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started grass algorithm provider
git-svn-id: http://sextante.googlecode.com/svn/trunk/soft/bindings/qgis-plugin@48 881b9c09-3ef8-f3c2-ec3d-21d735c97f4d
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volayaf committed Mar 21, 2012
1 parent b7d940e commit 772e8e7c67d61a2f76efb4f7e282e3e0f809b24b
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Showing 198 changed files with 2,610 additions and 214 deletions.
@@ -1,8 +1,6 @@
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *


import os, sys
import inspect
from sextante.core.Sextante import Sextante
@@ -26,7 +24,7 @@ def __init__(self, iface):
self.iface = iface
QGisLayers.setInterface(iface)
Sextante.initialize()
Sextante .setInterface(iface)
Sextante.setInterface(iface)

def initGui(self):
self.toolbox = SextanteToolbox(self.iface)
@@ -77,9 +75,6 @@ def initGui(self):
QObject.connect(self.aboutAction, SIGNAL("triggered()"), self.openAbout)
self.menu.addAction(self.aboutAction)




menuBar = self.iface.mainWindow().menuBar()
menuBar.insertMenu(menuBar.actions()[-1], self.menu)

@@ -6,8 +6,6 @@
from PyQt4 import QtGui
import os.path
from sextante.core.SextanteUtils import SextanteUtils
from sextante.parameters.ParameterNumber import ParameterNumber
from sextante.parameters.ParameterBoolean import ParameterBoolean


class GeoAlgorithm:
@@ -20,6 +18,7 @@ def __init__(self):
self.defineCharacteristics()
self.providerName = ""
self.crs = None
self.helpfile = None

#methods to overwrite when creating a custom geoalgorithm
#=========================================================
@@ -3,6 +3,7 @@
from PyQt4.QtGui import *
from PyQt4 import QtCore, QtGui
from os import path
from sextante.core.SextanteConfig import SextanteConfig

class QGisLayers:

@@ -15,7 +16,7 @@ def getRasterLayers():
raster = list()

for layer in layers:
if layer.type() == layer.RasterLayer :
if layer.type() == layer.RasterLayer and not layer.usesProvider():
raster.append(layer)
return raster

@@ -24,7 +25,7 @@ def getVectorLayers(shapetype=-1):
layers = QGisLayers.iface.legendInterface().layers()
vector = list()
for layer in layers:
if layer.type() == layer.VectorLayer:
if layer.type() == layer.VectorLayer and not layer.usesProvider():
if shapetype == QGisLayers.ALL_TYPES or layer.geometryType() == shapetype:
vector.append(layer)
return vector
@@ -62,18 +63,32 @@ def load(layer, name = None, crs = None):
settings.setValue("/Projections/defaultBehaviour", QVariant(""))
if name == None:
name = path.split(layer)[1]
if layer.endswith("shp"):
qgslayer = QgsVectorLayer(layer, name, 'ogr')
qgslayer = QgsVectorLayer(layer, name , 'ogr')
if qgslayer.isValid():
if crs != None:
qgslayer.setCrs(crs, False)
qgslayer.setCrs(crs,False)
if qgslayer.geometryType == 0:
style = SextanteConfig.getSetting(SextanteConfig.VECTOR_POINT_STYLE)
elif qgslayer.geometryType == 1:
style = SextanteConfig.getSetting(SextanteConfig.VECTOR_LINE_STYLE)
else:
style = SextanteConfig.getSetting(SextanteConfig.VECTOR_POLYGON_STYLE)
qgslayer.loadNamedStyle(style)
QgsMapLayerRegistry.instance().addMapLayer(qgslayer)
else:
qgslayer = QgsRasterLayer(layer, name)
if crs != None:
qgslayer.setCrs(crs,False)
QgsMapLayerRegistry.instance().addMapLayer(qgslayer)
except Exception:
QtGui.QMessageBox(None, "Error", "Could not load layer: " + str(layer))
if qgslayer.isValid():
if crs != None:
qgslayer.setCrs(crs,False)

style = SextanteConfig.getSetting(SextanteConfig.RASTER_STYLE)
qgslayer.loadNamedStyle(style)
QgsMapLayerRegistry.instance().addMapLayer(qgslayer)
QGisLayers.iface.legendInterface().refreshLayerSymbology(qgslayer)
else:
QtGui.QMessageBox.critical(None, "Error", "Could not load layer: " + str(layer))
except Exception, e:
QtGui.QMessageBox.critical(None, "Error", "Could not load layer: " + str(layer))
finally:
if prjSetting:
settings.setValue("/Projections/defaultBehaviour", prjSetting)
@@ -1,6 +1,5 @@
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4 import QtCore, QtGui
from sextante.saga.SagaAlgorithmProvider import SagaAlgorithmProvider
from sextante.script.ScriptAlgorithmProvider import ScriptAlgorithmProvider
import copy
@@ -16,12 +15,14 @@
from sextante.modeler.ProviderIcons import ProviderIcons
from sextante.r.RAlgorithmProvider import RAlgorithmProvider
from sextante.parameters.ParameterSelection import ParameterSelection
from sextante.grass.GrassAlgorithmProvider import GrassAlgorithmProvider

class Sextante:

iface = None
providers = [SagaAlgorithmProvider(), ScriptAlgorithmProvider(),
MMQGISAlgorithmProvider(), FToolsAlgorithmProvider(), RAlgorithmProvider()]
MMQGISAlgorithmProvider(), FToolsAlgorithmProvider(),
RAlgorithmProvider(), GrassAlgorithmProvider()]
algs = {}
actions = {}
contextMenuActions = []
@@ -4,14 +4,21 @@
class SextanteConfig():

OUTPUT_FOLDER = "OUTPUT_FOLDER"
RASTER_STYLE = "RASTER_STYLE"
VECTOR_POINT_STYLE = "VECTOR_POINT_STYLE"
VECTOR_LINE_STYLE = "VECTOR_LINE_STYLE"
VECTOR_POLYGON_STYLE = "VECTOR_POLYGON_STYLE"

settings = {}

@staticmethod
def initialize():
SextanteConfig.addSetting(Setting("General", SextanteConfig.OUTPUT_FOLDER,
"Output folder", os.path.join(SextanteUtils.userFolder(),"outputs" )))

SextanteConfig.addSetting(Setting("General", SextanteConfig.RASTER_STYLE,"Style for raster layers",""))
SextanteConfig.addSetting(Setting("General", SextanteConfig.VECTOR_POINT_STYLE,"Style for point layers",""))
SextanteConfig.addSetting(Setting("General", SextanteConfig.VECTOR_LINE_STYLE,"Style for line layers",""))
SextanteConfig.addSetting(Setting("General", SextanteConfig.VECTOR_POLYGON_STYLE,"Style for polygon layers",""))

@staticmethod
def addSetting(setting):
@@ -0,0 +1,227 @@
import os
from qgis.core import *
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from sextante.core.GeoAlgorithm import GeoAlgorithm
from sextante.parameters.ParameterTable import ParameterTable
from sextante.parameters.ParameterMultipleInput import ParameterMultipleInput
from sextante.parameters.ParameterRaster import ParameterRaster
from sextante.outputs.OutputRaster import OutputRaster
from sextante.parameters.ParameterVector import ParameterVector
from sextante.parameters.ParameterBoolean import ParameterBoolean
from sextante.outputs.OutputVector import OutputVector
from sextante.saga.SagaUtils import SagaUtils
from sextante.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
from sextante.core.SextanteLog import SextanteLog
from sextante.parameters.ParameterFactory import ParameterFactory
from sextante.outputs.OutputFactory import OutputFactory
from sextante.core.SextanteConfig import SextanteConfig
from sextante.core.QGisLayers import QGisLayers
from sextante.grass.GrassUtils import GrassUtils
import time
from sextante.core.SextanteUtils import SextanteUtils

class GrassAlgorithm(GeoAlgorithm):

def __init__(self, descriptionfile):
GeoAlgorithm.__init__(self)
self._descriptionFile = descriptionfile
self.defineCharacteristicsFromFile()
self.numExportedLayers = 0
self.needsregion = False

def getIcon(self):
return QIcon(os.path.dirname(__file__) + "/../images/grass.png")

def defineCharacteristicsFromFile(self):
lines = open(self._descriptionFile)
line = lines.readline().strip("\n").strip()
self.name = line
line = lines.readline().strip("\n").strip()
self.group = line
while line != "":
try:
line = line.strip("\n").strip()
if line.startswith("Parameter"):
self.addParameter(ParameterFactory.getFromString(line))
elif line.startswith("Region"):
self.needsregion = True
else:
self.addOutput(OutputFactory.getFromString(line))
line = lines.readline().strip("\n").strip()
except Exception,e:
SextanteLog.addToLog(SextanteLog.LOG_ERROR, "Could not open GRASS algorithm: " + self._descriptionFile + "\n" + line)
raise e
lines.close()

def calculateResamplingExtent(self):
auto = SextanteConfig.getSetting(GrassUtils.GRASS_AUTO_REGION)
if auto:
first = True;
for param in self.parameters:
if isinstance(param, ParameterRaster):
if isinstance(param.value, QgsRasterLayer):
value = param.value
else:
value = QGisLayers.getObjectFromUri(param.value)
if first:
self.xmin = value.extent().xMinimum()
self.xmax = value.extent().xMaximum()
self.ymin = value.extent().yMinimum()
self.ymax = value.extent().yMaximum()
self.cellsize = (value.extent().xMaximum() - value.extent().xMinimum())/value.getRasterXDim()
first = False
else:
self.xmin = min(self.xmin, value.extent().xMinimum())
self.xmax = max(self.xmax, value.extent().xMaximum())
self.ymin = min(self.ymin, value.extent().yMinimum())
self.ymax = max(self.ymax, value.extent().yMaximum())
self.cellsize = max(self.cellsize, (value.extent().xMaximum() - value.extent().xMinimum())/value.getRasterXDim())
else:
self.xmin = SextanteConfig.getSetting(SagaUtils.SAGA_RESAMPLING_REGION_XMIN)
self.xmax = SextanteConfig.getSetting(SagaUtils.SAGA_RESAMPLING_REGION_XMAX)
self.ymin = SextanteConfig.getSetting(SagaUtils.SAGA_RESAMPLING_REGION_YMIN)
self.ymax = SextanteConfig.getSetting(SagaUtils.SAGA_RESAMPLING_REGION_YMAX)
self.cellsize = SextanteConfig.getSetting(SagaUtils.SAGA_RESAMPLING_REGION_CELLSIZE)


def processAlgorithm(self, progress):
path = GrassUtils.grassPath()
if path == "":
raise GeoAlgorithmExecutionException("GRASS folder is not configured.\nPlease configure it before running GRASS algorithms.")
useSelection = SextanteConfig.getSetting(SagaUtils.SAGA_USE_SELECTED)

commands = []
self.exportedLayers = {}
self.numExportedLayers = 0;

if self.needsregion:
self.calculateResamplingExtent()
GrassUtils.createTempMapset();

if self.needsregion:
command = "g.region"
command += " n=" + str(self.ymax)
command +=" s=" + str(self.ymin)
command +=" e=" + str(self.xmax)
command +=" w=" + str(self.xmin)
command +=" res=" + str(self.cellsize);
commands.append(command)

#1: Export layer to grass mapset
for param in self.parameters:
if isinstance(param, ParameterRaster):
if param.value == None:
continue
value = param.value
commands.append(self.exportRasterLayer(value))
if isinstance(param, ParameterVector):
if param.value == None:
continue
value = param.value
self.exportVectorLayer(value)
if isinstance(param, ParameterTable):
pass
if isinstance(param, ParameterMultipleInput):
if param.value == None:
continue
layers = param.value.split(";")
if layers == None or len(layers) == 0:
continue
if param.datatype == ParameterMultipleInput.TYPE_RASTER:
for layer in layers:
commands.append(self.exportRasterLayer(layer))
elif param.datatype == ParameterMultipleInput.TYPE_VECTOR_ANY:
for layer in layers:
if (not value.endswith("shp")) or useSelection:
commands.append(self.exportRasterLayer(layer))

#2: set parameters and outputs
command = self.name
for param in self.parameters:
if param.value == None:
continue
if isinstance(param, (ParameterRaster, ParameterVector)):
value = param.value
if value in self.exportedLayers.keys():
command+=(" " + param.name + "=" + self.exportedLayers[value])
else:
command+=(" " + param.name + "=" + value)
elif isinstance(param, ParameterMultipleInput):
s = param.value
for layer in self.exportedLayers.keys():
s = s.replace(layer, self.exportedLayers[layer])
s = s.replace(";",",")
command+=(" " + param.name + "=" + s);
elif isinstance(param, ParameterBoolean):
if param.value:
command += param.name
else:
command+=(" " + param.name + "=" + str(param.value));

for out in self.outputs:
command+=(" " + out.name + "=" + out.name);

command += " --overwrite"
commands.append(command)

#3:Export resulting layers to a format that qgis can read
for out in self.outputs:
if isinstance(out, OutputRaster):
filename = out.value
#Raster layer output: adjust region to layer before exporting
commands.append("g.region rast=" + out.name)
command = "r.out.gdal -c createopt=\"TFW=YES,COMPRESS=LZW\""
command += " input="
command += out.name
command += " output=\"" + filename + "\""
commands.append(command)
if isinstance(out, OutputVector):
command = "v.out.ogr -e -z input=" + out.name
command += " dsn=\"" + os.path.dirname(out.value) + "\""
command += " format=ESRI_Shapefile"
command += " olayer=" + os.path.basename(out.value)
command += " type=auto"
commands.append(command)

#4 Run GRASS
GrassUtils.createGrassScript(commands)
loglines = []
loglines.append("GRASS execution commands")
for line in commands:
loglines.append(line)
SextanteLog.addToLog(SextanteLog.LOG_INFO, loglines)
GrassUtils.executeGrass(progress);


def exportVectorLayer(self, filename):
destFilename = self.getTempFilename()
self.exportedLayers[filename]= destFilename
command = "v.in.ogr"
command += " min_area=-1"
command +=" dsn=\"" + os.path.dirname(filename) + "\""
command +=" layer=" + os.path.basename(filename)
command +=" output=" + destFilename;
command +=" --overwrite -o"
return command


def exportRasterLayer(self, layer):
destFilename = self.getTempFilename()
self.exportedLayers[layer]= destFilename
command = "r.in.gdal"
command +=" input=\"" + layer + "\""
command +=" band=0"
command +=" out=" + destFilename;
command +=" --overwrite -o"
return command


def getTempFilename(self):
self.numExportedLayers+=1
filename = str(time.time()) + str(SextanteUtils.NUM_EXPORTED)
SextanteUtils.NUM_EXPORTED +=1

return filename


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