def uploadHeader(self):
"""Import header from ASCII or TXT file.
This function open a QFileDialog() to select and open an ASC file.
The beginning of this file (ie. the header) is parsed to get value and
to fill corresponding widget parameter value.
The goal is to automate the filling of the parameters to improve
the user experience
Example of file header:
```
ncols 144
nrows 138
xllcorner 312487.6891250734
yllcorner 2397321.4964859663
cellsize 10.0
NODATA_value -1
```
"""
# Select the file with a QFileDialog()
dlg = QFileDialog()
dlg.setFileMode(QFileDialog.AnyFile)
#dlg.setFilter("ASC File (*.asc);; TXT File (*.txt);;All File (*.*)")
dlg.setNameFilters(
["All File (*.*)", "ASC File (*.asc)", "TXT File (*.txt)"])
dlg.selectNameFilter("All File (*.*)")
filenames = ''
if dlg.exec_():
filenames = dlg.selectedFiles()
if filenames != '':
# Open the file and parse header data
with open(str(filenames[0]), 'r') as infile:
for line in infile:
values = line.strip().split(' ')
if values[0] == "ncols":
ChloeUtils.wrapperSetValue(self.wrappers["N_COLS"],
int(values[1]))
elif values[0] == "nrows":
ChloeUtils.wrapperSetValue(self.wrappers["N_ROWS"],
float(values[1]))
elif values[0] == "xllcorner":
ChloeUtils.wrapperSetValue(self.wrappers["XLL_CORNER"],
float(values[1]))
elif values[0] == "yllcorner":
ChloeUtils.wrapperSetValue(self.wrappers["YLL_CORNER"],
float(values[1]))
elif values[0] == "cellsize":
ChloeUtils.wrapperSetValue(self.wrappers["CELL_SIZE"],
float(values[1]))
elif values[0] == "NODATA_value":
ChloeUtils.wrapperSetValue(
self.wrappers["NODATA_VALUE"], int(values[1]))
else:
break
def showOpen(self):
startdir = '.'
filters = QgsProviderRegistry.instance().fileRasterFilters()
lastFilter = "Multi-resolution Seamless Image Database (*.sid *.SID)"
dlg = QFileDialog(self)
dlg.setWindowTitle("Open raster")
dlg.setFileMode(QFileDialog.ExistingFile)
dlg.setNameFilter(filters)
dlg.selectNameFilter(lastFilter)
dlg.fileSelected.connect(self.openFile)
dlg.show()
def on_file_browse(self):
settings = QSettings()
# look for directory
path = QgsProject.instance().homePath()
if path == "":
path = settings.value("mask/file_dir", "")
if path == "":
path = QDir.homePath()
drivers = QgsVectorFileWriter.ogrDriverList()
filterList = []
filterMap = {}
for driver in drivers:
# grrr, driverMetadata is not really consistent
if driver.driverName == "ESRI Shapefile":
ext = "shp"
glob = "*.shp"
else:
md = QgsVectorFileWriter.MetaData()
if QgsVectorFileWriter.driverMetadata(driver.driverName, md):
ext = md.ext
glob = md.glob
else:
continue
fn = "%s (%s)" % (driver.longName, glob)
filterMap[fn] = (driver.driverName, ext, glob)
filterList += [fn]
fileFilters = ";;".join(filterList)
fd = QFileDialog(
None,
self.tr("Select a filename to save the mask layer to"),
path,
fileFilters,
)
save_format_name = self.parameters.file_format
self.save_format = None
for k, v in filterMap.items():
if v[0] == save_format_name:
self.save_format = v
fd.selectNameFilter(k)
break
def on_filter_selected(ff):
self.save_format = filterMap[ff]
fd.filterSelected.connect(on_filter_selected)
fd.setAcceptMode(QFileDialog.AcceptSave)
r = fd.exec_()
if r == 1:
fn = fd.selectedFiles()[0]
driver, ext, glob = self.save_format
if not fn.endswith("." + ext):
fn += "." + ext
self.ui.filePath.setText(fn)
self.ui.formatLbl.setText(self.save_format[0])
self.parameters.file_format = self.save_format[0]
self.parameters.file_path = fn
