Merge pull request #7362 from rudivs/update_maplayerwidgetwrapper

luipir · web-flow · commit 1875b025dab6 · 2018-07-11T15:25:12.000+02:00
Add 'not selected' option for optional layer parameters in processing models
diff --git a/python/plugins/processing/gui/wrappers.py b/python/plugins/processing/gui/wrappers.py
@@ -864,10 +864,10 @@ def createWidget(self):
             self.combo = QComboBox()
             layers = self.getAvailableLayers()
             self.combo.setEditable(True)
+            if self.param.flags() & QgsProcessingParameterDefinition.FlagOptional:
+                self.combo.addItem(self.NOT_SELECTED, self.NOT_SET_OPTION)
             for layer in layers:
                 self.combo.addItem(self.dialog.resolveValueDescription(layer), layer)
-            if self.param.flags() & QgsProcessingParameterDefinition.FlagOptional:
-                self.combo.setEditText("")
 
             widget = QWidget()
             layout = QHBoxLayout()
