mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-27 00:33:48 -05:00
114 lines
4.0 KiB
Python
114 lines
4.0 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
UnthreadedAlgorithmExecutor.py
|
|
---------------------
|
|
Date : August 2012
|
|
Copyright : (C) 2012 by Victor Olaya
|
|
Email : volayaf at gmail dot com
|
|
***************************************************************************
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
|
|
__author__ = 'Victor Olaya'
|
|
__date__ = 'August 2012'
|
|
__copyright__ = '(C) 2012, Victor Olaya'
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
__revision__ = '$Format:%H$'
|
|
|
|
from PyQt4.QtGui import *
|
|
from PyQt4.QtCore import *
|
|
from qgis.core import *
|
|
from sextante.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
|
|
from sextante.core.QGisLayers import QGisLayers
|
|
from sextante.core.SextanteUtils import SextanteUtils
|
|
from sextante.gui.SextantePostprocessing import SextantePostprocessing
|
|
import traceback
|
|
|
|
class UnthreadedAlgorithmExecutor:
|
|
|
|
@staticmethod
|
|
def runalg(alg, progress):
|
|
'''Executes a given algorithm, showing its progress in the progress object passed along.
|
|
Return true if everything went OK, false if the algorithm could not be completed'''
|
|
try:
|
|
alg.execute(progress)
|
|
return True
|
|
except GeoAlgorithmExecutionException, e :
|
|
QMessageBox.critical(None, "Error", e.msg)
|
|
return False
|
|
except Exception:
|
|
QMessageBox.critical(None, "Error", traceback.format_exc())
|
|
return False
|
|
|
|
@staticmethod
|
|
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(), provider.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, False)
|
|
i+=1
|
|
else:
|
|
return False;
|
|
|
|
return True
|
|
|
|
|
|
class SilentProgress():
|
|
|
|
def setText(self, text):
|
|
pass
|
|
|
|
def setPercentage(self, i):
|
|
pass
|
|
|
|
def setInfo(self, _):
|
|
pass
|
|
|
|
def setCommand(self, _):
|
|
pass
|
|
|
|
def setDebugInfo(self, _):
|
|
pass
|
|
|
|
def setConsoleInfo(self, _):
|
|
pass
|