Small fixes for Processing

python/plugins/processing/algs/gdal/GdalOgrAlgorithmProvider.py

@@ -42,6 +42,7 @@
 from translate import translate
 from pct2rgb import pct2rgb
 from merge import merge
+from buildvrt import buildvrt
 from polygonize import polygonize
 from gdaladdo import gdaladdo
 from ClipByExtent import ClipByExtent
@@ -112,7 +113,7 @@ def createAlgsList(self):
         # extending GeoAlgorithm directly (those that execute GDAL
         # using the console)
         self.preloadedAlgs = [nearblack(), information(), warp(), translate(),
-            rgb2pct(), pct2rgb(), merge(), polygonize(), gdaladdo(),
+            rgb2pct(), pct2rgb(), merge(), buildvrt(), polygonize(), gdaladdo(),
             ClipByExtent(), ClipByMask(), contour(), rasterize(), proximity(),
             sieve(), fillnodata(), ExtractProjection(), gdal2xyz(),
             hillshade(), slope(), aspect(), tri(), tpi(), roughness(),

python/plugins/processing/algs/gdal/buildvrt.py

@@ -0,0 +1,82 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    merge.py
+    ---------------------
+    Date                 : October 2014
+    Copyright            : (C) 2014 by Radoslaw Guzinski
+    Email                : rmgu at dhi-gras 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__ = 'Radoslaw Guzinski'
+__date__ = 'October 2014'
+__copyright__ = '(C) 2014, Radoslaw Guzinski'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+
+from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
+from processing.core.outputs import OutputRaster
+from processing.core.parameters import ParameterBoolean
+from processing.core.parameters import ParameterMultipleInput
+from processing.core.parameters import ParameterSelection
+from processing.tools.system import *
+from processing.algs.gdal.GdalUtils import GdalUtils
+import os
+
+class buildvrt(GdalAlgorithm):
+
+    INPUT = 'INPUT'
+    OUTPUT = 'OUTPUT'
+    RESOLUTION = 'RESOLUTION'
+    SEPARATE = 'SEPARATE'
+    PROJ_DIFFERENCE = 'PROJ_DIFFERENCE'
+
+    RESOLUTION_OPTIONS = ['average', 'highest', 'lowest']
+
+    def defineCharacteristics(self):
+        self.name = 'Build Virtual Raster'
+        self.group = '[GDAL] Miscellaneous'
+        self.addParameter(ParameterMultipleInput(buildvrt.INPUT, 'Input layers', ParameterMultipleInput.TYPE_RASTER))
+        self.addParameter(ParameterSelection(buildvrt.RESOLUTION, 'Resolution', buildvrt.RESOLUTION_OPTIONS, 0))
+        self.addParameter(ParameterBoolean(buildvrt.SEPARATE, 'Layer stack', True))
+        self.addParameter(ParameterBoolean(buildvrt.PROJ_DIFFERENCE, 'Allow projection difference', False))
+        self.addOutput(OutputRaster(buildvrt.OUTPUT, 'Output layer'))
+
+    def processAlgorithm(self, progress):
+        arguments = []
+        arguments.append('-resolution')
+        arguments.append(self.RESOLUTION_OPTIONS[self.getParameterValue(self.RESOLUTION)])
+        if self.getParameterValue(buildvrt.SEPARATE):
+            arguments.append('-separate')
+        if self.getParameterValue(buildvrt.PROJ_DIFFERENCE):
+            arguments.append('-allow_projection_difference')
+        # Always write input files to a text file in case there are many of them and the
+        # length of the command will be longer then allowed in command prompt
+        listFile = os.path.join(tempFolder(), 'buildvrtInputFiles.txt')
+        with open(listFile, 'w') as f:
+            f.write(self.getParameterValue(buildvrt.INPUT).replace(';', '\n'))
+        arguments.append('-input_file_list')
+        arguments.append(listFile)
+        out = self.getOutputValue(buildvrt.OUTPUT)
+        # Ideally the file extensions should be limited to just .vrt but I'm not sure how
+        # to do it simply so instead a check is performed.
+        _, ext = os.path.splitext(out)
+        if not ext.lower() == '.vrt':
+            out = out.replace(ext, '.vrt')
+            self.setOutputValue(self.OUTPUT, out)
+        arguments.append(out)
+
+
+        GdalUtils.runGdal(['gdalbuildvrt', GdalUtils.escapeAndJoin(arguments)], progress)

python/plugins/processing/algs/otb/OTBAlgorithm.py

@@ -148,7 +148,7 @@ def defineCharacteristicsFromFile(self):
             try:
                 if line.startswith("Parameter") or line.startswith("*Parameter"):
                     if line.startswith("*Parameter"):
-                        param = ParameterFactory.getFromString(line[1:])
+                        param = getParameterFromString(line[1:])
                         param.isAdvanced = True
                     else:
                         param = getParameterFromString(line)

python/plugins/processing/core/Processing.py

@@ -151,7 +151,10 @@ def initialize():
         ProcessingConfig.readSettings()
         RenderingStyles.loadStyles()
         Processing.loadFromProviders()
-
+
+        # Inform registered listeners that all providers' algorithms have been loaded
+        Processing.fireAlgsListHasChanged()
+
     @staticmethod
     def updateAlgsList():
         """Call this method when there has been any change that
@@ -182,6 +185,13 @@ def addAlgListListener(listener):
         called for all registered listeners.
         """
         Processing.listeners.append(listener)
+
+    @staticmethod
+    def removeAlgListListener(listener):
+        try:
+            Processing.listeners.remove(listener)
+        except:
+            pass
 
     @staticmethod
     def fireAlgsListHasChanged():