def runalgIterating(alg, paramToIter, progress):
#generate all single-feature layers
settings = QSettings()
systemEncoding = settings.value("/UI/encoding", "System").toString()
layerfile = alg.getParameterValue(paramToIter)
layer = QGisLayers.getObjectFromUri(layerfile, False)
provider = layer.dataProvider()
allAttrs = provider.attributeIndexes()
provider.select(allAttrs)
feat = QgsFeature()
filelist = []
outputs = {}
while provider.nextFeature(feat):
output = SextanteUtils.getTempFilename("shp")
filelist.append(output)
writer = QgsVectorFileWriter(output, systemEncoding,
provider.fields(),
provider.geometryType(), layer.crs())
writer.addFeature(feat)
del writer
#store output values to use them later as basenames for all outputs
for out in alg.outputs:
outputs[out.name] = out.value
#now run all the algorithms
i = 1
for f in filelist:
alg.setParameterValue(paramToIter, f)
for out in alg.outputs:
filename = outputs[out.name]
if filename:
filename = filename[:filename.rfind(".")] + "_" + str(
i) + filename[filename.rfind("."):]
out.value = filename
progress.setText("Executing iteration " + str(i) + "/" +
str(len(filelist)) + "...")
progress.setPercentage((i * 100) / len(filelist))
if UnthreadedAlgorithmExecutor.runalg(alg, SilentProgress()):
SextantePostprocessing.handleAlgorithmResults(
alg, progress, False)
i += 1
else:
return False
return True
def finish():
QApplication.restoreOverrideCursor()
if onFinish is not None:
onFinish(alg, SilentProgress())
progress.close()
def runAlgorithm(algOrName, onFinish, *args):
if isinstance(algOrName, GeoAlgorithm):
alg = algOrName
else:
alg = Sextante.getAlgorithm(algOrName)
if alg == None:
print("Error: Algorithm not found\n")
return
if len(args) != alg.getVisibleParametersCount() + alg.getVisibleOutputsCount():
print ("Error: Wrong number of parameters")
sextante.alghelp(algOrName)
return
alg = alg.getCopy()
if isinstance(args, dict):
# set params by name
for name, value in args.items():
if alg.getParameterFromName(name).setValue(value):
continue;
if alg.getOutputFromName(name).setValue(value):
continue;
print ("Error: Wrong parameter value %s for parameter %s." % (value, name))
return
else:
i = 0
for param in alg.parameters:
if not param.hidden:
if not param.setValue(args[i]):
print ("Error: Wrong parameter value: " + unicode(args[i]))
return
i = i +1
for output in alg.outputs:
if not output.hidden:
if not output.setValue(args[i]):
print ("Error: Wrong output value: " + unicode(args[i]))
return
i = i +1
msg = alg.checkParameterValuesBeforeExecuting()
if msg:
print ("Unable to execute algorithm\n" + msg)
return
if not alg.checkInputCRS():
print ("Warning: Not all input layers use the same CRS.\n" +
"This can cause unexpected results.")
SextanteLog.addToLog(SextanteLog.LOG_ALGORITHM, alg.getAsCommand())
# don't set the wait cursor twice, because then when you restore it
# it will still be a wait cursor
cursor = QApplication.overrideCursor()
if cursor == None or cursor == 0:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
elif cursor.shape() != Qt.WaitCursor:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
useThreads = SextanteConfig.getSetting(SextanteConfig.USE_THREADS)
#this is doing strange things, so temporarily the thread execution is disabled from the console
useThreads = False
if useThreads:
algEx = AlgorithmExecutor(alg)
progress = QProgressDialog()
progress.setWindowTitle(alg.name)
progress.setLabelText("Executing %s..." % alg.name)
def finish():
QApplication.restoreOverrideCursor()
if onFinish is not None:
onFinish(alg, SilentProgress())
progress.close()
def error(msg):
QApplication.restoreOverrideCursor()
print msg
SextanteLog.addToLog(SextanteLog.LOG_ERROR, msg)
def cancel():
try:
algEx.finished.disconnect()
algEx.terminate()
QApplication.restoreOverrideCursor()
progress.close()
except:
pass
algEx.error.connect(error)
algEx.finished.connect(finish)
algEx.start()
algEx.wait()
else:
progress = SilentProgress()
ret = UnthreadedAlgorithmExecutor.runalg(alg, progress)
if onFinish is not None and ret:
onFinish(alg, progress)
QApplication.restoreOverrideCursor()
return alg