type overwrite: bool
:return: The base path.
:rtype: str
"""
path = os.path.join(output_directory,
'%s%s' % (output_prefix, feature_type))
if overwrite:
# If a shapefile exists, we must remove it (only the .shp)
shp = '%s.shp' % path
if os.path.isfile(shp):
os.remove(shp)
else:
separator = '-'
suffix = self.get_unique_file_path_suffix('%s.shp' % path,
separator)
if suffix:
path = os.path.join(
output_directory, '%s%s%s%s' %
(output_prefix, feature_type, separator, suffix))
return path
@staticmethod
def get_unique_file_path_suffix(file_path, separator='-', i=0):
"""Return the minimum number to suffix the file to not overwrite one.
Example : /tmp/a.txt exists.
- With file_path='/tmp/b.txt' will return 0.
- With file_path='/tmp/a.txt' will return 1 (/tmp/a-1.txt)
:param file_path: The file to check.
:type file_path: str
:param separator: The separator to add before the prefix.
:type separator: str
:param i: The minimum prefix to check.
:type i: int
:return: The minimum prefix you should add to not overwrite a file.
:rtype: int
"""
basename = os.path.splitext(file_path)
if i != 0:
file_path_test = os.path.join(
'%s%s%s%s' % (basename[0], separator, i, basename[1]))
else:
file_path_test = file_path
if os.path.isfile(file_path_test):
return OsmDownloaderDialog.get_unique_file_path_suffix(
file_path, separator, i + 1)
else:
return i
def require_directory(self):
"""Ensure directory path entered in dialog exist.
When the path does not exist, this function will ask the user if he
want to create it or not.
:raises: CanceledImportDialogError - when user choose 'No' in
the question dialog for creating directory.
"""
path = self.output_directory.text()
if os.path.exists(path):
return
title = self.tr('Directory %s not exist') % path
question = self.tr(
'Directory %s not exist. Do you want to create it?') % path
# noinspection PyCallByClass,PyTypeChecker
answer = QMessageBox.question(self, title, question,
QMessageBox.Yes | QMessageBox.No)
if answer == QMessageBox.Yes:
if len(path) != 0:
os.makedirs(path)
else:
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(
self, self.tr('InaSAFE error'),
self.tr('Output directory can not be empty.'))
raise CanceledImportDialogError()
else:
raise CanceledImportDialogError()
def download(self, feature_type, output_base_path):
"""Download shapefiles from Kartoza server.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param output_base_path: The base path of the shape file.
:type output_base_path: str
:raises: ImportDialogError, CanceledImportDialogError
"""
# preparing necessary data
min_longitude = str(self.min_longitude.text())
min_latitude = str(self.min_latitude.text())
max_longitude = str(self.max_longitude.text())
max_latitude = str(self.max_latitude.text())
box = ('{min_longitude},{min_latitude},{max_longitude},'
'{max_latitude}').format(min_longitude=min_longitude,
min_latitude=min_latitude,
max_longitude=max_longitude,
max_latitude=max_latitude)
if feature_type == 'buildings':
url = '{url}?bbox={box}&qgis_version=2'.format(
url=self.buildings_url, box=box)
elif feature_type == 'building-points':
url = '{url}?bbox={box}&qgis_version=2'.format(
url=self.building_points_url, box=box)
else:
url = '{url}?bbox={box}&qgis_version=2'.format(url=self.roads_url,
box=box)
if 'LANG' in os.environ:
env_lang = os.environ['LANG']
url += '&lang=%s' % env_lang
path = tempfile.mktemp('.shp.zip')
# download and extract it
self.fetch_zip(url, path, feature_type)
self.extract_zip(path, output_base_path)
self.progress_dialog.done(QDialog.Accepted)
def fetch_zip(self, url, output_path, feature_type):
"""Download zip containing shp file and write to output_path.
:param url: URL of the zip bundle.
:type url: str
:param output_path: Path of output file,
:type output_path: str
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:raises: ImportDialogError - when network error occurred
"""
LOGGER.debug('Downloading file from URL: %s' % url)
LOGGER.debug('Downloading to: %s' % output_path)
self.progress_dialog.show()
# Infinite progress bar when the server is fetching data.
# The progress bar will be updated with the file size later.
self.progress_dialog.setMaximum(0)
self.progress_dialog.setMinimum(0)
self.progress_dialog.setValue(0)
# Get a pretty label from feature_type, but not translatable
label_feature_type = feature_type.replace('-', ' ')
label_text = self.tr('Fetching %s' % label_feature_type)
self.progress_dialog.setLabelText(label_text)
# Download Process
downloader = FileDownloader(self.network_manager, url, output_path,
self.progress_dialog)
try:
result = downloader.download()
except IOError as ex:
raise IOError(ex)
if result[0] is not True:
_, error_message = result
if result[0] == QNetworkReply.OperationCanceledError:
raise CanceledImportDialogError(error_message)
else:
raise DownloadError(error_message)
@staticmethod
def extract_zip(zip_path, destination_base_path):
"""Extract different extensions to the destination base path.
Example : test.zip contains a.shp, a.dbf, a.prj
and destination_base_path = '/tmp/CT-buildings
Expected result :
- /tmp/CT-buildings.shp
- /tmp/CT-buildings.dbf
- /tmp/CT-buildings.prj
If two files in the zip with the same extension, only one will be
copied.
:param zip_path: The path of the .zip file
:type zip_path: str
:param destination_base_path: The destination base path where the shp
will be written to.
:type destination_base_path: str
:raises: IOError - when not able to open path or output_dir does not
exist.
"""
import zipfile
handle = open(zip_path, 'rb')
zip_file = zipfile.ZipFile(handle)
for name in zip_file.namelist():
extension = os.path.splitext(name)[1]
output_final_path = u'%s%s' % (destination_base_path, extension)
output_file = open(output_final_path, 'wb')
output_file.write(zip_file.read(name))
output_file.close()
handle.close()
def load_shapefile(self, feature_type, base_path):
"""Load downloaded shape file to QGIS Main Window.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param base_path: The base path of the shape file (without extension).
:type base_path: str
:raises: FileMissingError - when buildings.shp not exist
"""
path = '%s.shp' % base_path
if not os.path.exists(path):
message = self.tr(
'%s does not exist. The server does not have any data for '
'this extent.' % path)
raise FileMissingError(message)
self.iface.addVectorLayer(path, feature_type, 'ogr')
canvas_srid = self.canvas.mapRenderer().destinationCrs().srsid()
on_the_fly_projection = self.canvas.hasCrsTransformEnabled()
if canvas_srid != 4326 and not on_the_fly_projection:
if QGis.QGIS_VERSION_INT >= 20400:
self.canvas.setCrsTransformEnabled(True)
else:
display_warning_message_bar(
self.tr('Enable \'on the fly\''),
self.tr(
'Your current projection is different than EPSG:4326. '
'You should enable \'on the fly\' to display '
'correctly your layers'))
def reject(self):
"""Redefinition of the reject() method
to remove the rectangle selection tool.
It will call the super method.
"""
self.canvas.unsetMapTool(self.rectangle_map_tool)
self.rectangle_map_tool.reset()
super(OsmDownloaderDialog, self).reject()
class OsmDownloader(QDialog, Ui_OsmDownloaderBase):
"""Downloader for OSM data."""
def __init__(self, parent=None, iface=None):
"""Constructor for import dialog.
:param parent: Optional widget to use as parent
:type parent: QWidget
:param iface: An instance of QGisInterface
:type iface: QGisInterface
"""
QDialog.__init__(self, parent)
self.parent = parent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = iface
self.url = "http://osm.linfiniti.com/buildings-shp"
# creating progress dialog for download
self.progressDialog = QProgressDialog(self)
self.progressDialog.setAutoClose(False)
myTitle = self.tr("InaSAFE OpenStreetMap Downloader")
self.progressDialog.setWindowTitle(myTitle)
self.show_info()
self.network_manager = QNetworkAccessManager(self)
self.restore_state()
self.update_extent()
def show_info(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
header = html_header()
footer = html_footer()
string = header
heading = m.Heading(self.tr('OSM Downloader'), **INFO_STYLE)
body = self.tr(
'This tool will fetch building (\'structure\') data from the '
'OpenStreetMap project for you. The downloaded data will have '
'InaSAFE keywords defined and a default QGIS style applied. To '
'use this tool effectively:')
tips = m.BulletedList()
tips.add(
self.
tr('Use QGIS to zoom in to the area for which you want building data '
'to be retrieved.'))
tips.add(
self.
tr('Check the output directory is correct. Note that the saved '
'dataset will be called buildings.shp (and its associated files).'
))
tips.add(
self.
tr('If a dataset already exists in the output directory it will be '
'overwritten.'))
tips.add(
self.
tr('This tool requires a working internet connection and fetching '
'buildings will consume your bandwidth.'))
tips.add(
m.Link(
'http://www.openstreetmap.org/copyright',
text=self.tr(
'Downloaded data is copyright OpenStreetMap contributors'
' (click for more info).')))
message = m.Message()
message.add(heading)
message.add(body)
message.add(tips)
string += message.to_html()
string += footer
self.webView.setHtml(string)
def restore_state(self):
""" Read last state of GUI from configuration file."""
mySetting = QSettings()
self.outDir.setText(mySetting.value('directory').toString())
def save_state(self):
""" Store current state of GUI to configuration file """
mySetting = QSettings()
mySetting.setValue('directory', self.outDir.text())
def update_extent(self):
""" Update extent value in GUI based from value in map."""
myExtent = self.iface.mapCanvas().extent()
self.minLongitude.setText(str(myExtent.xMinimum()))
self.minLatitude.setText(str(myExtent.yMinimum()))
self.maxLongitude.setText(str(myExtent.xMaximum()))
self.maxLatitude.setText(str(myExtent.yMaximum()))
@pyqtSignature('') # prevents actions being handled twice
def on_pBtnDir_clicked(self):
""" Show a dialog to choose directory """
# noinspection PyCallByClass,PyTypeChecker
self.outDir.setText(
QFileDialog.getExistingDirectory(
self, self.tr("Select download directory")))
def accept(self):
"""Do osm download and display it in QGIS."""
try:
self.save_state()
self.require_directory()
self.download()
self.load_shapefile()
self.done(QDialog.Accepted)
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as myEx:
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
QMessageBox.warning(
self, self.tr("InaSAFE OpenStreetMap downloader error"),
str(myEx))
self.progressDialog.cancel()
def require_directory(self):
"""Ensure directory path entered in dialog exist.
When the path does not exist, this function will ask the user if he
want to create it or not.
:raises: CanceledImportDialogError - when user choose 'No' in
the question dialog for creating directory.
"""
myDir = str(self.outDir.text())
if os.path.exists(myDir):
return
myTitle = self.tr("Directory %1 not exist").arg(myDir)
myQuestion = self.tr(
"Directory %1 not exist. Are you want to create it?").arg(myDir)
# noinspection PyCallByClass,PyTypeChecker
myAnswer = QMessageBox.question(self, myTitle, myQuestion,
QMessageBox.Yes | QMessageBox.No)
if myAnswer == QMessageBox.Yes:
os.makedirs(myDir)
else:
raise CanceledImportDialogError()
def download(self):
"""Download shapefiles from Linfinti server.
:raises: ImportDialogError, CanceledImportDialogError
"""
## preparing necessary data
myMinLng = str(self.minLongitude.text())
myMinLat = str(self.minLatitude.text())
myMaxLng = str(self.maxLongitude.text())
myMaxLat = str(self.maxLatitude.text())
myCoordinate = "{myMinLng},{myMinLat},{myMaxLng},{myMaxLat}".format(
myMinLng=myMinLng,
myMinLat=myMinLat,
myMaxLng=myMaxLng,
myMaxLat=myMaxLat)
myShapeUrl = "{url}?bbox={myCoordinate}".format(
url=self.url, myCoordinate=myCoordinate)
myFilePath = tempfile.mktemp('.shp.zip')
# download and extract it
self.fetch_zip(myShapeUrl, myFilePath)
print myFilePath
print str(self.outDir.text())
self.extract_zip(myFilePath, str(self.outDir.text()))
self.progressDialog.done(QDialog.Accepted)
def fetch_zip(self, url, output_path):
"""Download zip containing shp file and write to output_path.
:param url: URL of the zip bundle.
:type url: str
:param output_path: Path of output file,
:type output_path: str
:raises: ImportDialogError - when network error occurred
"""
self.progressDialog.show()
self.progressDialog.setMaximum(100)
self.progressDialog.setValue(0)
# myLabelText = "Begin downloading shapefile from " \
# + "%1 ..."
# self.progressDialog.setLabelText(self.tr(myLabelText).arg(url))
myLabelText = self.tr("Downloading shapefile")
self.progressDialog.setLabelText(myLabelText)
myResult = download_url(self.network_manager, url, output_path,
self.progressDialog)
if myResult is not True:
_, myErrorMessage = myResult
raise ImportDialogError(myErrorMessage)
def extract_zip(self, path, output_dir):
"""Extract all content of a .zip file from path to output_dir.
:param path: The path of the .zip file
:type path: str
:param output_dir: Output directory where the shp will be written to.
:type output_dir: str
:raises: IOError - when not able to open path or output_dir does not
exist.
"""
import zipfile
## extract all files...
myHandle = open(path, 'rb')
myZip = zipfile.ZipFile(myHandle)
for myName in myZip.namelist():
myOutPath = os.path.join(output_dir, myName)
myOutFile = open(myOutPath, 'wb')
myOutFile.write(myZip.read(myName))
myOutFile.close()
myHandle.close()
def load_shapefile(self):
"""
Load downloaded shape file to QGIS Main Window.
:raises: ImportDialogError - when buildings.shp not exist
"""
myDir = str(self.outDir.text())
myPath = os.path.join(myDir, 'buildings.shp')
if not os.path.exists(myPath):
myMessage = self.tr(
"%s don't exist. The server don't have buildings data.")
raise ImportDialogError(myMessage)
self.iface.addVectorLayer(myPath, 'buildings', 'ogr')
def process(self):
if not os.path.exists(self.outputDir):
qm = QtGui.QMessageBox
ret = qm.question(self, 'Create Directory?',
"Output mask directory does not exist. Create?",
qm.Yes | qm.No)
if ret == qm.Yes:
os.makedirs(self.outputDir)
if self.cbCropAlbedo.isChecked():
if not os.path.exists(os.path.join(self.outputDir,
"CroppedAlbedo")):
os.makedirs(os.path.join(self.outputDir, "CroppedAlbedo"))
if self.cbCropGrayscale.isChecked():
if not os.path.exists(
os.path.join(self.outputDir, "CroppedGrayscale")):
os.makedirs(os.path.join(self.outputDir, "CroppedGrayscale"))
if self.cbCropComposite.isChecked():
if not os.path.exists(
os.path.join(self.outputDir, "CroppedComposite")):
os.makedirs(os.path.join(self.outputDir, "CroppedComposite"))
plantNos = [int(i) for i in self.edtPlants.text().split(',')]
if not plantNos:
qm.information(
self, 'Error',
'Please enter the plants to process separated by commas')
startFolder = os.path.normpath(
os.path.join(self.rootDir, str(self.cmbStartSess.currentText())))
endFolder = os.path.normpath(
os.path.join(self.rootDir, str(self.cmbEndSess.currentText())))
self.segParam1 = self.edtSegParam1.text()
self.segParam2 = self.edtSegParam2.text()
self.segParam3 = self.edtSegParam3.text()
d = glob.glob(os.path.join(self.rootDir, self.getLSType()))
d.sort()
d = [os.path.normpath(p) for p in d]
if startFolder:
startIdx = d.index(startFolder)
endIdx = d.index(endFolder)
d = d[startIdx:endIdx + 1]
total2Proc = len(d)
progress = QProgressDialog("Creating Masks...", "Abort", 0, total2Proc,
self)
progress.setWindowTitle("Mask Generator")
progress.setWindowModality(QtCore.Qt.WindowModal)
try:
for n, pth in enumerate(d):
progress.setValue(n)
if progress.wasCanceled():
break
for p in plantNos:
if progress.wasCanceled():
break
print('Processing Plant: {}, {}'.format(p, pth))
A, z, snIm, shadowIm = loadPlant(pth, p, self.roiFile)
shadowIm, minImg, maxImg = ps.shadowImageFromPth(pth)
rois = np.loadtxt(self.roiFile, dtype=np.uint16)
roi = rois[p]
minImg = minImg[roi[1]:roi[1] + roi[3],
roi[0]:roi[0] + roi[2]]
params = {
'im': A,
'minImg': minImg,
'T': int(self.segParam1),
'minSize': int(self.segParam2),
'diskSize': int(self.segParam3)
}
segmenter = MaskSegmenterBasic(params)
mask = segmenter.segmentImage()
mask.dtype = 'uint8'
data = np.load(
os.path.join(pth,
"SNZShadowImAndAlbedo_adaptiveLS.npz"))
snIm = data['snIm']
A = data['A']
A = self.normaliseRange(A)
snIm = self.normaliseRange(snIm)
im = glob.glob(os.path.join(pth, '*im[0-9].bmp'))
ims = []
for i, idx in enumerate(im):
ims.append(cv2.imread(idx, 0))
arr = np.zeros((np.size(ims[0], 1), np.size(ims[0], 0)),
np.float)
for im in ims:
arr = arr + im / (i + 1)
composite = np.zeros((np.size(ims[0],
1), np.size(ims[0], 0), 3))
composite[..., 0] = snIm[:, :, 0]
composite[..., 1] = snIm[:, :, 1]
composite[..., 2] = A
arr = self.normaliseRange(arr)
fname = '{}_{}_mask.png'.format(p, os.path.basename(pth))
cv2.imwrite(os.path.join(self.outputDir, fname),
mask * 255)
if self.cbCropAlbedo.isChecked():
fname = '{}_{}_albedo.png'.format(
p, os.path.basename(pth))
cv2.imwrite(
os.path.join(
os.path.join(self.outputDir, "CroppedAlbedo"),
fname),
self.normaliseRange(A)[roi[1]:roi[1] + roi[3],
roi[0]:roi[0] + roi[2]])
if self.cbCropGrayscale.isChecked():
fname = '{}_{}_grayscale.png'.format(
p, os.path.basename(pth))
cv2.imwrite(
os.path.join(
os.path.join(self.outputDir,
"CroppedGrayscale"), fname),
arr[roi[1]:roi[1] + roi[3],
roi[0]:roi[0] + roi[2]])
if self.cbCropComposite.isChecked():
fname = '{}_{}_composite.png'.format(
p, os.path.basename(pth))
cv2.imwrite(
os.path.join(
os.path.join(self.outputDir,
"CroppedComposite"), fname),
composite[roi[1]:roi[1] + roi[3],
roi[0]:roi[0] + roi[2]])
progress.setValue(total2Proc)
qm = QtGui.QMessageBox
qm.information(self, 'Completed',
'Masks can be found in {}.'.format(self.outputDir))
except Exception as e:
progress.cancel()
qm = QtGui.QMessageBox
qm.information(self, 'Error', '{}'.format(e))
raise e
class ImportDialog(QDialog, Ui_ImportDialogBase):
def __init__(self, theParent=None, theIface=None):
"""Constructor for import dialog.
Args:
* theParent - Optional widget to use as parent
* theIface - an instance of QGisInterface
Returns:
not applicable
Raises:
no exceptions explicitly raised
"""
QDialog.__init__(self, theParent)
self.parent = theParent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = theIface
self.url = "http://osm.linfiniti.com/buildings-shp"
## region coordinate: (latitude, longtitude, zoom_level)
self.regionExtent = {
'0': [18.87685, -71.493, 6], # haiti
'1': [-2.5436300, 116.8887, 3], # indonesia
'2': [1.22449, 15.40999, 2], # africa
'3': [34.05, 56.55, 3], # middle east
'4': [12.98855, 121.7166, 4], # philipine
}
# creating progress dialog for download
self.progressDialog = QProgressDialog(self)
self.progressDialog.setAutoClose(False)
myTitle = self.tr("InaSAFE OpenStreetMap Downloader")
self.progressDialog.setWindowTitle(myTitle)
## set map parameter based on placeholder self.map widget
theMap = InasafeLightMaps(self.gbxMap)
theMap.setGeometry(self.map.geometry())
theMap.setSizePolicy(self.map.sizePolicy())
self.map = theMap
self.nam = QNetworkAccessManager(self)
self.setupOptions()
self.restoreState()
self.cbxRegion.currentIndexChanged.connect(self.regionChanged)
self.map.m_normalMap.updated.connect(self.updateExtent)
def regionChanged(self, theIndex):
""" Slot that called when region combo box changed.
Params:
theIndex - index of combo box
"""
myRegionIndex = str(self.cbxRegion.itemData(theIndex).toString())
myCenter = self.regionExtent[myRegionIndex]
self.map.setCenter(myCenter[0], myCenter[1], myCenter[2])
# pylint: disable=W0613
def resizeEvent(self, theEvent):
""" Function that called when resize event occurred.
Params:
theEvent - QEvent instance. Not used.
"""
self.map.resize(self.gbxMap.width() - 30, self.gbxMap.height() - 30)
# pylint: disable=W0613
def setupOptions(self):
""" Set the content of combo box for region and preset """
self.cbxRegion.insertItem(0, 'Indonesia', 1)
self.cbxRegion.insertItem(1, 'Africa', 2)
self.cbxRegion.insertItem(2, 'Philippines', 4)
self.cbxRegion.insertItem(3, 'Central Asia/Middle East', 3)
self.cbxRegion.insertItem(4, 'Haiti', 0)
self.cbxPreset.insertItem(0, self.tr('Buildings'), 'building')
self.cbxPreset.insertItem(0, self.tr('Highway'), 'highway')
def restoreState(self):
""" Read last state of GUI from configuration file """
mySetting = QSettings()
myRegion = mySetting.value('region').toInt()
if myRegion[1] is True:
self.cbxRegion.setCurrentIndex(myRegion[0])
myPreset = mySetting.value('preset').toInt()
if myPreset[1] is True:
self.cbxPreset.setCurrentIndex(myPreset[0])
self.outDir.setText(mySetting.value('directory').toString())
myZoomLevel = mySetting.value('zoom_level').toInt()
myLatitude = mySetting.value('latitude').toDouble()
myLongitude = mySetting.value('longitude').toDouble()
if myZoomLevel[1] is True:
self.map.setCenter(myLatitude[0], myLongitude[0], myZoomLevel[0])
else:
# just set to indonesia extent
myCenter = self.regionExtent['1']
self.map.setCenter(myCenter[0], myCenter[1], myCenter[2])
def saveState(self):
""" Store current state of GUI to configuration file """
mySetting = QSettings()
mySetting.setValue('region', self.cbxRegion.currentIndex())
mySetting.setValue('preset', self.cbxPreset.currentIndex())
mySetting.setValue('directory', self.outDir.text())
mySetting.setValue('zoom_level', self.map.getZoomLevel())
myCenter = self.map.getCenter()
mySetting.setValue('latitude', myCenter[0])
mySetting.setValue('longitude', myCenter[1])
def updateExtent(self):
""" Update extent value in GUI based from value in map widget"""
myExtent = self.map.getExtent()
self.minLongitude.setText(str(myExtent[1]))
self.minLatitude.setText(str(myExtent[0]))
self.maxLongitude.setText(str(myExtent[3]))
self.maxLatitude.setText(str(myExtent[2]))
@pyqtSignature('') # prevents actions being handled twice
def on_pBtnDir_clicked(self):
""" Show a dialog to choose directory """
self.outDir.setText(QFileDialog.getExistingDirectory(
self, self.tr("Select Directory")))
def accept(self):
""" Do import process """
try:
self.saveState()
self.ensureDirExist()
self.doImport()
self.loadShapeFile()
self.done(QDialog.Accepted)
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as myEx:
QMessageBox.warning(
self,
self.tr("InaSAFE OpenStreetMap Downloader Error"),
str(myEx))
self.progressDialog.cancel()
def ensureDirExist(self):
"""
Ensure directory path entered in dialog exist.
When the path is not exist, this function will
ask the user if he want to create it or not.
Raises:
CanceledImportDialogError - when user choose 'No'
in question dialog for creating directory.
"""
myDir = str(self.outDir.text())
if os.path.exists(myDir):
return
myTitle = self.tr("Directory %1 not exist").arg(myDir)
myQuestion = self.tr(
"Directory %1 not exist. Are you want to create it?"
).arg(myDir)
myAnswer = QMessageBox.question(
self, myTitle,
myQuestion, QMessageBox.Yes | QMessageBox.No)
if myAnswer == QMessageBox.Yes:
os.makedirs(myDir)
else:
raise CanceledImportDialogError()
def doImport(self):
"""
Import shape files from Linfinti.
Raises:
* ImportDialogError - when network error occurred
* CanceledImportDialogError - when user press cancel button
"""
## preparing necessary data
myMinLng = str(self.minLongitude.text())
myMinLat = str(self.minLatitude.text())
myMaxLng = str(self.maxLongitude.text())
myMaxLat = str(self.maxLatitude.text())
myCurrentIndex = self.cbxPreset.currentIndex()
myType = str(self.cbxPreset.itemData(myCurrentIndex).toString())
myCoordinate = "{myMinLng},{myMinLat},{myMaxLng},{myMaxLat}".format(
myMinLng=myMinLng,
myMinLat=myMinLat,
myMaxLng=myMaxLng,
myMaxLat=myMaxLat
)
myShapeUrl = "{url}?bbox={myCoordinate}&obj={type}".format(
url=self.url,
myCoordinate=myCoordinate,
type=myType
)
myFilePath = tempfile.mktemp('.shp.zip')
# download and extract it
self.downloadShapeFile(myShapeUrl, myFilePath)
self.extractZip(myFilePath, str(self.outDir.text()))
self.progressDialog.done(QDialog.Accepted)
def downloadShapeFile(self, theUrl, theOutput):
"""
Download shape file from theUrl and write to theOutput.
Params:
* theUrl - URL of shape file
* theOutput - path of output file
Raises:
* ImportDialogError - when network error occurred
"""
self.progressDialog.show()
self.progressDialog.setMaximum(100)
self.progressDialog.setValue(0)
# myLabelText = "Begin downloading shapefile from " \
# + "%1 ..."
# self.progressDialog.setLabelText(self.tr(myLabelText).arg(theUrl))
myLabelText = self.tr("Begin downloading shapefile")
self.progressDialog.setLabelText(myLabelText)
myResult = httpDownload(self.nam, theUrl, theOutput,
self.progressDialog)
if myResult is not True:
_, myErrorMessage = myResult
raise ImportDialogError(myErrorMessage)
def extractZip(self, thePath, theOutDir):
"""
Extract all content of zip file from thePath to theOutDir.
Args:
* thePath - the path of zip file
* theOutDir - output directory
Raises:
IOError - when cannot open thePath or theOutDir is not exist.
"""
import zipfile
## extract all files...
myHandle = open(thePath, 'rb')
myZip = zipfile.ZipFile(myHandle)
for myName in myZip.namelist():
myOutPath = os.path.join(theOutDir, myName)
myOutFile = open(myOutPath, 'wb')
myOutFile.write(myZip.read(myName))
myOutFile.close()
myHandle.close()
def loadShapeFile(self):
"""
Load downloaded shape file to QGIS Main Window.
Raises:
ImportDialogError - when buildings.shp not exist
"""
myDir = str(self.outDir.text())
myPath = os.path.join(myDir, 'buildings.shp')
if not os.path.exists(myPath):
myMessage = self.tr(
"%s don't exist. The server don't have buildings data."
)
raise ImportDialogError(myMessage)
self.iface.addVectorLayer(myPath, 'buildings', 'ogr')
class OsmDownloaderDialog(QDialog, FORM_CLASS):
"""Downloader for OSM data."""
def __init__(self, parent=None, iface=None):
"""Constructor for import dialog.
:param parent: Optional widget to use as parent
:type parent: QWidget
:param iface: An instance of QGisInterface
:type iface: QGisInterface
"""
QDialog.__init__(self, parent)
self.parent = parent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = iface
self.help_context = 'openstreetmap_downloader'
# creating progress dialog for download
self.progress_dialog = QProgressDialog(self)
self.progress_dialog.setAutoClose(False)
title = self.tr('InaSAFE OpenStreetMap Downloader')
self.progress_dialog.setWindowTitle(title)
# Set up 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.stacked_widget.setCurrentIndex(1)
# Disable boundaries group box until boundary checkbox is ticked
self.boundary_group.setEnabled(False)
# set up the validator for the file name prefix
expression = QRegExp('^[A-Za-z0-9-_]*$')
validator = QRegExpValidator(expression, self.filename_prefix)
self.filename_prefix.setValidator(validator)
self.restore_state()
# Setup the rectangle map tool
self.canvas = iface.mapCanvas()
self.rectangle_map_tool = \
RectangleMapTool(self.canvas)
self.rectangle_map_tool.rectangle_created.connect(
self.update_extent_from_rectangle)
self.capture_button.clicked.connect(
self.drag_rectangle_on_map_canvas)
# Setup pan tool
self.pan_tool = QgsMapToolPan(self.canvas)
self.canvas.setMapTool(self.pan_tool)
# Setup helper for admin_level
json_file_path = resources_path('osm', 'admin_level_per_country.json')
if os.path.isfile(json_file_path):
self.countries = json.load(open(json_file_path))
self.bbox_countries = None
self.populate_countries()
# connect
self.country_comboBox.currentIndexChanged.connect(
self.update_helper_political_level)
self.admin_level_comboBox.currentIndexChanged.connect(
self.update_helper_political_level)
self.update_extent_from_map_canvas()
def update_helper_political_level(self):
"""To update the helper about the country and the admin_level."""
current_country = self.country_comboBox.currentText()
index = self.admin_level_comboBox.currentIndex()
current_level = self.admin_level_comboBox.itemData(index)
content = None
try:
content = \
self.countries[current_country]['levels'][str(current_level)]
if content == 'N/A' or content == 'fixme' or content == '':
raise KeyError
except KeyError:
content = self.tr('undefined')
finally:
text = self.tr('which represents %s in') % (content)
self.boundary_helper.setText(text)
def populate_countries(self):
"""Populate the combobox about countries and levels."""
for i in range(1, 12):
self.admin_level_comboBox.addItem(self.tr("Level %s" % i), i)
# Set current index to admin_level 8, the most common one
self.admin_level_comboBox.setCurrentIndex(7)
list_countries = self.countries.keys()
list_countries.sort()
for country in list_countries:
self.country_comboBox.addItem(country)
self.bbox_countries = {}
for country in list_countries:
coords = self.countries[country]['bbox']
self.bbox_countries[country] = QgsRectangle(
coords[0], coords[3], coords[2], coords[1])
self.update_helper_political_level()
@pyqtSlot()
@pyqtSignature('bool') # prevents actions being handled twice
def help_toggled(self, flag):
"""Show or hide the help tab in the stacked widget.
..versionadded: 3.2
: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.
.. versionadded:: 3.2
"""
self.stacked_widget.setCurrentIndex(1)
def show_help(self):
"""Show usage info to the user."""
# Read the header and footer html snippets
self.stacked_widget.setCurrentIndex(0)
header = html_header()
footer = html_footer()
string = header
heading = m.Heading(self.tr('OSM Downloader'), **INFO_STYLE)
body = self.tr(
'This tool will fetch building (\'structure\') or road ('
'\'highway\') data from the OpenStreetMap project for you. '
'The downloaded data will have InaSAFE keywords defined and a '
'default QGIS style applied. To use this tool effectively:'
)
tips = m.BulletedList()
tips.add(self.tr(
'Your current extent, when opening this window, will be used to '
'determine the area for which you want data to be retrieved.'
'You can interactively select the area by using the '
'\'select on map\' button - which will temporarily hide this '
'window and allow you to drag a rectangle on the map. After you '
'have finished dragging the rectangle, this window will '
'reappear.'))
tips.add(self.tr(
'Check the output directory is correct. Note that the saved '
'dataset will be called either roads.shp or buildings.shp (and '
'associated files).'
))
tips.add(self.tr(
'By default simple file names will be used (e.g. roads.shp, '
'buildings.shp). If you wish you can specify a prefix to '
'add in front of this default name. For example using a prefix '
'of \'padang-\' will cause the downloaded files to be saved as '
'\'padang-roads.shp\' and \'padang-buildings.shp\'. Note that '
'the only allowed prefix characters are A-Z, a-z, 0-9 and the '
'characters \'-\' and \'_\'. You can leave this blank if you '
'prefer.'
))
tips.add(self.tr(
'If a dataset already exists in the output directory it will be '
'overwritten.'
))
tips.add(self.tr(
'This tool requires a working internet connection and fetching '
'buildings or roads will consume your bandwidth.'))
tips.add(m.Link(
'http://www.openstreetmap.org/copyright',
text=self.tr(
'Downloaded data is copyright OpenStreetMap contributors'
' (click for more info).')
))
message = m.Message()
message.add(m.Brand())
message.add(heading)
message.add(body)
message.add(tips)
string += message.to_html()
string += footer
self.web_view.setHtml(string)
def restore_state(self):
""" Read last state of GUI from configuration file."""
settings = QSettings()
try:
last_path = settings.value('directory', type=str)
except TypeError:
last_path = ''
self.output_directory.setText(last_path)
def save_state(self):
""" Store current state of GUI to configuration file """
settings = QSettings()
settings.setValue('directory', self.output_directory.text())
def update_extent(self, extent):
"""Update extent value in GUI based from an extent.
:param extent: A list in the form [xmin, ymin, xmax, ymax] where all
coordinates provided are in Geographic / EPSG:4326.
:type extent: list
"""
self.x_minimum.setValue(extent[0])
self.y_minimum.setValue(extent[1])
self.x_maximum.setValue(extent[2])
self.y_maximum.setValue(extent[3])
# Updating the country if possible.
rectangle = QgsRectangle(extent[0], extent[1], extent[2], extent[3])
center = rectangle.center()
for country in self.bbox_countries:
if self.bbox_countries[country].contains(center):
index = self.country_comboBox.findText(country)
self.country_comboBox.setCurrentIndex(index)
break
else:
self.country_comboBox.setCurrentIndex(0)
def update_extent_from_map_canvas(self):
"""Update extent value in GUI based from value in map.
.. note:: Delegates to update_extent()
"""
self.bounding_box_group.setTitle(
self.tr('Bounding box from the map canvas'))
# Get the extent as [xmin, ymin, xmax, ymax]
extent = viewport_geo_array(self.iface.mapCanvas())
self.update_extent(extent)
def update_extent_from_rectangle(self):
"""Update extent value in GUI based from the QgsMapTool rectangle.
.. note:: Delegates to update_extent()
"""
self.show()
self.canvas.unsetMapTool(self.rectangle_map_tool)
self.canvas.setMapTool(self.pan_tool)
rectangle = self.rectangle_map_tool.rectangle()
if rectangle:
self.bounding_box_group.setTitle(
self.tr('Bounding box from rectangle'))
extent = rectangle_geo_array(rectangle, self.iface.mapCanvas())
self.update_extent(extent)
@pyqtSignature('') # prevents actions being handled twice
def on_directory_button_clicked(self):
"""Show a dialog to choose directory."""
# noinspection PyCallByClass,PyTypeChecker
self.output_directory.setText(QFileDialog.getExistingDirectory(
self, self.tr('Select download directory')))
def drag_rectangle_on_map_canvas(self):
"""Hide the dialog and allow the user to draw a rectangle."""
self.hide()
self.rectangle_map_tool.reset()
self.canvas.unsetMapTool(self.pan_tool)
self.canvas.setMapTool(self.rectangle_map_tool)
def get_checked_features(self):
"""Create a tab with all checked features.
:return A list with all features which are checked in the UI.
:rtype list
"""
feature_types = []
if self.roads_flag.isChecked():
feature_types.append('roads')
if self.buildings_flag.isChecked():
feature_types.append('buildings')
if self.building_points_flag.isChecked():
feature_types.append('building-points')
if self.potential_idp_flag.isChecked():
feature_types.append('potential-idp')
if self.boundary_flag.isChecked():
level = self.admin_level_comboBox.currentIndex() + 1
feature_types.append('boundary-%s' % level)
return feature_types
def accept(self):
"""Do osm download and display it in QGIS."""
error_dialog_title = self.tr('InaSAFE OpenStreetMap Downloader Error')
# Lock the bounding_box_group
self.bounding_box_group.setDisabled(True)
# Get the extent
y_minimum = self.y_minimum.value()
y_maximum = self.y_maximum.value()
x_minimum = self.x_minimum.value()
x_maximum = self.x_maximum.value()
extent = [x_minimum, y_minimum, x_maximum, y_maximum]
# Validate extent
valid_flag = validate_geo_array(extent)
if not valid_flag:
message = self.tr(
'The bounding box is not valid. Please make sure it is '
'valid or check your projection!')
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(self, error_dialog_title, message)
# Unlock the bounding_box_group
self.bounding_box_group.setEnabled(True)
return
# Validate features
feature_types = self.get_checked_features()
if len(feature_types) < 1:
message = self.tr(
'No feature selected. '
'Please make sure you have checked one feature.')
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(self, error_dialog_title, message)
# Unlock the bounding_box_group
self.bounding_box_group.setEnabled(True)
return
try:
self.save_state()
self.require_directory()
for feature_type in feature_types:
output_directory = self.output_directory.text()
output_prefix = self.filename_prefix.text()
overwrite = self.overwrite_flag.isChecked()
output_base_file_path = self.get_output_base_path(
output_directory, output_prefix, feature_type, overwrite)
download(
feature_type,
output_base_file_path,
extent,
self.progress_dialog)
try:
self.load_shapefile(feature_type, output_base_file_path)
except FileMissingError as exception:
display_warning_message_box(
self,
error_dialog_title,
exception.message)
self.done(QDialog.Accepted)
self.rectangle_map_tool.reset()
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as exception: # pylint: disable=broad-except
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(
self, error_dialog_title, exception.message)
self.progress_dialog.cancel()
finally:
# Unlock the bounding_box_group
self.bounding_box_group.setEnabled(True)
def get_output_base_path(
self,
output_directory,
output_prefix,
feature_type,
overwrite):
"""Get a full base name path to save the shapefile.
:param output_directory: The directory where to put results.
:type output_directory: str
:param output_prefix: The prefix to add for the shapefile.
:type output_prefix: str
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param overwrite: Boolean to know if we can overwrite existing files.
:type overwrite: bool
:return: The base path.
:rtype: str
"""
path = os.path.join(
output_directory, '%s%s' % (output_prefix, feature_type))
if overwrite:
# If a shapefile exists, we must remove it (only the .shp)
shp = '%s.shp' % path
if os.path.isfile(shp):
os.remove(shp)
else:
separator = '-'
suffix = self.get_unique_file_path_suffix(
'%s.shp' % path, separator)
if suffix:
path = os.path.join(output_directory, '%s%s%s%s' % (
output_prefix, feature_type, separator, suffix))
return path
@staticmethod
def get_unique_file_path_suffix(file_path, separator='-', i=0):
"""Return the minimum number to suffix the file to not overwrite one.
Example : /tmp/a.txt exists.
- With file_path='/tmp/b.txt' will return 0.
- With file_path='/tmp/a.txt' will return 1 (/tmp/a-1.txt)
:param file_path: The file to check.
:type file_path: str
:param separator: The separator to add before the prefix.
:type separator: str
:param i: The minimum prefix to check.
:type i: int
:return: The minimum prefix you should add to not overwrite a file.
:rtype: int
"""
basename = os.path.splitext(file_path)
if i != 0:
file_path_test = os.path.join(
'%s%s%s%s' % (basename[0], separator, i, basename[1]))
else:
file_path_test = file_path
if os.path.isfile(file_path_test):
return OsmDownloaderDialog.get_unique_file_path_suffix(
file_path, separator, i + 1)
else:
return i
def require_directory(self):
"""Ensure directory path entered in dialog exist.
When the path does not exist, this function will ask the user if he
want to create it or not.
:raises: CanceledImportDialogError - when user choose 'No' in
the question dialog for creating directory.
"""
path = self.output_directory.text()
if os.path.exists(path):
return
title = self.tr('Directory %s not exist') % path
question = self.tr(
'Directory %s not exist. Do you want to create it?') % path
# noinspection PyCallByClass,PyTypeChecker
answer = QMessageBox.question(
self, title, question, QMessageBox.Yes | QMessageBox.No)
if answer == QMessageBox.Yes:
if len(path) != 0:
os.makedirs(path)
else:
# noinspection PyCallByClass,PyTypeChecker,PyArgumentList
display_warning_message_box(
self,
self.tr('InaSAFE error'),
self.tr('Output directory can not be empty.'))
raise CanceledImportDialogError()
else:
raise CanceledImportDialogError()
def load_shapefile(self, feature_type, base_path):
"""Load downloaded shape file to QGIS Main Window.
:param feature_type: What kind of features should be downloaded.
Currently 'buildings', 'building-points' or 'roads' are supported.
:type feature_type: str
:param base_path: The base path of the shape file (without extension).
:type base_path: str
:raises: FileMissingError - when buildings.shp not exist
"""
path = '%s.shp' % base_path
if not os.path.exists(path):
message = self.tr(
'%s does not exist. The server does not have any data for '
'this extent.' % path)
raise FileMissingError(message)
self.iface.addVectorLayer(path, feature_type, 'ogr')
canvas_srid = self.canvas.mapRenderer().destinationCrs().srsid()
on_the_fly_projection = self.canvas.hasCrsTransformEnabled()
if canvas_srid != 4326 and not on_the_fly_projection:
if QGis.QGIS_VERSION_INT >= 20400:
self.canvas.setCrsTransformEnabled(True)
else:
display_warning_message_bar(
self.iface,
self.tr('Enable \'on the fly\''),
self.tr(
'Your current projection is different than EPSG:4326. '
'You should enable \'on the fly\' to display '
'correctly your layers')
)
def reject(self):
"""Redefinition of the reject() method
to remove the rectangle selection tool.
It will call the super method.
"""
self.canvas.unsetMapTool(self.rectangle_map_tool)
self.rectangle_map_tool.reset()
super(OsmDownloaderDialog, self).reject()
class ImportDialog(QDialog, Ui_ImportDialogBase):
def __init__(self, theParent=None, theIface=None):
"""Constructor for import dialog.
Args:
* theParent - Optional widget to use as parent
* theIface - an instance of QGisInterface
Returns:
not applicable
Raises:
no exceptions explicitly raised
"""
QDialog.__init__(self, theParent)
self.parent = theParent
self.setupUi(self)
self.setWindowTitle(self.tr('InaSAFE OpenStreetMap Downloader'))
self.iface = theIface
self.url = "http://osm.linfiniti.com/buildings-shp"
## region coordinate: (latitude, longtitude, zoom_level)
self.regionExtent = {
'0': [18.87685, -71.493, 6], # haiti
'1': [-2.5436300, 116.8887, 3], # indonesia
'2': [1.22449, 15.40999, 2], # africa
'3': [34.05, 56.55, 3], # middle east
'4': [12.98855, 121.7166, 4], # philipine
}
# creating progress dialog for download
self.progressDialog = QProgressDialog(self)
self.progressDialog.setAutoClose(False)
myTitle = self.tr("InaSAFE OpenStreetMap Downloader")
self.progressDialog.setWindowTitle(myTitle)
## set map parameter based on placeholder self.map widget
theMap = InasafeLightMaps(self.gbxMap)
theMap.setGeometry(self.map.geometry())
theMap.setSizePolicy(self.map.sizePolicy())
self.map = theMap
self.nam = QNetworkAccessManager(self)
self.setupOptions()
self.restoreState()
self.cbxRegion.currentIndexChanged.connect(self.regionChanged)
self.map.m_normalMap.updated.connect(self.updateExtent)
def regionChanged(self, theIndex):
""" Slot that called when region combo box changed.
Params:
theIndex - index of combo box
"""
myRegionIndex = str(self.cbxRegion.itemData(theIndex).toString())
myCenter = self.regionExtent[myRegionIndex]
self.map.setCenter(myCenter[0], myCenter[1], myCenter[2])
# pylint: disable=W0613
def resizeEvent(self, theEvent):
""" Function that called when resize event occurred.
Params:
theEvent - QEvent instance. Not used.
"""
self.map.resize(self.gbxMap.width() - 30, self.gbxMap.height() - 30)
# pylint: disable=W0613
def setupOptions(self):
""" Set the content of combo box for region and preset """
self.cbxRegion.insertItem(0, 'Indonesia', 1)
self.cbxRegion.insertItem(1, 'Africa', 2)
self.cbxRegion.insertItem(2, 'Philippines', 4)
self.cbxRegion.insertItem(3, 'Central Asia/Middle East', 3)
self.cbxRegion.insertItem(4, 'Haiti', 0)
self.cbxPreset.insertItem(0, self.tr('Buildings'), 'building')
self.cbxPreset.insertItem(0, self.tr('Highway'), 'highway')
def restoreState(self):
""" Read last state of GUI from configuration file """
mySetting = QSettings()
myRegion = mySetting.value('region').toInt()
if myRegion[1] is True:
self.cbxRegion.setCurrentIndex(myRegion[0])
myPreset = mySetting.value('preset').toInt()
if myPreset[1] is True:
self.cbxPreset.setCurrentIndex(myPreset[0])
self.outDir.setText(mySetting.value('directory').toString())
myZoomLevel = mySetting.value('zoom_level').toInt()
myLatitude = mySetting.value('latitude').toDouble()
myLongitude = mySetting.value('longitude').toDouble()
if myZoomLevel[1] is True:
self.map.setCenter(myLatitude[0], myLongitude[0], myZoomLevel[0])
else:
# just set to indonesia extent
myCenter = self.regionExtent['1']
self.map.setCenter(myCenter[0], myCenter[1], myCenter[2])
def saveState(self):
""" Store current state of GUI to configuration file """
mySetting = QSettings()
mySetting.setValue('region', self.cbxRegion.currentIndex())
mySetting.setValue('preset', self.cbxPreset.currentIndex())
mySetting.setValue('directory', self.outDir.text())
mySetting.setValue('zoom_level', self.map.getZoomLevel())
myCenter = self.map.getCenter()
mySetting.setValue('latitude', myCenter[0])
mySetting.setValue('longitude', myCenter[1])
def updateExtent(self):
""" Update extent value in GUI based from value in map widget"""
myExtent = self.map.getExtent()
self.minLongitude.setText(str(myExtent[1]))
self.minLatitude.setText(str(myExtent[0]))
self.maxLongitude.setText(str(myExtent[3]))
self.maxLatitude.setText(str(myExtent[2]))
@pyqtSignature('') # prevents actions being handled twice
def on_pBtnDir_clicked(self):
""" Show a dialog to choose directory """
self.outDir.setText(
QFileDialog.getExistingDirectory(self,
self.tr("Select Directory")))
def accept(self):
""" Do import process """
try:
self.saveState()
self.ensureDirExist()
self.doImport()
self.loadShapeFile()
self.done(QDialog.Accepted)
except CanceledImportDialogError:
# don't show anything because this exception raised
# when user canceling the import process directly
pass
except Exception as myEx:
QMessageBox.warning(
self, self.tr("InaSAFE OpenStreetMap Downloader Error"),
str(myEx))
self.progressDialog.cancel()
def ensureDirExist(self):
"""
Ensure directory path entered in dialog exist.
When the path is not exist, this function will
ask the user if he want to create it or not.
Raises:
CanceledImportDialogError - when user choose 'No'
in question dialog for creating directory.
"""
myDir = str(self.outDir.text())
if os.path.exists(myDir):
return
myTitle = self.tr("Directory %1 not exist").arg(myDir)
myQuestion = self.tr(
"Directory %1 not exist. Are you want to create it?").arg(myDir)
myAnswer = QMessageBox.question(self, myTitle, myQuestion,
QMessageBox.Yes | QMessageBox.No)
if myAnswer == QMessageBox.Yes:
os.makedirs(myDir)
else:
raise CanceledImportDialogError()
def doImport(self):
"""
Import shape files from Linfinti.
Raises:
* ImportDialogError - when network error occurred
* CanceledImportDialogError - when user press cancel button
"""
## preparing necessary data
myMinLng = str(self.minLongitude.text())
myMinLat = str(self.minLatitude.text())
myMaxLng = str(self.maxLongitude.text())
myMaxLat = str(self.maxLatitude.text())
myCurrentIndex = self.cbxPreset.currentIndex()
myType = str(self.cbxPreset.itemData(myCurrentIndex).toString())
myCoordinate = "{myMinLng},{myMinLat},{myMaxLng},{myMaxLat}".format(
myMinLng=myMinLng,
myMinLat=myMinLat,
myMaxLng=myMaxLng,
myMaxLat=myMaxLat)
myShapeUrl = "{url}?bbox={myCoordinate}&obj={type}".format(
url=self.url, myCoordinate=myCoordinate, type=myType)
myFilePath = tempfile.mktemp('.shp.zip')
# download and extract it
self.downloadShapeFile(myShapeUrl, myFilePath)
self.extractZip(myFilePath, str(self.outDir.text()))
self.progressDialog.done(QDialog.Accepted)
def downloadShapeFile(self, theUrl, theOutput):
"""
Download shape file from theUrl and write to theOutput.
Params:
* theUrl - URL of shape file
* theOutput - path of output file
Raises:
* ImportDialogError - when network error occurred
"""
self.progressDialog.show()
self.progressDialog.setMaximum(100)
self.progressDialog.setValue(0)
# myLabelText = "Begin downloading shapefile from " \
# + "%1 ..."
# self.progressDialog.setLabelText(self.tr(myLabelText).arg(theUrl))
myLabelText = self.tr("Begin downloading shapefile")
self.progressDialog.setLabelText(myLabelText)
myResult = httpDownload(self.nam, theUrl, theOutput,
self.progressDialog)
if myResult is not True:
_, myErrorMessage = myResult
raise ImportDialogError(myErrorMessage)
def extractZip(self, thePath, theOutDir):
"""
Extract all content of zip file from thePath to theOutDir.
Args:
* thePath - the path of zip file
* theOutDir - output directory
Raises:
IOError - when cannot open thePath or theOutDir is not exist.
"""
import zipfile
## extract all files...
myHandle = open(thePath, 'rb')
myZip = zipfile.ZipFile(myHandle)
for myName in myZip.namelist():
myOutPath = os.path.join(theOutDir, myName)
myOutFile = open(myOutPath, 'wb')
myOutFile.write(myZip.read(myName))
myOutFile.close()
myHandle.close()
def loadShapeFile(self):
"""
Load downloaded shape file to QGIS Main Window.
Raises:
ImportDialogError - when buildings.shp not exist
"""
myDir = str(self.outDir.text())
myPath = os.path.join(myDir, 'buildings.shp')
if not os.path.exists(myPath):
myMessage = self.tr(
"%s don't exist. The server don't have buildings data.")
raise ImportDialogError(myMessage)
self.iface.addVectorLayer(myPath, 'buildings', 'ogr')