added customizable parameter check before launching algorithms

git-svn-id: http://sextante.googlecode.com/svn/trunk/soft/bindings/qgis-plugin@151 881b9c09-3ef8-f3c2-ec3d-21d735c97f4d
qgis · Apr 25, 2012 · a991808 · a991808
1 parent 0928180
commit a991808
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/src/sextante/core/Sextante.py b/src/sextante/core/Sextante.py
@@ -268,6 +268,11 @@ def runalg(name, *args):
                     return
                 i = i +1
 
+        msg = alg.checkParameterValuesBeforeExecuting()
+        if msg:
+            print ("Unable to execute algorithm\n" + msg)
+            return
+
         SextanteLog.addToLog(SextanteLog.LOG_ALGORITHM, alg.getAsCommand())
 
         QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
@@ -320,6 +325,11 @@ def runandload(name, *args):
                     return
                 i = i +1
 
+        msg = alg.checkParameterValuesBeforeExecuting()
+        if msg:
+            QMessageBox.critical(None, "Unable to execute algorithm", msg)
+            return
+
         QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
         ret = AlgorithmExecutor.runalg(alg, SilentProgress())
         QApplication.restoreOverrideCursor()

diff --git a/src/sextanteexampleprovider/ExampleAlgorithm.py b/src/sextanteexampleprovider/ExampleAlgorithm.py
@@ -66,7 +66,7 @@ def processAlgorithm(self, progress):
         settings = QSettings()
         systemEncoding = settings.value( "/UI/encoding", "System" ).toString()
         provider = vectorLayer.dataProvider()
-        writer = QgsVectorFileWriter( output, systemEncoding,provider.fields(), provider.geometryType(), provider.crs() )
+        writer = QgsVectorFileWriter( output, systemEncoding, provider.fields(), provider.geometryType(), provider.crs() )
 
         #Now we take the selected features and add them to the output layer
         selection = vectorLayer.selectedFeatures()