Minor SEXTANTE changes

python/plugins/sextante/algs/CreateConstantRaster.py

@@ -0,0 +1,66 @@
+from sextante.core.SextanteRasterWriter import SextanteRasterWriter
+from sextante.parameters.ParameterRaster import ParameterRaster
+
+
+
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    AutoincrementalField.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 sextante.core.GeoAlgorithm import GeoAlgorithm
+from PyQt4.QtCore import *
+from qgis.core import *
+from sextante.parameters.ParameterNumber import ParameterNumber
+from sextante.outputs.OutputRaster import OutputRaster
+from sextante.core.QGisLayers import QGisLayers
+
+class CreateConstantRaster(GeoAlgorithm):
+
+    INPUT = "INPUT"
+    OUTPUT = "OUTPUT"
+    NUMBER = "NUMBER"
+
+    #===========================================================================
+    # def getIcon(self):
+    #    return QtGui.QIcon(os.path.dirname(__file__) + "/../images/toolbox.png")
+    #===========================================================================
+
+    def processAlgorithm(self, progress):
+        output = self.getOutputFromName(self.OUTPUT)
+        value = self.getOutputValue(self.NUMBER)
+        layer = QGisLayers.getObjectFromUri(self.getParameterValue(self.INPUT))
+        cellsize = (layer.extent().xMaximum() - layer.extent().xMinimum())/layer.width()
+        w = SextanteRasterWriter(output.getCompatibleFileName(self), layer.extent().xMinimum(), layer.extent().yMinimum(), layer.extent().xMaximum(), 
+                                 layer.extent().yMaximum(), cellsize, 1, self.crs)
+        w.matrix[:] = value
+        w.close()
+
+    def defineCharacteristics(self):
+        self.name = "Create constant raster layer"
+        self.group = "Raster tools"
+        self.addParameter(ParameterRaster(self.INPUT, "Reference layer"))
+        self.addParameter(ParameterNumber(self.NUMBER, "Constant value", default = 1.0));
+        self.addOutput(OutputRaster(self.OUTPUT, "Output layer"))
+
+

python/plugins/sextante/core/SextanteRasterWriter.py

@@ -16,6 +16,7 @@
 *                                                                         *
 ***************************************************************************
 """
+from PyQt4 import QtGui
 
 __author__ = 'Victor Olaya'
 __date__ = 'September 2012'
@@ -26,32 +27,42 @@
 from qgis.core import *
 import numpy
 from PyQt4.QtCore import *
+from osgeo import gdal
+from osgeo import osr
 
 class SextanteRasterWriter:
 
     NODATA = -99999.0
 
     def __init__(self, fileName, minx, miny, maxx, maxy, cellsize, nbands, crs):
         self.fileName = fileName
-        self.nx = (maxx - minx) / float(cellsize)
-        self.ny = (maxy - miny) / float(cellsize)
-        self.matrix = numpy.empty(shape=(self.nx, self.ny, nbands))
+        self.nx = int((maxx - minx) / float(cellsize))
+        self.ny = int((maxy - miny) / float(cellsize))
+        self.nbands = nbands;
+        self.matrix = numpy.ones(shape=(self.ny, self.nx), dtype=numpy.float32)
         self.matrix[:] = self.NODATA
         self.cellsize = cellsize
-        self.crs = crs    
+        self.crs = crs   
+        self.minx = minx
+        self.maxy = maxy 
 
     def setValue(self, value, x, y, band = 0):
         try:
-            self.matrix[x, y, band] = value
+            self.matrix[y, x] = value
         except IndexError:
             pass
 
     def getValue(self, x, y, band = 0):        
         try:
-            return matrix[x, y, band]
+            return self.matrix[y, x]
         except IndexError:
             return self.NODATA        
 
     def close(self):
-        #todo
-        pass
+        format = "GTiff"
+        driver = gdal.GetDriverByName( format )
+        dst_ds = driver.Create(self.fileName, self.nx, self.ny, 1, gdal.GDT_Float32)  
+        dst_ds.SetProjection(str(self.crs.toWkt()))
+        dst_ds.SetGeoTransform( [self.minx, self.cellsize, 0, self.maxy, self.cellsize, 0] )                   
+        dst_ds.GetRasterBand(1).WriteArray(self.matrix)
+        dst_ds = None

python/plugins/sextante/outputs/OutputRaster.py

@@ -53,14 +53,3 @@ def getCompatibleFileName(self, alg):
                 self.compatible = SextanteUtils.getTempFilename(self.getDefaultFileExtension(alg))
             return self.compatible;
 
-    def getVectorWriter(self, minx, miny, maxx, maxy, cellsize, nbands, crs):
-        '''Returns a suitable raster. Use this to transparently handle output
-        values instead of creating your own method.
-
-        It should be called just once, since a new call might
-        result in previous data being replaced, thus rendering a previously
-        obtained writer useless
-        '''        
-
-        w = SextanteRasterWriter(self.value, minx, miny, maxx, maxy, cellsize, nbands, crs)        
-        return w

python/plugins/sextante/parameters/ParameterRaster.py

@@ -73,7 +73,7 @@ def setValue(self, obj):
                 if layer.name() == self.value:
                     self.value = unicode(layer.dataProvider().dataSourceUri())
                     return True
-        return True
+            return os.path.exists(self.value)
 
     def serialize(self):
         return self.__module__.split(".")[-1] + "|" + self.name + "|" + self.description +\

python/plugins/sextante/parameters/ParameterTable.py

@@ -16,6 +16,7 @@
 *                                                                         *
 ***************************************************************************
 """
+import os
 
 __author__ = 'Victor Olaya'
 __date__ = 'August 2012'
@@ -62,7 +63,7 @@ def setValue(self, obj):
             val = unicode(obj)
             if val.endswith("dbf") or val.endswith("csv"):
                 self.value = val
-                return True
+                return os.path.exists(self.value)
             else:
                 return False
 

python/plugins/sextante/parameters/ParameterVector.py

@@ -16,6 +16,7 @@
 *                                                                         *
 ***************************************************************************
 """
+import os
 
 __author__ = 'Victor Olaya'
 __date__ = 'August 2012'
@@ -60,7 +61,7 @@ def setValue(self, obj):
                 if layer.name() == self.value:
                     self.value = unicode(layer.source())
                     return True
-            return True
+            return os.path.exists(self.value)
 
     def getSafeExportedLayer(self):
         '''Returns not the value entered by the user, but a string with a filename which