More responsive feedback when using iterate mode

nyalldawson · nyalldawson · commit 4b81630aa644 · 2017-06-12T13:39:33.000+10:00
diff --git a/python/plugins/processing/gui/AlgorithmExecutor.py b/python/plugins/processing/gui/AlgorithmExecutor.py
@@ -79,7 +79,11 @@ def executeIterating(alg, parameters, paramToIter, context, feedback):
 
     iter_source = QgsProcessingParameters.parameterAsSource(parameter_definition, parameters, context)
     sink_list = []
-    for feat in iter_source.getFeatures():
+    if iter_source.featureCount() == 0:
+        return False
+
+    total = 100.0 / iter_source.featureCount()
+    for current, feat in enumerate(iter_source.getFeatures()):
         if feedback.isCanceled():
             return False
 
@@ -88,6 +92,8 @@ def executeIterating(alg, parameters, paramToIter, context, feedback):
         sink.addFeature(feat)
         del sink
 
+        feedback.setProgress(int(current * total))
+
     # store output values to use them later as basenames for all outputs
     outputs = {}
     for out in alg.destinationParameterDefinitions():
