[processing] added algs to set style of layer

Author: volaya

python/plugins/processing/algs/qgis/QGISAlgorithmProvider.py

@@ -99,6 +99,8 @@
 from PointsToPaths import PointsToPaths
 from PostGISExecuteSQL import PostGISExecuteSQL
 from ImportIntoPostGIS import ImportIntoPostGIS
+from SetVectorStyle import SetVectorStyle
+from SetRasterStyle import SetRasterStyle
 # from VectorLayerHistogram import VectorLayerHistogram
 # from VectorLayerScatterplot import VectorLayerScatterplot
 # from MeanAndStdDevPlot import MeanAndStdDevPlot
@@ -154,7 +156,8 @@ def __init__(self):
                         RandomPointsLayer(), RandomPointsPolygonsFixed(),
                         RandomPointsPolygonsVariable(),
                         RandomPointsAlongLines(), PointsToPaths(),
-                        PostGISExecuteSQL(), ImportIntoPostGIS()
+                        PostGISExecuteSQL(), ImportIntoPostGIS(),
+                        SetVectorStyle(), SetRasterStyle(),
                         # ------ raster ------
                         # CreateConstantRaster(),
                         # ------ graphics ------

python/plugins/processing/algs/qgis/SetRasterStyle.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    SelectByLocation.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.QtCore import *
+from PyQt4.QtXml import *
+from qgis.core import *
+from processing.core.GeoAlgorithm import GeoAlgorithm
+from processing.parameters.ParameterFile import ParameterFile
+from processing.parameters.ParameterRaster import ParameterRaster
+from processing.outputs.OutputRaster import OutputRaster
+from processing.tools import dataobjects
+from qgis.utils import iface
+
+class SetRasterStyle(GeoAlgorithm):
+
+    INPUT = 'INPUT'
+    STYLE = 'STYLE'    
+    OUTPUT = 'OUTPUT'
+
+
+    def defineCharacteristics(self):
+        self.allowOnlyOpenedLayers = True
+        self.name = 'Set style for raster layer'
+        self.group = 'Raster general tools'
+        self.addParameter(ParameterRaster(self.INPUT, 'Vector layer'))        
+        self.addParameter(ParameterFile(self.STYLE,
+                          'Style file', False, False, 'qml'))
+        self.addOutput(OutputRaster(self.OUTPUT, 'Styled layer', True))
+
+    def processAlgorithm(self, progress):
+        filename = self.getParameterValue(self.INPUT)
+        layer = dataobjects.getObjectFromUri(filename)        
+        
+        style = self.getParameterValue(self.STYLE)
+        with open(style) as f:
+            xml = "".join(f.readlines()) 
+        d = QDomDocument();
+        d.setContent(xml);
+        n = d.firstChild();        
+        layer.readSymbology(n, '')                
+        self.setOutputValue(self.OUTPUT, filename)
+        iface.mapCanvas().refresh()
+        iface.legendInterface().refreshLayerSymbology(layer)

python/plugins/processing/algs/qgis/SetVectorStyle.py

@@ -0,0 +1,63 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    SelectByLocation.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.QtCore import *
+from qgis.core import *
+from processing.core.GeoAlgorithm import GeoAlgorithm
+from processing.parameters.ParameterVector import ParameterVector
+from processing.outputs.OutputVector import OutputVector
+from processing.parameters.ParameterFile import ParameterFile
+from processing.tools import dataobjects
+from qgis.utils import iface
+
+class SetVectorStyle(GeoAlgorithm):
+
+    INPUT = 'INPUT'
+    STYLE = 'STYLE'    
+    OUTPUT = 'OUTPUT'
+
+
+    def defineCharacteristics(self):
+        self.allowOnlyOpenedLayers = True
+        self.name = 'Set style for vector layer'
+        self.group = 'Vector general tools'
+        self.addParameter(ParameterVector(self.INPUT, 'Vector layer',
+                          [ParameterVector.VECTOR_TYPE_ANY]))        
+        self.addParameter(ParameterFile(self.STYLE,
+                          'Style file', False, False, 'qml'))
+        self.addOutput(OutputVector(self.OUTPUT, 'Styled layer', True))
+
+    def processAlgorithm(self, progress):
+        filename = self.getParameterValue(self.INPUT)
+        layer = dataobjects.getObjectFromUri(filename)        
+        
+        style = self.getParameterValue(self.STYLE)
+        layer.loadNamedStyle(style)        
+        
+        self.setOutputValue(self.OUTPUT, filename)
+        iface.mapCanvas().refresh()
+        iface.legendInterface().refreshLayerSymbology(layer)