[processing] When an algorithm has string parameters, also

accept numeric, file and table field inputs in modeler

This allows a non-string parameter to be reused as a string
parameter in contexts where it makes sense.

Author: nyalldawson

python/plugins/processing/gui/wrappers.py

@@ -643,7 +643,9 @@ def createWidget(self):
             if self.param.default:
                 widget.setText(self.param.default)
         else:
-            strings = self.dialog.getAvailableValuesOfType(ParameterString, OutputString)
+            # strings, numbers, files and table fields are all allowed input types
+            strings = self.dialog.getAvailableValuesOfType([ParameterString, ParameterNumber, ParameterFile,
+                                                            ParameterTableField], OutputString)
             options = [(self.dialog.resolveValueDescription(s), s) for s in strings]
             if self.param.multiline:
                 widget = MultilineTextPanel(options)

python/plugins/processing/modeler/ModelerParametersDialog.py

@@ -261,16 +261,22 @@ def showAdvancedParametersClicked(self):
                 self.widgets[param.name].setVisible(self.showAdvanced)
 
     def getAvailableValuesOfType(self, paramType, outType=None, dataType=None):
+        # upgrade paramType to list
+        if type(paramType) is not list:
+            paramType = [paramType]
+
         values = []
         inputs = self.model.inputs
         for i in list(inputs.values()):
             param = i.param
-            if isinstance(param, paramType):
-                if dataType is not None:
-                    if param.datatype in dataType:
+            for t in paramType:
+                if isinstance(param, t):
+                    if dataType is not None:
+                        if param.datatype in dataType:
+                            values.append(ValueFromInput(param.name))
+                    else:
                         values.append(ValueFromInput(param.name))
-                else:
-                    values.append(ValueFromInput(param.name))
+                    break
         if outType is None:
             return values
         if self._algName is None:

python/plugins/processing/tests/ModelerTest.py

@@ -62,6 +62,10 @@ def testModelerParametersDialogAvailableValuesOfType(self):
         self.assertEqual(set(p.name for p in dlg.getAvailableValuesOfType(ParameterFile)),
                          set(['file']))
 
+        # test multiple types
+        self.assertEqual(set(p.name for p in dlg.getAvailableValuesOfType([ParameterString, ParameterNumber, ParameterFile])),
+                         set(['string', 'string2', 'number', 'file']))
+
 
 if __name__ == '__main__':
     unittest.main()