correctly handle WMS rasters in Random Points tool (fix #5202)

Author: alexbruy

python/plugins/fTools/tools/doRandPoints.py

@@ -79,7 +79,7 @@ def update(self, inputLayer):
             self.cmbField.setEnabled(False)
             self.label_4.setEnabled(False)
 
-# when 'OK' button is pressed, gather required inputs, and initiate random points generation
+    # when 'OK' button is pressed, gather required inputs, and initiate random points generation
     def accept(self):
         self.buttonOk.setEnabled( False )
         if self.inShape.currentText() == "":
@@ -100,7 +100,7 @@ def accept(self):
             self.progressBar.setValue(5)
             mLayer = ftools_utils.getMapLayerByName(unicode(inName))
             if mLayer.type() == mLayer.VectorLayer:
-                inLayer = QgsVectorLayer(unicode(mLayer.source()),  unicode(mLayer.name()),  unicode(mLayer.dataProvider().name()))
+                inLayer = ftools_utils.getVectorLayerByName(unicode(inName))
                 if self.rdoUnstratified.isChecked():
                     design = self.tr("unstratified")
                     value = self.spnUnstratified.value()
@@ -114,7 +114,7 @@ def accept(self):
                     design = self.tr("field")
                     value = unicode(self.cmbField.currentText())
             elif mLayer.type() == mLayer.RasterLayer:
-                inLayer = QgsRasterLayer(unicode(mLayer.source()), unicode(mLayer.name()))
+                inLayer = ftools_utils.getRasterLayerByName(unicode(inName))
                 design = self.tr("unstratified")
                 value = self.spnUnstratified.value()
             else:

python/plugins/fTools/tools/ftools_utils.py

@@ -206,6 +206,16 @@ def getVectorLayerByName( myName ):
             else:
                 return None
 
+# Return QgsRasterLayer from a layer name ( as string )
+def getRasterLayerByName( myName ):
+    layermap = QgsMapLayerRegistry.instance().mapLayers()
+    for name, layer in layermap.iteritems():
+        if layer.type() == QgsMapLayer.RasterLayer and layer.name() == myName:
+            if layer.isValid():
+                return layer
+            else:
+                return None
+
 # Return QgsMapLayer from a layer name ( as string )
 def getMapLayerByName( myName ):
     layermap = QgsMapLayerRegistry.instance().mapLayers()